A kind soul (I won't mention his name unless he wants to chime in) is sending me a CPU daughter card from a MDD. It is a DP1.25ghz. I plan on putting it in my Digital Audio powermac. The powermac is a single 733mhz, but I also have the DP533mhz with the dead PSU. I checked out google images of the DP1.25 and the DP533. The CPUs appear to be in the same position so I am assuming the HSF from the DP533 will work. I don't have any arctic silver, but I will be applying new thermal compound. Do I need to worry about anything else in regards to the CPU? My planned upgrade is as follows: Digital Audio logic board DP1.25ghz (from an MDD) 1.5gb pc133 (512 x 3) 2x 80gb seagate 7200rpm 8mb cache (I have to mount them beside each other since I don't have the vertical drive mount to use the original IDE cable) Radeon 9000 pro 128mb Pioneer DVD-RW 250mb zip drive (I only have 100mb zip disks though) Golden N airlink 101 wireless N Generic PCI USB 2.0 card.