MODDED BIOS TO UNLOCK OVER-VOLTING:
http://forum.techinferno.com/asus/7072-prema-mod-gtx860m-vbios-g750jm.htmlNOTE: 1200mv is the likely limit for over-volting. On Clevo overcocked edition appears to have this as its stock spec. So do NOT go over 1200mv for the time being.
OLD VERSION ASUS TOOL THAT LETS YOU CHANGE VOLTAGE:
http://de.pcdrivers.guru/asus-gpu-tweak-for-laptops/download-675767.htmlSorry for starting a new thread on this, but the other ones I read were off-topic with lots of posts about other laptops and other GPUs. Keep all posts on point, and please only post if you own a G750JM with 860M, and want to know more or have valid advice from experience with this laptop specifically. This laptop is a great value, and with some tweaking can perform extremely well while running nice and cool.
I just picked a G750JM up off of craigslist for $660 USD. There is about 4 months warranty remaining so I figured I would mess around with the overclock settings for a spell :cool:
All results on are Windows 8.1 with 8GB RAM and the unlocked BIOS posted above, on table top with battery fully charged. Room temp is 68F (19C). Driver is NVIDIA 9.18.13.4475, which is maybe the last one before they took out the ability to overclock. Hopefully that comes back soon, from what I am reading it will be back on the next release.
Right now, I have the GPU set to 1200mv, 1400MHz clock speed, and 3100Mhz Memory speed. Stable so far, running at 68 C with the fan on high during stress tests. I read one user had his stable at 1200mv so I kept that as my max voltage while seeing how high I could clock it. Over 1420 / 3150 and it crashes so I have it at these values now and it is stable.
I am using Asus VGA Tool to overclock, and GPU Tweak ver. 105, with over-volting option, to double-check and keep fan set on high. Furmark to stress test while changing values, 3DMark to get benchmark.
My 3DMark11 GPU score is 6406-6425, so significantly higher than stock of 5000-5050. This is on Performance mode 720p at default settings. I ran the 4 graphics options and left the other ones out to get straight GPU score.
I am playing Assassin's Creed Rogue on 1080p, all high settings with 60+ FPS. I will try to get more accurate gaming FPS comparisons between stock and overclocked. My main concern right now is whether I am risking frying the GPU. If so the trade-off is not worth it, even if I did get a free replacement.
As for CPU (Intel I7 4700HQ), I left the frequencies alone, but lowered core and cache MV by 90, and lowered max Turbo Short Power to 54.5 and Max Turbo Power to 42.5W using Intel Extreme Tuning Utility.
What do you think? Should I stop? Keep going? Is 1200mv too high in your opinion? What would be a good max voltage? Thanks for your input and results.
Also, while we are discussing modding, I removed the DVD drive and I can feel air being sucked in through that empty port now. Laptops should have all air intake on the sides, and all output upward out the back. That way, it won't cook you if you actually use it in your lap like I do
🙂 Temp dropped by 1 or 2C, and it feels cooler in my lap. I also tightened all screws I could find, they were all a little bit loose. Might re-paste if it seems other users are running cooler than me. CPU stresses at 78C, GPU stresses at 68C, those are my averages.