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Old 03-30-2005, 04:57 PM   #1 (permalink)
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Default Pentium 4 heatsink question

I had to remove a new P4 with heatsink from a bad board , which will be reinstalled later on a new board. When I pulled up the heatsink the CPU was stuck to the heatsink and came up with it. Luckily the pins are not damaged. I carefully pried the CPU off of the heatsink for later reinstall. Should I remove the old compound from the CPU and heatsink, and replace it with new stuff? The P4 was brand new and only ran for 30min or so.

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Old 03-30-2005, 05:12 PM   #2 (permalink)
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yes you should replace it.


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Old 03-30-2005, 07:10 PM   #3 (permalink)
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Always clean the CPU and the heatsink when you seperate them, and then reapply new thermal paste before use (or it will be a very short run...).

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Old 03-30-2005, 07:21 PM   #4 (permalink)
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Oh yeah... Remove all compound with medicinal quality 99.9% isopropyl alcohol. Clean both heatsink and CPU very carefully... Then reapply (i recommend) Artic Silver 5. It's about $10.00 per tube. Each tube is enough to cover about 10 - 15 CPU's. It's the best you can get.

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Old 03-30-2005, 09:03 PM   #5 (permalink)
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Thanks for your replies! Glad I stumbled into this forum. Found a good deal on Arctic at
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Old 03-30-2005, 09:58 PM   #6 (permalink)
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Yes you definitely have to remove the stuff. If you seperate the heatsink and CPU and then just put them back together without reapplying compound then you are letting air in. That's exactly what you don't want.
I found arctic silver 5 cheap at xoxide too. Got it for like $5 extra with my Zalman 7700-Cu, as opposed to like $12 it costs at newegg.

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