Yes, I am using those channel. If I have the RAM in both, it won't get past the LED. if I have in DIMMA2 ONLY, it will get all the way through boot process and I can get to windows. I'll go into the BIOS and check the DOCP profile.
I'll check this out...but I've reset the CMOS with no success for the issue.
EDIT: followed the suggested steps, no luck. I did notice though, when i changed the settings in the BIOS for the ram, and then installed the second stick, it tried to boot twice, failed and sat on the LED again. It didn't do that before. Then I took the stick out and went back in to BIOS...and the settings reverted by to how they were prior....1.45v and 2600MHz.