Updated DSDT.
Had issues with external 3.5" USB drives being identified as Internal Drives.
Changed
1) EHC1 / EHC2 --> EH01 / EH02 per RehabMan
2) Under _DSM for EH01/EH02/XHC, last line before DTGP modified to
"built-in",
Buffer (One)
{
0x01
USB drives now identified as External..woot!
Speedstepping 3570k SSDT also attached if anyone is interested.