Help me decide

[Zigiy]

Sapphire HD 6850 1GB - $176
http://www.skycomp.com.au/item/SAP [...] -DX11.aspx

vs.

Sapphire HD 6870 1GB - $191
http://www.skycomp.com.au/item/SAP [...] -DX11.aspx

Will be using it for 3D rendering, So need the best one.

I'm not sure if this is nescearry, But the rest of my components are...
AMD Phenom II X6 1090T
ASRock 890GM Pro3 Motherboard Rev.2
G.Skill Ripjaws F3-12800CL9D-8GBRL 8GB (2x4GB) DDR3 (Dual Channel)
Seagate Barracuda 1TB ST31000524AS
ASUS DRW-24B3ST 24X DVDRW Drive
Corsair CX-600 V2
Aywun Game Series G05 Case



Everything else works/figured out, Just need the Graphics card.

 

[Aert]

Personally I would just get the better one for 15$ more, without even looking at what they are. Also, links are broken.