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Mutilated CNPS7000-CU CPU cooler on a 6600GT

post #1 of 10
Thread Starter 
Just thought that I would share a mod with you all. It was a complete pain and more-or-less pointless, but what else did I have to do? So I had a leftover CNPS7000-Cu, weighing in at a bulky ~1.5 lbs, and had a XFX 6600GT sitting around... I figured they were meant to be together (with the help of some leftover Big Typhoon mounting hardware).

It is not the prettiest mod ever (or even pretty at all), but it worked.

First I tried to simply mount the cooler on the card. Surprisingly, sets of hole lined up almost perfectly and mounting was the easy part. The problem was that the heatsink and fan were too large and contacted the motherboard/PCI slots (the card could not be plugged in).

The only solution was to try to remove the fan and some of the fins on the heatsink... After about 3 hours with a pair of pliers, I have successfully ripped off about 30-40 fins in the area that contacted the motherboard, and ended up with something that seemed like it may work (without a fan though).

It did indeed fit in the slot (and boot up without a problem). So I went ahead and did a little wolt mod and took it up to 1.6-1.7V with a pencil mod. I was able to get to 590/1200MHz, but that it about it. I guess I have been spoiled by my 7900GS. The temps would reach the mid 60s without a fan blowing directly on the heatsink (and that think does put out some major heat).

All in all it was a fun (if not pointless) exercise in modding. I think at 590/1180MHz I was able to hit ~4300 in 3dMark05. Not too shabby, but pretty weak compared to anything new.

I hope you enjoy the pics. You can see the mutilated heatsink in picture 4, and the in-case installed view in picture 5.
LL
LL
LL
LL
LL
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post #2 of 10
I like it, that huge cooler on the video card looks great, and you can't even see the ugly part.
post #3 of 10
fancy...... you should bench it to whatever cooling you have on the 7900
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post #4 of 10
Thread Starter 
Yeah... i thought about benchmarking it, but it would be a bit of a pain. Right now, it is essentially an oversized VF700 without a fan. You can definitely tell that it has a large thermal mass because it take quite a while for the temp to flatten out (much longer than the VF900 i have on the 7900GS).

I really need to put some sort of fan on the heatsink to make it perform the best. The stock fan is a bit too large and would hit a PCI slot. I could possibly just grind down the fan blades a bit and put it on. I could also just strap on an 80mm fan in an ad-hoc manner. Maybe I will have some time in a near future...
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post #5 of 10
Man I lol'd at the hack job on the fins, looks like Alien blood dripped on them.

Pretty ingenius mod, I hope you screwed down the slot cover, creating alot of stress on the bus if you didn't.
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post #6 of 10
That's great! There are some really cool mods/ideas around these forums, me likey
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post #7 of 10
Thread Starter 
Quote:
Originally Posted by grunion View Post
Man I lol'd at the hack job on the fins, looks like Alien blood dripped on them.

Pretty ingenius mod, I hope you screwed down the slot cover, creating alot of stress on the bus if you didn't.
Thanks... This is when I wished I have some real tools, like a real grinder, or something that could cut through the fins like butter. I tried hacksawing them to make it neater, but got about 1cm in after 20mins and decided that it sucked. So I did what you see, hence the word "mutilated."

I always had the case laying on its side, so I never have to work about stresses too much. If I turn it upright, I would want a standoff from the free corner of the card to the bottom of the case for support.

Maybe I will get around to putting a fan on it in the near future. The original zalman fan is just a little too big. I may be able to grind down the fins a bit to make it work... it may be interesting to try.

I will post more pics if anything changes.
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post #8 of 10
Thread Starter 
Well, I cut down the original CNPS7000 fan so that it would fit in above the PCI slots. I had to cut off about 1cm off of each fan blade, so I am sure that it is pretty inefficient now... but it did help the temps a lot.

I now hit a max temp of about 54 degC and can run at 590/1200MHz stable. Aquamark score is around 66000 with a 2.6GHz AMD X2.
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post #9 of 10
As far as mounting, AS epoxy would have been better.
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post #10 of 10
Thread Starter 
Quote:
Originally Posted by Mr Bear View Post
As far as mounting, AS epoxy would have been better.
You think it would hold a cooler that weighs about 1.5 lbs?
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