Memory Size Reporting Incorrectly?

[Dantian]

Hi Folks

I've just built a nice new i7 rig and I've got a wierd problem. When I boot up the start up screen only shows 4gb of memory when I have 6gb installed, its also the same if I run memtest86+ and in windows7 task manager. If I run any diagnostic tools from windows I can see all three sticks.

My system specs are:

i7 920 D0
Gigabyte GA-EX58
6gb Corsair XMS3 1600C7 (TR3X6G1600C7)

The memory completes memtest with no errors.

Any help would be much appreciated

Dan

 

[Dantian]

Yeah its 64bit, i'll give that a quick try now and post back.

 

[Dantian]

Well I tried all the combinations and have it nailed down now. Looks like one of the sticks is dead.

Thanks for your help.
Dan