Memory 4 Gb (1,99 Gb usable)

Hi all!

I have a problem related about RAM and how Windows and the BIOS they use it. I have 4 Gb, and Windows and the BIOS just tells me that I have only 2 Gb (programs like CCleaner and others appears 4Gb, funny thing).

First of all, here you have my aspects:

Computer: GIGABYTE P55-US3L
CPU: Intel Core i5-750 (Lynnfield, B1)
2666 MHz (20.00x133.3) @ 1199 MHz (9.00x133.2)
Motherboard: GIGABYTE P55-US3L
Chipset: Intel H55 (IbexPeak DH)
Memory: 4096 MBytes @ 666 MHz, 9.0-9-9-24
- 2048 MB PC10600 DDR3 SDRAM - Kingston 99U5471-002.A00LF
- 2048 MB PC10600 DDR3 SDRAM - Kingston 99U5471-002.A00LF
Graphics: ASUS EN9800GT
nVIDIA GeForce 9800 GT, 1024 MB GDDR3 SDRAM
Drive: WDC WD10EALX-009BA0, 976.8 GB, Serial ATA 6Gb/s
Drive: WDC WD5000AAKS-00V1A0, 488.4 GB, Serial ATA 3Gb/s
Drive: HL-DT-ST DVDRAM GH22NS40, DVD+R DL
Sound: Intel 5 Series/34x0 Chipset PCH - High Definition Audio Controller [B3]
Network: RealTek Semiconductor RTL8168D/8111D PCI-E Gigabit Ethernet Adapter
OS: Microsoft Windows 7 Ultimate (x64) Build 7600

I have done 'msconfig', update the BIOS, but... I don't have any clue about how to continue to fix this problem. What should I do?

Looking forward your answer, thanks in advance!
4 answers Last reply
More about memory usable
  1. Have you tried Memtest?

    http://www.memtest.org/

    I don't understand this part
    CPU: Intel Core i5-750 (Lynnfield, B1)
    2666 MHz (20.00x133.3) @ 1199 MHz (9.00x133.2)

    Is your motherboard underclocking your CPU?
  2. bkoop said:
    Have you tried Memtest?

    http://www.memtest.org/

    I don't understand this part
    CPU: Intel Core i5-750 (Lynnfield, B1)
    2666 MHz (20.00x133.3) @ 1199 MHz (9.00x133.2)

    Is your motherboard underclocking your CPU?


    Not actually, now I have disabled the overclocking option long time ago and PC runs with the original speed. And about Memtest, no I still don't tried yet, but I will :).
  3. Does this make sense to anyone?

    4096 MBytes @ 666 MHz (from above)

    PC10600 ram should be running at 1333 MHz
  4. bkoop said:
    Does this make sense to anyone?

    4096 MBytes @ 666 MHz (from above)

    PC10600 ram should be running at 1333 MHz


    I have tried Memtest and the program tells me that there is not any error. BIOS tells me that RAM is running at 1333 Mhz, but programs like CPU-Z and HWinfo tells me 660 Mhz roughly. Here you have a pic about how the both modules of ram (#0 and #02) run using HWinfo and CPU-Z:

    HWinfo

    CPU-Z


    One question. Where I can find the option 'Memory remap' or 'Memory hole' On my BIOS? I don't see any option :(
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