Comparison reviews

Compared with FP16, AMD’s FidelityFX super resolution is only 7% slower in FP32 mode

If you are not the owner of one of the newest and greatest Best graphics cardAnd don’t worry: AMD FidelityFX Super Resolution It can still increase your frame rate and run almost as efficiently as on modern hardware.according to CapFrameX on Twitter, Compared with FP16, running FidelityFX Super Resolution in FP32 “backward compatibility mode” only incurs a performance cost of 7%.

CapFrameX uses SciFiHelmet, RX 6800 XT, 4K resolution and FSR Ultra Quality presets to test these two modes. Although RX 6800 XT does have FP16 and FP32 functions, you can manually change the code of FSR to run FP16 or FP32.

Especially for RX 6800 XT, the performance difference between FP32 and FP16 is only 7%, which is very small, which is good news for users of older graphics cards that do not support faster FP16 code. But please keep in mind that this test is only based on RX 6800 XT and does not necessarily represent other GPU architectures, so you may see different results for other graphics cards.

(Image source: Twitter)

FP32 is called single precision floating point, while FP16 is half precision floating point. For many years, FP32 has been the standard format for GPU operations, but some operations have not benefited from the increased accuracy and can run faster in FP16 mode-assuming the GPU supports fast FP16 mode. Basically, FP32 allows larger numbers than FP16 and is useful for more complex workflows. However, FP32 requires twice the memory bandwidth and is not necessary in certain workloads.



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