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Lower frequency than expected

Hello, I have a question about memory frequency. I have two memory modules of the type 4 GB Corsair XMS3 DDR3 1333MHz.

Today I tried the Memtest86+ tool and runned the test for a few hours, everything looked good. However I noticed that the tool displayed the memory as running as:

535 Mhz (DDR3-1070) / CAS 7-7-7-20 / Dual Channel

As I do not know these memory internals I am not sure if this is normal and expected, or is something wrong when this supposed 1333 Mhz maybe is running at 535?

Inside Windows I runned cpuz which seems to display the same result, see below.
So, normal or strange?

7 answers Last reply Best Answer
More about lower frequency expected
  1. When seeing Jaxx89 new thread with a very similar question, I could also add some more information:

    CPU: Intel Core i7 860 2,8 Ghz
    Motherboard: ASUS P7P55D-E LX

    No overclocking is done.
  2. Hello, sorry to bump the thread, but I am still curious about this. I would be very grateful if anyone could confirm that this is normal or something unexpected?
  3. Best answer
    Its fine,
    basically you take the number its running at, times it by 2 and that gives you the rams speed, i.e. 535x2=1070MHz, which although isn't 'full speed' is fine.
    if you look on your cpu-z screen, it shows that ram timings you have are 7-7-7-20-27, change them in bios to the timings under Jedec4 9-9-9-26-35, that should get you closer to 1333Mhz
    Moto
  4. Motopsychojdn said:
    Its fine,
    basically you take the number its running at, times it by 2 and that gives you the rams speed, i.e. 535x2=1070MHz, which although isn't 'full speed' is fine.


    Thanks a lot for your answer! The most important thing is just that it is fine, and if not perhaps optimal it is still normal. I might later do these BIOS adjustments you mention, but for the time being I will keep it default.

    Thanks for just clearing that up.
  5. No problem, glad to help :)
    Moto
  6. Best answer selected by ricno.
  7. Thank you for B.a. man :)
    Moto
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