Why do you keep adding a EZCool PSU?? Do you want the rest of your components to go up in smoke??
Search on Hexus and you will see many tales of woe with EZCool PSUs!! They have a nasty habit of going bang and destroying motherboards and graphics cards!!
A 650w EZCool will be lucky enough to produce half the rated power on a good day.
With a quad core you DEFINITELY need a good PSU as they have much higher power consumption than a dual core!!
The following PSUs are more akin to what you need for your system:
http://www.scan.co.uk/Products/500W-...n-Dual-plus12V
http://www.scan.co.uk/Products/450W-...PLUS-certified
http://www.scan.co.uk/Products/650W-...2-QUAD-SLI-PSU
Phenoms work much better with lower latency RAM. It is also advisable to buy a matched set too!!
I would get the following RAM off Ebuyer for 3 quid more:
http://www.ebuyer.com/product/143844
The 640gb WD hard drive is also cheaper on Ebuyer too:
http://www.ebuyer.com/product/144339
Get the RAM and the hard disk off Ebuyer and you will get free postage as the total it will be above £49.99!
If you just change the memory and PSU you will be fine!! Drop the soundcard and will still be the same overall cost!!