RX Vega 56 not running at full speed

[Dragon155]

Hello all,

I recently built a system for my brother, with a ryzen 5 2600x, 16gb of patriot ddr4@3000mhz, and a RX Vega 56 GPU. Of course the first thing I do is run a couple benchmarks, Unigine Superposition, unigine Heaven, and I noticed a trend pretty fast. First time I ran Superposition, the gpu (red dragon) was running about 1550 on the core, with around 70C temps, not bad, second time I ran it, the core stayed around 1350, third time I ran it, core went down to about 1250mhz. It used 280Watts on the first pass, and was locked down to around 188watts in the 2nd and 3rd passes. I rebooted in both bios many times, and I am on a 650Watt power supply, and installed the newest Vega 56 drivers. Any help would be appreciated!

Thanks!

 

[norcalsc]

try running the DDU download in SAFE MODE. then select the option for installing a new GPU and power down. boot and reinstall AMD drivers from AMD website. do you have frames capped somewhere? like riva tuner?

 

[Karadjgne]

What were the temps on 2nd and 3rd pass? The gpu will downclock if it thinks it's overheating

 

[Dragon155]

Second and third pass were mid/low 60’s as the card was downclocked like that. Ran many passes of valley benchmark, no change, low clock, low temps, low power. I’ll try installing the new driver tomorrow when I have access to the PC again. Also frames are not capped, I have monitor opened to 144hz.