Comparison of XFX Speedster MERC308 Radeon RX 6600 XT BLACK Gaming video card vs ASUS ROG Strix GeForce RTX 3090 GUNDAM EDITION video card by specifications and benchmarks. XFX Speedster MERC308 Radeon RX 6600 XT BLACK Gaming runs at 2.188 GHz+ 11 % base clock speed and has 8 GB of GDDR6 memory, while video card ASUS ROG Strix GeForce RTX 3090 GUNDAM EDITION runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 160 W, and the second is 390 W+ 11 %. Compare the table of benchmark results to find out which graphic card is better.