Overclock.net › Forums › Graphics Cards › AMD/ATI › Getting some strange behaviour with temperatures - could do with some help
New Posts  All Forums:Forum Nav:

Getting some strange behaviour with temperatures - could do with some help

post #1 of 6
Thread Starter 
I bought two reference 2GB 6950s the other day because my 5970 died, and I'm having some really strange problems.

The two cards are sandwiched together, and the top card is considerably hotter than the bottom card. I'm sure you're thinking that it's because they're sandwiched, but it isn't. That's what I originally thought, but taking the bottom card out completely, and even swapping them around yields the same result: whichever card is in the first slot is 25 odd degrees hotter than the bottom card.



This is after idling for a while. You can see that the temps are fairly stable at this point.



Here's everything else about the card. Both cards show the same information, as I've flashed them both with the same OEM 6970 BIOS, and that seems to be fine. I doubt the issue stems from that.

I'm also running a super new install of Windows 7 x64; I only have Chrome, Afterburner, and drivers installed. That's it.

Does anyone have any clue as to what this issue might be?
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
post #2 of 6
Quote:
Originally Posted by Custard View Post

I bought two reference 2GB 6950s the other day because my 5970 died, and I'm having some really strange problems.

The two cards are sandwiched together, and the top card is considerably hotter than the bottom card. I'm sure you're thinking that it's because they're sandwiched, but it isn't. That's what I originally thought, but taking the bottom card out completely, and even swapping them around yields the same result: whichever card is in the first slot is 25 odd degrees hotter than the bottom card.



This is after idling for a while. You can see that the temps are fairly stable at this point.



Here's everything else about the card. Both cards show the same information, as I've flashed them both with the same OEM 6970 BIOS, and that seems to be fine. I doubt the issue stems from that.

I'm also running a super new install of Windows 7 x64; I only have Chrome, Afterburner, and drivers installed. That's it.

Does anyone have any clue as to what this issue might be?

Try replacing the thermal paste maybe? It is due to the cards being sandwiched together though. Can you check the idle clock states/voltages of the card too? smile.gif

A photo of the cards (showing how close together they are) would be good too, also for debugging did you want to go back to the stock BIOS on each card?
For reference if you want to unlock you want to mod the stock BIOS too as the 6970 BIOS' can mess up other things on the cards.
 
Seven Seven Five
(12 items)
 
 
CPUMotherboardGraphicsRAM
Convertible i5 3570k (De-Lidded) Gigabyte Z77x-D3H XFX R9 290 With Koolance Block (1179/1450) 16GB G-Skill Ares 1866 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo Seagate Barracuda 2TB Western Digital Green 2TB Samsung Spinpoint 1TB 
Hard DriveOptical DriveCoolingCooling
Western Digital Green 640GB 2x OEM DVD Drives Heatkiller Rev 3.0 XSPC RX360 
CoolingCoolingCoolingOS
Laing D5 + XSPC Res Primochill Bloodshed Red Tubing Koolance Fullcover R9 290x Block Windows 10 Pro x64 
MonitorMonitorMonitorKeyboard
Asus VEH228H Asus VE228H Aavara TS742 Dual Monitor Stand Ducky Shine II Cherry Blue RED Backlit Mechanic... 
PowerCaseMouseMouse Pad
Silverstone Strider 850W HAF 932 Logitech G400 Gigabyte Ghost 
AudioOther
Microlab Solo6c Logitech C100 Webcam 
CPUMotherboardGraphicsRAM
Core 2 Quad Q6600 ASUS P5Q Pro Gigabyte 5870 4GB OCZ "Vista Upgrade" 
RAMHard DriveOptical DriveCooling
Corsair XMS2 4GB 1TB Samsung Spinpoint F3 Pioneer DVD/RW Noctua NH-U12P 
OSPowerCaseOther
Windows 7 Pro x64 Zalman ZM460B Antec 900 v1 Some Form of TV Tuner 
  hide details  
Reply
 
Seven Seven Five
(12 items)
 
 
CPUMotherboardGraphicsRAM
Convertible i5 3570k (De-Lidded) Gigabyte Z77x-D3H XFX R9 290 With Koolance Block (1179/1450) 16GB G-Skill Ares 1866 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo Seagate Barracuda 2TB Western Digital Green 2TB Samsung Spinpoint 1TB 
Hard DriveOptical DriveCoolingCooling
Western Digital Green 640GB 2x OEM DVD Drives Heatkiller Rev 3.0 XSPC RX360 
CoolingCoolingCoolingOS
Laing D5 + XSPC Res Primochill Bloodshed Red Tubing Koolance Fullcover R9 290x Block Windows 10 Pro x64 
MonitorMonitorMonitorKeyboard
Asus VEH228H Asus VE228H Aavara TS742 Dual Monitor Stand Ducky Shine II Cherry Blue RED Backlit Mechanic... 
PowerCaseMouseMouse Pad
Silverstone Strider 850W HAF 932 Logitech G400 Gigabyte Ghost 
AudioOther
Microlab Solo6c Logitech C100 Webcam 
CPUMotherboardGraphicsRAM
Core 2 Quad Q6600 ASUS P5Q Pro Gigabyte 5870 4GB OCZ "Vista Upgrade" 
RAMHard DriveOptical DriveCooling
Corsair XMS2 4GB 1TB Samsung Spinpoint F3 Pioneer DVD/RW Noctua NH-U12P 
OSPowerCaseOther
Windows 7 Pro x64 Zalman ZM460B Antec 900 v1 Some Form of TV Tuner 
  hide details  
Reply
post #3 of 6
Thread Starter 
Quote:
Originally Posted by Matt-Matt View Post

Try replacing the thermal paste maybe? It is due to the cards being sandwiched together though. Can you check the idle clock states/voltages of the card too? smile.gif

A photo of the cards (showing how close together they are) would be good too, also for debugging did you want to go back to the stock BIOS on each card?
For reference if you want to unlock you want to mod the stock BIOS too as the 6970 BIOS' can mess up other things on the cards.

No no no...
Both cards run hot in the top slot, and both run cool in the bottom slot. That means it's not due to dodgy paste. However, running either card in the top slot by itself runs pretty much just as hot as with a bottom card. With this information, we can establish that it's not due to an airflow issue.

I don't think it has anything to do with the BIOS, because one of my cards was already flashed, and was running fine. This same card runs really hot in the PC even by itself.
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
post #4 of 6
Thread Starter 
I've just discovered that the cards are running at different core and memory clocks. GPU1 is running at 500mhz core and 1375mhz memory, whereas GPU2 is running at 250mhz core and 150mhz memory. I'm thinking this may have a lot to do with it...

I'll run some games and Heaven and see what the temps do.
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
post #5 of 6
Thread Starter 
Under load, the GPUs are only 5 or 6 degrees apart. So basically, GPU1 is just running really hot at idle. I'll unplug my second monitor and see if that brings the idle clocks down, which might make a difference to the idle temp.
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
post #6 of 6
Thread Starter 
Unplugging my second monitor took the idle temps back to what I'd expect: about 10 degrees high than the second card.

Looks like I've worked out the 'problem'!
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 2500k Gigabyte P67A-UD7-B3 2x AMD 6950 (unlocked to 6970) 12gb Mushkin Silverline 1333 (3x4gb) 
Hard DriveCoolingMonitorPower
OCZ Vertex Plus 60gb RS240 w/ 2x GT AP-15 LG 22" W2243T Silverstone Strider 750 
Case
Fractal R3 Black 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › Getting some strange behaviour with temperatures - could do with some help