Successfully updated my motherboard bios.  Did all those tweaks at bios and here is my results.  Seems like CPU can reach 4.5GHz.  But when idle it drops back to 1.6GHz.  I don't have any benchmark tools, only have the window experience index.  Previously my processor score was 7.5, now after OC is 7.7.

I did the change the ram speed in bios to 1600 too.  But in CPU-Z i don't see it reporting i'm having 1600 MHz ram.  However, the windows experience index did increase from 7.7 to 7.8 for the ram.  So my memory is it running at DDR3 1600MHz now or still DDR3 1333?

Lastly was graphics.  I stock was 725/1450/1800 (core/shader/memory).  I increased them to 825/1650/2100.  Tried SF4 game, no changes.  I can see at top left corner showing fps 60 all the time, i think that is the max FPS for SF4.  Run crysis warhead, dunno how to check for score.... but it can run well.  Windows experience index for graphics and gaming graphics increased from 7.5 to 7.6.

When I try to update to latest nvidia drivers, it seem to have some fail message.  I attach the picture below.  Anyone can explain to me why this happens?

That is it.  I think I will leave it at this overclock settings.  What do you guys say?

I see.  So I did manage to overclock my ram to 1600.  And it was easy.  At bios I just choose the option 1600.  I think bios i can choose all the way to 2133.  But I'm happy with 1600.  No need to spend extra money for 1600 ram kits, haha.  Thanks for pointing that out.  No wonder my windows experience index shows the memory improve from 7.7 to 7.8, but I cannot verify if I did oc the ram from DDR3 1333 to DDR3 1600.

Only problem with Sata 3 port
Sata 6 port work fine

I saw somewhere extreme-z is set to be launched during Computex 2011 btween 30/5 to 5/6.
Let's fingers crossed.