At 1.625V, 16x133 2128MHz (2600+) is stable.
At 1.650V, 17x133 2261MHz (2800+ ?) is stable
At 1.675V, 23x100 2300MHz (????+) is stable
Looking through the CPU database, this seems average. I will get a better heatsink soon, so hopefully I can improve on this.
This is using the stock AMD cooler, modified with a 80mm case fan,
on an MSI K7T266 Pro2 (6380v2.0) modified to accept Thoroughbreds.
These were all done using really weird bios settings, 8x in bios equated 16x real, 9x in bios equated 17x in real, 10x in bios equated 23x in real!
I only stumbled on these multiplyer settings by playing around at 100FSB, then noticing that the multiplyer was not locked after all. But it seems that I can't get anything lower than the stock 15x.
In the beginning I thought this cpu was a real dud, cos I only got up to 136FSB stable! (15x136 2040Mhz, a lousy 2%!)
But then I thought that it might have been due to my motherboard: KT266A based MSI K7T266 Pro2, which officially does not support Thoroughbreds.
I only just modded the motherboard yesterday (removing a capacitor the size of 1/4 rice grain), so that it works with Thoroughbreds, so I figured the motherboard might be the culprit.
Good thing I found how to change the multiplier.