"UT2004 and Half Life 2 were absent from our testing, simply because we didn’t have the time to get them installed, but the rest of the scores here should be indicative of the full impact of the BIOS update. In the media encoding tests we saw absolutely no performance impact other than a 1 second reduction in iTunes encoding time. F.E.AR. at 1024 x 768 saw a reasonable gain of 4%. Quake 4 remained virtually unchanged."
-Anandtech tests how much a BIOS effects performace; hardly at all.
They confirmed Cool'n'Quiet was off.
"The new BIOS also correctly identified the Athlon 64 FX-60 processor, although as you can see from the results above, the proper detection of the CPU didn’t translate into greater performance."
"The performance advantage of Conroe makes a lot more sense now, at 20% instead of 41%. With performance in Quake 4, UT2004 and HL2 in the 20 - 30% faster range on Conroe, the F.E.A.R. results now make a lot more sense."
So, the tests were re-run and Intel still came out on top. Maybe not 40%, but it's still a massive lead..and even what they claimed!