The NEW MSI GS75, 8th GEN Intel, NVIDIA RTX GPU with GDDR6!

How did you shunt mod the GPU? Can you share pictures/details? That is something I had been thinking about for awhile on a thin and light laptop.

 

The current monitoring shunts are on the bottom right of the vrm.



I didn't take an after photo of the shunt mod but the gist of it is that I bridged the current monitoring shunts with solder. As in I shorted the contacts.

 

awesome job!

 

Is there an online guide for max q’s?

I’m surprised there isn’t a software mod to lighten the power restrictions. Obviously some machines can or may not be able to handle it.

 

It has to be a leaked version from internal since VBIOS is protected with security cert nowadays. You can mod it, flash it with an external programmer and it may still not work.

 

Oh believe me, I've tried going for a software solution. They just don't work as intended.

I've gone though 8 different 2080 vbioses and none worked like how I wanted to. The most effective one was a 190w 2080 vbios which raised my firestrike from 21.5k to 23.5k. I still say it didn't work as i wanted as it removed the gddr6 undervolt present on Max-q cards and made it run at mobile/desktop 2080 gddr6 voltages. That resulted in significantly higher achievable memory clocks (8200mhz vs 6900mhz) but as a result the memory consumed more power and resulted in barely any more power going to the gpu core as the ac adapter was already at its limit.

 

What does this mod entail? are you messing with the measurement of power going/used by the GPU so that it can boost more? I could totally try this...

 

Its the same thing as the desktop shunt mods, just on a laptop.

What a shunt mod does is drop the resistance across the current monitoring shunt (5 mohm) by either soldering another shunt in parallel, shorting it with a wire or solder or just outright replacing it with a shunt resistor of lower resistance.

This works because of the way nvidia designs their power delivery circuit. There is a voltmeter across the shunt resistor which measures the voltage drop over the shunt resistor. Then using Ohms Law ( I = V/R ) they can calculate the amount of current passing through the shunt resistor.

Example : 50mv/5mohm = 10A

Then this value is multiplied by the voltage going to the VRMs which is 12V so (P = I*V)

10A * 12V = 120W

Now when we do the shunt mod, we drop the resistance of the shunt resistor, but nvidia's circuitry doesn't know that and still thinks that it's 5mOhms.

A lower resistance will result in less voltage drop across the resistor. So let's say we are still using the same amount of power 120w and our shunt resistor has dropped to 3 mohms.

The voltage drop across the shunt will be :
10A * 3 mohms = 30mv

And the circuitry will do the same thing again

30mv / 5mohm = 6A

6A*12V = 72w

So while the gpu is actually drawing 120w, the gpu will think that its only drawing 72w.

That's how the shunt mod works.

 

Does the GPU use this shunt resistor for any protection or merely for regulation? If only for regulation, I will just short it.

 

Neither, its just for current monitoring.

 

Thank you

Ever since using this mod, has the PSU given you any trouble? I am thinking of limiting my CPU clockspeeds to try and keep power diverted all to the GPU, and not exceed the PSU much.

 

Do you have those power monitoring device to measure the wattage load on the PSU?
https://www.amazon.com/P3-P4400-Ele...s=AC+power+monitor+watt&qid=1586974661&sr=8-2

 

Yep! I do own a killawatt, I used it a lot with the GT80. I managed to kill those PSUs with over 400w of load power when voltage modded haha.

I hope I can perform this mod during the weekend

 

After doing the shunt mod if I try to load both the cpu and gpu to 100% the adapter will automatically switch off so there's no chance of breaking it.

I flattened the gpu frequency curve to 1980mhz (+160 core) and can still run all core 4ghz in firestrike and timespy. The adapter is drawing 235w max in this instance

 

Thanks, that's what I wanted to know. I might limit my CPU a bit in clockspeeds just to have enough leeway and not kill off the PSU (Killing off is what I mean when the PSU protects itself and shuts off).

 

@GenTechPC @ryzeki

https://www.notebookcheck.net/Intel...aside-the-competition-in-3DMark.461912.0.html

CPU score aside (their 8 core vs my 6 core)

i9-10980HK, 2080 super Max-p


Shunt modded GS75

 

Very good.

 

Oh wow, those scores are really good. That's on par with a 2070 super, isn't it? Not shabby at all.

My solder iron broke and since I am confined to home office for the time being, I can't go to my office to steal one from there.

Did you short the shunt with solder only, or did you also use a wire? Which pins do you short?

 

Solder only, wires will interfere with the heatsink (shunts are directly under the vrm heatpipe) . Short across the entire shunt from left to right.

 

Yeah, shunt modding got a performance increase in metro exodus akin to moving from a 2060 to 2070 super

53 to 63 fps average in metro exodus's built in benchmark ,rtx preset.



Though i doubt it'll be enough to run crysis remastered at all high settings (not ultra, not maxed)

 

I bet you will be able to. The remastered version will run on current consoles, so even if those consoles are the equivalent of "minimum" you can certainly do it at 1080p

I remember crysis fondly, it was one of the first games I tried on my then new Asus, with a paltry 9500 GS 512MB GPU, (finished it at minimum-med settings, 20-30fps, 1280x800 res). I moved to a 9800 GS, 260, and it was not until the radeon mobility 5870 that I was able to run it at high settings. That's the last time I used Crysis as a bench "seriously". Though I still played it with my 680m and 780m.

I actually enjoyed Crysis 1 more than 2 or 3. I liked the sandbox approach as well as physics.

This shunt mod really piked my interest in my GS75, thanks seanwee and I look forward to performing the mod asap hahaha. It will help my current annoyance with Dying Light, I think, because I run into weird power limits at times that have severe performance drops to 40s fps at times.

 

It will be able to run for sure, but not at higher settings with 60fps, it has ray tracing after all. Maxed out neon nior should be equal to high-very high crysis.

I played the original crysis the 9800gt at 1600x900 at god knows what settings and framerate. Played crysis 2 first though. Then came crysis 3 and I got the gt640 just cuz the 9800gt doesn't support dx11.

And yeah, when I get bored I try to find more ways to speed up my stuff. So you're welcome

Though I'm already at the limit of what I can do to get more performance. After I get the 330w power brick that will be it.

 

Omg so sorry about that!

 

Wel I ordered and got my iron solder kit. I will do the shunt mod this weekend and report back. Here is hoping nothing gets damaged!

 

With a steady hand, proper technique, some patience and luck it will proceed flawlessly.

 

Is it possible to undervolt the CPU in the BIOS? I have a setting dialed in for Throttlestop and it works great; but I've been playing Valorant, and their anti-cheat software has now completely blocked it from running on the system. Is it a possibility to translate all my throttlestop settings into the bios?

 

Well it seems I did something wrong, my performance remains basically the same. Maybe I didn't solder it correctly.... I might try again tomorrow if I am up to it, but it was quite daunting. Plus it's hard to do so with two kids around.

At least I ended up repasting hah. Is there any way I can confirm this worked? I still see the power limit in MSI After burner.

Yes, you can undervolt in BIOS, you have to use the hidden code to enter advanced BIOS and carefully tweak settings there. Be sure to read more http://forum.notebookreview.com/thr...trol-of-the-i7-8750h-advanced-version.823065/

 

Remember not to melt solder onto the iron and stick it to the shunt resistors. That will result in a cold joint and the mod won't work.

Heat up the pads of the shunt and then melt solder onto both sides then melt more solder until both sides connect.

Make sure to flatten the solder so that it doesn't get too tall and affect the heatsink mount as there is a heatpipe directly above the shunts.

You can make sure that the shunt mod works buy using hwinfo64 and using its on screen display to show the gpu tdp. Mine shows 10w at full load.

 

I was hoping to be able to get 1st place on the firestrike benchmark but this happened

https://www.3dmark.com/fs/22542610

34.4k bloody graphics, this nigga on LN2

For reference a stock 2080TI gets 34.5k graphics.

Edit:Nvm this guy is using an alienware graphics amplifier with a 2080ti :/

 

Was about to point it out that it was impossible for his 2080mQ to get that score haha. You still have pretty darn high scores on your GPU thanks to the shunt mod. I am still waiting for some free time during the weekend to redo- mine.

 

Ran this bench a while ago to have as a baseline before I get the 330w adapter



Even at highest (without RT) SOTR is only 47% gpu bound

For reference at stock (new laptop, no LM or oc) I got 95 fps.

 

Hey everyone!
Can anyone provide a 90w 2080 Super Max-Q bios from their GS75? I wanna flash the GS66 and get some numbers for my comparison.

Let me know!

 

We're all rocking old boys here. No 2080 supers here.

There is a 10th gen GS75 thread but there are no replies yet. Guess nobody has gotten one yet.

Maybe you can try asking for the vbios from company representatives like meaker@sager or gentechpc

 

Geez, I did NOT read the thread title correctly -_- I’m so tired from staying up late and benchmarking lol


Sent from my iPhone using Tapatalk

 

@ryzeki do you keep up with tech leaks?

Cuz I just watched this video and it seems like Turing is going to be kicked to the curb by ampere



How often do you upgrade btw? I'll likely stick with my GS75 till 2022 when hopper, Intel 7nm, and AMD 5nm comes out.

 

I do read about leaks but I tend to be cautious about it and avoid over-expecting. I do hope Ampere is everything and then some, because for me Turing was all in all, a disappointment. But it was a disappointment because Pascal was just outrageously good, and Maxwell as already good. Ampere has potential. I hope it brings a sizable performance jump and not only with RT.

I used to upgrade on a yearly basis up to maybe Kepler. Things started to slow down, and then I started upgrading until there was a noticeable jump or new tech coming out. For example I changed my GT60 with 780m to a GT80 with SLI 980m, then GT73 with unlocked CPU and single 1080 which was stronger than my OC'd sli 980m. I suppose Its around every 2 years for some time now?

I upgraded (or in some ways, sidegraded) to the GS75 to try the portable slim approach (and its rather cool in that regard, I like it) plus 6 core CPUs, but I was a bit disappointed with the 2080MQ. I was expecting around the same performance as my 1080 but on a thin package. But in some ways it was slower due to how power limits work.

Your shunt mod idea has piked my interest and depending on how it goes, it might make me keep my laptop for a longer while still. Do you think the 330w PSU is a must?

But I wonder if I will keep upgrading to laptops, or finally go desktops only.... who knows!

Anyways, if I do buy a new laptop, I am definitely going ryzen next. I am just waiting on next gen high end GPUs to pair them with. If no laptops come with high end GPUs, I might just go desktop.

 

Yeah the enthusiat in me would just love to stay at the highest end of hardware advancements but 3k every year and a half is just wasteful. Yes I can sell my GS75 and get a new laptop but the used market here is pretty terrible. That and only 1% of people here get stuff above 2k.

At the very least I'll probably hold off upgrading until there's an AAA game that I want to play at max settings comes out (still waiting for cyberpunk 2077 :/)

That said, I already have twitchy fingers as 60fps is no longer the target, I'd prefer having at least 90fps to consider it a good experience. 144hz has spoiled me

As for the 330w power brick, I don't think it's "necessary". I'll probably hit 28-29k Firestrike graphics with it and I'm already getting 26k without it. I'm expecting just a 10% improvement. It'll be in cpu and gpu intensive scenarios where the 330w brick will really do well but real world use cases with those are rare.

That said, either LM or lapped heatsink + carbonaut is a necessity as paste will cause thermal throttling even with cooler boost.

 

Bad news, the GS75 is not accepting the input of the 330W adapter.



@GenTechPC @Kevin@GenTechPC @ryzeki

@Meaker@Sager any thoughts?

 

Machine has power cap by its EC firmware so it cannot accept anything higher than the designated wattage of 230W. If an unlocked EC firmware is available then this is possible, otherwise it's not.

 

I was thinking that the ID chip of the adapter might be the culprit behind this rather than the laptop's EC as the GS75 has been happy to draw as much power as it needs till the 230w adapter's protection circuitry trips and shuts down.

 

Since you have the 330W on hand, do you have a power monitoring device to verify how much it's actually pulling under max load?

 

That's the issue see, the 330W adapter doesn't charge the GS75 at all.

After I plug it in the laptop is still on battery.

 

I see, what's the spec on the sticker? Use a voltmeter/multimeter to measure the output connector to verify if there's any voltage.

 

Yeah this is about the first step to check.

Also just for the heck of it, confirm the voltage on your stock 240w PSU so see if the 330w is outputting the same.

The only limit you could have is drawn power - as Kevin said, the EC does limit power drawn so maybe the 330w won't be doing much without modifying it. This was an issue we had to overcome when NOS was first introduced in GT60 - it drew 180w from the PSU and the rest from the battery. And this behavior remained even if using a higher wattage PSU.

 

Does the 330w for use with MSI laptops contain ID chip as Dell's adapters (middle pin)? I thought MSI instead cut max allowed power with the firmware.

 

They cut max power allowed. As far as I know, they don't use ID. I hope they never do.

I also hope they never use weird, non standard connectors. I sometimes wanna punch my lenovo.

 

Both are specced 19.5v. I'll test with a voltmeter later.

 

If it comes to that I'll ask svet from msi and see if he can do anything about it.

 

I don't think you can go outside the power cap introduced by MSI's engineers. Not even with Svet's mods. Maybe bro @Falkentyne can enlighten the topic.

 

On GT73VR and GT75VR, max power allowed was determined by the video card detection on system power on.
GTX 1070 limited system draw to 230W. Going higher than 230W would force throttle the CPU.

GTX 1080 limited system power to 330W (GT73EVR / Non SLI EC (17A1EMS1.112), or to an unknown higher value on SLI supported SKU's and EC (17A1EMS1.108, 17A1EMS1.109), and on GT75VR.

The total system draw of 1070 systems could be increased to 330W+ by using RW Everything and increasing the value in EC RAM location "E3" by one point on some SKU's, or setting it to 91 (GT75VR, GT73VR 7th gen). This is useful for GPU TDP mods. For 6th gen GT73VR, the values are 10 and 11 for 1070 and 1080 in EC RAM register E3.

I know absolutely nothing about GT75 Titan, but I'm sure there's a similar trick.

I know absolutely nothing about a laptop refusing to use a charger. Do these new laptops require some sort of dual charger dongle at all times?