790fxta-ud5 BIOS upgrade - ext USB HD's dropping out

[ranger1]

Since upgrading my bios to F3f and also upgrading the NEC USB 3.0 driver, my external drives keep dropping off. I have to reboot to get them back on. Turning them off and on, windows does not detect them.

These drives worked fine on the F2 bios. Has anyone seen this problem before?

Enclosures are Vantec Nexstar 3mx with 2x500gb WD green drives in JBOD mode.

I cant roll back as i have the new 1090t in place.

MOBO: MA790FXTA-UD5 CPU: PHENOM X6 1090t GPU: 2 x XFX 5850 XF CPU Cooler: TRUE PUSH/PULL_HD: SAMSUNG 1TB F3_CASE: SILVERSTONE-FT01 MEMORY: 8 GB G-SKILL F3-1600 OS: WIN 7 x64

[absic]

Hi,

Have you checked the power options from within Windows?

Double check that you haven't got USB selective suspend settings enabled as this will automatically turn-off external devices if they are not being regularly accessed.

ATB

[ranger1]

Thanks for the reply yes I have I have deactivated all powesaving options. But both units continue to go offline.