ASUS FX990 Sabretooth question

[jpk]

Anyone know what is the difference between the first issue FX990 and the second? I have the first version. Any major difference? Tnx.

 

[Leyawiin]

Revised digital power control for both the CPU and VRM (previous was just for VRM I believe), Windows 8 ready. The few reviews I've read about it do show it uses less power than the Rev 1.