Cheapish PC - advice needed

[7zark7]

I'm looking at replacing my old PC as it's gone beyond the point of upgrading. Athlon 64 3200, 1gb ram, ATI 9800pro - all from ocuk years ago.

Primary use would be for iRacing. Secondary uses are for occassional architectural jobs and/or renderings. (Nice to see I've got my priorities straight )

Will be re-using monitor, keyboard, mouse. Already have Windows 7 disc.

I've currently got together this spec:

Sapphire ATI Radeon HD 5770 1024MB GDDR5 PCI-Express Graphics Card
http://www.overclockers.co.uk/showproduct.php?prodid=GX-216-SP

AMD Phenom II X3 Tri Core 720 Black Edition 2.80GHz (Socket AM3) - Retail
http://www.overclockers.co.uk/showproduct.php?prodid=CP-238-AM

Asus M4A79XTD Evo (Socket AM3) PCI-Express DDR3 Motherboard
http://www.overclockers.co.uk/showproduct.php?prodid=MB-366-AS

Patriot Sector 5 G Series 4GB (2x2GB) PC3-12800 1600MHz Dual Channel (PGV34G1600ELK)
http://www.overclockers.co.uk/showproduct.php?prodid=MY-025-PA

OCZ ModXStream Pro 500w Silent SLI Ready Modular Power Supply
http://www.overclockers.co.uk/showproduct.php?prodid=CA-037-OC

Samsung SpinPoint F3 500GB SATA-II 16MB Cache - OEM (HD502HJ)
http://www.overclockers.co.uk/showproduct.php?prodid=HD-081-SA

Coolermaster Elite 334 Midi Case- Black (No PSU)
http://www.overclockers.co.uk/showproduct.php?prodid=CA-184-CM

Edimax EW-7128G 54Mbps Wireless PCI Adapter
http://www.overclockers.co.uk/showproduct.php?prodid=NW-041-EX

Sub Total : £450.35


Before I order I have a few basic queries:

1) A tri-core would suit my needs but will still be looking at unlocking the 4th core. If so, would I need a better cpu cooler or is stock ok?

2) Have I got the right psu and memory?

3) Would I need any additional fans in the case or is the one supplied enough?

Thanks.

 

[roop128]

will you be using a 64 bit version is W7

 

[roop128]

PSU is fine btw

 

[7zark7]

Yes I'll use the 64bit disc.

BTW, I won't be looking to spend any more than the above spec.