CPU Guide
AMD Athlon II X4 645
Bumping up 100MHz from the older AMD Athlon II X4 640, the 645 is now at 3.1GHz and provides an affordable option for those looking to get a quad-core processor.
HWZ's Overall Rating: 7.0
THE GOOD
Inexpensive quad-core processor
THE BAD
Single/dual-threaded performance lacks bite