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PWM cooling probs, please help

post #1 of 6
Thread Starter 
I removed the Heatpipe cooling on my AB9 Quad GT, and replaced the thermal pads with Artic Silver 5. My Northbridge is making good contact, but I'm having trouble with the PWM sink. The best temps I can get after three tries (making sure that the sinks were as flat and lined up as possible) is PWM 1 & 5 idle 47C, PWM 2 & 4 idle 56C, and PWM 3 idle @ 68C. I think 47C is not too bad, but the others especially PWM 3, bother me. I'm really frustrated at this point and am considering replacing the stock heatpipe cooling with after market coolers. Any suggestions with stock or after market?
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post #2 of 6
The factory finish on the PWM's are always terrible--hence the reason to why they use thermal pads. Go get some new thermal pads and remount it... you definely shouldn't be getting those temps
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#well
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post #3 of 6
There is a small clear tape on the bottom of the PWM cooler. If you remove that tape it will lower the PWM heatsink just enough to make better contact with the PWMs.

However, the PWM heatsink in general is not very good.
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by pauldovi View Post
There is a small clear tape on the bottom of the PWM cooler. If you remove that tape it will lower the PWM heatsink just enough to make better contact with the PWMs.(
Thanks for the help. There is a ring of clear tape not quite a mm thick that I left on there (I figured it was there to keep the heatsink from contacting the little diodes that surround the PWM's).

Back on my first attempt I had horrible temps, then I realized that the little rubber standoffs(feet) on each end by the mounting holes were keeping the sink an extra mm or so off the board, so I removed them, and it made a big difference (Before that, I wasn't even making contact with the PWM's).

I guess when I get some time, I'll remove my mobo from my case "again," and take that clear tape off. What do y'all think about the Thermalright PWM heatsink? Is it worth it? I mean since I'm going to the trouble of removing my board again anyway.
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Abit IP35-Pro
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WD Raptor 150GB; Seagate ES 320GB Pioneer 18x DVR-212DBK Windows XP Pro SP3 Samsung 19" Wide LCD 
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post #5 of 6
Quote:
Originally Posted by kevinm207 View Post
Thanks for the help. There is a ring of clear tape not quite a mm thick that I left on there (I figured it was there to keep the heatsink from contacting the little diodes that surround the PWM's).

Back on my first attempt I had horrible temps, then I realized that the little rubber standoffs(feet) on each end by the mounting holes were keeping the sink an extra mm or so off the board, so I removed them, and it made a big difference (Before that, I wasn't even making contact with the PWM's).

I guess when I get some time, I'll remove my mobo from my case "again," and take that clear tape off. What do y'all think about the Thermalright PWM heatsink? Is it worth it? I mean since I'm going to the trouble of removing my board again anyway.
The thermalright heatsinks do not fit the QuadGT.

My suggestion is going to the hardware store and getting a screw that will fit through the hole. It would be much tighter if it were bolted on instead of held by a spring. That would probably give you better temperatures.
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post #6 of 6
Paul is right. What I did was take that clear tape off and then put those little black corner spacers back on, it worked perfectly then with some as5, all of them idled around 47c within 4c of each other. Max load was about 65c which is pretty good with this board.
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