Originally Posted by 2010rig
What kind of voodoo driver is the 290 using?
290X will have to be retested...
This driver voodoo:
Originally Posted by Anand
On a final note on the matter, how AMD is distributing the revised fan speed specification is also a little different than anything we’ve seen them do before. With it being too late to reprogram the first wave of cards – remember, at this point they’re already boxed up for retailers – AMD has programmed the change into their drivers instead. So for the 290 with Catalyst 13.11 Beta v8 and later, AMD will override the BIOS default of 40% and put it at 47%, making this the rumored "AMD performance driver" that some have been expecing to be released alongside the 290. Meanwhile the next wave of cards will presumably come pre-programmed with the new 47% specification.
The new driver is supposed to keep the card at its max boost. Making it effectively as fast as a 290X in quiet mode even though the clock for clock difference is around 10%.