> > I just looking for real info about overclocked 7457 VCore. Information
> > if Sonnet had 7447 or 7457 is redundant for this question.

> Not quite, I think. If Sonnet really used 7457 CPUs overclocked up to 1.8 GHz, the info
> you're seeking may be derivable somehow from (preferably non-destructively) examining such
> Sonnet card. If they didn't, they are not.

I never thought Kronos had a Sonnet - they are rare. At first I supposed to find somebody who made CPU swap and overclocked 7457 to 1.8 GHz. I found such guy, but he don't know exactly the VCore, because after several month with 1.8 GHz he lower frequency because of high fan noise ( i.e. not ideal cooling )
If somebody has Sonnet, it will be fine, but probably he don't want to remove cooler and investigate settings.

> I'm not sure what "default frequency" means here, but yes, in terms of maximum rated
> frequency, during the first year, the 7457 was 1267 MHz vs. 1300 MHz of 7447. After that,
> the 7447 got downrated to 1267 MHz as well. This happened around 03/2004.

and after that 7447B/C rated frequency rises upto 1700 MHz, and frequency of 7457 stayed on 1267 MHz all the time.