Today AMD is releasing two new processors for the main-stream market. First up is a new top-end quad-core, the 3.6 GHz Phenom II X4 975 Black Edition. The X4 975 BE is simply a 100 MHz speed bump over the already familiar X4 970 BE with no other design changes. The second new processor is a budget quad-core, the 3.2 GHz Phenom II X4 840. Previously the 8xx series chips have had 4MB of L3 cache instead of the traditional 6MB, but this new X4 840 is a little different.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips