RX6800XT experiences stability problems with high CPU load but runs smoothly when GPU is idle.
RX6800XT experiences stability problems with high CPU load but runs smoothly when GPU is idle.
Hello, Tech Tippers To give some background, recently my RTX 3090 decided to crap out, no video out, not being detected in windows on multiple systems During the meantime of RMA'ing it to EVGA, I've decided to drop in a RX 6800XT that I had laying around to hold me over, but lord I'm struggling Right out of the gate feature wise I was aware I would be losing g-sync, and ray-tracing but come to also find out that I also lost the ability to have windows run 120hz refresh rate to my main monitor an Alienware AW3418DW(I'm guessing this is tied to g-sync) However, the biggest issue is the severe downclocking the RX 6800XT is doing at low gpu usage where the core frequency would drop as low as 80hz! These frequency drops has resulted in a choppy experience with anything that isn't putting load on the gpu. Which is driving me frankly nuts having 1080p youtube playback suddenly drop to 240p, choppy retro emulation, and desktop usage (it's choppy as I'm writing this post as well) GPU temperatures are fine 52-75 degrees idle-load As I became aware the frequency is closely tied to gpu usage as when I put actual load on the gpu it runs like a dream with stable advertised boost frequency Using HWinfo to monitor the gpu core frequency, and I've set the min frequency in Adrenalin -100hz from max boost frequency, used MPT to disable the lower power states to ensure the gpu would stay in P1, also used DDU in safe mode removing the previous nivida drivers and AMD drives as I've initially suspected driver issues and did some clean reinstalls of Adrenalin and checking the GPU manufacture site and the vbios collection on techPowerup and couldn't find an newer vbios than whats on the GPU currently, re-enabled re-bar support as my mobo disabled it when I swapped out my 3090, and did multiple power drains on the system (removing system from power and holding the power button in for 5-10secs then plugging it back into power and then turning the system back on) I guess, at this point I would like to know if this is what the average experience is for modern AMD graphics so that AMD can come out and say "Oh our new gpu's are more power efficient then nvidia b/c we aggressively throttle the gpu power at idle or low load" as I've been using nvidia as my main gpu vendor day 1 so was kind of looking forward to seeing what AMD was bringing to the table to compete with nvida. But it seems like to me that all the memes I've seen bashing AMD had some truth behind them My system is as follows: CPU: I9 10900X OC'ed to 5GHz Memory: 32gb 4x8gb G.Skill Trident Z 3000MHz Mobo: Asus Rampage VI APEX with latest bios PSU: Corsair HX100i GPU: Yeston RX 6800XT 16GB
Radeon Chill in adrenalin software might assist with this problem too. Trying a stable base FPS that feels smooth and adjusting the maximum as needed can help. I’ve also noticed improved performance by using enhanced sync in games like RDR2, which appeared to resolve the same issue you mentioned.
Based on the updates, results have become more reliable in scenarios with limited GPU power, and the system has been restored to its original settings (re-enabling c-states on the GPU).
Avoid using Radeon Chill—it's a setting that often causes more issues than benefits in many games or situations.