SuperMG

Hello. Same height. No difference

Thanks a lot for telling me how to undervolting. I tried without GPU, without copper plate. Only CPU. Managed to get the "famous" 40c to 99c. Screws 3 and 2 at max torque. Screws 1 and 4 at 70%. Even without a copper plate and a x-bracket with the RTX 4070, I managed to get the 40c to 99c on the CPU. I need to cut some aluminium on the heatsink where the R22 inductor is touching. Because this component is taller than the GPU's die and can mess both CPU and GPU temps (because die doesn't touch)

I still get the same issue with the copper plate installed. I installed it correctly before it wasn't installed correctly. I had to cut the plate so it can fit flat. VRAM pads are ok now. Still peaks at 99c when being at 35W I touch the CPU side, it's not even hot, the vents have cold air. The GPU temps don't even go at 99c. Max is like 80c but when at 115W 100%. The GPU temps are like 27-30c idle. No weird spikes on the GPU side. When I insert an USB key, CPU spikes at 99c... I'll try 0.8mm thick and 1mm thick copper plates in 2 weeks. 1.2mm is probably too much. Because I have the NV-A heatsink and it doesn't even touch the "tall" R22 inductor, like there's a 0.2-0.3mm gap "visually". On the NV-B heatsink (old 7720), 0mm gap. Need to cut impossible corner. I want to try undervolting at -100mV but it's locked of course and I have the latest bios. FurMark 1.37: RTX 4070 MXM, 116W max, 79C max, 205 fps AVG 1080p

I removed the copper plate and used the previous Dell Precision 7720 where the Quadro P3000 and 4070 with the custom heatsink had weird CPU temp spikes issues. I removed the copper and added the M1200 because the P3000 was somewhere else. And now the CPU doesn't act up! It's not doing 40c to 99c. Or doing 99c at 35W! I'll test further more. Edit: no problems with unmodified heatsink (removed copper plate) on both Dell Precisions with P3000 and M1200.

I don't know, the CPU doesn't seem hot. I feel the wind on my hand, it's cold. If it doesn't do good contact, how is it possible for the CPU to cool down? Visually with the other heatsink with the copper plate, I see that they're aligned good, like on line between the CPU and GPU parts. Like there's some sort of an elevation gap Let me remove the copper plate on the other heatsink and test it with P3000

Yes it does show contact. My modification is just to add one piece of 4cmx4cmx1.2mm copper plate on the GPU's section. I did the same modification on the newer heatsink, same issue I think? There's good amount of pressure on the CPU, I can't do that far. This happens on two different 7720 laptops. 6920HQ and 7820HQ

Hello. I bought 2 Dell precision 7720. One was with a Quadro P3000, working fine, until I put the RTX 4070 MXM. I modded the heatsink so it has a good contact. The CPU temperature reading are WTF. When the CPU or GPU is doing something, the CPU is pegged at 99-100C. With PTM 7950 and cleaned vents... When I insert back the P3000, same issue. So I bought another 7720 with M1200. M1200 and CPU works fine. Then I reuse the modified heatsink with the RTX 4070 and I get the same problem, CPU temperature readings from 40c to 99c in an instant... Does random spikes at 70-80c in idle too... Windows 10 and 11 fresh copy. When I remove the MXM GPU, the CPU no longer reaches 99c. Is this a heatsink problem or is this an RTX 4070 MXM problem? The RTX 4070 stays cool at idle and no random spikes. Did anyone get this issue before?

But the price is so cheap too... If I was able to manufacture one of these, it'll cost me max 180€.

Thanks. Can't they sell it on Alibaba/Aliexpress? Taobao is so limited and you're right. The OEM heatsink is cool too. But I don't have the right software to cool with the fan. The GPU fans never boost.

@Drimacushello, where did you get that heatsink? I had to modify my own laptop casing just to cool the RTX 4080

News, so the i9 9900KF with the bios I uploaded works fine on dual channel. So yes, it was indeed a pressure issue from the lga bracket.

I 100% think it's coming from the pressure with the lga bracket. But sadly I don't have the right "3rd screw" and the OEM one doesn't even stay with the BGA1440 CPU (it becomes a projectile). So I'm gonna sell this CPU and get myself a cheap i9 9900KF for 180€. CPU works fine with the bios I uploaded but dual channel didn't work due to the lga bracket.

Was your bios limited to 2133MHz max or was it in auto? 3/4 doesn't work. 1/2 doesn't work But 1/4 works for example, it's single channel still, and I set everything at 2133MHz. Only the normal i7 8700 I have works with dual channel.

Hello. Everything is normal, flat but still doesn't work for dual channel

Well, I used another screw mounting for the 3rd point because the Clevo one can't hold the pressure and goes off. So the lga1151 bracket is a little bit on the top on another side but the CPU is secured, doesn't move. Thanks for the tip, I'll see if can shorten the another screw mounting I got. The thermal paste application looks alright too. CPU scores 525 single core and 5000 in multi with CPU-Z bench