RAM upgrade brought WORSE performance. Acer Aspire 5 A515-51G

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panos_chr
panos_chr Member Posts: 25 Enthusiast WiFi Icon
Hello,

I have an Acer Aspire 5 A515-51G which had 8GB total RAM (4GB soldered + 4GB in slot). Maximum RAM capacity is 20GB so I recently purchased an 16GB  (after being sure that it fits the criteria and characteristics). Now I have 20GB total running in Flex Mode as far as I'm concerned (CPU Z says dual so that's a sign).
My problem is that before changing the slot I run some tests (UserBenchMark and PassMark PerformanceTest) in order to see the difference of Before-After. 

PassMark PerformanceTest:
I found out that Memory Write has gotten worse (11676 Before - 7487 After) as well as Database Operations (2938 Before - 2249 After).
UserBenchMark:
Before my RAM scored a 62.2% and After 44.3% (with significantly dropped values at Multi core and Single core scores).
Also while runnig the test I saw memory latency getting a higher value than the previous test.

Anyone have a clue why my RAM upgrade brought me worse performance? Is it because it runs 4GB+4GB Dual Channel and the rest 12GB Single Channel? Can I do something to minimize that gap?

I will attach photos of my Before-After results in order to understand better.
Thank you in advance!

Answers

  • brummyfan2
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    Hi,
    It could be the difference in CL values, could you please post the Memory tab and SPD tab for both modules(ADATA 4GB and CORSAIR 16GB).

  • panos_chr
    panos_chr Member Posts: 25 Enthusiast WiFi Icon
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    Hi,
    It could be the difference in CL values, could you please post the Memory tab and SPD tab for both modules(ADATA 4GB and CORSAIR 16GB).

    Hi,
    I will provide you these screenshots but I don't think it has to do with CL values, because I checked to buy the same CL before I buy the Corsair 16GB in order to much perfectly.
    On SPD Tab there is nothing showing up for Slot #2.


  • brummyfan2
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    Yes, onboard memory will not show up in CPU-z, I have no idea why 8GB performs better than 20GB, sorry, please wait for someone else to chime in.
  • panos_chr
    panos_chr Member Posts: 25 Enthusiast WiFi Icon
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    Yes, onboard memory will not show up in CPU-z, I have no idea why 8GB performs better than 20GB, sorry, please wait for someone else to chime in.
    Alright, thanks for your time!
    I will wait for other replies too.