Hi,
I've had my phase 5 Blizzard 1260 running at 66MHz for oh, must be 7 or 8 years now. Still no problems, and although my machine isn't very stable to begin with, extensive testing has shown that overclocking doesn't make it any more unstable. Also using the SCSI kit with it, but haven't had the opportunity (or motivation) to see if its speed was improved in any way by the new crystal. I did put a socket on the board at the time though so that I could swap back should any problems start to appear,but it runs cool in my tower anyway with a small 486 fan on it... I suppose 486 fans are getting hard to come by at this stage, so a chipset fan would do the trick instead.
