undervolted and overclocked in-depth look at Vega 64 by Alexander Brose
Sapphire RX Vega 64 Nitro with Bykski SP-VEGA64-X water cooler
Open Loop, 240mm + 360mm Alphacool Radiators, 5xNoctua P12 Redux @ 750 rpm
Software: Windows 10 1909 / Radeon software 19.12.2 / MSI Afterburner 4.5.0 + RTSS 7.1.0 and HWinfo 6.2
HBM Tweak Tool and Wattman or OverdriveNtool
Undervolting has two options: Either you save electricity (same performance as factory settings with lower consumption) or you gain performance (more clock with the same consumption as with the factory settings). If you combine both options and optimize the storage at the same time, you can already increase performance and reduce consumption at the same time. However, the decrease or increase in performance always balances to a certain extent with the decrease or increase in power consumption. Undervolting turns Vega into a significantly more efficient (or even faster) graphics card - but you cannot make it a “power-generating 1080 Ti killer” either - Alexander Brose
Undervolting by 100mV brings 2-7% more FPS and 0-10% less power consumption .
The Wattman power save mode costs 4-15% FPS, but brings 10-20% less power consumption.
Undervolting + overclocking brings 2-9% more FPS and 12-19% less power consumption .
Maximum overclocking brings 8-16% more FPS, but leads to 9-27% higher power consumption .
The "sweet spot" brings up to 5% more FPS and leads to 22-27% lower power consumption.
Google Translate - https://translate.google.com/transla...lbstversuch%2F
Chart done by 3Dcenter.org
In the end, the Radeon RX Vega 64 used is then quite flexible: it can be converted into a (relatively speaking) energy-saving graphics card, where roughly the default performance is + 55% higher energy efficiency (only calculated for the ASIC) . In this case, the ASIC with an average of 168 watts of power consumption is a whopping -90W below the default setting; based on the entire card, this should mean a power consumption of around 240 watts - 3Dcenter.org