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Received second GPU
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  (#1)
lorikano
Master Guru
 
Videocard: 2x Sapphire 7950 w/boost
Processor: Core i5 3570k @4.2ghz
Mainboard:
Memory: 8gb DDR3 1600mhz
Soundcard:
PSU: corsair tx750 v2
Default Received second GPU - 09-07-2013, 11:50 | posts: 169 | Location: Surface of the Sun

Been testing 7950's and seems good but gpu's are very close together and the fist gpu temps go 81c while the second one is rather cool ~65c ,
my mobo is GIGABYTE GA-Z77MX-D3H LGA 1155 which means it's got 3 pie ,so my question is can I use the first pce and the third one so it have give it a little space ? Will I get a performance hit doing so? Your opinion is greatly appreciated
   
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Desde1988
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Videocard: VTX3D/Sapphire 7970 CFX
Processor: i7 2600k
Mainboard: Asus P8Z77-V Pro
Memory: 8GB Corsair XMS3
Soundcard: Asus Xonar DSX / Z5500
PSU: Corsair AX860i
Default 09-07-2013, 12:14 | posts: 10

Looking at your mobo's manual the pci-e layout seems to be x16, x1, x4 and x8 so I think you're supposed to use the top one and the bottom one for dual GPUs.

http://download.gigabyte.us/FileList...77mx-d3h_e.pdf Page 7.
   
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XBEAST
Maha Guru
 
Videocard: MSI GTX 770 Gaming
Processor: Intel Core i5 2500K
Mainboard: Gigabyte Z68A-D3
Memory: Patriot 12GB 1600MHz CL9
Soundcard: Realtek On-Board
PSU: Seasonic S12II-620 Bronze
Default 09-07-2013, 12:15 | posts: 1,599 | Location: Unknown

You will get a performance improvement because bottom slot is PCI-E 3.0 x8 while second slot you currently use is just PCI-E 2.0 x4
   
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  (#4)
lorikano
Master Guru
 
Videocard: 2x Sapphire 7950 w/boost
Processor: Core i5 3570k @4.2ghz
Mainboard:
Memory: 8gb DDR3 1600mhz
Soundcard:
PSU: corsair tx750 v2
Default 09-07-2013, 12:32 | posts: 169 | Location: Surface of the Sun

Quote:
Originally Posted by XBEAST View Post
You will get a performance improvement because bottom slot is PCI-E 3.0 x8 while second slot you currently use is just PCI-E 2.0 x4
Ok ,so what I will do now is run Heaven benchmark 4.0 and post results then later I'll move the second gpu to a lower slot and then post reults with same config.
   
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yasamoka
Ancient Guru
 
Videocard: 7970CF @ Qnix 1440p 110Hz
Processor: i7 930
Mainboard: ASUS P6X58D Premium
Memory: 6GB Corsair Dominators
Soundcard: Audio-GD NFB-11.32 +DT880
PSU: CM Silent Pro Hybrid 1300
Default 09-07-2013, 12:35 | posts: 3,110 | Location: Lebanon

You might not notice a difference even if there is a difference in other applications. If the second slot is x4 and the third slot is x8, win-win; Use the third slot and that's that.
   
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  (#6)
sekta
Member Guru
 
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Videocard: 3x HD7970 Tri-Fire
Processor: 4770k
Mainboard: Gigabyte G1. Sniper 5
Memory: GSkill TridentX 2133 16GB
Soundcard: Fiio E17->Corsair SP2500
PSU: Seasonic Platinum 1000w
Default 09-07-2013, 13:21 | posts: 84 | Location: NZ

Even if the bottom was x4 instead, it would be more beneficial to use it. The improvement in temps will far outweigh any performance benefit. In your case you get better performance and temperatures, even if it's only 2fps.
   
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  (#7)
lorikano
Master Guru
 
Videocard: 2x Sapphire 7950 w/boost
Processor: Core i5 3570k @4.2ghz
Mainboard:
Memory: 8gb DDR3 1600mhz
Soundcard:
PSU: corsair tx750 v2
Default 09-07-2013, 15:07 | posts: 169 | Location: Surface of the Sun

Ok resluts @ 1080p everything MAX , AA2X
score : 1563
FPS :62.1
MIN: 22.9
MAX 148

This bench was done with gpu's close together

I promised to provide results with 1st and 3rd slot pcie but I can't do that now due to my Corsair tx750 v2 being dead from the benchmarks, I guess higher power draws killed my PSU ,which begs my second question what's corsair warranty like ?

Last edited by lorikano; 09-07-2013 at 15:30.
   
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  (#8)
Desde1988
Newbie
 
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Videocard: VTX3D/Sapphire 7970 CFX
Processor: i7 2600k
Mainboard: Asus P8Z77-V Pro
Memory: 8GB Corsair XMS3
Soundcard: Asus Xonar DSX / Z5500
PSU: Corsair AX860i
Default 09-07-2013, 16:09 | posts: 10

Usually pretty quick. 5 years on TX PSUs.
Good luck dude.
   
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  (#9)
lorikano
Master Guru
 
Videocard: 2x Sapphire 7950 w/boost
Processor: Core i5 3570k @4.2ghz
Mainboard:
Memory: 8gb DDR3 1600mhz
Soundcard:
PSU: corsair tx750 v2
Default 09-08-2013, 10:41 | posts: 169 | Location: Surface of the Sun

I double checked the wires and PSU is fine ,
BUT I have a new problem and that the bottom slot is not detecting my second GPU ???!?!??!?
mobo gigabyte ga z77mx d3h

Any suggestions ?
   
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Old
  (#10)
yasamoka
Ancient Guru
 
Videocard: 7970CF @ Qnix 1440p 110Hz
Processor: i7 930
Mainboard: ASUS P6X58D Premium
Memory: 6GB Corsair Dominators
Soundcard: Audio-GD NFB-11.32 +DT880
PSU: CM Silent Pro Hybrid 1300
Default 09-08-2013, 11:17 | posts: 3,110 | Location: Lebanon

Tried one GPU (the first too) in that slot by itself?
   
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