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5770 TriFire question and something heat related

post #1 of 3
Thread Starter 
Hey guys I tried to search for this but I couldn't find it. My searching skills in forums isn't exactly very good though so I apologize in advance if this was an easy question.

I got another thread going in the intel boards about my i7 920, but I have an ati/amd 5770 hd radeon related question this time!

I run trifire 5770s, all of them are from Sapphire, identical in every way, except their age. One of the cards is about a year older than the other two. It also runs the hottest. I think it is because it has a larger plastic shroud on it, and unfortunately for the card, about 6 months ago, a large chunk of dust wedged itself in the heatsink which prevented it from cooling properly. I am not sure how long that went on for but I when I finally took it apart, cleaned it and reapplied thermal compound I got it to run about 10-20 degrees cooler.

My cards all run stock speed 850Mhz/1200Mhz. I can't overclock them since I run a three monitor setup and the other two screens flicker. I think I've read on here that if you change something in to the bios for the idle clocks that will stop that from happening but I have only seen that talk about for 5800s and higher never for the 5700. Maybe I am just blind

Well anyway here are my questions.

What would a safe temperature be for running this setup? Right now in high stress environment (benchmarks like 3dMark or Heaven's) the cards will bounce between 70-80 with the oldest card spiking as high as 90. Last night the oldest card actually almost hit 100 C but I immediately shut down the computer manually when I saw that. I took the card apart to check for any dust blockage, cleaned off the older thermal paste and reapplied more. So far the card hasn't gone above 90 but still operates hotter than the other 2.

My second question is in my trifire setup I have the oldest card in the middle of the crossfire bridges. It goes top down newer card -> oldest card -> newer card. My motherboard's manual states that the top most pci-e slot is the primary slot with the other 2 being the secondary ones for the setup. I also have all my monitors hooked into the top card. However, MSI Afterburner is reporting the middle card as GPU1. So should I swap the cards around and see if that takes some stress off the oldest card? I don't want that one being the primary gpu, if anything I probably should move it to be the "3rd card" no?

Sorry for the wall of text!
Edited by shandi235 - 8/18/11 at 7:57am
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 3.6Ghz ASRock X58 Extreme Radeon HD 5770 x3 G.SKILL Ripjaws Series 12gb (3x4) DDR3 1333 
Hard DrivePower
1tb WD Caviar Black 1000-W 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 3.6Ghz ASRock X58 Extreme Radeon HD 5770 x3 G.SKILL Ripjaws Series 12gb (3x4) DDR3 1333 
Hard DrivePower
1tb WD Caviar Black 1000-W 
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post #2 of 3
At 90c its operating hot, but that's to be expected with trifire setups - I would move your "oldest" card to the bottom slot, since its already the one that gets the hottest, might as well get it the most air so as to not compound the problem. You may also want to try and insert a "spacer" such as a piece of cardboard to hold them apart and get a bit more air in there to each GPU.
The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
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The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
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post #3 of 3
Thread Starter 
Thanks thanks I moved some stuff around in the case to get better air flow, I also dropped the oldest card into the lowest slot.

Now I am getting a BSOD when I try to enable crossfire, System Service Exception BCCode: 3b something about win32k.sys

Did I just break Windows? Or did the oldest card finally kick the bucket

edit: it seems this bsod only gets thrown when I try to enable trifire, when I go into crossfire just two of the cards windows stays happy

edit 2: looks like disabling crossfire over 2 gpus then hitting apply then hitting enable xfire over 3 gpus did the trick. It didn't throw a BSOD, now to get on with the testing...

edit 3: and no sooner do I get it enabled and run Heaven's benchmark does the 3rd card shoot right up to 100 C again. I shut it down and just pulled the card out. I will go dual for a while until I can get the $ to upgrade... I think the card is dying and I dont want to risk bringing any other part of my computer down with it

edit 4: now my previously middle card is spiking in temp. I think the damage has been done. Instead of trying to save this by replacing with another 5770 or whatever I am cutting my loses and going with the 560 Ti gonna try out nvidia for a while and see if I like it, if not well there is the 30 day RMA
Edited by shandi235 - 8/19/11 at 8:03am
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 3.6Ghz ASRock X58 Extreme Radeon HD 5770 x3 G.SKILL Ripjaws Series 12gb (3x4) DDR3 1333 
Hard DrivePower
1tb WD Caviar Black 1000-W 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 3.6Ghz ASRock X58 Extreme Radeon HD 5770 x3 G.SKILL Ripjaws Series 12gb (3x4) DDR3 1333 
Hard DrivePower
1tb WD Caviar Black 1000-W 
  hide details  
Reply
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