Announcement

Collapse
No announcement yet.

tRC 48 for F2-8500CD5D-4GBPK? No 1067 Mhz joy....:(

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • tRC 48 for F2-8500CD5D-4GBPK? No 1067 Mhz joy....:(

    (1067MHz operation may not be needed....see below) -Mike D

    Howdy,

    I could not obtain another 4 GB of the Corsair CM2X2048-8500C5 memory modules that I had purchased back in 2008. For reference, they are 5-5-5-15 tRC 22 memory modules. Finding that G.Skill F2-8500CL5D-4GBPK had the same 5-5-5-15 rating with a decent price...I decided to use those. Prior to getting the G.Skill I was 1067 MHz with the Corsair and no memory issues at 4 GB.

    So I plug in the new memory modules, but since I didn't have any apps needing 8 GB immediately, I tried MemTest 4.20. I did have errors with the new modules....so I pulled up CPU-Z to see what might be going on. The Corsair modules have a tRC of 22 and the G.Skill modules have a tRC of 48.....hmmmmmm....Why is the tRC for these modules so HIGH? I mean it's more than double the tRC of the modules from 4 years ago (I'm assuming a higher number is not a better number when it comes to memory modules). Anyway, I try to adjust the tRC manually in my BIOS (ver 2001 for ASUS M3A78-T....newest), however, the BIOS only lets me go up to tRC of 41.

    So I've tried a few recommendations I saw for the example ASUS M3A78T-E as the sticky....I can't get to 1067MHz with the G.Skill modules (well, I haven't tried unplugging the Corsair) and I'm running at 800MHz right now with 5-5-5-18 tRC24 2T for stability's sake.

    I've tried cranking the memory up to 2.0v and 2.1v, HT and NB to 1.4v....using AUTO and the manual settings listed for the M3A78T-E sticky. No dice.

    Am I stuck in 800 MHz land or am I missing something here to get to 1067MHz? I know this board is a AM2+, but I have a Phenom 2 975 processor (AM3) in the socket and I think it might be able to address all the 1067 MHz ram (aren't they set up for DDR3 1333?). Or is my mobo the limiting factor here? Thanks in advance for any advice.

    Mike Doerner

    Asus M3A78-T
    AMD Phenom II 975 BE 3.6 GHz
    4 GB Corsair CM2X2048-8500C5
    4 GB G.Skill F2-8500CL5D-4GBPK
    ATI FirePro V5800
    Some ginormous CPU cooler from 4 years back....
    An ATX case from 2003
    850W power supply (SilverStone?)
    Last edited by mdoerner; 05-05-2012, 01:55 PM.

  • #2
    DOH!

    There is a ASUS M3A78-T config here....I'll give that a whirl before I complain again....

    Mike Doerner

    Comment


    • #3
      OK, I tried the 1067 MHz specs....they failed and seemsed to run pretty slow during memtest....however....

      One of the GKILL TECH (Admin) in a previous post stated 800 MHz on 4-4-4-12 timing with 2.0 Volts is FASTER than 1066 MHz CL5.

      800 MHz 4-4-4-12 timing works for my mobo (I'll test completely this evening....got to 46% memtest w/o errors....the 1067 MHz never got beyond 15% on memtest).

      The only 2 questions I have...

      1.) For curiosity's skake...why is tRC 48 in the 1067 MHZ settings for the G.Skill memory modules? Corsair from 2008 is only tRC 22. Seems to be a step backward.

      2.) Why is 800 4-4-4-12 faster than 1067 5-5-5-15?

      Thanks!

      Mike Doerner

      Comment


      • #4
        The PK series is an older line of sticks That I believe dates back to around 2006, and was considered high end at it's release, in the various sets they are very stable and reliable....the line has been a steady seller over the years for it adaptability to most all platforms. They were followed by the original PI lines that were more centric towards the P45 chipset and timings wise were tighter. As far as freq/speed, many sticks can gain a performance increase by lowering the freq and tightening the timings and with many mobo/CPU combos they are happier and more stable at 800 than 1066.


        Pls offer comments on support I provide, HERE, in order to help me do a better job here:

        Tman

        Comment


        • #5
          Thanks!

          Mike Doerner

          Comment


          • #6
            No problem, keep us updated


            Pls offer comments on support I provide, HERE, in order to help me do a better job here:

            Tman

            Comment

            Working...
            X