Old ram was 1600, put in new 1600 and it says 1333

HP H8-1360T says 1333 or 1600 supported

It came with 2x4gb 2Rx8 PC3 - 12800U ( checked bios when I first started computer and it said 1600 speed )
Costco website said it came with 1333 speed memory though, maybe they ran out

I have 4x4gb 1600 Corsair Vengeance I installed and now with all four slots filled with 1600 the bios says 1333 speed


I also googled and see hp doesn't let you change the memory settings in bios either.

So why would the 2x4gb show as 1600 and the 4x4gb show as 1333?

I admit I am only moderately computer techy, I would normally google a lot more but I just googled for days installing a lift on my vehicle and just want a answer this time.
5 answers Last reply
More about 1600 1600 1333
  1. I'm not so sure if your motherboard supports 1600MHz memory according to the Hewlett-Packard website.

  2. Normally, RAM defaults to one of programmed profiles into memory which usually is 1333 speed. There are usually more than one profiles. Thus, there should be another profile for speed 1600. Usually you have to set it manually in BIOS. But it seems you are out of luck since you can't do that. Check if there is a setting to enable XMP profile. If not, you are out of luck.
  3. Thanks for responding. I read how Hp and Dell don't let you change the bios so idiots don't mess up their system. But seeing how they advertise it as 1333 or 1600 I thought the computer would detect what is installed and use that.

    So you are telling me it supports either speed be runs both at 1333, correct?
  4. It still doesn't explain why 8gb show up as 1600 but when I put in 16gb it shows it as 1333
  5. The standard speed for DDR3 (from a specification perspective) is 1333. Anything faster than that is technically overclocked.

    Regardless, the performance difference between 1333 and 1600 for most users is negligible.

    For kneeman, some motherboards will automatically down-clock memory, for optimal stability, when all memory slots are populated. It is a matter of power management and stability.

    In non-OEM systems, users can manually override these settings. In an OEM system, you may have to live with the 1333 settings.

    Good luck!
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