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  1. #1
    Member omaticrail's Avatar
    Join Date
    Feb 2002
    Location
    Seattle area
    Posts
    296

    MC462a pitted after 2 years???????

    I'm not alarmed, because I can practice lapping on this thing before I get my waterblock. However, I thought this to be particularly odd. Take a look at this pic (0.5MB), (linked to spare the modem users). See the pitting? That coincides precisely with where the athlon contacted the base. It hasn't been remounted in 2 years, and the somewhat hardened grease (cleaned off) was the original that came from Swiftech. What do you suppose caused this?

    On a related note, I expected to see no visible amount of grease directly over the processor, but there was; at least 2 sheets of paper in thickness. Is this a sign that my pads are pushing back harder than the 462's springs? Do I need to trim off the pads to ensure a proper seat? I never had a complaint about temps, but then I never was able to overclock due to poor choice of memory. I really like having the pads there, cuz it makes mounting this monster HSF a lot easier.
    -------------------------- System built in 2005 --------------------------
    CPU: Venice 3200 @ 2.55Ghz mobo: ASRock 939Dual-SATAII RAM: 1GB Corsair XMS PC3200
    WB: Storm G4 Rad: BIP3 Fans: 3x Panaflo M1A GPU WB: Maze4 Acetal
    Pump: DDC

  2. #2
    Senior Member Celemine1Gig's Avatar
    Join Date
    Dec 2000
    Location
    Germany->Bavaria-> Augsburg
    Posts
    746
    Normally that happens if there's some dirt in the thermal compound when mounting the heatsink. Through the vibrations of the heatsink over time, the dirt begin to dig deeper into the surface --> pits!
    That would also explain the thick layer of compound, because the dirt hinders the compound from spreading evenly.
    Nothing to be seen here. Just move along people. ;-)

  3. #3
    Member Staz's Avatar
    Join Date
    Mar 2001
    Location
    Lafayette, La.
    Posts
    396
    I recently removed my MC462a from my CPU after it had been there for about 2 1/2 year. I had no pitting at all. As a matter of fact I had a mirror image of everything that was printed on the CPU core on the base of my cooler. I was running a 1GHz TBird @ 1.46GHz the whole time. But the base was smooth.
    How come whenever I have a 50/50 chance I'm wrong 80% of the time?

  4. #4
    Disabled
    Join Date
    Nov 2003
    Posts
    41
    In all my grease testing I've found at least 1 grease with large abrasive fillers, causes pitting on soft copper.

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