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2x GTX 560 SLI Heat problem

post #1 of 41
Thread Starter 
Hey everyone,

the CPU fans are blowing against each other (towards the center/up and down). you can see the orientation in the pics. It doesn't fit left-to-right due to the ram cooler being in the way. ALL fans in the case are set to 100%

- I'm using MSI afterburner with the 2500K @ 4.4GHz and the 560's @ 915MHz
- The GPU's have two big fans on each GFX card. The side case fan is blowing towards them.
- I cant tidy up the cabling much more, there are 6 hard drives in there. My PSU also NOT being modular is also a PITA.
- Full pics and specs can be clicked on in my sig.

My top graphics card runs 20*C hotter than the bottom, is that normal for SLI?

top card sits on around 75-80 degrees and bottom one around 55-60*C (testing with assassins creed revelations) 3DMark tests run around 5-10 degrees cooler. my CPU stays between 55-70*C, I have NOT increased voltages for these tests on my graphics card, if i do however turn speed to 960MHz which needs increase by 0.1v to become stable, the top card gets up to 90*C

I think It may have something to do with my fan setup. Maybe they are pointing in the wrong directions or something... I have also tried forcing the primary GPU to be the bottom card using MSI afterburner, this makes little to no difference. I have physically swapped the cards around too and still the top card gets the hottest...

I'd love to see what you guys thoughts are, thanks!
Edited by randomskate - 1/24/12 at 6:47pm
My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
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My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
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post #2 of 41
normal
post #3 of 41
Need to strap Antec Kuhler 620's on them.
post #4 of 41
Yep - nature of the SLI beast, unfortunately.

You have a side case fan on that panel. What is it's speed and CFM?

May want to consider a Scythe UK 2000 or 3000 fan for some extra grunt.

OR as Xinoxide suggested, a hydro mod.
post #5 of 41
Thread Starter 
thanks, here are the side fan specs, its a Thermaltake AF0030 120mm Red LED Thunderblade Fan - Sleeve Bearing - 1800rpm

Fan Dimension
120 x 120 x 25 mm
Started Voltage
?9V
Rated Voltage
12V
Power Input
3.6W(Max)
Rated Current
0.30A
Fan Speed
1800±10%R.P.M.
Max. Air Flow
70.2CFM
Max. Air Pressure
2.41MM-H2O
My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
CaseMouseMouse PadAudio
Antec Nine Hundred Two Version 3 Gaming Case Logitech G500 Razer Goliathus Logitech 5.1 Surround 
  hide details  
Reply
My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
CaseMouseMouse PadAudio
Antec Nine Hundred Two Version 3 Gaming Case Logitech G500 Razer Goliathus Logitech 5.1 Surround 
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post #6 of 41
Quote:
Originally Posted by randomskate View Post

thanks, here are the side fan specs, its a Thermaltake AF0030 120mm Red LED Thunderblade Fan - Sleeve Bearing - 1800rpm
Fan Dimension
120 x 120 x 25 mm
Started Voltage
?9V
Rated Voltage
12V
Power Input
3.6W(Max)
Rated Current
0.30A
Fan Speed
1800±10%R.P.M.
Max. Air Flow
70.2CFM
Max. Air Pressure
2.41MM-H2O

Hmmm... I had a 50 something cfm fan on my side panel for my single card. I strapped in a UK 2000 and it dropped the GPU temps down a further 5c. Something to consider anyways smile.gif
post #7 of 41
Thread Starter 
I'm going to buy this fan: http://www.mwave.com.au/sku-18010310-Scythe_Ultra_Kaze_120mm_Case_Fan_3000RPM_(DFS123812H-3000)

3000 instead of 1800 RPM on the side fan should hopefully help cool it a bit.

While looking, I came across this one: http://www.mwave.com.au/sku-18010414-Cooler_Master_Excalibur_120mm_Fan_Barometric_Ball_Bearing_600-2000RPM_Speed_(R4-

It looks a little better to me, but i'm not sure, is there any other 120mm fans that have more power that i should be looking at?
My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
CaseMouseMouse PadAudio
Antec Nine Hundred Two Version 3 Gaming Case Logitech G500 Razer Goliathus Logitech 5.1 Surround 
  hide details  
Reply
My PC
(20 items)
 
Photos of My PC
(17 photos)
 
CPUMotherboardGraphicsGraphics
2500k @ 4.5Ghz Gigabyte GTX 560 @ 915Mhz GTX 560 @ 915Mhz 
RAMHard DriveHard DriveHard Drive
Corsair Vengence 16GB Kit + Dominator Airflow fan 120GB OCZ VERTEX3 Seagate Barracuda 1TB x 3 Seagate Barracuda 2TB x 2 
Optical DriveCoolingCoolingCooling
ASUS DVDRW NZXT Sentry Touchscreen Fan Controller Coolermaster CPU Cooler Corsair 
OSMonitorKeyboardPower
Win7 x64 27" AOC LED 2ms 1080p LCD Logitech G15 Thermaltake Litepower 700W 
CaseMouseMouse PadAudio
Antec Nine Hundred Two Version 3 Gaming Case Logitech G500 Razer Goliathus Logitech 5.1 Surround 
  hide details  
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post #8 of 41
Quote:
Originally Posted by randomskate View Post

I'm going to buy this fan: http://www.mwave.com.au/sku-18010310-Scythe_Ultra_Kaze_120mm_Case_Fan_3000RPM_(DFS123812H-3000)
3000 instead of 1800 RPM on the side fan should hopefully help cool it a bit.
While looking, I came across this one: http://www.mwave.com.au/sku-18010414-Cooler_Master_Excalibur_120mm_Fan_Barometric_Ball_Bearing_600-2000RPM_Speed_(R4-
It looks a little better to me, but i'm not sure, is there any other 120mm fans that have more power that i should be looking at?

The only down side with the UKs is the noise. If you hook them up to some sort of fan controller that will take care of that.

The excalibur looks okay too
post #9 of 41
The very reason why i bought the ga 990 xa ud3. The extra slot between the card for extra cooling. The temp between cards is never higher than 3C.
    
CPUMotherboardGraphicsRAM
1055T @ 3.5ghz GA-990XA-UD3 xfx 6850 crossfire 940/1150 @ 1.181v 2133mhz G skill 2x4gig 
Hard DriveOptical DriveCoolingOS
500gb + 250gb DVD drive Cooler master Hyper TX3 Win 7 
MonitorKeyboardPowerCase
23.6'' Asus HDMI + 17'' NEC  Microsoft 750W OCZ Antec 
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optical none Microsoft life chat 3000 
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1055T @ 3.5ghz GA-990XA-UD3 xfx 6850 crossfire 940/1150 @ 1.181v 2133mhz G skill 2x4gig 
Hard DriveOptical DriveCoolingOS
500gb + 250gb DVD drive Cooler master Hyper TX3 Win 7 
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post #10 of 41
It's quite normal to have a temperature difference between them. But not that much, i'd suggest switching your side fan around as the windforce cards are designed different to other cards. They're designed to dump their excess heat in the case and not out the back. (While they do pull cool air in from the back).

That would help your temperatures alot! Along with having both fans around the same way.. I.E One pushing air through and one pulling it through!
I assume you have the Hyper 212+ or EVO?

If so, you may be inclined to get some electrical tape and put on the sides of the fins. As this keeps the airflow in a channel and can drop temps a little.

Goodluck with it!
Oh, and let us know how it goes! wink.gif

EDIT:
Quote:
Originally Posted by veyron1001 View Post

The very reason why i bought the ga 990 xa ud3. The extra slot between the card for extra cooling. The temp between cards is never higher than 3C.

My board has a single gap too, i got the cards to have no temp difference!
If crossfire is working, i can assume that when ones at 60c the other is too!

But in reality my temps are about 72c at full load!
 
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Seven Seven Five
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CPUMotherboardGraphicsRAM
Convertible i5 3570k (De-Lidded) Gigabyte Z77x-D3H XFX R9 290 With Koolance Block (1179/1450) 16GB G-Skill Ares 1866 
Hard DriveHard DriveOptical DriveCooling
Samsung 840 Evo Seagate Barracuda 2TB 1x OEM DVD Drives Heatkiller Rev 3.0 
CoolingCoolingCoolingCooling
XSPC RX360 Laing D5 + XSPC Res Primochill Bloodshed Red Tubing Koolance Fullcover R9 290x Block 
CoolingOSMonitorMonitor
XSPC EX360 Windows 10 Pro x64 Asus VEH228H Asus VE228H 
MonitorKeyboardPowerCase
Aavara TS742 Dual Monitor Stand Ducky Shine II Cherry Blue RED Backlit Mechanic... Silverstone Strider 850W Thermaltake Core x71 Tempered Glass Riing Edition 
MouseMouse PadAudioOther
Zowie FK1 House of Stealth Microlab Solo6c Logitech C100 Webcam 
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Cooling
Some 120mm fan 
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