Topic Title: 3-way CFX with AMD
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Created On: 04/12/2014 10:28 AM
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 04/12/2014 10:28 AM
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Vegan
Elite

Posts: 1183
Joined: 01/31/2010

While my PSU and motherboard is not suitable for 3-way yet, I am thinking of moving to 3-way capability 

that requries a new version of the 990FX setup for 3-way

that and a 1200W PSU

any problems with 3-way AMD rigs?

 



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 04/12/2014 12:13 PM
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UcouldBrong
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Read some reviews on the technology and you may find a case of "diminishing returns" for the heat, noise and costs.



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Non-noob components.

 04/13/2014 03:37 AM
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-rascal-
Farming Materials

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UcouldBrong is right, you will start to see deminishing returns after two cards. Even though, it's not as bad with the newer HD 7000 and R9-200 series, it's still apparent.

It looks like you are running a single GTX 660Ti with a GTX 260 for PhysX right now. You'd see a nice performance boost with even one R9-290 / 290X. Heck, even a R9-280X (aka HD 7970) would be a jump in performance.

Stick with your TX850 and grab two R9-280X...or..if you have the cash, two R9-290 / 290X.

 

Even though your motherboard runs X16 / X16 / X4 / X4, PCI-E X4 shouldn't be much of a performance drop. I would rather worry about if your case is large enough to support three GPUs.

If you are still "iffy" then your options for... X16/X8/x8 (or something similar) would be

  • ASUS Crosshair V Formula-Z
  • ASUS Sabertooth 990FX
  • MSi 990FXA-GD80
  • Gigabyte GA-990FXA-UD5
  • Gigabyte GA-990FXA-UD7
  • AsRock 990FX Extreme9

Depending on what GPU's you decide to run in three-way CrossfireX, you may either need a 1050W, or a 1200W+.

Have a look at this: https://www.youtube.com/watch?v=TISoJsWbaSc

The guys at DigitalStorm did some R9-290X 1x, 2x, 3x, 4x CrossfireX testing late last year. Pretty cool stuff IMO.



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Phenom II X6 1090T @ 4.1GHz FX-8350 @ 4.8GHz // ASUS Crosshair V Formula 990FX // Sapphire Radeon HD Dual-X 7970 @ 1150/1500 // Thermaltake Frio w/ push-pull (using Antec Formula 7 Nano-Diamond + Cooler Master JetFlo fans) // 8GB (2 X 4GB) G.Skill RipJawsX 2133MHz  // Corsair TX850 850W // Corsair Force GT 120GB SSD (OS) // Kingston V200+ 120GB SSD // WD Caviar Black 1TB // Windows 7 Ult x64

 04/20/2014 06:25 PM
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Vegan
Elite

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Joined: 01/31/2010

My 300R has plenty of room for cards in the 10-10.5 inch range which is typical for single GPU cards.

I am also considering some dual GPU cards with the idea of 4-way with a pair of them.

Now the R9 295X is nice, but its tad out of this weeks cash position.

Asus used a pair of GK104 on a board calling it the Asus Mars 760 which sells for $250 new, but anybody do that with a rival AMD GPU?

I have looked at the AMD CFX chart, its fairly logical in what I can do with various cards.

Suprised that is not a sicky here.

 



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