I bought some new RAM for my Toshiba Satellite P500-14L laptop (max. memory 8GB according to Toshiba website).

  • Previously I had 2x2GB Samsung M471B5673EH1-CF8 1066MHz DDR3
  • Now I bought 2x4GB Kingston KVR13S9S8K2/8 1333MHz DDR3

I'm using Windows 7 64bit. The system is fine with the old RAM.

Normal mode: With the new RAM it crashes at the "Starting Windows" screen. There is no error, just black screen, all LEDs suddenly off crash. Then it restarts itself and the same thing happens.

Safe mode: It doesn't boot either, it crashes just seconds after hitting the Enter on "Start Win in safe mode". It appears to load some drivers or DLLs and then it crashes with a BSOD:


Both RAMs also fail when inserted one at a time, not only when both at the same time.

Possible causes:

  • Faulty memory? I ran the Windows Memory Diagnostic Tool, found no problems. Memtest86+ crashed itself about 4 seconds after it started. By crash I mean, power-off crash, where you hear the HDD stopping and generally everything is switched off at once. I tried to boot into Acronis Recovery (just to try something non-Win), it also crashed the same way (poweroff).

  • Compatibility error? Frequency mismatch? Other compatibility issue? How can I check? Which parameter is crucial? The sticks do work in another machine (Acer V5 121 C72G32akk). In that machine they boot up and everything works. I see no obvious compatibility mismatch in the specs so what could be going on?

I also updated the BIOS, although the latest version is from early 2011. No effect.

Could you give me some advice? Thanks.

  • 2
    I definitely would recommend running at least one full pass of memtest86+ and see if the memory comes up clean. Also check your BIOS; it might tell you if the memory is being recognized correctly. Also, you say that the system "is" fine with the old RAM; have you tried putting the old memory back in place and confirmed that the system is stable? Generally, the BIOS will downclock RAM if the highest operating frequency isn't supported, so the higher supported frequency shouldn't be a problem. Has the system ever had RAM overclocked? (Stale settings.) Consider a BIOS reset to factory defaults. – a CVn Aug 2 '14 at 19:22
  • Never overclocked. System seems stable when old RAM is reinserted (since approx an hour). Also see the update of the question. Stick works in another machine. – isarandi Aug 2 '14 at 19:37
  • It certainly sounds suspiciously like a compatibility problem. I'm not familiar with the hardware you have so can't really comment on that. I'd still try at least one full memtest86+ pass and see what happens. – a CVn Aug 2 '14 at 19:41
  • How many memory slots are there in the box? If there are 4, it may not be deigned to handle 4GB modules. – Daniel R Hicks Aug 2 '14 at 20:32
  • @DanielRHicks 2 slots, so that should not be the problem. – isarandi Aug 2 '14 at 20:35

Certain laptops are very specific on speed of the ram. Buy two 1066mhz 4gb sodimms and it will work without problem. 1333mhz ram is probably too fast.


The spec from the toshiba website for your laptop states only 1066mhz ram can be used in your machine, and the maximum is 8gb.

  • I read through forums before and anywhere I looked they said a faster RAM will work in a slower slot, in 99% of the time. They said it's mostly some Macs that are problematic but PCs should work fine. – isarandi Aug 3 '14 at 6:39
  • Not according to Toshiba's own specification. The list of speeds it would be compatible with are listed with the ram - Yours only states 1066. – JohnnyVegas Aug 3 '14 at 9:03
  • Do you think I can set any configuration on the laptop (downclocking) to make it accepted? If not, would all 1333 MHz RAMs not work there? – isarandi Aug 4 '14 at 8:49
  • I tried another 1333 MHz RAM in this laptop and it seems to work fine. Can this be, or will it crash sporadically? – isarandi Aug 4 '14 at 9:31
  • If I add the wrong ram to a macbook I have, it works for a little while - sometimes even a month - Then random system errors occur and that is because I was using the wrong ram. – JohnnyVegas Aug 27 '14 at 21:41

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