Athlon Voltages... ..Greebe?

[Hamlet]

What are the safe limits for athlons core voltage? I've heard the max. limit for anyone even remotely concerned about his cpu's well beeing is 1.85V. True?

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Athlon 500/MSI 6167/128mb/7200rpm/SB128/G400Max/Win98/RH6.0

[RoGuE]

Should be OK up to 1.9v, but I wouldn't go any higher.

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System 1:
Microstar K7Pro (MS-6195) Motherboard, AMD Athlon 550 @ 900MHz, 256MB PC-100 CAS2 SDRAM, Matrox Millennium G400 DualHead Max, Matrox Rainbow Runner G-Series, Creative Soundblaster Live! Player 1024, Promise FastTak66 RAID Controller, 2 x 13.5GB IBM ATA/66 HDD's, Panasonic SR-8584 6x DVD-ROM, Yamaha CRW8424 IDE CDR/RW, Panasonic SuperDisk LS-120, Netgear FA310TX 100m/bit PCI NIC.

System 2:
Microstar MS-6167 Motherboard, AMD Athlon 500 @ 750MHz, 128MB PC-133 SDRAM, Matrox Millennium G400 DualHead, Creative Soundblaster Live! Value, 22GB IBM ATA/66 HDD, Hitachi GD-2500 4x DVD-ROM, Linksys LNE100TX 100m/bit PCI NIC.