Graphics Card Upgrade for £250

[Kenzowestside]

Hi ,
i am looking at upgrading my graphics card, i don't really want to spend over £250.
Any advice would be much appreciated!

Heres my rig
Samsung S22C300BS 22" Widescreen LED Monitor
NZXT Phantom 410 midi tower case.
Corsair GS 600W PSU.
Intel core i7-4770k-3.50GHz (been overclocked to 4.2Ghz).
Geforce GTX 660 EX OC 2048MB Graphics card.
Seagate Barracuda 7200RPM 1TB SATA 6Gb/s 64MB Cache HDD.
Akasa nero 3 V2 CPU cooler.
Gigabyte Z87-HD3 intel z87 (socket1150) DDR3 ATX Motherboard.
Kingston Hyperx Genesis Grey 8GB (2x 4GB) 1600MHz Duel Channel Kit.
Asus 5.1 sound card.
with windows 7 home premium 64 Bit.

Thanks in advance.

 

[verma1891]

http://uk.pcpartpicker.com/part/msi-video-card-n770tf2gd5oc