Dell Precision 7540 and 7740 Owner's Thread

It seems like most kits actually work, you just need to wait 30-40 seconds on that initial boot after installing the ram. If you want to be safe go to crucial's website which has compatible modules listed for the 7740, both 2666mhz and 3200mhz.

 

Oh thanks. I did look at Crucial. The Crucial 8Gb and 16Gb 3200 modules are backordered and are also only CL22. The HyperX HX432S20IBK2/32 is CL20 and is available (https://www.kingston.com/dataSheets/HX432S20IBK2_32.pdf). Would something else be better?

I read that the g.skills ripjaws (8gb is F4-3200C16D-16GRS) won't step down to 2666 if 3200 won't run. I'm not sure that's a problem or not.

 

Hi people! A few days ago I received my dell precision 7540. Configuration: i9 9880h, 16gb 2666Mhz ram, nvidia rtx 3000, 512gb ssd, fullHD(1920x1080), win10 pro. After the purchase, I added 16gb Ram (2x8gb hynix 2666mhz), ssd 1tb samsung 970pro m2. Made undervolting of the cpu -125Mv. Under load, the processor holds a frequency of 4.1 GHz on all cores at temperatures of about 85 degrees. Ubuntu 19.10 was also installed immediately. Everything seems to work very well. I was especially pleased that although HDMI only works on a discrete graphics card, a thunderbolt-connected monitor works fine on an intel graphics card and the laptop remains quiet and cold.

The laptop was bought as a machine for the developing (Java + AI + machine learning), to replace the macbook pro 2017, which began to annoy me very much. Therefore, I can’t say anything about the screen, it seems to be quite good, but there are problems with the backlight below, like many. Noticeable only on a black background.

While I am very pleased with the purchase and use it with great pleasure.

 

Setup a 7540 for a friend. Some thoughts:

1.) It's really easy to remove/ruin the threading of the NVME cover screws, be careful.

2.) For those that need more storage the 2.5" Micron 5200 ECO 7.68TB TLC SSD I put in it worked just fine:
https://www.amazon.com/gp/product/B07BJ75JN1

3.) This was setup with dual monitors, the monitor connected via the HDMI port worked fine. However the monitor connected via the mini displayport to display port cable kept flickering and sometimes blacking out. I ended up using one of theThunderbolt ports for the second monitor with a USB-C to HDMI cable.

https://www.amazon.com/gp/product/B07RXS39D3/

 

Is anyone using a UHD built-in display with regular-resolution external monitors and able to share their experience?

I'm trying this with my old UHD laptop and it's awkward. The built-in display has a Windows 10 text/icon scaling of 225% or 250% and the external monitors are 100% (two 2560x1440 27" displays). I was thinking that the high resolution 17" display would give me smoother text and allow me to adjust the size to suit my preferences especially when I'm working without the monitors. Now I'm wondering if I'd be happier with just a FHD 1920x1080 (slightly uncomfortably small text and icons) or base 1600x900 (comfortable, but less able to see a lot at a time) display. I'd be "stuck" with the fixed size this way, but there wouldn't be scaling weirdness when using multiple monitors.

I'm using this for web development. It's not too late for me to cancel my order and re-order with a different display.

 

I've worked with some mixed setups like this. At work I have the laptop internal 4K display running at 200%, and two larger external 4K displays running at 150%.

Even if they do support scaling at all, not many apps support different monitors with different scaling levels properly. You'll want to be aware that for these apps, they will run at the scaling ratio of your "primary" monitor and then Windows will do bitmap scaling (up or down) for all secondary monitors. For the best "crispness" then you would want your highest ratio monitor to be the primary and then get used to things getting "blurred" when running on a lower-DPI monitor.

Things are improving. For example, both Office (365) and Visual Studio (2019) have added multi-monitor scaling support in the past year, so the apps will adjust properly when moved between monitors at different scaling levels. All major web browsers have supported this for a while now.

If it bothers you, the best thing to do is get a setup that allows you to use the same scaling ratio across all of the monitors.

 

Some great information on this thread so far. Thanks.

My 15" 7540 comes tomorrow.

Intel Xeon E-2286M Processor, Quadro RTX 3000, 1080p screen (couldn't find one in 4K).

I'm looking at 32GB memory modules. In the UK, the only RAM I can see at that size is the Samsung 2666 CL19 (M471A4G43MB1-CTD).

Anyone using this already? Looks like it should work fine.

I have two hyper X 16GB modules already at 2666 CL15. I may throw it in this laptop too until I put the memory into another laptop. Would it still work in quad memory mode if the latencies are different?

Going to put my 970 Evo Plus into it but might buy another SSD too.

Will do an unboxing and open up the back of the laptop on a video on my YouTube channel when it arrives. If anyone wants me to show anything specifically, let me know.

Kevin

 

Not sure how I missed this before, but Crucial have some 32GB modules too. It's actually a little bit more expensive. Around £614 for 128GB of RAM compared to £535 for the Samsung.

https://uk.crucial.com/gbr/en/compatible-upgrade-for/Dell/precision-7540#MEMORYFilters

Same as Samsung RAM. CL19, 2666 32GB sticks.

Looking at the specs, they seem identical. Perhaps they are.

 

That's what I've been looking at tonight.

The official Dell website says:

I'll be using mine a lot for video editing and will be recording in 4K more so want at least 64GB. The faster memory speed helps, but obviously I don't want any stability issues and by the looks of it, Dell are saying it only officially supports 2933mhz up to 64GB and 2666mhz to 128GB.

I'd be interested to hearing what RAM modules others are using and whether there are any issues.

Hyper X has 2933mhz in 16GB CL17 modules. That might be a safer bet than 3200.

Can't seem to find any official Dell compatibility page about which memory modules are supported.

 

Dell added 3200 MHz modules after the system launched so probably there are bits of documentation that haven't been updated. (Not the first time that this has happened.) In any case, with the CL variance, modules with a higher MHz rating and correspondingly higher CL rating might not be faster in practice.

Dell doesn't typically offer super detailed information about which modules are supported. Best bet is to buy modules similar to what they are offering with the system, or buy modules that other users have reported success with.