Undervolting the AMD Radeon RX Vega: better performance at lower voltage

Higher clocking speeds at lower voltage - it works!

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Throttling test

Along with the performance and power consumption, we tested how well the card behaves in longer gaming sessions. As mentioned before, the clocking speeds on the modern graphics cards vary widely depending on temperature and power consumption. Without any changes to the settings, we get the RX Vega 64 to 1510 MHz. With a higher power limit, we see an improvement of up to 1600 MHz in the first few minutes, but then the temperature limiter kicks in and the speed drops to 1530 MHz.

While lowering the voltage, we see a completely different picture. The RX Vega 64 has no trouble keeping up the top speed of 1630 MHz for the full 30-minute duration of the test. Compared to the default, it is an increase of almost 8% with very little extra power being consumed.

Time RX Vega 64 @ stock RX Vega 64 @ +50% PWL RX Vega 64 @ 50% PWL + UV
0-2 min 1513 MHz 1605 MHz 1630 MHz
2-5 min 1502 MHz 1551 MHz 1630 MHz
5-10 min 1516 MHz 1543 MHz 1630 MHz
10-20 min 1510 MHz 1537 MHz 1630 MHz
20-28 min 1510 MHz 1530 MHz 1630 MHz

Compare

two products discussed in this review

  Product Lowest price

AMD Radeon RX Vega 56

Vega, 3584 cores, 1156 MHz, 8192 MB, 2048 bit, DirectX 12 fl 12_1, PCI-Express 3.0 x16

Specifications Test results Reviews

AMD Radeon RX Vega 64

Vega, 4096 cores, 1247 MHz, 8192 MB, 2048 bit, DirectX 12 fl 12_1, PCI-Express 3.0 x16

Specifications Test results Reviews

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