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-   -   Crossfire with 2x6770 or 1x6770 and 1x6750 (http://www.hardwarecanucks.com/forum/video-cards/55288-crossfire-2x6770-1x6770-1x6750.html)

igot6strings July 6, 2012 04:33 AM

Crossfire with 2x6770 or 1x6770 and 1x6750
So the 6770 and 6750 are compatible for crossfire. The 6750 is about $70 new now at NCIX. I already have a 6770 and want to add a bit more kick for gaming. I understand its a pretty run of the mill card but I think its more budget friendly to add a 2nd card than pick up a more expensive higher end card.

Would there be much of a loss in performance if I bought a 6750 instead of another 6770?

Agent-A.01 July 6, 2012 09:16 AM

not much difference, but id still dont think its worth getting another card for CS. wait until you can afford a fast single card.

dandelioneater July 6, 2012 09:29 AM

It is probably more economical in your situation to add a second card for Xfire than to buy a higher end card. Just make sure that the games you play support xfire well enough. Those cards probably scale fairly well in xfire so I think its a good deal for a bot more power

igot6strings July 6, 2012 03:10 PM

thanks for the input folks.
I'll probably look for a 6750 and give that a go since its a good bit cheaper and not much different in performance as a 2nd card. $70 new is alot better than $200-300 for a higher end card for my budget right now. I'd like to find one or a 6770 second hand though. Once I get my posts up I'll put it in the bst if I haven't already bought it from NCIX by then.

Funguseater July 11, 2012 02:39 PM

Hi, just wanted to relate my experience crossfiring a 5770 and a 5750 (same as 6000's).

After crossfiring I did see a remarkable (almost double ) performance increase in all of the tests that I ran, and after overclocking the 5750 to similar speeds to the 5770 the system SHOULD have been equal to a about a 6950. However in reality the cards did not seem able to keep the screen from, "shaking", "tearing", whenever the point of view was rotated and no amount of v-sync helped or made a change. Maybe it has to do with the 128 bit bus, I don't know, moving in a straight line or sidestepping did not cause this problem only rotating a first person perspective's point of view caused this.

While trying to fix this problem I realized that it is very common and happens alot to people at high resolution 1920x1200 with espescially with these lower end cards so I just bit the bullet and sold my two cards and bought a cheapo GTX480.
Good Luck

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