BIOS does detect only half of my RAM memory

coddyfile

Honorable
Jan 23, 2014
9
0
10,510
Hello everyone!

I'm having a problem: my BIOS does not detect my memory properly. The PC was working fine before my travel, but when I came back, I realized this problem. I have 2 x 2048 MB of RAM, but the BIOS only reconize 2 GB of memory. I did test 4 x 2048 (the same brand, memory size and frequency) and now the problem becomes 4 Gbs reconized memory (always the half of the memory installed). I did clean the memory sticks, tried my RAM on another PC (and it worked nice), had reseated the CPU 3 times, and nothings seems to work. On the startup the bios shows on the memory test 2056192 K, Windows 7 shows on [Control Panel> Sistem and sercurity> Sistem] that I have installed 4 GB, but only usable 1,96 GB. On CPU-Z program, [memory tab] shows 4 GB memory size and recognize its in dual channel. I had tried to reinstall my BIOS (F5 version, the latest BIOS version) without success on solving the problem.

System Info:

I'm using:

mobo socket 1156 Gigabyte brand, H55M-S2HP model;
CPU Intel i5 750 2.66 GHz,
Video NVIDIA GTX 470 with the latest driver.
Windows 7 64 bits OS


Thank you for your help.
 

coddyfile

Honorable
Jan 23, 2014
9
0
10,510
Well, the PC only boot if the 2 sticks is paired in the white slot or with one stick in the first white slot (it was always like that). I had tried all the 4 slots with 4 sticks and it worked like now: half of the total memory. Thank you for answering.