Pc wont boot/post after installing 2GB more ram

Hi all,

first of all here is my rig:

core 2 duo e8400 cpu
GA-EP45-DS3 Mobo
g.skill 4 X 1 GB pc8500 1066mhz 5-5-5-15
4870 gfx card

so i recently decided to upgrade to 4 GB of ram after initially having 2 GB running perfecly for over a year on windows vista 32BIT.
I got the extra 2GBs because i got win7 64 bit -------so i bought exacly the same ram as my old one G.skill 2 x 1 GB pc8500 1066mhz 5-5-5-15

The problem is the system wont boot after I install the 4 sticks of ram but will run perfecly fine with 2 sticks

Ive tried the 2 new sticks alone and they worked but using all of the 4GB wont let me boot the system I also tried diffrent combinations like old ram with new and results were that as long as its 2GB it will boot but not 4GB :cry:

after a lot of googling here are the thing i tried until now:

updated bios - nothing
shifted the sticks in diffrent combinations -nothing
i set the voltage to 2.0V and 2.1V in BIOS (on the ram the sticker says 2.0-2.1v) -nothing
i installed and reinstalled the sticks many times -nothing


Im really desperate ive tried everything

anyone has an idea of whats happening? im sure nothing is defective when it comes to hardware because i tried the sticks on the 2 other slots alone and system booted


Thanks in advance :cry:
7 answers Last reply
More about wont boot post installing
  1. Just for clarification you're now using Vista or Windows 7?
    With 4 sticks can you post, get to bios?
    Last, frequently boosting voltage one more tenth with 4 sticks installed, in your case try 2.2v.
  2. Well i managed to install win7 64 bit with 2 sticks

    with 4 sticks i cant see anything on screen so i cant get in bios
    will try 2.2V with all sticks in and will update you

    Thanks for your response.
  3. My coworker had a similar problem with booting with 4GB of RAM on his Windows 7 64-bit machine. He eventually found the fix in the BIOS, something about forcing the system to boot with 4GB of RAM.
  4. set the ram to 1:1 with a minimum of 1.9v (depending on what the memory wants) using 1 or 2 sticks of ram, then fit the other two and see how that goes

    its pointless running memory beyond 1:1, the 1066 is for overclocking and even then 1:1 is the way to go
  5. apache_lives said:
    set the ram to 1:1 with a minimum of 1.9v (depending on what the memory wants) using 1 or 2 sticks of ram, then fit the other two and see how that goes

    its pointless running memory beyond 1:1, the 1066 is for overclocking and even then 1:1 is the way to go



    thanks, can you please tell me how to set ram to 1:1 ? cause im not a expert lol
  6. roonj said:
    Just for clarification you're now using Vista or Windows 7?
    With 4 sticks can you post, get to bios?
    Last, frequently boosting voltage one more tenth with 4 sticks installed, in your case try 2.2v.



    trying 2.2V with sticks wouldnt even run the pc
    it runs ofr 2 secs then shuts down then re-runs 2 secs qnd shuts down again...
  7. any ideas guys?
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