I recall reading somewhere... fairly recently even, that there was a certain CPU upgrade available for the 9xxx/8xxx/7xxx series PowerMac's that had an apparant link to failures of the onboard  SCSI controllers on 9600 logic boards when installed, inasmuch as machines fitted with said specific upgrade had a noticable failure rate as compared to other vendors or stock CPU's.

Can anybody verify this, and if so clarify which specific CPU uprgrade it concerned? Something makes Sonnet stick out as the brand in question but I can't be certain or remember much beyond that.

I have a Sonnet Crescendo G3/400 upgrade that came with my 9600 but given how scarce these machines and parts for them are in Australia these days, I don't want to put it in if there is a chance that it will fry things.