Windows 7 and 8gb RAM, wont boot

Hey all,

I have a Toshiba Satellite L505d-s5965 that I've had for about 2 years. The 3gb standard memory just didn't seem like it was hacking it so I picked up 2x4gb sticks that I dropped in. I've upgraded the OS to Windows 7 Ultimate, so 8gbs shouldn't be a problem, right? System won't boot with both 4gb sticks in, however if I throw in one 4gb stick and the old 2gb stick, it boots up no problem. I've checked and flashed the BIOS, there's no options under BIOS for memory so I'm not sure what it is. Any suggestions?

p.s. When I put both 4gb sticks in and enter the BIOS, it reads the full 8192, so...someone please help!
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  1. Bclark120573 said:


    p.s. When I put both 4gb sticks in and enter the BIOS, it reads the full 8192, so...someone please help!


    8192 = 1024 x 8 = 8GB

    Where is your problem?

    Have you updated your BIOS?

    Are you using 64bit version of your Win 7?
  2. laptops are notoriously picky about Ram. Many of them have ridiculously low limits on what they will accept, and if the timings are off just a little then they will not post. My bet is that the ram you bought is 1) too much (check manufacture's website for Max Ram supported), or 2) just off enough from the expecting timings that is dosn't want to play nicely. Find the system specs on the original stick of ram and try to match it as close as possible. It has to have the same MHz rating, as well as timings (typicality 9,9,9,24 or something similar for DDR3)

    Win 7 Ultimate (the same as Pro by the way, you may want to try to get some money back on that) 64bit will do 4GB or more, the 32bit version will not, and that is true for home and pro versions as well.
  3. 8GB will work in your laptop as said by crucial.

    8GB Kit (4GBx2), 200-pin SODIMM, DDR2 PC2-6400 memory module
    http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=36E3B7BDA5CA7304

    As suggested above the RAM timings may be out. or you may have bought ECC instead of Non-ECC.

    We can only guess unless you give us information about the RAM.

    If you still have the manual look at that or call the helpline if you are not a very advanced computer user.

    Hope i helped,
    Bud
  4. I used CPU-z to compare them and here is what I've got. Everything seems to match up with them...

    Memory SPD
    -------------------------------------------------------------------------

    DIMM # 1
    SMBus address 0x50
    Memory type DDR2
    Module format SO-DIMM
    Manufacturer (ID) Samsung (CE00000000000000)
    Size 2048 MBytes
    Max bandwidth PC2-6400 (400 MHz)
    Part number M4 70T5663EH3-CF7
    Serial number 769E628A
    Manufacturing date Week 15/Year 09
    Number of banks 2
    Data width 64 bits
    Correction None
    Nominal Voltage 1.80 Volts
    EPP no
    XMP no
    JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1 4.0-4-4-12-16 @ 266 MHz
    JEDEC #2 5.0-5-5-15-20 @ 333 MHz
    JEDEC #3 6.0-6-6-18-24 @ 400 MHz

    DIMM # 2
    SMBus address 0x52
    Memory type DDR2
    Module format SO-DIMM
    Manufacturer (ID) (0000000000000000)
    Size 4096 MBytes
    Max bandwidth PC2-6400 (400 MHz)
    Part number
    Manufacturing date Week 47/Year 11
    Number of banks 2
    Data width 64 bits
    Correction None
    Nominal Voltage 1.80 Volts
    EPP no
    XMP no
    JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1 4.0-4-4-12-16 @ 266 MHz
    JEDEC #2 5.0-5-5-15-20 @ 333 MHz
    JEDEC #3 6.0-6-6-18-24 @ 400 MHz

    Block Bud said:
    8GB will work in your laptop as said by crucial.

    8GB Kit (4GBx2), 200-pin SODIMM, DDR2 PC2-6400 memory module
    http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=36E3B7BDA5CA7304

    As suggested above the RAM timings may be out. or you may have bought ECC instead of Non-ECC.

    We can only guess unless you give us information about the RAM.

    If you still have the manual look at that or call the helpline if you are not a very advanced computer user.

    Hope i helped,
    Bud
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