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 Post subject: SLI question...
PostPosted: Wed May 15, 2013 5:27 am 
Klamath
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I'm asking this question on behalf of a coworker of mine. The individual in question build a computer with a MSI Z77A-G41 motherboard shown here:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130653&Tpk=MSI%20Z77A-G41&IsVirtualParent=1

He chose a EVGA GTX 670 (the 4GB version) as his GPU. He has recently upgraded to a 30" (2560 x 1600) monitor and would like to purchase a second GTX 670 to run in SLI. The question is; will it work? MSI's website says the board is Crossfire compatible, but does not specifically mention SLI.

I remember running SLI (dual GTX 280's) several years ago on a similar board (it also said Crossfire, but did not mention SLI), but times have changed and I haven't kept up with the various motherboard manufactures.

Any advice would be greatly appreciated.
~mm


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 12:51 pm 
Team Member
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Seriously doubt it will support SLI---here are the slot configurations from MSI.

Slots

• 1 x PCIe 3.0 x16 slots
- PCI_E2 supports up to PCIe 3.0 x16 speed
• 1 x PCIe 2.0 x16 slot
- PCI_E4 supports up to PCIe 2.0 x4 speed
• 2 x PCIe 2.0 x1 slots
• 2 x PCI slots


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 2:18 pm 
Smithfield
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Well, the electrical interface shouldn't be bad, but if the board documentation doesn't explicitly say it supports SLI, it probably doesn't.


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 2:27 pm 
Klamath
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Thank you both for your replies. Do you see any merit in the third paragraph here:

http://www.hardocp.com/article/2012/09/10/msi_z77ag41_lga_1155_motherboard_review/#.UZQLhKPFJtY


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 2:43 pm 
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It might support it but it will be crippled, as you can see from the slot config that I posted above, the 2nd PCIE 16X slot actually runs at 4x.


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 2:47 pm 
Smithfield
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http://www.techpowerup.com/reviews/Inte ... s_Scaling/

Graphics cards aren't crippled until start going below PCI-Express 2.0 x4 speeds. And even then it's not even much of a cripple in some cases.


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 7:44 pm 
Bitchin' Fast 3D Z8000
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mrmarrero wrote:
Thank you both for your replies. Do you see any merit in the third paragraph here:

http://www.hardocp.com/article/2012/09/10/msi_z77ag41_lga_1155_motherboard_review/#.UZQLhKPFJtY


I'm kind of believing hardocp on this one. The deal is though that it only supports 2 cards.

The way I understood the technology, both the board and the PSU had to support this, the board isn't the only thing here...

In light of what was presented in the beginning, I don't see why you need a second card for that 30 inch monitor. 2560 x 1600 should run fine through a single dual-link DVI connection.


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 Post subject: Re: SLI question...
PostPosted: Wed May 15, 2013 8:08 pm 
Smithfield
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2560x1440/1600 is usually when games start choking even with a 670


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 Post subject: Re: SLI question...
PostPosted: Thu May 16, 2013 4:32 am 
Klamath
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Thank you all for your replies. And yes, games (Far Cry 3, Metro Last Light, etc.) are choking at 2560 x 1600 with the single 670.

I guess worst case scenario, if he must have the second card a new motherboard is in his future. Any suggestions for a SLI capable relatively inexpensive motherboard?


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 Post subject: Re: SLI question...
PostPosted: Thu May 16, 2013 9:54 am 
Smithfield
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Anything by Gigabyte, MSI, or ASUS within your price range and says it supports SLI I guess.


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 Post subject: Re: SLI question...
PostPosted: Sun May 19, 2013 9:20 am 
Klamath
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If the motherboard isn't listed to do SLI then I'd consider swapping out the 670 for a 690 or Titan and be sure it'll work. just my two cents. That or go for a pair of nice Radeon HD 7000 series (7790 and higher) cards in.....Crossfire !


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 Post subject: Re: SLI question...
PostPosted: Sun May 19, 2013 9:28 am 
Smithfield
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I'd hold off on Crossfire until AMD fixes the microstutter issue.


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 Post subject: Re: SLI question...
PostPosted: Sun May 19, 2013 9:36 am 
Klamath
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Me too, but a nicely high powered nVidia card will do the trick for the OP, I've tried to run a pair of 7770's in a Asus P8Z77-V LX board....wasn't pretty and the board is Crossfire compat, just not SLI compat.


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