that is kind of right. most modern cpu's are set by onboard binary traces, this is done on all P 4's and athlon XP/64 cpu's This setting is laser cut by the factory, that way each cpu can be used on the same organic chip interface. All the cpu manufactures do is place the die on the organic pin grid array (PGA) and dial it in to the cpu installed. Most motherboards read this binary selection and set the CPU voltage to match. The problem is if the motherboard can adjust the voltage low enough to not burn up the cpu. I would bet the default (800mhz) setting of the new turion will be about .5v and scale up to about 1v at full power. The 3400 in the 6811 has a default (800mhz) voltage of .95v and scales up to 1.45v. The motherboard on our systems may not go low enough to properly set the voltage for startup. That was also a problem for the first socket 462 chips, they ran at a default voltage of 1.85v, you can now get a socket 462cpu that is only 1.35v, try putting one of those in a mb that will not go that low and see what happens. It will "fit" but it will die in no time. I hope we can just drop one in, and power it up, but I don't think it will happen. One last thing to concider, each CPU also has a binary table for the CPU, with the athloh xp that table was 4 bits, that set the multiplier, many early cpu's could not go over a multiplier of 12 because of that, so amd added a 5 bit to support more multipliers. When a motherboard encountered a 5th bit ie would fail and not post, nothing could help that. This same bit code tells the bios what cpu is installed, that way the bios can tell the user and windows what cpu is installed. If it does work, we will have to have a new BIOS that would id the chip based on the code.