What graphic card to buy!?

[Amarr]

I wanna buy a new garphics card but i have hard time to decide what to buy, and i though maby some ppl here could give me advice.

my PC
CPU Type QuadCore Intel Core i7 920, 2800 MHz (21 x 133)http://ark.intel.com/products/37147/Intel-Core-i7-920-Processor-8M-Cache-2_66-GHz-4_80-GTs-Intel-QPI

Motherboard MSI X58 Pro-E (MS-7522) http://www.msi.com/product/mb/X58_Pro.html#hero-overview

Memory Kingston HyperX 8 GB DDR3-1333 DDR3 SDRAM

Price range for new graphic card up to 320 euros.

Sorry for bad english.

 

[Jonathan Tyer]

For that much, you can get either a GTX 780, GTX 970, or a R9 290X

 

[Amarr]

I know this question it might sound stupid but dose PCI ex 3.0 x16 card work on motherboard with 2.0x 16