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[Official Guide] Modifying/Removing NVidia GPU Heat Spreader/IHS - Page 8

post #71 of 257
I wish they would just leave it exposed like AMD does.
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post #72 of 257
Thread Starter 
Znarf,

Looks like you reached the end of your mod for the first card. I top out around 59-62C depending on room temp and my OC setting.

Its a great mod. Obviously its very dangerous but its nice actually modifying the parts and then having a 10C+ drop in temps!

Gnom,
Yea I know. I see charts of ATI cards running lower temps than Nvidia and thats probably so because of this heat spreader issue.
My guess, they add the heat spreader to protect the chip. Maybe ATI has more damaged chips by vendors...I don't know, and Nvidia is trying to be proactive in reducing the margin of error for bad chips...? Since older chips seem to be without this heat spreader. That would be my only guess. It's just proactive safety measures to reduce the cost of ruined chips. Think, it's probably a good 5-10% cheaper to just add a 2mm piece of copper to the chip and glue that down than have to replace chips on cards that have been damaged in production. If I had to point to a reason, that's my reasoning....But that's just the business side of me talking...I could be wrong, it could be some engineering spec? who knows
post #73 of 257
Quote:
Originally Posted by Cakewalk_S View Post

Znarf,
Looks like you reached the end of your mod for the first card. I top out around 59-62C depending on room temp and my OC setting.
Its a great mod. Obviously its very dangerous but its nice actually modifying the parts and then having a 10C+ drop in temps!
Gnom,
Yea I know. I see charts of ATI cards running lower temps than Nvidia and thats probably so because of this heat spreader issue.
My guess, they add the heat spreader to protect the chip. Maybe ATI has more damaged chips by vendors...I don't know, and Nvidia is trying to be proactive in reducing the margin of error for bad chips...? Since older chips seem to be without this heat spreader. That would be my only guess. It's just proactive safety measures to reduce the cost of ruined chips. Think, it's probably a good 5-10% cheaper to just add a 2mm piece of copper to the chip and glue that down than have to replace chips on cards that have been damaged in production. If I had to point to a reason, that's my reasoning....But that's just the business side of me talking...I could be wrong, it could be some engineering spec? who knows

Yeah I think so, but will try to test again sometime tomorrow and see the temps, as for the moment I'm seeing a 10C difference between GPU1 (top slot) and GPU 2 (middle slot) on my board sandwitch between my 280 on the bottom slot, which is supposed to be warmer compared to GPU 1? but anyway I'll be running the test again and will see what the temps are.

cheers,

znarf
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post #74 of 257
Guess whose been folding for the past 2 days at only 57c, and has 2 thumbs?


This guy.


smile.gif
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post #75 of 257
400400
Quote:
Originally Posted by Gnomepatrol View Post

I wish they would just leave it exposed like AMD does.

yeah, guess what? just took off the IHS on my GPU1 and got a new OCCT 3.0.0 test graph which is quite amazing at 68C / 64C. Those OCCT test graph below are the result from my 2nd IHS lapping and on the top are the test graph when i took off the IHS on GPU1 its also kind of weird reading with OCCT 3.0.0 during the test that GPU2 temps jump to almost 100C? while I know on previous test that only GPU1 got problem with the temps?rolleyes.gif could it be a bug? while on my latest test with GPU 1 IHS off and everything is running simultaneously MSI AB, HWmonitor and still got good result? any idea? 400400
Edited by znarf - 11/18/11 at 4:47pm
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post #76 of 257
Thread Starter 
Run Heaven 2.5 benchmark with the OSD on and check your temps. Just run OCCT again. maybe try the 4.0 OCCT....?

If its a temp issue you may want to reseat the heatsink and reseat the IHS...Just to make sure its done right...ya never know if it slid when you were screwing in the screws to the heatsink or something?
post #77 of 257
Quote:
Originally Posted by Cakewalk_S View Post

Run Heaven 2.5 benchmark with the OSD on and check your temps. Just run OCCT again. maybe try the 4.0 OCCT....?
If its a temp issue you may want to reseat the heatsink and reseat the IHS...Just to make sure its done right...ya never know if it slid when you were screwing in the screws to the heatsink or something?

yeah, done Heaven 2.5 benchmark at 1000Mhz/2000Mhz @1.1mV and below are the results with GPU1 and GPU2 max temps at 51C/54C with ambient temp of 27C not bad:thumb: so I guess this would be it. Again thanks for the guide and to Gnome for suggesting to take out the IHS. below are screen shots taken after the benchmark.377338
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post #78 of 257
So after some time with this mod i was getting some strange temp readings. Large spikes in temps to be exact. My temps could be as low as 20c but spike to 36c and benchmarking was creeping up to the 62c more often than i liked. I had some time to play with the pc today and decided to rip my gpu down and take a peek. I was quite shocked when i got the IHS removed and saw what had happened to the TIM. Ive put alot of TIM on and ive never seen TIM do what i saw today. The center portion of the chip was void of all TIM, not a bit was there. I whiped the center with my finger and it almost came away clean, just a little of a stain on my finger tip. The same with the bottom side of the IHS, the side which touches the chip to was void of TIM. When looking at both pieces it was pronounced by a complete round circle bear metal. Seems that the chip itself is ever so slightly rounded on the top and its like the TIM flowed out to the edges of the chip leaving the centre bare... i was like ***. I know i put it there as i spread it with a card and then add a drop to the middle for good luck. So that would explain my temp issues as it was a pocket of hot air surrounded by TIM tongue.gif

I used AS5 for the IHS mod the first time. AS5 i found to be difficult to work with as its like using peanut butter. I managed to get some MX4 today and used that instead of the AS5. It was much better IMO. I was about to put it all together when i made the desision to see what would happen if i left the IHS off and just mount my H70 right to the chip. Im now running the Matrix 580 without the IHS and there seems to be no bad effects because of it. With replacing the TIM and removing the IHS im seeing temps now in the very low 20s and NO SPIKES. five hours of Skyrim (ultra/1080p) and max temps were 46c. Benchmarking Heaven 2.5 temps reached max 48c. The same benchmarking and gaming would have reached 62c before. The card has a stock oc on it at 816mhz, little more than a referance card. Currently im sitting at 24c. Its nice to have my low temps back again. I just wanted to post in as a reference to this thread as id mentioned before about the temp issues thumb.gif

Ill leave the pc running tonight and see what ill have for lows in the morning. Im hoping for 20c again....or lower. Its funny as my 580 pushed hard is still 1c cooler than my cpu which is oc to 3.9ghz
post #79 of 257
I kinda wanna do this to my 590. haha
 
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post #80 of 257
Crazy awesome@@@ I am likely going to try this out. I have heard of IHS removals on CPUs, but never GPUs... Really top-notch OCN quality stuff. rep'd
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