2 SSD / 2 OS / conflict on mobo / 1 boots
Intel 120 GB with Win 7 on it , Adata SX 900 120 GB with Win 8,1 on it. Mobo - ASUS P9X79 Pro
Loaded separately, updated with programs
Windows 7 drive will ( with both SSD's attached) do this---
do a chk disc, next boot, will load but only display a line of pixels at top of screen, will, after a few minutes, go back to ASUS splash screen and then boot. After this the machine will boot only to 7 tho the boot order remains for 8.1 at first priority. Have to override before Win 8.1 will begin to boot first again. Back to choose Win 7 and the same thing happens.
Have already ---- tried separately, turned off Marvell caching, switched SATA ports, mobo has new bios chip
Ideas, out there??