Memory Latencies

iDunnoiDunno Dallas, Tejas
edited February 2004 in Hardware
Hello, i have the option to change the latency of my memory.
i have the corsair xms 2 sticks of 512 pc3200 c2 ram with black headspreader.

What is the lowest latency i can set the memory at.
I tried it on 2-2-2-7 and windows did not load but i didnt try it again because i got scared.

right now the latencies are at 2.5-3-3-8

What is the lowest latencies i can set the memory to get the highest performance.
thanks
fsb is on 200mhz

Comments

  • GHoosdumGHoosdum Icrontian
    edited February 2004
    Corsair XMS is supposed to be able to run at 2-2-2-6... however, every manufacturer comes out with a bad stick of RAM from time to time. At any rate, the last number should be set to 11 for best performance in an nForce2 motherboard, regardless of the others. For some reason, it works better that way...
  • iDunnoiDunno Dallas, Tejas
    edited February 2004
    11 for tras?
  • GHoosdumGHoosdum Icrontian
    edited February 2004
    11 for the number you have as 7 and 8 - I think it is TRAS.
  • iDunnoiDunno Dallas, Tejas
    edited February 2004
    why do we set the tras higher, are lower latencies supposed to be faster?
  • GHoosdumGHoosdum Icrontian
    edited February 2004
    It's got something to do with how the memory controller on the nForce2 works. Yes lower numbers are traditionally better, and it bugs me to raise it too... but somehow it really does increase memory performance.
  • mmonninmmonnin Centreville, VA
    edited February 2004
    Bench it to find out for yourself iDunno.
  • hypermoodhypermood Smyrna, GA New
    edited February 2004
    GHoosdum wrote:
    Corsair XMS is supposed to be able to run at 2-2-2-6... however, every manufacturer comes out with a bad stick of RAM from time to time. At any rate, the last number should be set to 11 for best performance in an nForce2 motherboard, regardless of the others. For some reason, it works better that way...

    The newer XMS3200LL based on Winbond CH-5 modules is rated at 2-3-2-6. I know this for a fact as I have V1.1 (BH-5) sticks which will do 2-2-2-6 and V1.2 (CH-5) sticks that are rated for and will only do 2-3-2-6. In general the CH-5 based stuff will not run 2-2-2-6 although some have had success. Seems like lsevald is one of the lucky ones.

    As GHoosdum said, set the TRAS to 11. This has been proven to be the fastest when running 2-3-2/2-2-2.
  • iDunnoiDunno Dallas, Tejas
    edited February 2004
    ok with my stock settings
    amd athlon xp 3000+ 333mhz
    corsair xms pc3200 2-3-3-6 at 333mhz
    radeon 9800pro at stock i get 5688 on 3dmark2003

    i overclocked to
    amd athlon xp 3200+ 400mhz
    latency 2-3-3-11 at 401mhz
    same vid card at stock
    i got 5765

    so increase of 77 points.
  • MJOMJO Denmark New
    edited February 2004
    The Tras setting is another nForce2 specialty.
    There's quite a few of them.
  • iDunnoiDunno Dallas, Tejas
    edited February 2004
    link?
  • GHoosdumGHoosdum Icrontian
    edited February 2004
    http://www.short-media.com/forum/showthread.php?t=7869&highlight=latency+11
  • MJOMJO Denmark New
    edited February 2004
    Here's another link
    http://short-media.com/forum/showthread.php?t=7710
    There is a link to an article as well.

    Here's another:
    http://www.short-media.com/forum/showthread.php?s=&threadid=1787&highlight=timings+help
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