Originally Posted by Sporego
Nik your wrong
2X 5770 Msi Hawks Cost 359 $ (good over clcok)
And they run fast in gameing (2 gb in all)
1 5870 with 2 Gb( And 2 gb is only limited edition) Norm is 1 gb
I dont see why cheaper any better is bad
So 5770 is 100% better
how are 2x 5770's 100% than 1x 5870.
Sure the 5770's will run well in gaming (which the OP states he uses for rendering, thus maybe more consideration for a workstation card) but the 5870 will run equally well.
2 gb cards vs 1 gb card ≠ 2 x performance
Also as stated above the 5870 is in $400 range, which is = to apprx 2 x 5770s. If the OP is serious about his work, money shouldn't be a large factor.
There is issues with efficiency and optimization of two cards rather than one powerful one.
More headroom for expansion.Sure you can tri setup in future or add an additional 5870 for a dual setup.
Maybe consider a professional card?