I've got a 650W PSU, can't remember who mkes it. XClio I think.
The 55nm EVGA overclocked one is £225 from scan.co.uk at the moment - worth the extra over the Black?
IMHO ..... no, grab the 65nm card, it runs cooler & uses less power (

I'm quite into PhysX. I used to have a dedicated PhysX card so have got games that support it and patches, etc.
I thought there was a modified driver to allow ATI cards to use PhysX - is that right?
physX intrigues me also, there is something going on in regard to ATI & physX.....look here

My Computer
System One
-
- Manufacturer/Model
- ME.....
- CPU
- Q9450 @ 3.6ghz
- Motherboard
- P5K PREMIUM
- Memory
- 8GB 1066mhz buffalo firestix
- Graphics card(s)
- HD 5970
- Monitor(s) Displays
- 20'' syncmaster
- Screen Resolution
- 1680x1050
- Hard Drives
- 160GB 7200RPM SEAGATE BARRACUDA IDE 160GB 7200RPM SEAGATE BARRACUDA SATA 2
- PSU
- XCILIO 850w
- Case
- unknown ATX
- Cooling
- Arctic cooler pro 775
- Mouse
- logitech cordless optical
- Keyboard
- logitech EX110
- Internet Speed
- 2mb