The regular PEP66 has a 60x25mm fan and does not fit on most Socket A boards without modifications. They make a version for Socket a that uses a low profile fan (I think a 60x10mm fan) that puts out a lot less air flow and hurt the performance a lot. With the dsame fan though the pep66 will cool slightly better.
------------------
The COMPUTER is your FRIEND!
Happiness is manditory.
AMD Phenom II x4 945 3Ghz | ASUS M4A77TD | 2X WD 1TB SATA 2 hard drive | 2x2GB Corsair XMS3 | nVidia GeForce 8800 GTS | ATI TV Wonder Theater Pro 550 | Antec P-160 case | Antec 650w Earth Watts | LG Blu-ray Super Drive | LG DVD RW | Windows 7 Pro
Bookmarks