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  #111 (permalink)  
Old April 1, 2009, 10:24 AM
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Alright got my second batch today, turns out my method didnt work so well either lol. What i ended up having to do is remove the retention bracket, apply the tim normally (spot in centre and press straight down with the heatsink), although i added about 20-30% more because of the hdt cooler, THEN insert the retention bracket and try and get it locked on. Gotta say it was pretty horrible to do lol, just spent about an hour trying to get that thing in there and locked down. Anyways temps already seem slightly better, ill load it up with prime for a few hours and see what improvement i get.

IC7
Ambient Temp: 20
Idle Temp: xx
Load Temp: 39-40


Wow, its hovering between 39-40c after 2 hours of prime95. That makes an improvement of 6-7c over the stock paste and a 4c difference with proper application Will add in load temps in the morning once the PC has idled for a a few hours, im expecting something around 26c based on this
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Last edited by Jonwall; April 1, 2009 at 12:16 PM.
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  #112 (permalink)  
Old April 1, 2009, 12:44 PM
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Question. Why is so much more paste required compared to other brands? Pea sized vs rice sized I mean. Cant say I have used a pea sized amount of tim in my life.
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  #113 (permalink)  
Old April 1, 2009, 01:47 PM
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Hi all,

Here are my results. Measurements were done with CoreTemp 0.99.1 for CPU and RivaTuner for GPU.

BFG GeForce 8800GT OC 512 MB (stock clocks: 625/900)with Arctic Cooling Accelero S1 and turbo module
Load testing was done with GPU Folding (For HWC of course )
Pre-IC7
Compound: Arctic Cooling MX2
Ambient Temp: 20C
Idle Temp: 41C
Load Temp: 47C

IC7
Ambient Temp: 20C
Idle Temp: 41C
Load Temp: 44C


No difference on idle temp but -3C difference under load.

CPU: E8400 at stock speed and cooled with Intel HSF of a Q6600.

Pre-IC7
Compound: Arctic Silver 5
Ambient Temp: 20C
Idle Temp: 32C
Load Temp: 48C

IC7
Ambient Temp: 20C
Idle Temp: 31C
Load Temp: 47C

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  #114 (permalink)  
Old April 1, 2009, 02:21 PM
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Eldonko

I have know idea why they recommend a grain if rice. To answer your question with a little more detail I just put a grain of rice sized application of a random competitor's creme type paste on a simulated IHS piece of copper plate between two glass slides when clamped with 4 binder clips about (50-60 PSI) It spread about halfway to the edge then it developed little Amoeba like extensions which reform together trapping air. I have detailed this effect on the innovationcooling.com applications page but never tried it with just a grain of rice size with a competition grease but the affect holds up.Took all of 3 -10 seconds from start to finish after clamping. If I was clever and had my own review site I would make a movie of it with a bunch of pastes and post it.

The air bubbles cause a failure in the grease, Under pressure and heat they expand creating voids and early failure of the compound. Air is also an insulator, so in effect your sink is ridng on a cushion of air. This effect will impact performance and greatly decrease the long term reliability of your mount.

I doubt that I am the first to be aware of this airmixing effect, most OEM silkscreen the compound on so they must have had a reason and I am sure you can find a publication of it somewhere, adheshives are much studied, probably some old report laying around if you had an interest.

Last edited by ICD7; April 1, 2009 at 02:29 PM.
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  #115 (permalink)  
Old April 1, 2009, 02:30 PM
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Ive always found a rice grain to work fine. All I do is spread it around a bit with the tip of the tube and squish with the HS first by hand with extra pressure then with connectors. Pea just sounds like waaay too much to the extent that it will be coming out from around the CPU. Im assuming you have tested that this much paste is not counter productive?

When I remove my block Ill post a pic of how it distributes.
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  #116 (permalink)  
Old April 1, 2009, 02:33 PM
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Quote:
Originally Posted by Eldonko View Post
Ive always found a rice grain to work fine. All I do is spread it around a bit with the tip of the tube and squish with the HS first by hand with extra pressure then with connectors. Pea just sounds like waaay too much to the extent that it will be coming out from around the CPU. Im assuming you have tested that this much paste is not counter productive?

When I remove my block Ill post a pic of how it distributes.

I will take some picture's tomorrow and post it
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  #117 (permalink)  
Old April 1, 2009, 04:07 PM
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Im assuming that some companies recommended grain of rice sized amounts because they were conductive, and if any came out the edges it may damage components. Also not sure of the effects on temps on say a older single core cpu vs a quadcore, im assuming more coverage will show a bigger difference on a quad but not too sure. I know my paste on the first time using slightly more than a pea size amount went over the edges a tiny bit but personally id rather have that than not have total coverage, which seems to have made a BIG difference in my temps.
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  #118 (permalink)  
Old April 1, 2009, 04:48 PM
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Quote:
Originally Posted by Jonwall View Post
Im assuming that some companies recommended grain of rice sized amounts because they were conductive, and if any came out the edges it may damage components. Also not sure of the effects on temps on say a older single core cpu vs a quadcore, im assuming more coverage will show a bigger difference on a quad but not too sure. I know my paste on the first time using slightly more than a pea size amount went over the edges a tiny bit but personally id rather have that than not have total coverage, which seems to have made a BIG difference in my temps.

Makes sense
The IHS is a heat spreader by definition. Heat flows from hot to cold, so a full contact is best especially for the direct contact heat pipes. If you put a thermocouple on the edge of an IHS you will find a good amount of heat so heat is being transferred to the edges. The material is not all that thick and probably starting to encroach on a point of diminishing returns but every degree counts.
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Old April 1, 2009, 06:28 PM
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Looks like some great results here folks, both on the TIM and the participation. I'm looking forward to playing with my tube(s) this weekend. (Folks might have noticed that Staff seem to be under-represented in posting results.... some of us only just got our tubes... :) ).
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Old April 1, 2009, 11:11 PM
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Default Laptop CPU and GPU Results

Temperature readings:
Ambient: Wall thermometer
CPU: RealTemp 3.00, HWMonitor 1.1.3.0
GPU: as above, FurMark 1.6.5

Test 1 Parameters:

Arctic Silver 5 on CPU and GPU
Load on CPU by Ortho. Small FFTs-CPU stress only. Time: 3600sec. min.
Two CPU core temps shown only when different.
Load on GPU by FurMark. Full screen (17'' except IBM-15.4) 1024x768 MSAA:0X Time: 3600sec. min.

Test 2 Parameters:
IC7 on CPU and GPU - unless noted otherwise.
Load on CPU by Ortho. Small FFTs-CPU stress only. Time: 3600sec. min.
Two CPU core temps shown only when different.
Load on GPU by FurMark. Full screen (17'' except IBM-15.4) 1024x768 MSAA:0X Time: 3600sec. min.


Test 1 AS5


CPU Intel C2D T7600 2.33GHz

Ambient Temp 24C
Idle Temp 28C
Load Temp 79C

GPU Nvidia GeForce Go 7950GTX 575/600

Ambient Temp 24C
Idle Temp 48C
Load Temp 96C




Test 2 IC7

CPU Intel C2D T7600 2.33GHz

Ambient Temp 24C
Idle Temp 26C
Load Temp 74C

GPU Nvidia GeForce Go 7950GTX 575/600

Ambient Temp 24C
Idle Temp 49C
Load Temp 93C




Test 1 AS5

CPU Intel C2D T7200 2.00GHz

Ambient Temp 24C
Idle Temp 25C/28C
Load Temp 71C

GPU Nvidia GeForce Go 7900GTX 500/600

Ambient Temp 24C
Idle Temp 48C
Load Temp 85C




Test 2 IC7

CPU Intel C2D T7200 2.00GHz

Ambient Temp 24C
Idle Temp 22C/25C
Load Temp 65C

GPU Nvidia GeForce Go 7900GTX 500/600

NOTE: Due to warranty, did not disassemble card to apply IC7.
No data from Test 2



Test 1 AS5

CPU Intel C2D T7200 2.00GHZ

Ambient Temp 24C
Idle Temp 27C
Load Temp 71C

GPU Nvidia GeForce Go 7900GS 375/507

Ambient Temp 24C
Idle Temp 46C
Load Temp 66C




Test 2 IC7

CPU Intel C2D T7200 2.00GHz

Ambient Temp 24C
Idle Temp 25C
Load Temp 68C

GPU Nvidia GeForce Go 7900GS 375/507

Ambient Temp 24C
Idle Temp 45C
Load Temp 63C



Test 1 AS5

CPU Intel C2D T7300 2.00GHz

Ambient Temp 24C
Idle Temp 38C
Load Temp 78C

GPU Nvidia Quadro FX 570M 475/702

Ambient Temp 24C
Idle Temp 47C
Load Temp 82C




Test 2 IC7

CPU Intel C2D T7300 2.00GHz

Ambient Temp 24C
Idle Temp 38C
Load Temp 76C

GPU Nvidia Quadro FX 570M 475/702

Ambient Temp 24C
Idle Temp 46C
Load Temp 82C



I ran all tests multiple times, usually because I removed the heatsinks to check the TIM spread. All units where cycled for approx. 24 hours before running tests. The posted results are the second of two identical consecutive tests. The minor changes in some systems I attribute to the clamping design and/or the thermal capacity of the heatsink system.
The three Dells all have dual heat-pipe heatsinks for the GPU, two fans, one for the CPU heatsink and one GPU heatsink pipe, one for the other GPU heatsink pipe.
The IBM has a common GPU/CPU heat-pipe heatsink and one fan.
Any questions, I will try and answer.
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