Hey guys,
I am trying to get my new UD7 up and running and struggling to get it working with all 6GB of my RAM.
I have an i7 920 D0, and a set of G.Skill Trident DDR3 PC3-16000C9 2000MHz 6GB kit. (F3-16000CL9T-6GBTD)
Sometimes -very rarely - the machine will POST showing 6GB at the BIOS, and Windows 7 x64 will show all 6GB available and usable.
But most of the time only 4GB will POST at the BIOS, and Windows will show 6GB with only 4GB usable.
I'm not even overclocking yet, I'm just trying to get the RAM seen at 1066 with 8-8-8 timings, and the CPU is just at the stock 2.66GHz.
The RAM is seated in the three white slots - i.e. slots 1, 3 and 5 as per the manual for triple-channel mode.
I've seen this is a fairly common problem but can't seem to get a sure solution. I've upped my QPI voltage to 1.34v, and DRAM voltage to 1.6 - even tried 1.620, and this doesn't seem to help.
I've tried reseating the CPU and the RAM numerous times to no avail. It seems completely random whether the last 2GB is POSTed or not.
Is there anything obvious I should try, and if not, what should I RMA? The board, CPU, RAM, or even all three?
One thing I did wonder is whether my Zalman 600W PSU is enough to run it. It ran my previous system very well (a QX6800 on a Striker Extreme) and if I leave all my disks and cards detached it doesn't seem to make a difference.
Any help much appreciated - I am obviously very new to the X58 and i7.
