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Thread: EP45-DS3L: Almost there, what next




  1. #1

    Default EP45-DS3L: Almost there, what next

    Many thanks to the folks on this forum - I'm new to overclocking and I've spent many hours here reading and getting introduced to it! I'm almost there (I think) - prime is now failing after running for hours. A couple of questions.

    System:
    Motherboard - EP45-DS3L (F10)
    Memory - 4GB (2x@GB) OCZ Platinum Vista Upgrade DDR2 PC2-6400 http://www.ocztechnology.com/product...m_dual_channel
    CPU - E8400
    Arctic cooling Freezer 7 pro.
    Antec 1200 case
    Corsair 750 watt power supply
    cheap low power video card
    12 TB Sata disks

    System is for academic research - goal is to reduce an upcoming 15 day CPU time experiment by several days. System is running Linux (Fedora 10).

    Questions:
    1. What other good linux tools should I be using? At the moment I'm using
    memtest86+ (v2.10) boot CD
    mprime (prime95) torture test
    lm_sensors for temp and voltage
    2. I'm still not clear on the implications of using, for example, system memory multiplier of 2.00D as opposed to 2.00B. My understanding is that strap D should be used if it works, but B is more forgiving. Is that right?
    3. I'm seeing large temperature differences from minor changes to Vcore. Going from 1.200v to 1.225v has decreased the temperature from 67 to 55 under mprime torture load. I was not expecting that at all; is it reasonable?
    4. Here's my current settings (mprime has been running an hour on them so far). Does anyone have suggestions (very vanilla settings for a 3.0 -> 3.96 overclock at the moment).

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: AUTO
    CPU Clock Ratio ..........................: 9X
    Fine CPU Clock Ratio.....................: +0.0
    CPU Frequency ...........................: 3.96GHz

    Clock Chip Control Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 440

    PCI Express Frequency (Mhz) .........: 102
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: 800mV
    PCI Express Clock Drive.................: 800mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)...................: 0ps

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 800 880
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................ 5
    tRCD ......................................... 4
    tRP'........................................... 4
    tRAS.......................................... 15

    Advanced Timing Control
    tRRD........................................... 3 Autot
    WTR.......................................... 3 Auto
    tWR............................................ 6 Auto
    tRFC...........................................54 Auto
    tRTP........................................... 3 Auto
    Command Rate (CMD) ....................:0 Auto

    Driving Strength Profiles
    Driving Strength ............................
    Channel A
    Static tRead Value.........................:11 [Auto]
    tRD Phase0 Adjustment...................:0Auto
    tRD Phase1 Adjustment...................:0 Auto
    tRD Phase2 Adjustment .................:0 Auto
    tRD Phase3 Adjustment..................:0 Auto
    Trd2rd(Different Rank)....................:6 Auto
    Twr2wr(Different Rank)...................:6 Auto
    Twr2rd(Different Rank)...................:5 Auto
    Trd2wr(Same/Diff Rank)..................:8 Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Channel B
    Static tRead Value.........................:11 Auto
    tRD Phase0 Adjustment...................:6 Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.2250V
    CPU Termination…..... 1.200V*.......: Auto
    CPU PLL…………………....1.550V*.......: Auto
    CPU Referen.…………....0.805V*.......: Auto
    MCH/ICH
    MCH Core…………….....1.100V...........: Auto
    MCH Reference….…….0.760V...........; Auto
    MCH/DRAM Ref.…......
    ICH I/O……………….....1.550V............: Auto
    ICH Core…………...…

    DRAM
    DRAM Voltage ……....1.900V............:
    DRAM Termination

    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Enabled]
    Integrated Peripherals
    Legacy USB Storage Detect ..............[Enabled]


    Following guide procedures to determine max memory speed (undermultiplying CPU), things seemed to be much more insensitive than everything I've been reading. Memory speed of 924 was fine for short tests, memory speed of 933 would eventually freeze memtest (often after 10 minutes), and anything above wouldn't post (speed would revert to either 800 or 933). Didn't matter what the voltage was or what the memory timings were. I don't see any reason I would ever need to exceed 900 with my setup (is there one?), so I didn't fine tune any more.

    The Arctic cooling freezer 7 was definitely required. The "Instant gratification" settings sent the temperature up to 82 (under torture load) with the stock CPU cooler, but only 57 with the Arctic 7. (And as I said, I'm now at 55 with a much more substantial overclock (33% instead of 10%) after adjusting Vcore.

    Any suggestions as to what to attack next? Settings above failed after 2 hours of mprime.
    Thanks
    Last edited by CrispyCritter; 12-19-2008 at 08:41 PM. Reason: Made memory spec more explicit

  2. #2

    Default Re: EP45-DS3L: Almost there, what next

    Being suspicious of my lack of problems with memory at very high speeds, I ran memtest overnight at lower speeds and discovered that indeed I had problems. I had 8 errors in 8 hours. This was
    FSB 295
    CPU mult 6 (CPU speed 1770)
    mem mult 3.00A (Mem speed 885)
    everything else baseline settings.

    All errors were in memtest test 5, all were the same bit in two different "clusters" of memory (most 10-20 MBytes difference). Several full passes had no errors at all.

    Note that my "finger probes" of the memory and ICH10 cooler never got anything other than "pleasantly warm". There was just no heat building up - perhaps due to the number of fans
    in the setup.

    Evidently the overclocking guide instructions of running the first 3 tests weren't sufficient to tell enough for my particular memory. So my plan is to repeat my "guide" memory investigations, running only test 5.
    Anything else to try? Should I be using a different strap in my tests? I used strap A since it was the only one with a 3.0 multiplier, trying to follow the sticky P35 guide as much as possible. (The only real problem in the P35 guide I had was trying to figure out how to adapt it to the P45 straps and memory multipliers - that took a while!)
    Chris

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