PC upgrade - What to upgrade?

[ZenTiX]

XP SP3
Gigabyte 965P DS4
Intel c2d E6600 (2.4 GHz)
2 GB DDR2 6400 TwinX Corsair ram
ASUS 7900 GTX 512 MB !
300 W PSU !

CPU-Z http://valid.canardpc.com/show_oc.php?id=1192673

This pc has to run Bad Company 2 'fairly' - Low settings are fine with me, aslong as I get 30 fps

Fried budget: 400 to 650 euro ish

[Chaos]

Intel Q9400/Q9450 (same thing)
4GB Ram
5770

Wait untill teh new nV cards come out (the mid range cards) and wait for ATI prices to fall a bit.. thens the prime time to buy

[ZenTiX]

The Core 2 Quad isn't actually a smart buy (atleast not in Denmark)
You get more out of an i5 performance and money wise

[Chaos]

The Core 2 Quad isn't actually a smart buy (atleast not in Denmark)
You get more out of an i5 performance and money wise

but that involves a new mobo (and subsequently a new psu a lot of the time)

My way is cheaper

also, nothing wrong with C2Qs.. Mine runs every game great

[frymaster]

do case/psu, RAM, and OS first
then GPU
CPU will be ok...ish... with a better GPU, if you're short of money, as many games don't use more than 2 threads anyway
but if you have the money, a fast core2quad will see you right

or we can spec you out a whole new system

[ZenTiX]

Wouldn't both the CPU and GPU be related to what PSU I chose?

Rig as of now:
CPU - Intel Core I5 @ 2,66 GHz
PSU - 550 W
MOBO - Gigabyte GA-P55M-UD2 M-ATX
RAM - Kingston 1 x 2 GIG DDR3 PC3 8500
GPU - Club 3D 260 GTX 216 version
OS - Win 7 Home Premium

Roughly 582 pounds

Few questions. Is it worth getting 4 Gig's of ram instead of 2? When talking gaming performance.

I'd say a 550 W PSU would run the system without any problems. Correct me if I'm wrong on this one.

Also any benefits to running the OS on 32 bit or 64 bit? Are all the kiddy-problems gone with 64 bit now? Remeber a few years back, everybody had driver issues and so on with these kind of systems.

[DeathByDribbling]

You need to get 2 sticks of ram or you'll half the memory bandwidth.  I think you'd be better off geting 4GB anyway - 2GB is only *just* enough for some games with windows 7.

Personally I'd go higher then 550W for the psu - that's probably enough for what you have but if you o/c the i5 then upgraded your gpu to something even more power hungry it would be pushing that psu very hard.

[Tikcus]

http://www.tomshardware.co.uk/athlon-ii-x3-440-gaming-performance,review-31906.html
http://www.tomshardware.com/reviews/balanced-gaming-pc-overclock,2625.html