We have our first custom retail AMD Radeon RX Vega 64 GPU video card on the test bench in the form of the ASUS ROG STRIX RX Vega 64 O8G GAMING video card. ASUS has created a robust ROG STRIX version of RX Vega 64 with a factory overclock and overclocking ability in this air-cooled monster. Let’s see what it can do.



It is very important to note the real-time clock frequency with Vega 64. Keep in mind that the upper number is a boost clock number and unlike NVIDIA boost clock does not mean you will hit or exceed this number. Think of the boost clock with AMD GPUs as a "theoretical maximum" number that you can achieve, but you most likely won’t. AMD clock speeds work very different than NVIDIA clock speeds, so forget everything you know about GPU Boost with NVIDIA GPUs in regards to looking at clock speed with Vega GPUs.

Note that a newer GPUz is out compared to the reference review six months ago, this new version 2.7.0 can read the clock speed sensor correctly in relation to real-time frequency more granular than it did previously, so the clock speed cannot be compared to previous versions of GPUz from six months ago.

Keep in mind that the base clock on the ASUS ROG STRIX Vega 64 O8G GAMING is 1298MHz, so that is where we are putting our red line. The GPU boost clock is 1590MHz, so that is where we are putting the green line. From ASUS’s own estimates the clock speed should average around 1458MHz, so let’s see where it ends up in our testing.

GPU Clock over Time

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In the above graph you can see the clock speed has a minimum of 1427MHz, so it never drops to the base clock frequency or below, which is very good. The maximum frequency it hits is 1514MHz briefly, so it never actually reaches the boost clock of 1590MHz at all.

This is typical and normal for Vega GPUs and how the clock speed operates. Though the highest boost clock is set at 1590MHz, you won’t actually hit that clock speed sustained, which is why it is a little misleading with Vega GPUs when you report the boost clock. This is why it is very important to do testing like this and note the real-time frequency while gaming.

The average clock speed works out to 1468MHz. This is actually slightly higher than ASUS says it should be running at, so we know our video card is right in-line with ASUS and performing just slightly better than predicted. This means an improved performance over reference Radeon RX Vega 64. We are off to a good start with this video card.

Temperature over Time

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Here we are looking at the temperature of the GPU over the course of that gaming. You can see we hit a maximum of 76c while gaming on this video card. The average is around 70c. This is much improved over the 86c the GPU hits on the reference AMD Radeon RX Vega 64. The ASUS STRIX cooling is really showing off here, and proves to impress.