8800 GTS max oc g92 sli vs 9800 GTX+sli on q6600 3.4ghz

how big of a difference will a 9800gtx+ sli be compared to a 8800gts g92 sli oc to the max be on a q6600 3.4ghz. I made another build but got a 8800gts g92 for only 120 bucks brand new evga price after rebate. so that was a good deal i couldnt pass but when i went to find another 8800gts its like $180 bucks and thats a S$&# load that i dont want to spend, i was thinking i should have just went with a 9800gtx but the 8800 gts was such a great deal. but anyways how much of a difference would those two be if they were maxed out overclocked. and the heat or power consumption differ. I cant find anywhere that ive search to see a price that i want for an old 8800gts g92 at a reasonable price for me i would like brand new 150 bucks but everywhere is soo expensive can somebody tell me where i can find really cheap 8800 gts, I play at 1680x1050 22in, wants to play crysis max

They both use run on identical g92 gpus with 128 sp. It all depends on which one is clocked higher. Both are 65nm, and overclocks the same (identically binned chips). At stock, 9800gtx is 675mhz, compared to 8800gts's 650mhz. Although the extra 25 mhz merely eats into existing oc headroom.

When clocked the same, 8800gts slightly outperforms 9800gtx due to higher efficiency.

http://en.expreview.com/2008/04/03 [...] ew.html/12