Different games, maybe different maps and i7 920 vs 2500k can lead to differences in results. This is NOT a critic to how W1zz benches, since I think a hevily OCed 920 is closer to what most people have and is in no way a bottleneck. But differences are going to happen with different systems and Sandy Bridge and SB-E systems are undoubtely faster and maybe, maybe a faster system helps the card with the lower mem badwidth get a few extra %. I also think that excluding some games with CPU bottleneck in W1zz's review would yield a greater difference and this is again NOT a critic, since it's only reflecting the reality of current gaming. But it can explain the difference.