I have a Radeon VII that i bought off AMD website. At first everything was ok, but then i started to see these quick flashes of black lines on my desktop. Then i started getting hard crashes in destiny 2, division 2 and anthem. It even happens randomly while browsing Chrome. Its at stock settings. It can pass Heaven and Superposition on extreme settings for stability. My driver is up to date. Power limit is highest it can go. Idk what to do..
It took me a while to work out my crashing issues, I believe it was Temperature related. You need to undervolt the card. I keep mine at 50mhz on gpu and memory over stock and undervolted to 1000mv. Been working good since.
I thought it was too. I was undervolted to 1065mv and crashing happened still (although was overclocked too). I have taken the overclock off and it seems stable. Have not had a crash in division 2 since even after like 5 hours playing. Temperatures dont seem that different though. Im ordering water block for it anyways so if its temp related ill be fine.
There are a few things to take into consideration. First is the PSU. You didn't mention system specs. These GPUs really do use upwards of the 300 watts specified. If you factor in the system load from the CPU being busy, the PSU can get overloaded. I use an EVGA Supernova 850 and in heavy game stress I see my UPS reporting near 600 watts of power. And I am not sure that there are not peaks that the UPS is not reporting. I probably wouldn't use anything under a 750 watt PSU.
The Radeon VII can run hot depending on the load. I've noticed that some games, such Assetto Corsa and Project Cars 2, really stress the card. Even an older game, Two Worlds II, seem to want to thrash the GPU. I had to lower the frame rate on Project Cars and Assetto to 100 FPS to keep the GPU from hitting 100C and higher. It appeared that once the temps were 109C and more the GPU became unstable. On the other hand, Forza Horizon 4 runs at a high FPS and is not as hard on the GPU. I attribute it to game design. FH4 has an option for "unlocked" frame rate. The FPS value varies constantly without the GPU running at 100C or higher. Check your games to see what they have to offer, YMMV.
In Adrenalin there is an option to lower the frame rate per game. You can try lowering your problematic games to 60 FPS and see if the system becomes stable. If a lower FPS resolves the problem then you either have a heat issue or a power issue. If you do get a stable system, try increasing the frame in increments of 10 to try and find a sweet spot.
I use the manual frequency/voltage option to get the best frequency at the lowest voltage. The Auto Undervolt option did not work so well for me. I was able to get a clock of 1870 Mhz with a voltage of 1093 mV. Again, many people are reporting different frequencies and voltages so YMMV. But you really can get some heat savings by finding the right frequency/voltage combo.
The first question is more easily answered than the second. What I experience on an under volt that is too low is having both monitors go black and within seconds the sound from the game stops. No way to do a soft recovery from this. Use either the reset button or a power-cycle. So the answer is yes, it was a system lockup but with black displays. I have not had much success going with a clock greater than 1870. I thought I was okay at 1901 but the GPU eventually crashed and I would need to raise the voltage too high, causing more heat. I do see a gain from the default (stock) settings versus the 1870 clock using Unigine benchmark. Incidentally, I leave the memory and fan on automatic. I have never needed to manually raise the memory speed.
As to the stock voltage, that I am guessing at. Upon doing an install from a clean uninstall using DDU or using the Adrenalin Clean option, the card always has Manual for the clock/voltage. Without going through the process again, I know it was at least 1120 mV and a clock of 1801.
If you suspect you are having a clock/voltage issue, use the Reset feature on Global Wattman. That should put you back to the defaults. If not, try using DDU and then a clean install and then check Global Wattman to see what the clock/voltage is. If I was having frequent crashes I would go to the default and then check the game FPS. Try using Wattman to lower the maximum FPS for the game. That also brings up something I discovered by accident. I one of the games there is a FPS limiter. I set the limiter to 100 and the game FPS display showed 100, but the GPU was still running hot, well into the red. Then I used the FPS control in Wattman for that same game and got a much cooler GPU, and did not notice any visual loss, and the game FPS display still showed 100. Crazy, right!
One final thought. My GPU was rock solid in Unigine, so I thought I had a good clock/voltage setting. But using some of the games proved that to be wrong. It could have been a heat issue, but I had to settle on a lower clock/voltage (the 1870/1118). That seems to be a winning combination so far. The machine played several hours of Forza Horizon 4 this evening and no lockups.
Well now im kind of curious if it might have been my cpu overclock. I was running 3.8ghz on my ryzen 7 1700x, and i was having absolutely no issue. Then i decided to push it up to 3.9ghz at 1.375v. I suppose it could be possible that i was crashing due to that. So i am currently testing with my cpu at stock settings and a simple undervolt on my Radeon VII. I will update with any information i have.
I'm overclocking my Ryzen 7 1700 @ 3.9GHz on an AIO and I never have issues, I could do 3.7GHz Stable on the Wraith included. I don't believe overclocking your CPU is the issue unless your Thermal Throttling. Mine is 1.375V as well. The 1700X should have no issue pulling that off.