Hi;
Your system is similar to mine in hardware except I have two OCZ Vertex 120GB SSD's and two WD 1TB HD's (no RAID).
Just out of curiosity, do you have your HD's set up with ACHI? This is VERY important for SSD's.
Have you updated all the ASUS drivers from the update site?
http://usa.asus.com/Motherboards/AMD_AM3Plus/Crosshair_V_Formula/#downloadI too had a devil of a time with random hangs ups and boot problems (both with and without OC'ing). Turns out it was a flaky Dominator GT memory module (one of four sticks). I originally had 4 sticks of Dominator (not the GT version) in my CHV and it simply did not like that memory at all.
I finally found it by running the computer with only one memory module at a time (in the far right RED memory slot). If it ran OK I swapped the module for the next one. The third one I tried was bad.
Although you have only 4GB of memory, Windows will still boot (although a little slower) with only 2GB of memory but it will help to diagnose the problem.
The reason I suspect it may be memory is the CHV is VERY touchy about memory.
You might also try boosting the Dram Voltage a little from the default of 1.5 volt. As I have mine OK'ed so am using 1.65 volts for memory stability. The Corsair's like a little higher voltage than the default.
Cheers;
Doc
Retired... and Loving it :cool: