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5850 tri-fire - Help !!

post #1 of 14
Thread Starter 
Hi,

I would like to trifire 5850 but i have a few questions.

- Is my TX750 good enough to handle 3 GPUs in my sig rig (with my 1090T@4.2Ghz)
- How is performance in game with tri-fire vs crossfire ?
- Someone is selling 2 Asus 5850 for $150 each. Is it a good deal ? I think Asus warranty is on the card itself so it should be good right ?
post #2 of 14
Your system should be able to handle it (just don't overclock your cards too much).
You are also going to need to use the 4 pin molex to 6 pin PCIE adapter.
    
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post #3 of 14
I dont know whether your PSU is enough, it may be close. Maybe it would be best if you took the $300 you would spend on the two used ASUS and sell your present card and get 2 cards in the 6000 series.
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post #4 of 14
I dont think the performance difference between two and three is very much. I presently have 2 5870's, cause my third one is in for RMA. The increase is greater from 1 - 2 rather than 2 -3. If you dont want to sell yours and get the 6000, then maybe just get one more. It also may depend on what you do, and what games you play.
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post #5 of 14
Thread Starter 
hmmm right now im just playing BFBC2 and Black Ops and I'm only using 1 monitor in 1080p. I try to max everything but in BFBC2 i cant crank up the AA to the max. If I get the 6000 series in xfire it would be something like 2x6870 because i cant afford 2x 6950 (would be 600$..)
post #6 of 14
Just get a single hd6950 then, they make a difference in dx11. 1 of them counts for 2 hd5800s.
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post #7 of 14
A 750tx will be enough. I ran a 4870x2 and a 4890 in tri-fire on mine for months and the PSU still works. I wouldn't go nuts overclocking though as that is a lot of load to put on the psu. And tri-fire 5850's should perform extremely, extremely well. The only reason you possibly wouldn't be able to crank the AA to the max would be the limitation of 1 GB of VRAM, but the only games I would think that would really limit you there would be crysis, cryostasis, and metro 2033. You'll get a 10-30% increase in performance most of the time. The performance reaped from tri-fire all depends on the game and how well it is coded for multiple video cards though. Hope that helps.
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post #8 of 14
Sounds like a bad investment to me. Only has 1GB of vRAM and you're going to have triple the horsepower that will still be bottlenecked with the same amount of vRAM. Don't really understand why you would need three of any decent GPU for a single 1080p monitor, anyway. What kind of settings are you applying?

And 3-way scaling with either company is only about half as effective as two-way scaling, not to mention additional driver headaches.

2-way CF of better cards makes far more sense.
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post #9 of 14
Thread Starter 
hummm how's 2x 5850 crossfire vs 1x 6950 ? (cause thats gonna cost me about the same)
post #10 of 14
Thread Starter 
Quote:
Originally Posted by matrices View Post
Sounds like a bad investment to me. Only has 1GB of vRAM and you're going to have triple the horsepower that will still be bottlenecked with the same amount of vRAM. Don't really understand why you would need three of any decent GPU for a single 1080p monitor, anyway. What kind of settings are you applying?

And 3-way scaling with either company is only about half as effective as two-way scaling, not to mention additional driver headaches.

2-way CF of better cards makes far more sense.
Yeah ... thing is I already have a 5850 and theres a guy selling 2x 5850 so i was just asking ... but i think im gonna go with either 2way or sell my card and go single 6950
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