BFG 320mb 8800gts Vista64 framerate drop

[RastafariShenanigans]

I need some help choosing between 2 different videocards. My computer is a Quadcore AMD with a Biostar motherboard and 4gb ram. Right now I have a Geforce 8800 GS 256mb PCIe 2.0 card in there. I also have a 1st generation BFG 8800GTS 320mb card. Which one should I be using?

Thanks in advance for the advice!

 

[RastafariShenanigans]

Sorry for the double post, got another quick question to tack on to this that is related.

Would I have any kind of issue with the BFG 8800GTS 320mb and the PCIe Slot? Not sure if the BFG is PCIe 2.0. I know the motherboard is PCIe 2.0. I know this may seem like some really dumb questions to most of you, i have been out of the loop for a bit and some of this new stuff is a bit confusing for me.

 

[robx46]

use the 8800GTS for sure, definite better performer, hands down. Your mobo is fine, toss it in there!

 

[RastafariShenanigans]

Ok, so I swapped from the 512mb Geforce 8800GS to the 320mb Geforce 8800GTS and also went from WinXP to Vista64 (mainly so I could make use of the 4gb of ram since XP only sees 3)

Not sure if its suposted to be like this or not, but my frame rates have actually dropped

World of Warcraft went from avg ~40-50fps with the old setup, to about ~20-30fps with the new setup. All drivers and updates current. Am I doing something wrong?