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GTX 580 or 6950 crossfire

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August 1, 2011 10:45:57 PM

Hi, im looking for new cards for my current rigg:


ga-p55-usb3 (rev 1.0)
intel i5 750 (nocthau d14)
4gb ram
ati 5850
corsair tx 650 (Im know i might have to buy a new one)



Now to the problem. I cant decide if i should chose gtx 580 or crossfire 2gb 6950s, i know 2 6950 will win over the 580 in performance, but something im afraid of is performance issues with crossfire like, Microstudder (specially that)or that my cpu will be to much of a bottleneck.

Price of the gtx 580 im choosing http://www.komplett.se/k/ki.aspx?sku=623550 is 447 euro/383 pounds

XFX XFX Radeon HD 6950 2GB is 496 euro/426 pounds


So i anyone have any experience with these cards, especially crossfire i would like a helping hand on me decision.



Thankful for answers and sorry for my english :) 

More about : gtx 580 6950 crossfire

August 1, 2011 10:53:24 PM

Go with the one 580 as you can later buy another card to sli with your 580 that will get you improved performance over the two 6950's.

Although the point is moot because looking at your setup, there will be other bottlenecks.

a b U Graphics card
August 1, 2011 10:58:18 PM

Chillin is completely right, I would go with the single 580 now as you won't see the full benefit from the Crossfire setup. After that I would make a CPU upgrade my next priority, as 580s in SLI would be bottlenecked horribly.

Edit: On the issue of your PSU, you don't need a new one for a single 580(with any overclock) or CF6950s (at bone-stock). However SLI 580s or any overclock on the 6950s would warrant the acquisition of a new, more powerful unit.
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August 1, 2011 11:05:01 PM

chillin15 said:
Go with the one 580 as you can later buy another card to sli with your 580 that will get you improved performance over the two 6950's.

Although the point is moot because looking at your setup, there will be other bottlenecks.



The only think i know for sure is that it will lose slight performance from that mobo cuz of the x4 slot.


cuecuemore said:
Chillin is completely right, I would go with the single 580 now as you won't see the full benefit from the Crossfire setup. After that I would make a CPU upgrade my next priority, as 580s in SLI would be bottlenecked horribly.




Theres another problem if i chose that model is that it will take to much space and it will suffocate for sure if i SLi it, but maybe i can change the cooler if so? :) 



Very thankful for your answers!
August 1, 2011 11:10:46 PM

no prob. One of those babies should be fine to max you out in all games.
a b U Graphics card
August 1, 2011 11:12:54 PM

Yep, you'd be right up against the next card. Guru3d posted a review of those in SLI and they seemed to hold temps that were too good to be true; I suspect that they spaced them further than your motherboard would accommodate since they had a motherboard that could. Thus, I would recommend against the Asus model for SLI, I'd get a model with a two-slot cooler and let it enjoy the three-slot airflow.
August 2, 2011 9:00:39 AM

Okey, will my powersupply make it? Otherwise im going to get an overkill psu so i dont have to change again. Something like AX 850 gold its just slightly over ax 750 gold over here :>
a c 106 U Graphics card
August 2, 2011 3:32:56 PM

How about just adding another 5850 to run in crossfire? Of course there will be a bit of performance loss since your board is 16x 4x especially since that 4x is running off the P55 rather than the PCI-E controller on the CPU die. Yes there are some games where crossfire does not work well (like the first Force Unleashed), but I find that those are usually games that work fine on just one card anyway :D . I think it makes more sense for you to add a second 5850 rather than adding two 6950s, but if not then just get the GTX 580.
August 2, 2011 3:42:25 PM

6950 CF comes close to 580 sli since CF>sli atm

But you're cpu would bottleneck it and 4x isnt too good, and i dont think it would run on you're psu, so go for 1 580
a c 602 U Graphics card
August 2, 2011 4:06:16 PM

There's nothing a single GTX 580 can't do that would make it mandatory to go for a less reliable dual card setup. That Asus model can overclock very well and will handle any game you throw at it with ease.
August 3, 2011 9:14:37 PM

Omg. Im having a hard time making this decision if i even should get this card or not, do you guys think its relly a good jump from 5850 to gtx 580 or should i just wait?
a b U Graphics card
August 3, 2011 9:20:10 PM

I agree with megaman... Add another 5850, that seems like the cheapest /best option.

August 3, 2011 9:42:15 PM

Cygnus x-1 said:
I agree with megaman... Add another 5850, that seems like the cheapest /best option.



Hmmm maybe :p 
August 3, 2011 9:43:29 PM

0ozee said:
6950 CF comes close to 580 sli since CF>sli atm

But you're cpu would bottleneck it and 4x isnt too good, and i dont think it would run on you're psu, so go for 1 580



A new psu is not a problem though :) 
August 3, 2011 11:05:34 PM

A few people here have mentioned your cpu bottlenecking the 580.

If I was you, I would save and upgrade the cpu and gpu together (if you plan on getting a 580).

If not, get a lower level video card - maybe a 560 ti.
a c 125 U Graphics card
August 4, 2011 12:29:25 AM

I've compared my CF 5850s (with an OC to 870/1200) to benchmarks and find that the performance is better than a stock 5970, usually close to 580 performance.

I'd really suggest that as your first option, if you can still find one. There's a 5850 Xtreme that supposed to retail at $150 but it's sold out everywhere I've looked.

Otherwise I'd probably go straight to a 580.
a c 602 U Graphics card
August 4, 2011 2:30:40 AM

I'm having a hard time thinking that a Core i7-750 cpu is going to be a bottleneck. Maybe a little, but those are high-end quad cores with a lot of headroom to overclock.
a c 144 U Graphics card
August 4, 2011 3:03:41 AM

^ agree with that. i don't think i5-750 will bottleneck single GTX580 even at its stock clock (2.66Ghz). for SLI it might bottleneck but it should be fine if you can push the cpu to 4Ghz and above.
August 4, 2011 4:49:27 PM

wolfram23 said:
I've compared my CF 5850s (with an OC to 870/1200) to benchmarks and find that the performance is better than a stock 5970, usually close to 580 performance.

I'd really suggest that as your first option, if you can still find one. There's a 5850 Xtreme that supposed to retail at $150 but it's sold out everywhere I've looked.

Otherwise I'd probably go straight to a 580.



There was a xfx 5850 black edition i found yesterday but now its gone, they keep coming up but only 1 in stock in my country and they dissapear instantly o.O




August 4, 2011 4:51:52 PM

As long as gtx 580 is not a totall waste of money im going for it.
a c 216 U Graphics card
August 4, 2011 4:57:21 PM

chillin15 said:
A few people here have mentioned your cpu bottlenecking the 580.

If I was you, I would save and upgrade the cpu and gpu together (if you plan on getting a 580).

If not, get a lower level video card - maybe a 560 ti.


His CPU will not be a bottleneck as long as he OC's it. The i5-750 is a great overclocker and he has a great cooler on it. There is no problem with his CPU. I'd get more Ram however.
August 4, 2011 5:29:21 PM

I would also add a 2nd 5850. That card still has lots of life in it.
a c 216 U Graphics card
August 9, 2011 3:42:58 PM

While I agree with that principle to a point. 580's are too expensive for their performance. I agree with the above up to a 570. I also believe that if you want more performance than a single card can give that pairing two higher end cards is a good solution. At the moment, I'd classify these as high end: 6950/560ti, 6970/570 and 580. Given the cost of the 580, I'd rather get two 6950's or 560ti's for the same cost.
September 27, 2011 9:18:35 PM

How long until we see PCI Express 3.0 since some stuff is already getting ready to use it. I bought 2 6950 2gbs and they rock. I spent under 500 usd and I think antything more then these two are overkill and for people who put there specs in sigs.
September 28, 2011 6:05:16 AM

Wait before you get the 580 if you can afford 600 usd's id go with a couple Zotac 570's sli'd. Cheaper and the OC'd 570 come in just and i mean just short of the 580s for allot less money and perform allot better than to of the ati cards.
September 28, 2011 3:39:32 PM

I can afford it, but to bad my mobo do not support SLI :( 
!