Upgrade Time for Mobo? Tips...

Hello, I have recently bought some new hardware for my rig.. xfx 9800gtx+ / 4GB OCZ Memory 800Mhz (2GBx2) / OCZ GameStream 700w PSU.

I have the ASUS P5NSLI mobo:
http://www.asus.com/products.aspx? [...] odelmenu=1

And I cant help but wonder if this mobo will gimp my new parts. And I really am not sure if I should upgrade it as well... or Ill be fine.
Things I have to point out of this mobo

1- PCIe slot, not sure what verison it is, and I read somewhere v2.0 PCIe cards dont work with v1.0 slots. But they work with v1.1/v2.0 PCIe slots. So im not sure this card will work in my mobo now, unless what I read was incorrect.

2- Memory speed, standard is 667MHz for this board and the new memory I bought is 800Mhz... I think I can OC the mobo to rise the Voltage and Timing to get it to 800Mhz... just not sure how.

3- Chipset, its an older nvidia 570 chipset onboard. what would be the benifits, if any, to have lets say a nvidia 6XX/7XX chipset mobo for this card?

Current Set Up:
-Core2Duo E6600
-ASUS P5NSLI mobo
-XFX 7950GT
-2GB Memory (not sure how to look up speed xD)
-80GB WD Raptor HD
-500GB Seagate HD
-Creative SB X-Fi
-DVD-R/CD-R Drive
-xfinity 500w PSU
-WinXP PRO (DX9c)

-SO can this mobo do fine with new hardware... or is it time?

Any help.. or suggestion are welcomed! thanks~

Thanks for links, will look into it-

But what I want to know is - Will my current mobo gimp performance from new parts or will it run okay?
Ill be good if it can run it fine, im not looking to buy a new board, but I guess I will if I must.
And if mobo upgrade is what I must do, links are welcomed!

Thanks

Those boards are a little over my price range after I spend $450 on the other stuff..

Would this one be fine?

http://www.newegg.com/Product/Prod [...] 6813131232

Yes, I want to buy another xfx 9800gtx+ to run it SLI in the near future. And im sure you know way more about chipsets then I do, so I will look into the X48/38 & P45/35 mobos. see if I can find an afordable atm. thanks again.

edit: max res is 1680x1050 - samsung 20" W

X48/38 & p45/35 dont support SLI if you want it. Although these chipsets are IMO more stable and reliable if you want SLI youll need a 7xx series chipset from NVIDIA

Thanks for the info guys.. Ill stick with the 9800GTX+ because the benchmarks almost seem even. And I have one incoming already. Plus Ive always been a Nvidia fan. So ill just stick with the 7XX chipset because I do plan on going SLI asap. thanks again~

Some of my GPU benchmark scores went up as much as 50% when I Crossfired my Radeon 3870. You will get a nice performance increase when you SLI. My second card was like $140. after the dust settled.