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BOINC RAM advice plz

Discussion in 'Team OcUK Distributed Computing Projects' started by currob, Dec 22, 2015.

  1. currob

    Hitman

    Joined: Nov 15, 2011

    Posts: 901

    Location: Stafford

    2 of my machines have cheap h81 boards with 2 dimm slots that currently have 2 x 2GB DDR3 modules in each machine

    I am acquiring 2 x 4GB DDR3 modules (same make, speed and timings as the existing 2GB modules)

    As these machines only run BOINC would I be better off making each machine have 6GB (1x4GB & 1x2GB) but lose dual channel bandwidth (I have no idea if bandwidth or capacity is more beneficial for BOINC) or just put the new ram into one machine?

    Currently both machines are using virtually all of the 4GB physical ram they have installed but both have sata3 ssd's so the virtual ram / page file is reasonably fast.
     
  2. Coleslaw

    Associate

    Joined: Apr 16, 2014

    Posts: 78

    It depends on the project. Math projects like PrimeGrid will probably see a speed difference with faster memory. However, if you are doing a project that uses VM's... those projects will require more RAM regardless. There are a few other projects that are RAM hungry, so you really just need to plan them out.
     
  3. currob

    Hitman

    Joined: Nov 15, 2011

    Posts: 901

    Location: Stafford

    Thanks, I think I'll split the new ram and make 6GB on each of those machines then and see how it goes.
     
  4. JTG

    Associate

    Joined: Dec 23, 2015

    Posts: 13

    what i would suggest is ...
    check the specks on your MB (bios settings) ... see if it supports RAM Bank interleave ... as an example ... dual channel ram could have a 64 bit bandwith on the MB, but with bank interleave ... it would have 128 Bit bandwith ... this would be desirable

    ie. 4x 2 gig sticks would be better than 2x 4 gig sticks

    i know this doesnt help right now ... but something to keep in mind down the road
     
    Last edited: Jan 2, 2016
  5. currob

    Hitman

    Joined: Nov 15, 2011

    Posts: 901

    Location: Stafford

  6. JTG

    Associate

    Joined: Dec 23, 2015

    Posts: 13

    my bad ... in the first line of your first post it says ... 2 dimm slots
    this doesnt apply