Well my experience with my (admittedly Vega 56) card is to do what I said, even though itās under water. It doesnāt run fully stable on the 64 LC BIOS so I am running the 64 air BIOS (this one in fact is the best I have tried so far: https://www.techpowerup.com/vgabios/194442/amd-rxvega64-8176-170719-1 ) and undervolting while maximizing the power slider gets me the best performance period. When I raise the base voltage, the only thing that goes up is the temperature andā¦ you guessed itā¦ power draw. I donāt get better framerates.
Do not be cheap with the thermal paste. Use āthin, easy spreadā as opposed to thick type. So say MX-4 over Kryonaut. Vega has a āhot spotā sensor that will thermal throttle your card if paste/block coverage sufficient. To my knowledge only GPU-Z monitors that sensor. It is very important if you want to get good stable clocks anywhere near the Vega Liquid version. On both my Vega 64s the āhot spotā tends to be about 8c higher at 1670 core clock, so 55c running at 1690ish boost clock.
I could get better āhot spotā temps with reseating blocks with more thermal paste (I used Kryonaut), but will not bother till maintenance time and with MX-4. I can run these cards at for 46 hours straight,100% load without temps going over 35c core, 41c HBM2 and 50c āhot spotā at 1650 core boosting to 1672 constant - rendering. Fluid does not go above 29c in 21c ambient room. However they have a 560 and 360 rads exclusively for GPUs at 60% fan speed as I intend to add a third card.
im running 2 360mm ek 40mm thick rads and im using 1 gpu 1 cpu. so i should be fine. and im gunna run the card vertical so ill gain more airflow. also. i have mx4 i was wondering if that is better the what ek sends
I also used Kryonaut, spread evenly with good coverage. I quite like it. This is my first custom loop but Iām addicted. I did have a whole thread on it while I was working it out: Full Loop with XSPC?
That is what I thought. But you cannot run the 64 liquid BIOS. The āhot spotā is preventing that. That BIOS drops temp limit to 70c and most likely starts to down clock at 60c.If done correctly, your āhot spotā should not be higher than HBM2 temps.
1100 memory is easy but I do not suggest going higher for everyday use. Benching only.
Sustaining over 1700 clocks you are best to flash to a 64 liquid BIOS or edit to get the extra voltage allowed.
Your āhot spotā temp will be very important to do that.
Note I am speaking gaming. Compute is easier to sustain clocks than gaming. Vega is a compute card that can be used for gaming.
Max I saw was 57Ā°C, HWiNFO hot spot matched GPU-Z. Whereās the evidence that hot spot should match HBM2? I hadnāt heard this before, and have only really known that the hot spot needs to stay under 80Ā°C before itāll throttle, same with HBM before timings loosen and performance drops.
I agree about compute, rendering doesnāt heat things nearly as much and clocks are dead solid.
I have a 280 and 120 in a not-great-airflow case (S340 Elite) but really itāll matter on loop saturation Iād imagine.
Even with the liquid BIOS it never went near 70Ā°C. Iām pretty sure itās just the chip Iāve got, as it drank plenty of power but never got any more performance past a certain point (about 1660MHz is what itāll do stable on any BIOS - not all 64ās work either).
I still havenāt seen anyone else say this, I just want some confirmation.
Who are you talking to? Type @ infront of name to talk directā¦
I have a 560 and a 360 just for GPUs, so 7 fans to your 6, but two GPUs. So if you are single GPU and all other things equal, you should have better cooling. But real world you will only be able to run your fans at lower RPM because I am already passed cooling area required and 70% fan sustains temp for two days. I could even go 60% and stay at 29c water temp, but my fan curve wonāt allow it.
What I mean is, hot spot temps need to be around HBM2 temps at the clocks you have in order to get the Vega 64 liquid clocks. That is why the liquid BIOS is unstable on your card. The hot spot will be higher than HBM2 but at the lower clocks we are talking about the hot spot needs to be around HBM2. Am I explaining this right?
We both installed the same way with the same paste and our hot spot temps are within 5 or so degrees. We did it wrong.
At 1640 average clocks I was getting hot spot temps of 53c max. I pushed my cards to get a 1660 average clock and my hot spot was getting to thermal throttle territory for a liquid BIOS.
So pushing even higher I would have crashed a 64 liquid BIOS, as my hot spot exceeded 70c. Donāt mind the GPU core temp, my furnace was running and blowing right down on PC which dramatically effects core temps. I close furnace vent when rendering or gaming. Actual temp will not exceed 38c.
