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Is crossfire worth my time?

post #1 of 13
Thread Starter 
Hello all.

What I have:

I have taken my sig rig and built around a x58 chipset (I7 950). I bought a motherboard that has two x16 lanes so I was thinking of grabbing another 5770. The most graphical/cpu intense game I play is WoW. I use a 24" monitor at 1900 by 1200 res.

My question:

If I add another 5770 increase my DPS enough to make the $50-70 worth it? I know that WoW is CPU related FPS so obviously I will be OCing my CPU as far as my cooler allows But, the game is lagging due to my single 5770 (Don't quote me on this.)

Also, I forget what the precise ramifications are when it comes to crossfire and the wattage needed for the PSU. Anyone know what the recommended wattage is with two 5770s?

Thank you all for your replies! smile.gif
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post #2 of 13

Which 450W PSU do you have exactly?

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post #3 of 13
If your cpu can push it then yes. With my old 965 my 6870s were awful with my i5 amazing.
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post #4 of 13
5770s scale very well in crossfire.

Buying a 2nd 5770 is the best way to spend your money; there is no better option than 2x 5770s at the $100 level (which is about what you'd have after selling your existing 5770 to get a new card in addition to the $60 you're planning to spend).

Power wise... you might be good if you have a decent brand of PSU. 2x 5770s might actually use more power than a 5870, so you're cutting it close.
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post #5 of 13
I'd consider a move for a second 5770 to be wise.

The scaling on those is great.
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post #6 of 13
Can't comment on the 5770s specifically, but with all the CF hate around here I've very happy with my setup. Maybe it's because I have old eyes now or something, but I don't see any micro stutter. For what I would've been able to sell the one 6950 and what I bought the 2nd one it was a no brainer.
post #7 of 13
Thread Starter 
Thanks for the replies guys.

I had the Corsiar 430W builder, but I now have a 480watt Antec Neo, or a 500 watt "smart power." I do apologize for not being specific on the PSU I will be using.

@conzilla, (and others) If I had a I7 950 @4.0ghz+- would I be able to push the information out to utilize the two 5770s? This is basically were my question lies as of now, I know that I will see nice improvements, but will the CPU be able to make use of the graphical "power"?

Thanks again guys, OCN has never failed me yet thumb.gif
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post #8 of 13

Hmm.  The 480W Antec Neopower would be the better PSU to use, but I'm not sure this particular unit has enough power.

 

To be honest, I would ask in the Power Supplies forum.

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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #9 of 13
it would be a better idea to sell the HD 5770 and get a HD 7850 2GB. you might spend a bit more. but definitely worth it. get a factory overclocked HD 7850 and push it to 1.15 Ghz . Get yourself GTX 580 / HD 7870 performance. impossible for a HD 5770 CF to provide the consistency of performance which a single HD 7850 2GB GPU provides. CF scaling issues, working profiles , micro stuttering problems . its just not worth it. And at 1920 x 1200 the 2GB of VRAM which a HD 7850 2GB has is more or less a necessity.

http://www.techspot.com/review/603-best-graphics-cards/page3.html

HD 5770 performs in between HD 7750 and HD 7770. CF scaling in best cases is 1.8x - 1.9x. the HD 7850 even at stock would be on par or faster in most games. With overclocked HD 7850 it would be a no contest. so think about it.
Edited by raghu78 - 11/30/12 at 7:15pm
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post #10 of 13
Quote:
Originally Posted by xtreme-one View Post

If I had a I7 950 @4.0ghz+- would I be able to push the information out to utilize the two 5770s? This is basically were my question lies as of now, I know that I will see nice improvements, but will the CPU be able to make use of the graphical "power"?

Yes, 2x5770 performance is basically equal to a single 5870. A bloomfield i7 @ 4.0ghz paired with a 5870 was a very popular gaming combination.
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