[dUnKle]

Intel Core i5 2500K Processor overclocked to 4.6GHz
Asus P8Z68-V LE Motherboard
8GB PC3-10666 DDR3 Memory
AMD Radeon 6670 1GB Graphics Card
1000GB SATA 7200rpm Hard Disk
128GB Samsung SATA
24x Sony DVD-RW Drive
500watt Basic EZCool PSU
Onboard High Definition Audio
Windows 7 Home Premium 64bit OEM

I have around hundred pound in cash and a £50 PC World voucher

Can anyone suggest which graphics card and CPU I can get from that ?

[EndlessWaves]

The 6670 isn't that slow so don't expect miracles. for £100-120 you'll probably get something around twice as fast.

PC World online have a surprisingly good selection of power supplies, although overpriced of course. I don't know what the jeantechs are like these days but the rest are acceptable quality.

[LJx]

The only graphics card I like the look of that is not way overpriced on the PCworld website is the Sapphire 7850 but that is £180, maybe I would put towards that and take my chances with the ezcool since the card only use 1 6pin connector.
You could use the voucher on a PSU from pcworld I guess then spend the £100 somewhere else and get a graphics card, you can get a 6850 for £90 and maybe something a bit better for £100?