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WHICH GPU :| :| VERY CONFUSED I NEED YOUR HELP GUYS!! - Page 2

Poll Results: RADEON HD 6990 CROSSFIRE (DUAL) vs MSI TWIN FROZR II SLI (DUAL)

 
  • 60% (14)
    RADEON HD 6990 CROSSFIRE (DUAL)
  • 39% (9)
    MSI TWIN FROZR II SLI (DUAL)
23 Total Votes  
post #11 of 34
I wouldn't recommend the 6990's. Quadfire is sketchy, like any 4-way GPU setup, and even when it works properly I believe you'll be bottlenecked by the 8350's poor single threaded performance. The SLI 580's are the best of both options unless you desperately need the extra 500MB of VRAM.

Regardless, these GPU's are worth a decent coin. For $350, you can get 7950 which outperforms the 580 by a huge margin, and is slightly behind the 6990 without the quadfire, power consumption, thermal, and bottleneck issues. I just purchased a pair of HIS IceQx2 7970's for $360 each; I strongly recommend selling all of those cards and picking up two 7970's.
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post #12 of 34
Quote:
Originally Posted by MrSingh View Post

Thanks for your reply, do you say 6990 quadfire because they are dual-gpu cards right? Can I use crossfire and sli together on same motherboard? just wondering :S

Wont have a problem with power due to picking up this beast..the CPU can pull a bunch of power overclocked aswell.

Yeah. Saying quadfire just make it more easy for everyone to keep in mind that the 6990 is a dual gpu card and suffer already in it self form crossfire drawbacks.

No you can't run SLI and crossfire at the same time.

Seams like you will be all set in terms of power so why no do like Lass3 suggested and try them both out your self and see what strikes your
fancy.

Edit: One more thing to keep in mind. The 6990's have 2GB's of effective vram while the GTX 580's only have 1,5GB. While not a huge issue there are now games that can go beyond 1,5GB even at 1080p. Its rare but it does happen.
Edited by Bit_reaper - 3/1/13 at 1:41am
    
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post #13 of 34
Thread Starter 
Thank you for all your help guys, I think I will try running both setups and see what the results are...Right now I am considering running the 2 6990's and using the gtx580 as a physx card. Lets see how this goes!
post #14 of 34
Quote:
Originally Posted by MrSingh View Post

I can use 2x crossfire and 1x sli in the same setup??!?!
NO. It's logical that you can't use crossfire and SLI and anyway what's the point?
It's just making use of the 580 as a physics processor

A single 6990 will be very close to the 580 SLI at higher resolutions but you save alot in power consumption.
Fermi is not to be forgotten to be power hungry as hell and well more of a cable mess in SLI ...
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post #15 of 34
Quote:
Originally Posted by MrSingh View Post

I can use 2x crossfire and 1x sli in the same setup??!?!

No, you can't have 2xCrossfire AND 2xSLI at the same time. What was suggested was you use the 2x6690 for all graphics, and add one GTX580 EXCLUSIVELY for Phys X. However,, I suggest you look at the list of Phys X games. There's not many out there nor are there many upcoming Phys X games. Phys X just isn't that popular. Even then, I'm not sure it would be worth the risk of software issues with that type of set up (AMD & Nvidia graphics drivers)

As for which card(s) you should use, additional information would be helpful.

(1) What's your monitor(s) resolution? 1600p & higher (maybe even 1440p) the little extra VRAM in the 6990 (2GB for each GPU vs 1.5 for the GTX580) will help along with the 6990 greater graphics power. At 1200p/1080p, the GTX580 1.5GB VRAM is enough IMO.

(2) You mention "computing power in video rendering and image editing is a big priority." Ok, what software specifically are you talking about? If your using any Adobe Creative Suite application other than Photoshop - then it's Nvidia by default if you want GPU acceleration. However, if it's JUST Photoshop for Adobe and something else like VegasPro, the 6990 or 580 will work. NOTE: AFAIK, you will NOT get any benefit from either Adobe software or VegasPro for more than one GPU (i.e. only one GPU on a single 6990 would be used). I strongly suggest you determine whether AMD, NVIDIA or both will work with each one of the GPU compute/acceleration software applications you plan to use. Finally, IIRC, I think the GTX500 series was much better at GPU compute than the Radeon 6000 series with the roles reversing for the current generations. So even if you can use AMD for your GPU compute/acceleration software, depending upon how important max GPU compute/acceleration is to you, you still might be better off with 2xGTX580 in SLI. This question may make the choice for you.

As for the CPU, I doubt you'll see any bottle-necking with any sort of decent OC. While it can happen, IMO that fear tends to get overplayed a bit. It's not like your running an Athlon. tongue.gif Lastly, nice PSU. The AX1200 is a solid choice. The AX1200i is even better, but more expensive.

Short version = IMO, unless you must use NVIDIA for GPU compute/acceleration due to software limitations or maximizing/prioritizing GPU compute performance, I'd go with dual 6990s (just make sure your case has good airflow to the cards). With that set up, you should be good for quite awhile IMO up to 5750x3600 resolution.
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post #16 of 34
I would not add a 580 for PhysX.. Quad GPU is enough trouble as it is (+ Your CPU would prob. bottleneck the setup) A Nvidia card for PhysX would just cause even more problems. If CUDA/PhysX is important to you, go with the 580 SLI.

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_Titan/27.html

As you can see 580 is still a great GPU. It's almost as fast as 7950 overall in 1920x1200 (but lacks the memory) Anyway.. 1.5GB would be enough for 1920x1200 and below.. 580 SLI can't handle MSAAx8 or stuff like that in demanding games, like Crysis 3 anyway. Even 7970CF/680SLI can't do that with good fps.. So the memory would not be a very big issue..

I would go with 580 SLI, because after a little OC it will deliver very good fps (a good 20-25% over 680/7970GE, depending on game ofc - this means on par with Titan)

But as i said ealier, try both and choose smile.gif
Edited by Lass3 - 3/1/13 at 3:31am
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post #17 of 34
Quote:
Originally Posted by Lass3 View Post

I would not add a 580 for PhysX.. Quad GPU is enough trouble as it is (+ Your CPU would prob. bottleneck the setup) A Nvidia card for PhysX would just cause even more problems. If CUDA/PhysX is important to you, go with the 580 SLI.

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_Titan/27.html

As you can see 580 is still a great GPU. It's almost as fast as 7950 overall in 1920x1200 (but lacks the memory) Anyway.. 1.5GB would be enough for 1920x1200 and below.. 580 SLI can't handle MSAAx8 or stuff like that in demanding games, like Crysis 3 anyway. Even 7970CF/680SLI can't do that with good fps.. So the memory would not be a very big issue..

I would go with 580 SLI, because after a little OC it will deliver very good fps (a good 20-25% over 680/7970GE, depending on game ofc - this means on par with Titan)

But as i said ealier, try both and choose smile.gif

The FX8350 shouldnt end up causing a bottleneck with either of those GPU's. That CPU has been running strong in gaming benchmarks with more powerfull cards. Especially if he can crank it up to 4.8-5.0ghz.
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post #18 of 34
Guess so. It won't hold back a titan by much so i doubt it will hold back 6990 CF'd and a 580 for physx
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post #19 of 34
6990 for 350$! Awesome price!
To sum it up : With 6990's in CF you of course get a lot more performance, but they're noisy cards as far as I know, you'll need a big PSU ( an AX 1200 is more than enough ), and you get an extra 500 MB of RAM. These cards are power hogs and will consume more power tho. QuadFire doesn't scale so well and you're facing potential microstutter with either setup, depends if you notice it, microstutter is supposedly higher on Crossfire than SLI setups. I heard tho, that more than 2 cards in crossfire alleviates the microsttuter. No PhysX but if u dedicate a 580 for PhysX it'll be more than enough.
With 580's in SLI : Less performance, less power consumption and less noise, Physx ( not a big issue tho ). Possible microstutter.
Pick whichever you like, if u can, test both and see whichever one you like more.
Edited by Skorpian - 3/1/13 at 5:10am
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post #20 of 34
the GTX 580 SLI is better as it utilizes lesser number of GPUs. scaling in multi GPU is worse after 2 gpus. SLI is also generally more robust and Nvidia's multi GPU driver support is better.
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