How do two Radeon HD 6770s in crossfire perform?

[sanders2]

I currently have a single 6770 in my rig and I'm wondering if I should run crossfire or just upgrade to a better card now. It would only cost me $100 to buy another card which is why crossfire is sounding pretty appealing. Does anyone have a setup similar to this?

 

[cool07ist]

go for it. costs less and also gives you more performance which will be better than a single radeon hd 6850!!! and might perform as well as radeon hd 6870 if both cards are overclocked well.GOOD LUCK!!

 

[de5_Roy]

I currently have a single 6770 in my rig and I'm wondering if I should run crossfire or just upgrade to a better card now. It would only cost me $100 to buy another card which is why crossfire is sounding pretty appealing. Does anyone have a setup similar to this?

depends on your pc specs like psu wattage (amps on the +12v rails), case size and air flow, cpu, ram etc.
dual 6770s will give you better fps. but you might face microstuttering - an fps fluctuating phenomenon which occurs when two (usually lower end) gfx cards are in cfx/sli. it also happens with higher end cards, but less frequent.
http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html
upgrading to a radeon hd 6950/6870/gtx 560/gtx 560 ti would be better than running dual 6770s in cfx.
another way would be hold off buying new card and wait for the new 28 nm cards' performance data, since 6770 is quite capable gfx card.
http://www.tomshardware.com/news/AMD-ATI-Radeon-HD-7000-GPU,14253.html

 

[wolfram23]

Roughly 6870 performance, as cool07ist stated. Personally, I might advise you to sell the 6770 and buy a single 6870 or 560 instead. CFX sometimes has issues like stuttering, and AMD has been slow to get CFX working on new releases like BF3 and Skyrim - which are huge games that they really should have prepared for.