Setup and test results …
MSI Radeon RX 6600 XT Gaming X 8G was tested on the following system:
ASRock Fatal1ty AB350 Gaming K4
AMD Ryzen 7 1800X
Crucial 2x4GB DDR4-2400
Software:
Windows 10 Professional 64 Bit
Unigine Heaven Benchmark 1080p Ultra Settings
Unigine Super Position Benchmark – 1080p Extreme Setting
3DMark Firestrike Extreme
3DMark Timespy
3DMark Port Royal
GPU-Z
We start directly with the Unigine Heaven benchmark and reach 2898 points.
We reach 5673 points in the more modern Super Position benchmark.
We continue with 3DMark Firestrike Extreme. Here, the MSI Radeon RX 6600 XT Gaming X 8G achieves 12070 points.
The fourth discipline is 3DMark Timespy, where we score 9221 points.
And finally (and on this test system for the first time 
) the 3DMark Port Royal Raytracing benchmark, where we reach 4378 points.
Additionally, we determine the maximum clock rates and temperatures via GPU-Z and the option “show highest reading”.
AMD RX 6600 XT temperature …
Across the benchmarks, the MSI Radeon RX 6600 XT Gaming X 8G boosted with a maximum 2604 MHz GPU and 2000 MHz RAM clock. Temperatures reached a maximum of 56°C GPU and 82°C hotspot respectively with very tolerable fan noise. You would definitely hear the card during gaming, but rather leisurely and not annoying.
AMD RX 6600 XT power consumption …
The GPU’s power consumption is 141W.
AMD RX 6600 XT Volume …
Another positive side note: the 0dB Zero Fan mode works excellently, so the fans stand completely still as soon as the temperatures allow it (idle or Windows operation).
AMD RX 6600 XT graphics card overclock …
After the benchmark round, we of course tested where the limits of the MSI Radeon RX 6600 XT Gaming X 8G are and further overclocked it with the in-house MSI Afterburner. The card reached the following maximum values: +4% power limit, 2750 MHz GPU boost clock and 2350 MHz RAM clock. With that, the MSI Radeon RX 6600 XT Gaming X 8G ran smoothly and we didn’t even have to adjust the cooling!
In the Heaven benchmark, we crack the next 1000-point hurdle and reach 3004 points.
We reach 5933 points in the Super Position benchmark.
3DMark Firestrike Extreme also benefits from the overclocking and reaches 12751 points.
The 3DMark Timespy also benefits from the overclocking, where we achieve 9541 points.
Lastly, the still relatively new 3DMark Port Royal again, where we can now improve to 4633 points.
Again, we determine the maximum clock rates and temperatures via GPU-Z and the option “show highest reading”.
Overclocked with our settings, the MSI Radeon RX 6600 XT Gaming X 8G boosted with a maximum of 2690 MHz GPU and 2346 MHz RAM clock. Temperatures reached a maximum of 57°C GPU and 83°C hotspot respectively while the fan noise remained very tolerable. The card only got minimally louder overall!
The power consumption increases to only 150W, but this is due to the only very low (because locked by BIOS) power limit addition of 4%. This will also be responsible for the fact that the GPU clock could not reach the maximum value set by us across all benchmarks.
MSI Radeon RX 6600 XT Gaming X 8G graphics card Result and general impression …