Performance and power consumption
To measure the effect of our tweaks, we have taken the top model of the air-cooled RX Vega and recorded results at several settings. We measured performance in both 3DMark and a few games while also recording the data for power consumption and how consistently the card can keep up the top clocking speed. The latter we look at more closely on the next page.
Without changing any setting, the score in 3DMark Time Spy is 7482 points while the voltage is at 1200 mV. The power consumption lies at 301 watts and the temperature reached 80’C. By raising the power limiter to 150%, the consumption becomes higher and the temperature rises but the performance does not improve any.
To bypass the temperature limiter, we raised the fan speeds to 100%, but even then there was no improvement. This is where we started to play around with the current. The 3DMark Time Spy runs stable at 1070 mV but the games do not run spotlessly yet. The stable game performance comes at 1090 mV, at the same point the 3DMark Time Spy score improves by 3%. The power consumption increases somewhat.
|RX Vega 64 @ stock||RX Vega 64 @ +50% PWL||RX Vega 64 @ 50% PWL + UV|
|3DMark Time Spy||7482||7480||7704|
|Hitman 4K ultra||61,4 fps||59,7 fps||63,6 fps|
|Rise of the Tomb Raider 4K ultra||42,8 fps||42,6 fps||43,6 fps|
|Spanning (P7)||1200 mV||1200 mV||1090 mV|
|Temperature||80 ºC||87 ºC||71 ºC (100% fan)|
|Power consumption||300,6 W||355,5 W||305,3 W|