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[Video Added + Watercooling Results] Replacing the internal IHS TIM of an i7 3770K - Page 11

post #101 of 298

One crappy source isn't evidence of anything. If you look through this thread, there's at least three difference sources confirming massive temperature drops when removing the IHS and replacing the TIM. That first source has terrible testing methodology and they also didn't account for the height difference after removing the IHS. You can clearly see by the way the TIM looks on the cooler that it didn't have enough mounting pressure. You can also clearly see they used too much TIM. And even without that information, it's obvious they made a mistake. Temperature should NOT have gone up by mounting a cooler directly on the CPU rather than on a IHS with an extra layer of TIM, it makes no sense from a scientific viewpoint.

As for the intel quote, of course they're going to claim that, you honestly expect a company to come straight out and say, "we purposely used crappy TIM instead of solder to limit overclocking potential so that our more expensive CPU's look more attractive. This method also let us cut the manufacturing cost down but we didn't reduce the MSRP to compensate, because screw the consumer!" Yeah, no rolleyes.gif
post #102 of 298

I feel as though there was something wrong with the bare die test because it appears the temperatures were exactly the same without the IHS, which doesn't make sense. LESS thermal resistance = MORE heat dissipation which = lower temperatures. It makes no sense from a scientific standpoint that removing thermal resistance doesn't affect heat transfer.

And the one about intel has nothing to do with the TIM, they are just agreeing that smaller surface are for heat dissipation and more densely packed transistors will cause higher operating temperatures.
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post #103 of 298
Thread Starter 
Quote:
Originally Posted by mavere View Post

Air cooler heat transfer: CPU > Metal > Air
Liq cooler heat transfer: CPU > Metal > Liquid > Metal > Air

Not exactly. The metal in the heatsink have to travel a long way till it go the heatsink blades, as water absorbs it and displaces it almost instantly.
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post #104 of 298
I did bare die on E8400 and mobo. You not only have to remove the socket, but you also have to either 1) file/grind down plastic/metal around the socket or 2) use a block the fits down into the socket area. Otherwise, you wont get adequate mounting pressure. At least was case on my mobo.
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post #105 of 298
Quote:
Originally Posted by mavere View Post

That's not how it works.
Air cooler heat transfer: CPU > Metal > Air
Liq cooler heat transfer: CPU > Metal > Liquid > Metal > Air
Assuming all else is equal, the air cooler is better because there are less middlemen for transfer inefficiencies.

It doesn't matter how many 'middlemen' there are. All that matters is how fast you can pull the heat away from the CPU. So both of these example are exactly the same as after the CPU > Metal step nothing else is relevant if both systems have the same rate of heat exchange.
post #106 of 298
Thread Starter 
Quote:
Originally Posted by Bubba Hotepp View Post

So basically, at 4.2GHz you're seeing 5C drop under 100% load? (just asking to clarify) With a soldered chip what would be the expected drop? 10C or more?

Don't look at just the clock. I used 1.27 volts and 4.2 GHz for the OC. The quality of the chip was a total unkown so I just used a voltage and frequency that i knew would work no matter what for a quick test session.
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post #107 of 298
@Cyclops: Do you still plan to try a test without the IHS?
post #108 of 298
Thread Starter 
Quote:
Originally Posted by Hambone07si View Post

Very nice! Looked at your pics in the op and with the modded OC pic vs stock is see a 2c drop on the coolest idle core over the stock pic 23c vs 25c. I know it's hard to control ambient, but having 3c diff in ambient can show 5c diff at loads. Would be nice to see some testing in a controlled room as in a air conditioned office or something. Good effort tho, I'm impressed either way thumb.gif I know dropping my temps in my house from 71f to 69f will shave a few degrees redface.gif
+REP thumb.gif

Huh? The ambient stood pretty much still through the whole test.

25.5C - 25.8C. That was the range. A neglegable 0.3C fluctuation.
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post #109 of 298
Quote:
Originally Posted by samwiches View Post

Did you just skip the OP? He saw -5C just from MX-4 paste.
And follow the link at the beginning of the post---that person saw -20C with Liquid Metal Pro.

'Of course' the temps are going to drop if you use a better quality TIM, but it seems that even the best options aren't dropping the temps enough to make overclocking Ivy Bridge comparable to Sandy Bridge clock speeds. The site that tested the Liquid Metal Pro could only hit 5ghz using 1.55v. Intel probably opted for a cost-savings TIM after their internal testing showed it wasnt a significant factor for higher overclocks.
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post #110 of 298
Quote:
Originally Posted by BinaryDemon View Post

'Of course' the temps are going to drop if you use a better quality TIM, but it seems that even the best options aren't dropping the temps enough to make overclocking Ivy Bridge comparable to Sandy Bridge clock speeds. The site that tested the Liquid Metal Pro could only hit 5ghz using 1.55v. Intel probably opted for a cost-savings TIM after their internal testing showed it wasnt a significant factor for higher overclocks.
5ghz for a IB is like 5400mhz for a SB. SB at 5400 on air is unheard of. So it's still a great overclock.
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