Upgrading Computer the Big 3, Suggestions?

[Razumen]

So I'm thinking of finally biting the bullet for the upgrade of the big three, but I'd thought I'd run my selection through you guys first.

First off I'll be reusing these parts from my previous system:
PSU: Enermax Liberty 500W
Sound: Creative Audigy 2 ZS
Video Card: EVGA Geforce 7900GTX 512
Optical Drive: Sony DVDR/W Burner
Hard Drives: One 300GB SATA Seagate and a 250GB IDE Western Digital

My new system will be primarily for gaming, I may or may not overclock, not sure yet. I'm trying to keep the costs to $900 or less. Here's what I'm thinking of getting:

CPU: Core 2 Duo E6600 $318.99

MOBO: ASUS P5W DH Deluxe $230
This is probably the item I'm least sure of, $230 is a lot for a mobo.

RAM: Mushkin 2GB DDR2 (2x1GB) DDR2800 Dual Channel, Unbuffered, 5-5-5-12 $249
I'm thinking this should be good, unless it'll seriously hamper OCing later on.

Case: ASUS TA-210 ATX Mid Tower Case 54.83$
I really like the looks of this case, but depending on how it performs and how much everything else costs I may just my old Coolermaster Centurion case and order it later.

Zalman CNPS9500 At LGA775 Heatsink Fan $55.09
Probably overkill if I don't OC, but I still like to keep my system cool.

 

[WR2]

Arctic Cooling Freezer 7 Pro $CAD 23 would save you some money to get an extra case fan $7.45 (80mm or 120mm depending on your case choice) and do nearly as good cooling the CPU. Arctic-Cooling Freezer 7 PRO review
Unless you plan to use a Crossfire (ATI) multi-GPU setup a 975x motherboard is more than you need.
Look at one of the 965 chipset motherboards that overclock higher.
Gigabyte GA-965P-S3 $CAD 145
That RAM, the GA-965P-S3 motherboard, E6600 CPU and AC Freezer 7 Pro cooler should give you a good shot at 400+ FSB overclock (266 stock FSB) which works out to about 50% or 3.6Ghz on that E6600.

 

[Razumen]

So with a capable 965P mobo would I be able to run two Nvidia cards in SLI, or only Ati ones? I'm also wondering about when they implement physics processing on their cards, that I'd need another PCI-E slot.

Actually, from what I've read I'm now leaning more towards the EVGA Nforce 680I SLI

 

[hdawg06]

So with a capable 965P mobo would I be able to run two Nvidia cards in SLI, or only Ati ones? I'm also wondering about when they implement physics processing on their cards, that I'd need another PCI-E slot.

When are they going to start implementing physics processors? I haven't heard anything about this really. Also, is it a PCI Express or PCI Express x16 slot that you will need 2 of?

 

[Razumen]

It would use a x8 PCIe slot.

I know that Nvidia's new 8800 card supports physics processing, and with a Mobo like the 680i you can run two of them in SLI, and use a third solely for physics. (Not that I ave the money for such a setup :roll:, but I like the stability and overclocking potential of the 680i)

What I don't know yet is whether it'll be able to do physic and graphics calculations on one card, or you'll need to have another just for physics.