ASUS Crosshair IV Formula - AMD 890FX - Socket AM3 - PCI-E 2.0 - DDR3

Hiya, I am new here and I am desperately seeking help for my current PC Build.

Current build:

CPU: AMD Phenom II X4 Quad 955 Core 3.2GHz Processor 4 x 512 KB Boxed - Black Edition (ALREADY GOT IT)


Graphic Card: Sapphire ATI AMD HD 6950 2GB GDDR5 HDMI Graphics Card PCI-E 2.1

PSU: Corsair CMPSU-1200AXUK 1200W Power Supply

Motherboard: ASUS Crosshair IV Formula - AMD 890FX - Socket AM3 - PCI-E 2.0 - DDR3 1600/1800/1866 - SATA 6Gb/s RAID - SupremeFX X-Fi Audio - CrossFire - ATX (ALREADY GOT IT)



Case: Antec Full Tower Twelve Hundred Retail Case - Black

DVD: LG GH22NS50.AUAA 22x SATA DVDRW Drive - Bare Black

Memory/Ram: Corsair CMX6GX3M3A1600C9 3 x 2GB DDR3 SDRAM Memory

Hard Drive: Western Digital Caviar 1TB SATAII 64MB Cache 3.5-inch Green Internal Hard Drive OEM


Now as you can see, I am already stuck with the CPU and the Motherboard(Dumb beginners choice)

but the problem is, I am worried that my Memory Ram will not perform to it's best condition, even the fact that the motherboard says "Any Memory is OK" It's a gaming motherboard with features like buttoned O.Cing and etc.

The memory is:

Corsair CMX6GX3M3A1600C9 3 x 2GB DDR3 SDRAM Memory

http://www.amazon.co.uk/Corsair-CMX6GX3M3A1600C9-DDR3-S...

The Motherboard:

ASUS Crosshair IV Formula - AMD 890FX - Socket AM3 - PCI-E 2.0 - DDR3 1600/1800/1866 - SATA 6Gb/s RAID - SupremeFX X-Fi Audio - CrossFire - ATX


http://www.amazon.co.uk/gp/product/B003F8SNBM/ref=oss_p...


All opinions for improvement are very much welcome, I am trying to keep the build to less than 1500£.

Also, I will be doing Crossfire with the graphics card, and I will get the same graphic as the one on the list above. The reason is because I want to be able to play BFBC2 on max settings with more than 60 FPS in an intense battle, and if 1 GPU can't achieve that, I will buy another one.

But please help me out with selecting a Memory ram, I am looking for no less and no more than 6GB of ram, that can work at full speed using my motherboard. Thank you so much.