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Best card to Crossfire with? (bang for buck) - Page 2

post #11 of 27

Crossfired HD-5770's (or 6770's or 5770+6770) would be just a slight notch below in performance than a HD-6950 though ...

granted a pair of USED 5770's or 6770's would maybe be just a bit cheaper, but for just a bit more you can get a NEW 6950.

headscratch.gif How the OP thought he'd get TWO HD-6950's for ~$200 I'd like to know though ? tongue.gif 

 

So IMO though not in the OP's budget of ~$200 +/- the BEST Bang for Buck X-Fire option would have to be either TWO HD-6850's

or get TWO HD-6950's that unlock and OC and get performance better than a single HD-7970 for LESS money.

 

IF I were the OP ... I'd buy a single HD-6950 now and budget for a 2nd one later if that's what his budget is ... to me at least this makes the most sense. thumb.gif

 

Cheapest NEW 2GB HD-6950 = http://www.newegg.com/Product/Product.aspx?Item=N82E16814131393 @ $220.00 after MIR

My Recomended Budget Friendly 6950 w/ Good Chance to UNLOCK to 6970 = http://www.newegg.com/Product/Product.aspx?Item=N82E16814102945 @  $260.00 after MIR

 

As for a HD-6850 ... I'd consider these newer 2GB versions = http://www.newegg.com/Product/Product.aspx?Item=N82E16814102959 @ $180.00


Edited by LA_Kings_Fan - 1/11/12 at 2:39pm
   
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post #12 of 27
Thread Starter 
How would a pair of 6870 hawk edition do compared to a 6950?

I know someone who's willing to sell me a pair cheap.
post #13 of 27
2 6870's would be faster then a 6970. You will pretty much get 5970 speeds.
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post #14 of 27
Thread Starter 
Would my 650W ModXstreamPro be able to support those two cards?
Currently I got my HAF-X case & H100 hooked up to it with a OC'd X6 1035T.
post #15 of 27
two 6870's beat out a 580...
two 6950/70's are better...

I switched from CFX 6870's to 6970's and it was night and day


The big issue is that 1035T... you will be bottlenecked big time regardless of what you do.
post #16 of 27
Thread Starter 
Quote:
Originally Posted by Derek1387 View Post

two 6870's beat out a 580...
two 6950/70's are better...
I switched from CFX 6870's to 6970's and it was night and day
The big issue is that 1035T... you will be bottlenecked big time regardless of what you do.

So is it worth it to get a single 6970 and upgrade later on to a 2nd ?

Also how big of a PSU would i need to run two 6970 in Crossfire with a H100 and I7 2600K OC'd ~4-5 ghz
post #17 of 27
Thread Starter 
Could anyone help me with the questions above? ^
post #18 of 27
I just sold a set of MSI Twin Frozr II - 2gb 6950's for $400.00... they were every bit as fast as my current 6990 (still waiting on my 7970 atm). 6950's with a good overclock are AWESOME!

xfire 6970s will pull some wattage, with everything else you described I recommend an 850psu.
    
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post #19 of 27
Quote:
Originally Posted by Reeckz View Post

Could anyone help me with the questions above? ^

Your OCZ ModstreamXPro.. if it is anything like any of the other ModstreamXPro series PSU's then it isn't a true 650W PSU. It likely has around 500-550W on the 12V rails.. in which case you would definitely be on the edge of having issues with CFX 6870's. I would not trust your current power supply with those cards.

As far as 6970's go.. They pull around 300W under load, so I would suggest a quality 850W or greater for CFX purposes.

EDIT: I could not find a 650W variant of the OCZ ModstreamXPro, however there is a 600W version? Perhaps that is what you have. In which case that PSU has 504W on the 12V rails.

http://www.overclockersclub.com/reviews/ocz_mxs_pro_600w/3.htm

A single 6970 + the rest of your system would even be pushing it on that PSU.
Edited by iinversion - 1/15/12 at 11:41pm
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post #20 of 27
6950 or 6970 CF.
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