[Mailman]

In short, IRREGARDLESS of the chip used in the card (R423 or R480), flashing BIOS from X800/X800PRO/X850PRO/X800/X800XL will change nothing or may even aggravate the situation (the number of pipelines may be reduced to 4). That's why the version about ATI's present to overclockers that can be easily modified is a lie. The only thing I haven't tried so far is to weld the broken bridge on the R423. But it turns out that the R423 is running out of stock and nearly all X800GT cards will be equipped with the R480, which are locked inside. Alas, there was no miracle. I guess, X800GT Extreme cards may be launched in future (but using two suffixes - down-grading and up-grading - is an absurd) with unlocked R480 chips. This event is not likely as it may cause the market fall.

http://www.digit-life.com/articles2/video/x800-3.html