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Removing the IHS from the Northwood-D Removing the IHS from the Northwood-D
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Removing the IHS from the Northwood-D
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Old 9th September 2003, 22:32   #11
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right, but his is a copper one, I don't think this is the case on 533fsb cpu's. However, it is worth the shot.
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Old 10th September 2003, 07:40   #12
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ok
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Old 10th September 2003, 22:18   #13
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Um... all Intel heat spreaders are copper just like how they all had hyperthreading capabilities built in but was hardware burnt and disabled permanantly.

My question is why would this decrease the processors life by 50-75% like he said?
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Old 10th September 2003, 23:37   #14
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Thank you. I was in error printing that. I didn't mean to imply removing the IHS in itself would have some other ramification other then the chip being exposed to the elements. A greater chance the core would be cracked by a heavy heatsink or mishandling. I know of no reason why simply removing the IHS would have any detrimental, electrical, or other negative effect. In fact if the chip is handled carefully then common sense says that any few centigrade reduction in overall operating temps would actually lenghten the life of the chip, and by a significant amount.

In so far as the copper question. I think their (IHS's) all copper underneath. It's misleading but since copper is third best conductor of heat, I'm sure Intel has been using copper for some time. There's really no other metal; except aluminum, due to cost.

Here's an example;
Thermal Conductivity is the amount of heat a particular substance can carry through it in unit time. Usually expressed in W/[mK], the units represent how many Watts of heat can be conducted through a one meter thickness of said material with a one degree Kelvin temperature difference between the two ends.

Diamond = 2000 - 4000
Silver = 417.3
Copper = 393.7
Gold = 291.3
Aluminum = 216.5
Steel/Iron = 66.9
Lead = 34.3
Ice (H20 @ -0.5C) = 1.6
Carbon = 1.6
Glass = 0.8
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Old 10th September 2003, 23:43   #15
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Thanks for the clarification !
the howto has been updated, http://www.madshrimps.be/?action=get...102&howtoID=39
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Old 11th September 2003, 00:08   #16
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Quote:
Originally posted by some1x
I removed the IHS accidentally :-0....The biggest concern I have is that the IHS added thickness to the CPU; and the heatsinks are designed with that thickness in mind. So now, the heatsink applies much less pressure to the core...
I'm glad you brought this up. I had the same question even after lapping the CPU. What I did was to foolishly lap down the standoffs, and the screw bottoms (they tap-out in the standoffs) to try and compensate for the height reduction. All I really did was ruin my SLK-900-U. Luckily I had the SLk-947-U in for an article, and was saved. I'm donating the SLK900U to a freind in canda, who's going to try mount a fan on it's side pointing down? I still haven't figured out what he's up to. It was also brought to my attention, simply placing a few washers under the springs would have the same effect. I haven't figured that one out yet either but read on.

Here's the pretty part. I then realized the reduced height was just enough to reduce the pressure, thereby avoiding "my" biggest fear, cracking the core. My temps have been at 29C for the last four days running my 2.4C@3.0GHz on 250FSb 1:1, at 1.550Vcore. Their currently at 28C as evening falls. I beleive the reduced height is the perfect ad hoc blessing which solves the problem of possibly damaging the core. My answer; do nothing. Mount your HS carefully, and IF the temps seem high, then you can lap the bottom of the screws, and the standoffs they sit in, because they tap-out in the bottom of the standoffs, so I lapped both.
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Old 11th September 2003, 07:25   #17
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I'm surprised that you think a "4-6c" drop in temp is insignifigant -- article is worded that way... Everyone's switched to more expensive PCM+ for a 2c difference on the average....another 4+c difference for a little work is big dividends in that context.

Exposed core protection; anyone check the thickness of a shim for the Radeon cores? I don't have a good pair of digital micrometers, but the one from my 9800Pro looks awefully close...
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Old 11th September 2003, 13:20   #18
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I guess your right about that, 5C-6C is very significant. I don't know why I was minimizing that? And as a matter of fact, if done well, temps will be even lower. Based upon my tests since removing the IHS, temps have dropped as much as 8C! I'm currently using AS3 until I determine what's happining with Nanotherm PCM+, (this is what I'm refferring to; http://www.modsynergy.com/Nanothermtemp.htm) I didn't want to use PCM+ just yet. But if PCM+ works as well as it has, then my current temp of 28.50C will drop further to 23C!!!

Here's a shot of my current temps at default speeds (yet 1.50Vcore).
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Old 12th September 2003, 12:15   #19
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i did it too.
here my results.

p 2.4B 533fsb

befor:
18*156 @ 1.675V (prime95 aproved ! 12houres)
idle around 53C stressed till 72C

after:
18*160 @ 1650V (prime95 aproved ! 12houres ,too)
idle 45C strressed 62C

maybe because the .025V voltagedrop but i dont need more vcore now!!!

i did the method with the cutterblade 10min of work.

but i has to remove the mainboard because i have a alphacooler.
after removing ths IHS i have to remove the plastic disks to get the cooler contact the cpu.

have fun
inteks
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Old 12th September 2003, 12:20   #20
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PS:
maybe i can go a bit higher then 160 now but i like flat numers !!!
) 2.88 GHz flat is ok!!!

here is a pic:



cya
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