I got the same card and I get about the same performance in cysis as you but it comes down to the cpu. You have to overclock to get decent performance these days on any card even a 6 core cpu needs to be nuked due to the poor quality of software these days.
hmm..but what about games which performed better b4 on my 8800gt? for eg i was just tryin GRID which ran very well on the older card..but on this its barely giving me 30fps with barely any settings on high..
and i got a 3dmark Vantage score of P9342 !! whereas its much higher in the benchmarks im seeing online.
cud it be my PSU underpowering the card? its abt 2 yrs old..cud it have degraded by that much?
i just hv 2 hdd's and a fan attahced currently.
or is windows 7 x64(clean install just recently) the problem?
i had a similar problem. My gtx 460 was getting a 3dmark of 9000 also. My friend suggested moving my graphics card to a different pci-e slot. I moved my card up a slot and uninstalled my drivers with driver sweeper in safe mode. I installed the latest drivers and now it runs very smoothly.
I don't know why it worked maybe it was something with my motherboard but I guess its worth a shot.
It maybe a bottleneck issue? I want to say no but I'm not an expert in this subject so don't quote me on that.