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#1
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
This may be known issue to some, but here it is any way. Check your
heat sink for flatness across copper mating surface before installing! I went through3 days or frustration trying to figure out my high temperatures problem. I was getting upper 30's idle, and with load going to astronomical 70's on a stock e6400. I can only hope chip wasn't hurt. I finally ran across an article googling where some others had bad intel factory heat sinks. No problem now as I used the heat sink off my other e6300. I am now having to buy an aftermarket heat sink to fix intels F-UP. |
#2
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
In article , It's Not Me
wrote: This may be known issue to some, but here it is any way. Check your heat sink for flatness across copper mating surface before installing! I went through3 days or frustration trying to figure out my high temperatures problem. I was getting upper 30's idle, and with load going to astronomical 70's on a stock e6400. I can only hope chip wasn't hurt. I finally ran across an article googling where some others had bad intel factory heat sinks. No problem now as I used the heat sink off my other e6300. I am now having to buy an aftermarket heat sink to fix intels F-UP. I was reading yesterday, that non-flat heatsinks is also a problem with aftermarket heatsinks. I recommend the "squash test". Apply half-a-rice-grain sized dot of thermal paste to the top of the processor. Do a test install of the heatsink. Check the spreading pattern of the thermal paste, as it is squashed by the assembly. The pattern may help you determine how the two surfaces mate. Up to a point, less thermal paste is better. Thermal paste is intended to fill small gaps, and a tiny film of paste is more effective than an air gap. But large gobs of thermal paste are an insulator, so being overly generous with the paste is also not a good thing. Paul |
#3
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
"It's Not Me" wrote in message ... This may be known issue to some, but here it is any way. Check your heat sink for flatness across copper mating surface before installing! I went through3 days or frustration trying to figure out my high temperatures problem. I was getting upper 30's idle, and with load going to astronomical 70's on a stock e6400. I can only hope chip wasn't hurt. I finally ran across an article googling where some others had bad intel factory heat sinks. No problem now as I used the heat sink off my other e6300. I am now having to buy an aftermarket heat sink to fix intels F-UP. If the PC is still running the CPU can handle it, signs of overheating are when the PC freezes. Short of starting the PC without a heatsink your not likely to damage the proc under your circumstance, even then intel had throttling which would protect the CPU, but I don't know if they still use it. .. Have you tried approaching Intel for a replacement heatsink? Maybe you could just lap it to make it flat? |
#4
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
On Tue, 26 Sep 2006 00:49:56 +0800, "fondue" wrote:
"It's Not Me" wrote in message .. . This may be known issue to some, but here it is any way. Check your heat sink for flatness across copper mating surface before installing! I went through3 days or frustration trying to figure out my high temperatures problem. I was getting upper 30's idle, and with load going to astronomical 70's on a stock e6400. I can only hope chip wasn't hurt. I finally ran across an article googling where some others had bad intel factory heat sinks. No problem now as I used the heat sink off my other e6300. I am now having to buy an aftermarket heat sink to fix intels F-UP. If the PC is still running the CPU can handle it, signs of overheating are when the PC freezes. Short of starting the PC without a heatsink your not likely to damage the proc under your circumstance, even then intel had throttling which would protect the CPU, but I don't know if they still use it. . Have you tried approaching Intel for a replacement heatsink? Maybe you could just lap it to make it flat? Too lazy too go through the hassle of rma with intel, already replaced the heat sink now anyway. All is good now gotta just love these core 2 processors. I just hope somebody else with unknown heat sink problems reads this post and it helps them. It just plain freaked me out as I have gone thought dozens of heat sinks from the days of Intel 486 to present, and this is the first I have ever had with major flatness issues. I guess I should mention that my heat sink was concave to the extreme, I estimate in the range of 0.015 inch gap in middle of heat sink when checked with a straight edge. |
#5
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
Paul wrote:
I was reading yesterday, that non-flat heatsinks is also a problem with aftermarket heatsinks. I recommend the "squash test". Yes, I highly recommend this too. The patterns you will see are interesting. -- Gerry_uk |
#6
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
"Paul" wrote in message ... In article , It's Not Me wrote: This may be known issue to some, but here it is any way. Check your heat sink for flatness across copper mating surface before installing! I went through3 days or frustration trying to figure out my high temperatures problem. I was getting upper 30's idle, and with load going to astronomical 70's on a stock e6400. I can only hope chip wasn't hurt. I finally ran across an article googling where some others had bad intel factory heat sinks. No problem now as I used the heat sink off my other e6300. I am now having to buy an aftermarket heat sink to fix intels F-UP. I was reading yesterday, that non-flat heatsinks is also a problem with aftermarket heatsinks. I recommend the "squash test". Apply half-a-rice-grain sized dot of thermal paste to the top of the processor. Do a test install of the heatsink. Check the spreading pattern of the thermal paste, as it is squashed by the assembly. The pattern may help you determine how the two surfaces mate. Up to a point, less thermal paste is better. Thermal paste is intended to fill small gaps, and a tiny film of paste is more effective than an air gap. But large gobs of thermal paste are an insulator, so being overly generous with the paste is also not a good thing. Paul While we're on the topic of stock heatsinks, which gets hotter during normal use, the Northbridge or Southbridge? Then, considering the stock heatsinks on the P5WDH, would it be worthwhile to replace the NB sink with a good aftermarket HS like Zalman's NB HS? It got very good reviews. Ron |
#7
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
Ron Krebs wrote: While we're on the topic of stock heatsinks, which gets hotter during normal use, the Northbridge or Southbridge? Then, considering the stock heatsinks on the P5WDH, would it be worthwhile to replace the NB sink with a good aftermarket HS like Zalman's NB HS? It got very good reviews. Ron For Intel chipsets, you can look up power numbers in some of Intel's accompanying documentation. For other companies, you may have to rely on comments from other users, as to which runs hotter. If I had to guess and a completely unknown motherboard, I'd say the Northbridge stands a chance of running hotter. Note that some unified chipsets (just one chip does both the Northbridge and Southbridge function) run very hot. They could be dissipating on the order of 20W. Of course, getting actual datasheet numbers for these is impossible. In cases like that, you may want to include a fan on the replacement heatsink. The way you work this out, is use the thermal resistance of the heatsink you are buying, and use the power rating of the chip, to work out the temperature rise above the ambient inside the computer case. This is some sample data from the Aavid catalog for 3 heatsinks: Length Width Height still with mm mm mm air fan 200LFM 35x35 374624B60024 35.00 35.00 10.00 23.40 7.55 Black anodize 35x35 374724B60024 35.00 35.00 18.00 15.30 5.15 Black anodize 35x35 374824B60024 35.00 35.00 25.00 12.00 4.27 Black anodize A 35x35x25 heatsink is a bit smaller than a Zalman. The still air theta is 12 degrees C per watt. When 200 linear feet per minute is blowing over the heatsink, the performance improves to 4.27 degrees C per watt. Say the chip you are cooling, dissipates 10W. Say the room temperature is 25C and the computer case air temperature is 35C. If you had the above sample heatsink with a fan in place, the chip temp becomes 35C + (10W * 4.27C/W) or 77.7C. The Northbridge on my computer is rated for 99C max, so that would at least avoid going over the max temperature. But you can see, if you removed the fan, it becomes 35C + (10W * 12C/W) or 155C. That would cause the computer to crash, at the very least. I included that example, not because I am recommending you attempt to gather enough info to do that kind of arithmetic, but to at least demonstrate that removing the fan from a heatsink is not always a wise idea. If you want a good chipset cooler, this one is rated at 1.25C/W, which is exceptionally good. The problem with a unit like this, is it may bump into your video card. Before doing any mods, think carefully in three dimensions, as to whether your mod will bump into something inside the computer. Some of these devices also mount rotated in the x-y plane, due to the min/max locations of the screw holes on the mounting arms, so don't assume that they will align square with the top of the chip. http://www.swiftnets.com/products/mcx159-CU.asp Of course, don't let me spoil your fun :-) Paul |
#8
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
"It's Not Me" wrote in message ... snip I guess I should mention that my heat sink was concave to the extreme, I estimate in the range of 0.015 inch gap in middle of heat sink when checked with a straight edge. Hell that is a lot, if yours is typical there has to be a serious design problem here!... |
#9
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
I don't think it's "typical", but there may have been a run of bad
heatsinks ... it may be typical of the bad ones. Jerry wrote: "It's Not Me" wrote in message ... snip I guess I should mention that my heat sink was concave to the extreme, I estimate in the range of 0.015 inch gap in middle of heat sink when checked with a straight edge. Hell that is a lot, if yours is typical there has to be a serious design problem here!... |
#10
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!!WARNING !! Intel Core 2 Duo Stock Heatsinks !! WARNING!!
Only comment I can make on this thread is that the one that came with
my E6700 had the factory thermal paste inconsistently applied, leaving open voids. I stripped it and applied Artic Siler 5. The heatsink base was, however, dead flat. Maelstrom On Tue, 26 Sep 2006 10:38:31 -0400, Barry Watzman wrote: I don't think it's "typical", but there may have been a run of bad heatsinks ... it may be typical of the bad ones. Jerry wrote: "It's Not Me" wrote in message ... snip I guess I should mention that my heat sink was concave to the extreme, I estimate in the range of 0.015 inch gap in middle of heat sink when checked with a straight edge. Hell that is a lot, if yours is typical there has to be a serious design problem here!... |
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