dual 8800 gt vs 9800 gtx

[manchan]

Which is faster when it comes to running on high and 1920 x 1200 on Crysis ,Cod4 , Company of Heros and Half-life 2?

 

[dagger]

9800gtx should average around 15% faster.

 

[manchan]

15% faster than 1 8800gt or 2 8800 gt's?