Crossfiring: 6670 or 6450?

[Alin Carter]

Hi
I'm building a gaming rig, wondering if I could save some cash for other components more sorely needed. I was thinking that the 6670 is a good entry-level card and at a low price. Can anyone tell me what 2 6670s in Crossfire would be equivalent to?

P.S. If I need to go lower budget, it would be nice if anyone could tell me what 2 6450s are equivalent to

Thanks

 

[mohit9206]

two 6670's are equivalent to a 7750 and two 6450's is equivalent to a 6570. this is because crossfire scaling is never 100%. so two cards in crossfire WILL NOT double your graphics performance. so i suggest rather than going with 6670 crossfire get a single 7750

 

[MWisBest]

If you're using an AMD APU (A8 or A10 series, either Llano or Trinity) then you could get a 6670 and use Dual Graphics (pairing with APU's GPU) with it. If you plan on getting a 6670, get a GDDR5 version. Getting the DDR3 version effectively halves your memory speed as far as I can tell.