6gb of ram installed, 4gb of ram usable

[GrimLock380]

Hi,

I recently built a computer, with 6gb of ddr3 corsair dominator ram, however (under system information) it shows that only 4gb of the 6gb of ram is usable.

After going through other forums, I eventually came to the conclusion that i need to enable memory remapping. I couldn't find anything to do with that in the BIOS. Does anyone know what it's under? Or if this isnt the solution, then what is?

Motherboard - P55A-UD4

OS: Windows 7 Pro. 64bit

[oggmonster]

I've heard of people having to enable XMP somewhere in the memory settings, don't know exactly where as I do not own an i5/i7 board. Also make sure you're using latest BIOS

[Pottypete]

Hi,
Have you downloaded the manual, it should show bios settings in there?
Cheers

[GrimLock380]

It's ok, i've fixed it   thanks for the help

[Pottypete]

Hi,
Happy you sorted it,
Cheers

[oggmonster]

It's ok, i've fixed it  thanks for the help

What was the fix out of interest?

[palavering]

I have the same problem.  I'm glad you fixed yours; can you tell us what you did to fix it?

[Beekeeper]

it seems like kind of bug in this OS, just found this solution on unofficial win 7 forum:

1) run
2) type "msconfig"
3) go under the "boot" tab
4) click "advanced options" button
5) UNCHECK "Maximum memory"
6) Reboot

try and let us know

[palavering]

It wasn't checked to begin with.  But thanks.  Here's what I've discovered:  DDR3-2 and DDR3-1 aren't reading the RAM I place in them.  These are the first two slots from the left facing the board.  However, DDR3-4 and DDR3-3 are working fine.  I am using 1 dual-channel stick and 1 ddr3 stick in the first two slots and the same in the last two slots.  I have tested both the dual channel and the sd Ram and all work, but not in the first two slots that I mentioned.  Do I have a defective board, or can these first two slots be turned on?  And, if YES, how do I do it?
Thank you for your assistance and your time.  I appreciate it very much.
Bill

[runn3R]

Hi palavering

We will discuss it here:
http://forum.giga-byte.co.uk/index.php/topic,1258.0.html

as you did too many duplicated posts about the same problem

[hyrola]

Dont you just love people who come on just to post there issue, find a solution to a problem that many others are having and don't come back to offer the advise in how they resolved it!?

I've only just registered here after buying a x58a ud7 board, but if i find a resolve to a problem i will come back on and update!

Glad you got your issue sorted Grimlock... if you come back on here, please share it with the rest of us.

[runn3R]

Hi hyrola

Fully agree!

I've just sent PM to Grimlock380 about it. Let's hope he'll reply soon.