AMD Radeon RX 7900 XTX and XT Smart Access Memory Performance

Gameplay Performance

We are going to look at each game and compare 4K performance, 1440p performance, and Ray Tracing performance at both 4K and 1440p, as well as FSR at 4K. This will provide an in-depth look at two resolutions, Ray Tracing, and FSR in regard to AMD Smart Access Memory Resizable BAR performance. We are using an AMD Ryzen 9 7900X CPU and X670E chipset for the full synergy of AMD Smart Access Memory on Radeon RX 7900 XTX and XT video cards.

Call of Duty Modern Warfare II

Call of Duty Modern Warfare 2.0 was released on October 27, 2022, on the PC and uses the IW 9.0 gaming engine. The game supports all upscaling methods, including NVIDIA DLSS, NVIDIA Image Scaling, AMD FSR 1.0, AMD Fidelity FX CAS, and Intel XeSS. We use the highest quality option of each. We customize every graphics setting to the maximum value for the best image quality and enable everything. We use the built-in benchmark.

Starting at 4K we are running maximum game settings in Call of Duty Modern Warfare II. On the Radeon RX 7900 XTX AMD Smart Access Memory (SAM) allows a 9% performance boost versus without the featured turned on. That brings performance from 110FPS to 120FPS, certainly a big enough jump that it would affect how the video cards line up next to the competition. The Radeon RX 7900 XT with SAM ON is 7% faster. We actually see bigger results when FSR upscaling is being used. The Radeon RX 7900 XTX is 11% faster with SAM ON and the Radeon RX 7900 XT is also 11% faster.

We actually see a bigger jump in performance at the lower 1440p resolution, which would be more CPU limited. Here the Radeon RX 7900 XTX is 15% faster with AMD Smart Access Memory turned ON versus OFF. The Radeon RX 7900 XT is 13% faster. These are pretty decent performance boosts from just flipping a simple option in the BIOS, free performance.

F1 2022

F1 2022 was released on June 28th, 2022 on the PC and uses Codemasters Ego engine.  The game supports Ray Tracing, DLSS, AMD FidelityFX, and FSR.  We are going to run the game with the highest quality settings of “Ultra High” and TAA+FidelityFX.  We will enable DLSS and FSR as needed at the Quality setting for both.  We will utilize the built-in benchmark in the Imola track, in dry conditions with a far-chasing cam.

In F1 2022 at 4K and maximum settings the Radeon RX 7900 XTX is 6% faster with AMD SAM turned ON and the Radeon RX 7900 XT is 5% faster. Once again we see bigger results with FSR, the Radeon RX 7900 XTX is 10% faster and the Radeon RX 7900 XT is 8% faster.

In this graph, we have turned on Ray Tracing at maximum settings at 4K, which is going to be more compute-intensive. We see smaller gains, the Radeon RX 7900 XTX is 2% faster with SAM ON and the Radeon RX 7900 XT is 3% faster with SAM ON. We do see bigger gains with FSR, the Radeon RX 7900 XTX is 6% faster with SAM ON and the Radeon RX 7900 XT is 5% faster.

Now we are looking at 1440p raster performance. The Radeon RX 7900 XTX is 9% faster with SAM ON and the Radeon RX 7900 XT is 8% faster with SAM ON. It seems the lower resolution benefits more from SAM than the higher resolution.

Now in this F1 2022 graph, we are running 1440p but with the highest Ray Tracing enabled. We see less of a difference with Ray Tracing. The Radeon RX 7900 XTX is 5% faster with SAM ON and the Radeon RX 7900 XT is 3% faster. It’s less of a difference, but still a difference nonetheless.

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