64-bit OS yet only 2GB usable?
More info here:
http://forums.overclockers.co.uk/showthread.php?t=18137361
But as I now think it's probably not just Windows messing around I'm going to try here instead!
I have two pairs of RAM, both from OCZ, but of different speeds. They both worked fine on my old mobo until I killed it with some incredibly unlucky overclocking (Q6600 to 2.8GHz if you'll believe it... so unlucky!). However, I'm having some curious problems on my new motherboard (EP41T-UD3L).
With the 1066MHz pair in slot 1 and 3, and the 1600MHz pair in slot 2 and 4, the machine recognises all 4GB but says (in Windows) only 2GB usable with 2GB reserved for hardware.
With the pairs the other way around it POSTs, and then crashes a split second before the Windows start up.
With just the 1600MHz in, in slot 1 (or 1 and 3) it POSTs fine, shows some weird artefacts in the top left hand corner of the screen before start up for about 20 seconds, then starts up fine. Then in Windows it recognises 2GB of the RAM, and all of it is usable.
With just the 1066MHz pair in it boots and starts up fine.
I also noticed that my motherboard has some stickers on saying "DDR3 1333MHZ!!!" yet no mention of acceptable memory speeds in the manual. What solutions can you suggest? Thank you in advance, for any advice you may proffer.