Sager NP9758-G / Clevo P750DM-G Review: i7-6700k, 64GB DDR4L RAM, GTX 980m 8GB, 4k 60Hz LCD
Sager continues to bring us the latest updates in technology as it progresses and have recently updated their flagship desktop CPU toting laptop, the NP9773 with G-sync technology and Broadwell quad core desktop CPU's to the new NP9758-G but including Intel Skylake CPU support along with other nice new features like USB 3.1/Thunderbolt and of course DDR4L which comes along with the Skylake technology allowing for up to 64GB of RAM.
Many thanks to LPC-Digital for providing a review sample which came nicely equipped to showcase its features. The specifications for the review laptop is as follows:
SPECIFICATIONS
Sager NP9758-G based on Clevo P750DM-G
15.6” 4K QFHD 16:9 Wide screen (3840x2160) SAMSUNG Super Clear Matte Type
6th Generation Intel Core i7-6700K (8M Cache, up to 4.20 GHz)
NVIDIA GeForce GTX 980M with 8GB GDDR5 NVIDIA G-SYNC
SAMSUNG 64GB DDR4 PC4-17000 2133MHz Memory (4x16GB)
512GB Samsung SM951 M.2 PCI-e SSD
1TB 7200RPM HDD
Windows 10 Home 64-Bit Edition Preinstalled, (with 64-Bit USB Recovery Media)
Intel Dual Band Wireless -AC 8260 M.2 Wireless LAN + Bluetooth Module 4.0
Full Range 330W AC Adapter 19.5V
A full review of the NP9773 from earlier this year can be found here: http://forum.notebookreview.com/thr...0zm-g-980m-g-sync-review-by-htwingnut.777906/
A brief overview video of the system can be seen at YouTube here:
AROUND THE LAPTOP
The chassis carries over from the NP9773 / P750ZM-G with the exception of the addition of the USB 3.1 / Thunderbolt port on the left hand side replacing an existing USB 3.0 port. The surface of the lid and around the keyboard are black matte soft touch. The matte black plastic bezel surrounding the LCD is about 1/2" width and runs down to the two robust hinges attaching it to the main body. A speaker bar runs across the top/rear edge of the chassis with a silver glossy power button and status light centered between the speaker grille an the keyboard. The keyboard continues with the 15" style traditional non-island type keys and is fully programmible multi-color backlit. Key travel is normal, and quiet, and structuarally very firm with no noticeable flex in any location. The WSAD keys have a thin white line around the edge of the keys to highlight the traditional gaming keys. Touchpad is a non-glossy surface with good traction and two separate mouse buttons with a fingerprint reader in between the mouse buttons.
Underneath are two access panels, one primarily for drive storage and the other to access most of the rest of the other components. The black plastic bottom panels are secured with four screws for the main bay and two for the drive storage. Once opened, with traditional Clevo design, pretty much all components are easily accessed including the CPU and GPU and its massive single heatpipe/heatsink assembly that cools the 95W i7-6700k CPU and 100W+ 980m GPU. Only the wireless card and two of the four RAM slots are located beneath the keyboard which can easily be disengaged by removing two screws and popping it open as seen HERE:
Ports around the laptop are plentiful with four 3.5mm/ 1/8" audio jacks: SPDIF/Digital out, headphones, microphone and audio out on the right side along with a single USB 3.0 port and a lock slot. The left side offers a gigibit ethernet jack, two USB 3.0 ports, one type C USB 3.1/Thunderbolt port, card reader and an eSATA/USB 3.0 combo port. Unfortunately I do not have any USB 3.1 or Thunderbolt devices to trial the port, otherwise I would give it an evaluation.
Video outputs run along the back side along with the four pin power adapter. Three A/V jacks available are two DisplayPort and one HDMI. All three ports can be used simultaneously in addition to the built in LCD as seen here (it's NP9773 not the NP9758-G but it works with NP9758-G as well):
BIOS
One of my biggest complaints about Clevo and Sager is their sparse BIOS options. Thankfully tools like Intel XTU (Extreme Tuning Utility) help circumvent some of the overclocking and over/undervolting limitations, but it can't correct for implementation of other tuning options. That being said, while I can't officially endorse the use of third party BIOS or vBIOS options since it could void your warranty, they are available and can and do improve performance and stability, and add a lot of configuration options.
In any case here is a view of the BIOS in the NP9758-G:
COMPONENTS
For the most part, the same components comprise the NP9758-G as were in the NP9773, with the exceptions as noted earlier with the addition of the Skylake CPU with which DDR4L and USB 3.1 come along for the ride.
Keyboard
The keyboard is used across the board for Clevo's higher end 15" and 17" models but has a great overall feel and responsiveness. The biggest concern which is not unique to the NP9758-G, is that the key repeat rate is much slower than your typical keyboard. Even a USB keyboard has much faster keyboard repeat rate. Thankfully there is a workaround which I posted HERE, however it would be nice to see Clevo offer an EC/Firmware update to correct this natively. Otherwise the keyboard is great for general work and gaming, though and have not noticed any ghosting issues from traditional keyboard combos in some of the more popular games like CoD, BF4, Witcher 3, or Mad Max. Colors and macros can be programmed with the included Clevo FlexiKey software.
Storage
Up to four storage drives can be held internally, two 2.5" 7mm or 9.5mm height SSD's or hard drives, and two M.2 SSD's, with one of the slots supporting 4x PCIe NVMe or AHCI M.2 SSD. This particular model houses a Samsung SM951 512GB PCIe AHCI M.2 SSD and a 2.5" 1TB 7200RPM hard drive. The SM951 drive suffers from the same high temperature throttle concerns (at 81C) as previous models, but it's inherent in the design of the drive not a fault of the laptop. Sager does include two thermal pads to go on the SSD which helps reduce the time it takes for the SSD to reach thermal throttling, and only occurs in cases of extended sequential drive reads or writes. Otherwise this drive can fly and is one of the fastest consumer SSD's availble at the moment.
CrystalDiskInfo of the SM951:
Here is an example of the SM951 throttling with sequential read and writes using CrystalDiskMark. It usually happens with writing as reads usually keep temps below 81C.
With sufficient cooling, however, you can avoid throttling and maintain consistent performance. For this test I reduced the test sample size to 100MB instead of 1GB and also opened the bottom panel with the SSD and ran a small USB powered fan over the SSD. It really doesn't take much to keep temps low enough, just Sager and/or Clevo need to implement a better solution in my opinion.
Actual potential performance can be seen here in this CrystalDiskMark image:
The hard drive is an HGST Travelstar 7K1000 HTS721010A9E630 1TB 7200RPM.
Wireless Intel 8260-AC
Intel has offered a refresh of their 802.11 AC wireless adapter from the 7260AC to the 8260AC. From specifications, it does appear they are the same cards but added support for Bluetooth 4.1 and 4.2 which basically helps mitigate interference from 4G signals, over double the speed, and adds IPv6 compatability.
As far as a Wirless AC device, wireless transfers of up to 50MB/sec were achieved when running through two drywalls about 25 feet away from the router, with no noticeable lag spikes that were prominent with the 7260 early in its release.
Sager also offers the Killer Wireless 1535 AC adapter as well, which LPC-Digital offered with this review package in addition to the Intel 8260. Users have had issues with the bluetooth of the Killer cards, however transfer speeds tended to better the Intel cards at peak sequential speeds by 5-8MB/sec up to 60MB/sec.
RAM
Here is one great selling points of this laptop for those that need or desire a large amount of RAM. DDR3 So-DIMM modules capped out at 8GB so that limited most laptops to 32GB of total RAM with four RAM slots. Now 64GB is available with introduction of Skylake and DDR4 modules, and this system has four 16GB 2133MHz modules.
The biggest downside of DDR4 is that the latencies are higher, but higher clock speeds can be achieved than with traditional DDR3. As noted earlier, two RAM slots are located in the bottom bay, and the other two under the keyboard. Matched pairs of RAM should be installed either under the keyboard or under the bottom panel, or both.
With this much RAM and with a desktop CPU it opens up options ofor users that felt constrained by 32GB max RAM in the past. Larger RAM sizes means more or more complex virtual machines can be run, video and photo editors will have more room to work with larger and/or more image files, or just using a RAM disk to improve overall performance of the system.
Here is a CPU-z and HWInfo Shot of the RAM.
With a RAM disk and 64GB of RAM, users could easily use 48 to 56GB as a RAM disk and still maintain 8-16GB of RAM for your system. SoftPerfect RAM disk is a great free RAM disk for non-commercial use. Here is an example of the performance achieved with a RAM disk using SoftPerfect RAM disk, which results in insanely fast disk I/O.
LCD and G-Sync
4k LCD's are becoming more commonplace now, although not so much in the G-sync list of approved panels yet. The included LCD is a Samsung 4k Matte LCD with 60Hz refresh rate, which bends the rules a bit in order to meet Nvidia's soft requirements of 75Hz or above. While 60Hz is more than adequate for running most games at the native 4k resolution since frame rates don't typically exceed that, running games at 1080p will still limit the FPS to 60Hz when running G-sync. Nvidia Control Panel includes the ability to add custom resolutions including refresh rate. This particular model was able to overclock to 67Hz only. This is of coruse, of minor concern for the most part because G-sync can really smooth the video experience when running from 40-60 FPS (and above), however something to consider if you desire/need higher refresh for twitch games like Counter Strike. There is an option for a 1080p G-Sync LCD which has a stock refresh of 75Hz and the one in my NP9773 can overclock up to 90Hz with no issue.
I have included an image of the front of the LCD since angle shots resulted in some glare on the LCD despite it being in a dark room and did not exist in real life.
HWInfo64 indicates the LCD as Samsung FL156Fl02-101 (Hardware ID SDC434B) and the closest match that can be found online with specs is the LTN156FL02-01 which is also a Samsung 4k IPS LCD with specifications that can be found here: http://www.panelook.com/LTN156FL02-L01_SAMSUNG_15.6_LCM_overview_23360.html
Whether this is the exact panel or not I am not certain, but likely is.
That aside, users looking for a quality LCD aside from gaming will find this display stunning. As with most IPS displays it does suffer from some noticeable light bleed with a dark screen, otherwise nothing objectionable. Viewing angles are superb as are the brightness and contrast. Overall color reproduction as well as viewing angle photos can be seen below.
The LCD color gamut after calibration resulted in the following:
sRGB 97%
Adobe RGB 78%
NTSC 74%
CPU - INTEL i7-6700k SKYLAKE
The introduction of Skylake also brings to the table a couple additional technologies including DDR4 and USB 3.1/Thunderbolt technologies, not to mention 14nm manufacturing process. The review sample NP9758-G included the Intel i7-6700k CPU which is a great fit for the cooling solution at 91W TDP with quad core and hyperthreading. That being said there isn't a lot of improvement to be found with raw horsepower, as a same clocked Haswell in the previous NP9773 are within 5% of each other.
The i7-6700k runs at a base frequency of 4.0GHz with a boost to 4.2GHz with a single thread. Clock speeds can be adjusted as well as TDP values and voltage using Intel Extreme Tuning Utility.
Intel XTU Screenshot of i7-6700k
CPU-Z Screenshot of i7-6700k
I pitted the i7-6700k (91W TDP) against the i7-4790k (88W TDP) in the NP9773 as well as the hexacore i7-5820k Haswell-E (140W TDP) in my desktop, as well as an i7-4710HQ (47W TDP) in a Clevo P650SE just to give a matter of reference and ran a handful of benchmarks at same clock speeds of 4GHz (i7-4710HQ @ 3.5GHz). Obviously in highly threaded applications the hexacore will prevail, but it's there to offer a frame of reference.
CPU Benchmark Results:
Cinebench R15
wPrime 2.10 1024MB
x264 v5.0
GPU - NVIDIA GEFORCE GTX 980M
The 980m has been the top end mobile GPU for over a year now and continues to perform awesomely with the latest games at 1080p at high detail settings. Considering the advent of 4k LCD's however, which this LCD comes equipped with, it pushes the limits a little bit. The 980m offers 8GB of 5000MHz GDDR5 video RAM as well as a fast 1038MHz with boost to 1126MHz and in the MXM 3.0b form factor which allows it to be replaced down the road should the GPU fail or better options become available.
It is unfortunate to note that this 980m suffers the same issue as other 980m GPU's in other Clevo based laptops is that it will clock and voltage throttle some at peak load despite running at reasonably cool temperatures. This rarely results in any noticeable visual issues, but it can. A third party vBIOS, like from talented users like Prema, usually will correct this issue, albeit at risk of voiding warranty (check with your seller). Although flashing the vBIOS is usually a painless and easy process, there are risks involved, with worse case having a bricked GPU. In the case of a laptop like the NP9773 that can be a bit problematic because it does not have the Intel GPU to fall back on and a blind flash or use of an SLI or Optimus laptop with MXM 3.0b slot may be needed to properly flash it back. But enough about the disclaimers!
Here are some voltage and clock speed graphs from a few select games that shows the issue/concern with varying clock speeds and voltages (temperatures remain under 70C for the most part too):
Crysis 3 Voltages and Core Clock Speeds:
FFXIV Heavensward Benchmark Voltages and Core Clock Speeds:
Metro Last Light Redux Voltages and Core Clock Speeds:
The 980m performs admirably, however, with the latest games at 1080p. 4K is a bit of a challenge, but it even challenges high end desktops, so if you're looking for a 4K LCD, still expect to play at 1080p. Game scaling from 1080p to 4k looks very good, although it helps to apply at least 2xMSAA to improve the visual fidelity a bit. G-sync is a nice addition that smooths out the performance in general, as long as the games are capped at the refresh rate of the LCD, which G-sync does by default when enabled in the Nvidia Control Panel.
For game and performance benchmarks I have provided results at 1080p and 4k results of the 980m for some of the more popular and demanding video games and artificial benchmarks out there:
SOFTWARE
As is typical with Sager builds, the laptop comes without any bloatware or shareware, it's just a clean install of Windows with a few of their apps. This includes the full featured keyboard backlight and macro editor, Clevo Control Center for control of basic system functions like power and fan profiles, and Sound Blaster audio tuning suite.
POWER AND COOLING
The NP9758-G has a monster heatpipe cooling solution that manages a 100W+ GPU and essentially a 100W+ CPU using the same heatpipes but cooled through two separate fans. Considering the system has these components, the system power draw is also substantial, but you have the option to purchase a 330W power supply with this machine, although the stock 230W seems to be more than adequate for a stock configuration or slight overclock of the GPU. There isn't much thermal headroom for the CPU, but a little wiggle room if one is so inclined to push the CPU a little bit.
You can easily see the cooling system by removing the bottom panel:
In any case, following are the peak power draw results from the wall during benchmarking and compared with the previous generation NP9773 (P750ZM-G):
System temperatures during these benchmarks were also recorded and compared with the Sager NP9773 (P750ZM-G):
CPU TEMPS
GPU TEMPS
It is clear that the new Skylake system has improved on power consumption by a measurable amount with slightly improved thermals, while maintaining similar gaming performance numbers.
Battery Life
While there is reduced power at load, a movie test was run and compared between the Sager NP9773 and NP9758-G to see if the Skylake architecture also improved low power consumption as well. The results are minor improvements, but improvements nevertheless. Having over two hours of battery life is a nice feat considering the powerful components comprised of the NP9758-G. So while it won't get you through a marathon of meetings or movies on an overseas flight, it is enough to manage daily tasks and multimedia for short stints while in beteen outlets.
CONCLUSION
The Sager NP9758-G builds on its predecessor, the NP9773, by adding the Skylake architecture which includes the new 14nm i7-6700K CPU, USB 3.1/Thunderbolt, as well as including the new Intel 8260AC wireless adapter, 64GB maximum RAM option, not to mention offering a 4k G-sync LCD. There are measurable improvements in power load and thermals while maintaining similar performance when compared with the Haswell based NP9773. There are still improvements that could be made like a more stable GPU voltage and clock speeds, although it didn't seem to have much visual impact during gaming, it's still something that should and could be corrected. Having ample storage is nice with two form factors with M.2 and 2.5" drive options, however, while inclusion of M.2 PCIe NVMe and AHCI is nice, the drives do not have adequate cooling in such a system for users that will push sequential reads and writes on a regular basis.
At the moment the NP9758-G offers the best performance money can buy in a mobile platform, especially for gaming. While the 980m is starting to age a little bit, it's still top dog, and will be a while before it is trumped by Nvidia's own Pascal likely in another 6-8 months time. Of course there will be the desktop 980 in mobile form factor coming soon, but that's a mixed bag and likely won't offer much benefit in a system like this. Gaming performance in general is stellar at 1080p, however 4k is still pushing the limits of this technology for it to be usefuly for gaming. But 4k is more than just about gaming, and thankfully the 4K LCD is a great choice for videophiles.
I believe the Sager NP9758-G is a great choice for gamers and professionals alike. It offers desktop performance in a portable package and doesn't scream "I'm a gamer" with the appearance. This is as close to a perfect laptop as you'll find today.
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Absolutely great review mate! Immensely detailed and insightful. I'm sure a lot of people will find it useful .
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Wohoo, the Master at work!
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Well done,useful information,appreciating you time and effort in bringing us this insightful review.
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Meaker@Sager Company Representative
Nice work as usual
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Stupid me. I put everything at NP9778 when it should be NP9758-G. I just corrected the text but not the images.
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Support.1@XOTIC PC Company Representative
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Wingnut what the boot time? Also do you think the 950 pro m.2 will run cooler than the sm.951?
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Meaker@Sager Company Representative
I think temperatures will be pretty similar.
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M.2's run hot no matter what. M.2 SATA will run cooler, but also will be limited by SATA bus speeds. So take your pick. Honestly unless you absolutely need fast sequential transfer speeds, just stick with 2.5" drives for now.
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Meaker@Sager Company Representative
Most users wont load the M.2 drives to the point they get really hot usually, then again then you are not using the speed ALL that much. The M.2s are great if you want to slap in 4TB of mechanical storage too though.
Spartan@HIDevolution likes this. -
Whats the difference between the P753DM-GS and the P753DM-G versions?.
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This laptop is for sale here: http://forum.notebookreview.com/thr...-64gb-ddr4-980m-8gb-512gb-samsung-m-2.783730/
New this config costs over $3500, Selling for $2800jaybee83 likes this. -
What are the surface Temps like?
Sent from my SM-T705W using Tapatalk -
Hi HTNut
Could you contact me about this Laptop that is for sale please? -
Meaker@Sager Company Representative
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will a 230 watt power brick choke a p770dm with 6700k @stock and gtx 980m @1300?
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Meaker@Sager Company Representative
A mild GPU overclock should be ok, if you don't play with voltages.
Riddhy916 likes this. -
HTWingNut, which software did you use to graph the color gamut?
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Hi, I'm looking to buy this laptop, but I have a few concerns:
1) I heard the there's an issue with using two m.2 slots at once, you can only use one at a time. Still true? Is it being looked into?
2) I heard this laptop has no nvidia optimus and the intel gpu has been disabled. Why is this, and isn't it a huge drawback as far as power and heat? Are there advantages to it?
3) The samsung FHD is rated 300 nits and the samsung 4k is rated 270 nits. Is this a serious disadvantage to the 4k screen? Is it noticeable? I've heard that below 300 nits is on the dimmer side.
Thanks for any help. -
My friend had Nits when we were kids in his hair. I wasn't allowed to play with him until he had washed his hair with special shampoo. Not sure if this helps?.
Joking aside. I am expecting this laptop soon. I will give you an update on the Screen as soon as it arrives. -
HTWingNut likes this. -
Sent from my VS980 4G using Tapatalk -
Meaker@Sager Company Representative
4x PCI-E + SATA should be fine.
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Anyone having issues with nvidia game ready driver. I have 980M with 354.09 and it checks for drivers but says it updated. BUt then I see the later game ready drivers, download them , but it won't install saying I don't have compatible graphics hardware.
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cant play star wars battlefront without the driver update. anyone have a solution? Or do we have to wait weeks till clevo/sager/nvidia/microsoft fix the issue? -
The P750DM isn't currently "approved" for those new drivers. So you can either wait for the next driver update, or you can mod your driver and install it with "driver signature enforcement" disabled.
NVIDIA/Clevo is aware of this issue. -
Think yourselves lucky. My laptop hasn't arrived yet. I am looking forward to having this problem.
jaybee83 likes this. -
My laptop just arrived. Having some issues already. The top row of keys with volume brightness etc dont seem to be working. Is this a driver thing?.
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Meaker@Sager Company Representative
Is the hotkey software installed? Did you get it with an OS or put one on yourself?
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Thanks Meaker. Unfortunately it was me being a Titty and didn't clock the FN key.
jaybee83 likes this. -
Excellent review HTWingNut
Just a quick question.
At 4k gaming is it a slide show based on those frame rates?
Also, is 1080p (non native) resolution blurry on this LCD?
TIA. -
Meaker@Sager Company Representative
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Hi @HTWingNut ... Got a couple questions. I'm looking at getting a laptop before Christmas, and the '9758 is one I've been considering.
Yours has a 4K screen. How is the battery life when running it in 1080p, and how is the scaling at that resolution?
Is it possible to run with only integrated graphics, or at least run just the integrated GPU even if you have a GPU installed? (If I have to get one I'd probably get a 965M or 970M depending on how much it costs - if it's more than $150 difference in price I'd prefer the 965M.) If it's possible to run the iGPU, how much does battery life improve, or if you have to use the discrete, how low-power can it run when it's not being stressed, or I want to manually cap it? (I'd still like the power available for when I need it, otherwise I'd probably get something else with just an iGPU or a 920M or something.)
Is Linux usable on it, while still having keyboard backlight (even if it's not as customizable), low-power graphics when the high-power graphics isn't needed, etc?
Also if I decide to go for the 9758 (or Clevo P750DM-G), instead of the MSI GT72 or Asus G752, what would be recommended places to buy? Also I'm considering the other 2 because they have built-in optical drives, which I'd prefer. I know Clevo has something with an optical drive as well, but it doesn't use an MXM slot.
I know I can get barebones Clevos from RJTech (and parts from Newegg, except the GPU), but I also see that LPC Digital, Powernotebooks, AVA Direct, Xotic and others are places I could get them. What might be some difference between those vendors, besides their prices? -
Meaker@Sager Company Representative
The P7xx series all have the IGP disabled (and not physically wired to any outputs).
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Okay, thanks, @Meaker. (Also I appreciate what the bottom line on the banner on your company's site - the one mentioning armed forces - says - "We live to serve Him and you!")
Is there a comparable laptop that has room for two 9.5mm-height hard drives (either 2 internal, or 1 internal and 1 in an optical bay via caddy), an MXM graphics slot, and hopefully a desktop CPU socket that allows for using the iGPU?
Oh, and another thing I just remembered I'd like to know. I was reading somewhere (maybe this forum) that the reason the iGPU / Optimus is disabled may have something to do with G-Sync. I've noticed there is a version of the P750DM that doesn't have G-Sync. On RJTech those usually are offered with the Quadro cards, but ... I'm wondering if the non-G-Sync ones can be gotten with a GeForce card, and/or can be run with integrated graphics?
Or, if I'd have to get a discrete GPU, seeing as I'm on a limited budget, could I get a lower-end or last-generation GPU, like a GTX 850M, 930M or 800M? Or maybe a GPU that's around $50-70 and comparable in performance to current or recent-generation integrated graphics (like that in my desktop 4790K)?
As for the limited budget, I was thinking about putting a Pentium G4400 or Core i3-6100 in (and planning to upgrade later to the next-generation i7, assuming it uses the same socket), 16 GB RAM (adding more later), skipping the SSD for now, (I debated whether to get 8 GB of RAM and a 250GB SSD), putting a 2 TB hard drive in (cause I will need the storage right away, I'm taking this on a camping trip over Christmas weekend and I anticipate recording a TB worth of video possibly, and I'd definitely want room to spare), and using Linux (saving the $ on Windows).
I was also looking at the Asus G752, but it uses a non-standard graphics card, and the MSI GT72. The GT72 may still be a possibility, especially if I could get one without a graphics card and just use the iGPU. Also I've noticed in teardown videos that it has what appears to be physical space for a 2nd hard drive, in addition to also having a CD drive. That would be ideal for me, if it actually could be set up that way.Last edited: Dec 1, 2015 -
Meaker@Sager Company Representative
No, all desktop models don't have it wired in. There are plans for a desktop CPU (but low power versions) system with no dedicated graphics.
The cheapest desktop CPU system is the sager NP9758 with 970M and I5 CPU. -
@HTWingNut how do you measure the temps for the SM951 and 950 Pro? Is there a program that does this?
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Support.3@XOTIC PC Company Representative
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Sent from my LG-H811 using Tapatalk -
Meaker@Sager Company Representative
It may just be a version issue as the drives are very new.
TomJGX likes this. -
Sager NP9758-G / Clevo P750DM-G i7-6700k GTX 980m 64GB RAM Review by HTWingNut
Discussion in 'Sager/Clevo Reviews & Owners' Lounges' started by HTWingNut, Oct 31, 2015.