WinLinMac, I also wasn't overclocking. Escpecially 'cause i have a 220 Euro CPU in my system. But I now tested some things, especially temperature and stability and it seems to work fine. And you'll find interesting things checking the BIOS.
So, here are my next overclocking results. This time I experimented with the CPU voltage settings. As I was using my Athlon XP I was using a very low voltage, and this was good. One day suddenly the fan wasn't working - i didn't noticed it - as parts on the Windows screen went black. I shutted down the thing, looked in the BIOS - the CPU was at 92°/197°F! You have cooked an egg on this thing. If I had used the normal voltage, the cpu would be burnt down, but it still works fine. But now to the actual cpus. Although my CPU temperatures were very good, I reduced the voltage. On the Athlon 64 4000+ it looks like this:
Athlon 64 4000+ 2.64 GHz: avg. Temp 34°C/93°F, with CPU core voltage 1.35V temp is 27°/80° in normal use.
On my Opteron I experiemted a bit more. I experimented with CPU mutlitplier and bus frequency and got it to 3.03 GHz stable, with 3.06 GHz it crashes during boot. Actually I use it at 3 GHz with a core voltage of 1.30V.
Opteron 185 2x3.00 GHz: CPU 111.70, overall 179.22, CPU voltage 1.30V, avg. temp in use 32°C/89°F
Great results: faster cpu, lower temperature. Detailed results are here.
2 Opteron systems: OSx86 10.5.8, Andy's 9.8.0 kernel, Asus A8N-SLI Premium, Opteron 185 o'clocked @ 2 x 2,95 GHz (2nd system 2.6 GHz), ATI Radeon HD2600XT 256MB Dual-Monitor 2x HP L2035, 4 GB RAM, Griffin FireWave as main audio device, Marvell + nForce LAN, Asus U3S6 USB3/SATA6 card, 5,5 TB harddisk, Firewire 800 card, Apple Remote + eHome IR receiver, 2x Wacom serial graphics tablet, Canon Pixma iP4700, Logitech Internet Navigator wireless keyboard/mouse combination.
My Audio stuff: M-Audio Transit USB (default audio), M-Audio ProFire 610, M-Audio ProFire Lightbridge (34 channels) using Creamware A16 ADAT converter • MIDI: M-Audio Midiman 4x MIDI interface • Behringer Audio Mixers: Xenyx 1002, Xenyx 1002FX, Xenyx 1202FX, Eurorack UB1002FX, Eurorack MX1804FX, Eurorack MX262A • FX devices: Lexicon MPX100 DSP, Behringer DSP-1000 Virtualizer, Behringer MiniFEX 800 DSP, Behringer Multicom Pro MDX4400 compressor • RETRO: MSSIAH midi/sequencer/synthesizer cardridge for the C64 (Dual-SID), Steinberg M.S.I. MIDI Interface for C64
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