AIDA64 Memory Benchmark

AIDA64 provides a basic synthetic benchmark for comparing the read, write, and copy performance of system memory while also measuring latency. This should provide us the raw bandwidth for each memory configuration that was tested. Later on, we'll see how this translates into real world performance.

AIDA64 v1.60.1300 - Memory Read

AIDA64 v1.60.1300 - Memory Write

AIDA64 v1.60.1300 - Memory Copy

AIDA64 v1.60.1300 - Memory Latency

Our preliminary results show us the expected memory scaling. The faster DDR3-2133 memory has a ~36% advantage over the slowest DDR3-1333 memory in the read test, and the copy and latency tests show similar results. However, the write test closes the gap with only a ~7% difference between the fastest and the slowest. Overall, we see a linear performance increase as the memory clock speed is raised as well as when the CAS latency is lowered. Synthetic tests are really the best-case scenario, so let's move on to find out how the extra raw bandwidth affects our other tests.

Test Configuration and Settings LINPACK and PCMark 7
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  • vailr - Monday, July 25, 2011 - link

    No discussion of differing voltages?
    A quick check for DDR3 at Newegg shows:
    G.SKILL ECO Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
    @ 1.35 volts & Cas Latency: 7
    vs.
    G.SKILL Ripjaws X Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
    @ 1.50 volts & Cas Latency: 6
    A more thorough consideration of these two DDR3 modules might be interesting.
    For virtually the same money, aren't most people going to seek out DDR3 with the lowest possible CAS latency number, and also combined with the lowest possible voltage design?
    I know that: I wouldn't consider buying any DDR3 memory modules with a (nominal) CAS latency higher than 7.
    Reply
  • JarredWalton - Monday, July 25, 2011 - link

    Just as we didn't test with ten different modules (for ease of testing), we didn't use different voltage memory. Whether your RAM is 1.5V or 1.35V, at the same timings and speed the performance should be identical (less than a 0.5% difference). And we did look at the effect of lower latency RAM; sure, at the same price buy lower latency and higher bandwidth RAM, but prices aren't the same, particularly on 2x4GB kits. Reply
  • Tchamber - Monday, July 25, 2011 - link

    I'd like to see how these tests stack up against the tripple channel nehalem i7's. Reply
  • duploxxx - Monday, July 25, 2011 - link

    compare with what an EOL platform? it was alreay known that there is no added value with memory speed testing on these systems, just like the previous gen., 1366 is dead testing has been done in the past
    This test just showed that it is a lot of wasted money and time investigated in this.

    They better take the time and investigate further into Liano memory speed, something that really does scale with memory.
    Reply
  • Finally - Monday, July 25, 2011 - link

    It's already done, see Computerbase... Reply
  • JarredWalton - Monday, July 25, 2011 - link

    We've done it as well for graphics applications:
    http://www.anandtech.com/show/4476/amd-a83850-revi...

    We haven't done the application testing with different DDR3 on Llano, however.
    Reply
  • banwell - Monday, July 25, 2011 - link

    You can also get a nice 'free' bump in performance at 1600 by switching to 1T. Something the better quality memory will be able to do easily. Reply
  • AssBall - Monday, July 25, 2011 - link

    I'm not sure why they didn't test 1T . It is a memory scaling article after all. Anyway TechReport did and their conclusions are about the same, I.E. unless you are overclocking and running synthetic benchmarks, it doesn't really matter. Reply
  • compudaze - Monday, July 25, 2011 - link

    Lowering the command rate from 2T to 1T at DDR3-1600 doesn't necessarily mean you can do the same at DDR3-2133. Not all memory modules, CPU's and motherboards are creased equal. Testing all configurations at 2T kept the results comparable. Reply

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