Radeon RX 7900 XT Overclocked Graphs
In the graph above, we are first looking at the Front End Clock Frequency. By default, this should be running around 2400MHz, as per the spec. In reality, while gaming, it starts off pretty high, and then falls to between 2720MHz-2780MHz. This is the default behavior of the Front End Clock, which averages out to exactly 2755MHz without overclocking. Now, when we enabled the 3350MHz Max Frequency slider above, you can see how the overclock compares to this. It starts high and then settles between 2870MHz-2930MHz. The exact average of the overclock turns out to be 2907MHz for the Front End Clock. Therefore, on the Front End Clock, we got a 152MHz or a 5.5% increase for the Front End Clock. This is slightly more than we achieved with the Radeon RX 7900 XTX.
In this graph above we are now looking at the Shader Clock Frequency, which should run at around 2000MHz according to the spec. We can see, however, that while playing games it actually boosts to between 2520-2580MHz at default. The exact average of this clock speed turned out to be 2548MHz. When we overclocked the Max Frequency slider to 3350MHz we can see with the orange line how the overclock compares to the default performance. We now see the overclock for the Shaders around 2640MHz-2730MHz. The exact average of the overclock on the Shaders is 2693MHz. Therefore, the overclock has increased the Shader Clock by 145MHz or 5.3%. This shader clock is also higher than what we achieved with the Radeon RX 7900 XTX.
Radeon RX 7900 XT GPU Only Overclock
Just like the Radeon RX 7900 XTX, we could also achieve a higher GPU only clock speed if we did not overclock the memory at all. e went ahead and ran our tests to also find out what overclocking the GPU alone, without the memory would result in. In the table below, we are going to compare the GPU Overclocked Alone frequencies, with the GPU and Memory overclocked results we just showed above so you can see how much more you can eek out of the GPU if you don’t touch the memory at all.
| Average Clock | Default | GPU and Mem OC | GPU Only OC |
|---|---|---|---|
| Front End MHz | 2755MHz | 2907MHz | 2966MHz |
| Shader MHz | 2548MHz | 2693MHz | 2744MHz |
From this, you can see that if we only overclock just the GPU, where it is not as power throttled, the Front End Frequency can get up to 2966MHz average. We even saw peaks at 3GHz, which only lasted a few seconds, then it falls into the 2900’s. Still, with just the GPU overclocked the Front End has a 211MHz or 7.6% overclock. The Shader Clock has a 196MHz or 7.6% overclock. On average, the Radeon RX 7900 XT has achieved a higher overclock percentage than the Radeon RX 7900 XTX.
For our final results today, however, we opted for the balanced overclock where it is overclocked on both GPU and memory, so we settled for the results shown in the graphs above and the memory at 21GHz for our performance comparisons in the graphs to follow.
