first off, what are your system specs? also what OCing program are you using?
Ok good question, my specs:
2 x Quad Xeon X5355's @3.2ghz - 1.313v FSB@1600mhz
12GB DDR2 FB-DIMM Kingston HyperX @ 800Mhz
Sapphire 5870 1GB + XFX 5970 2GB Crossfirex 850/1200
SATA III 6GB/s + USB 3.0 Asus U3S6
Bluetooth 2.1 + 802.11n
2 x 64GB OCZ Vertex 2E SSD's RAID 0
60GB Crucial C300 6GB/s
1.5TB WD Green
1.0TB WD Green
Liteon Blu-Ray R/W x12
1000w PSU
5.25" 450 PSU
Running Windows 7 Pro x64
Mac OS X 10.6.4
Secondly the software I've been using thus far is stuff like Systool, and anything else that's free I can get my hands on, but Systool seems to work best/ easiest for me