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Sapphire HD4890 Vapor-X 2GB
Crysis: Warhead: By now, everybody who is anybody knows about Crysis, and its sequel, Crysis: Warhead. It's a brutal test, and it's also my favorite. For this test, we run several different resolutions and AA settings, all at the Enthusiast setting with DirectX 10, and graph the results. I also figured that Warhead would be the best test to analyze the advantages of 2GB of RAM in detail. So, I took the Sapphire 1GB Atomic Edition and clocked it to the same clocks as the stock Vapor-X 2GB. So, at 870MHz on the core, and 1050MHz on RAM, this comparison should tell us exactly how much the expanded memory capacity really helps. As such, I would expect the performance to be near identical at the lower settings, and a gap should diverge as the memory usage exceeds 1GB. What did we find?
Click picture for larger image What we found is that the extra memory provided little help until we reached an exceedingly high resolution and AA setting. At 2560x1600, with 4xAA, we see a slight divergence, particularly with minimum framerate, and then at 8xAA, the divergence significantly widens. At 4x, the average framerate of the 2GB card wins by ~4%, but at 8x, that percentage changes to nearly 103%. There is also a small boost at 1920x1200 at 8xAA, however this is still only a 1.4% gain. All other settings netted less than 1%. What would really be interesting to see is how comparable Crossfire configurations would fare.
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