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Thread: EP43-DS3L / PC2-8500 problem




  1. #1
    Join Date
    Jan 2009
    Posts
    19

    Default EP43-DS3L / PC2-8500 problem

    Hi there... first time poster and first time overclocker here. I've scoured/lurked these boards for answers and read as much as I could including a couple O/C guides. Thanks in advance if anyone can point me in a direction.

    My problem is that the RAM will not run at 1066 speed. Nothing I do can get these dimms to run above 400mhz/800hz. I ran memtest86 2.11 for 6 hours with no errors at the bios settings below so I think the dimms are good, however memtest sees them as "399 MHz (DDR799) / CAS 5-6-6-18 / Dual Channel; 4095M 4381 MB/s", but all that is probably from my Bios settings right? If I set these at 1066 in the bios, the thing won't post. The default bios says "Memory Frequency (Mhz) ....800..........: 800" so it's definitely not seeing these as 1066. In WinXP 64, MemSet's (& cpuz) SPD shows the voltage at 1.8 but PC Health shows it slightly above 2.0. They're in slots 1 and 3. Should I try slots 2 and 4 or switching which dimm is A? I have tried several things per the many posts on this board. I see many people having problems with PC2-8500 2x2 in P43/P45 boards though, and I'm wondering if it's possible. Per Lsdmeasap, 2x2 pc2-8500 "always" requires manual DRAM settings in an EP43. This gives me hope. I'm hoping someone here can either tell me to give up and run the memory at 800 or point me to a site that explains how the Skews work for manually setting the timing for this DIMM/MB combination.. Would 4x1 dimms work better in this board?

    At least I've got the thing o/c'd and stable at 3.5 GHz at 56/56 deg C at load with the stock cooler.

    My rig:
    Intel® Boxed Core 2 Duo Processor E7400 (stock cooler)
    GA-EP43-DS3L 775 ATX Motherboard
    Gold Edition 4GB PC-8500 DDR2 Memory Kit (Two 2GB DDR2-1066 Memory Modules)
    Verto GeForce 9600 GT 512MB PCIe 2.0 Graphics Card
    Phantom Mid Tower ATX Case with 500W Power Supply


    Current Settings running stable (8 hours prime95 at 3.5 GHz 56 deg C):
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Turbo
    CPU Clock Ratio ..........................: 10x
    Fine CPU Clock Ratio.....................:.+0.5
    CPU Frequency ...........................: 3.0GHz(333x10.5)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 333 Mhz
    PCI Express Frequency (Mhz) .........:Set to 100

    C.I.A.2 .................................:[Disabled]


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: 800mV
    PCI Express Clock Drive.................: 900mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)...................: 0ps


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    (G)MCH Frequency Latch...............: 333MHz
    System Memory Multiplier ..............: 2.40B
    Memory Frequency (Mhz) ....800..........: 800
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................6
    tRP'...........................................6
    tRAS..........................................18

    Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

    Advanced Timing Control
    tRRD...................................3........Au to
    tWTR...................................3.......Aut o
    tWR....................................6........Au to
    tRFC..................................56.........5 8
    tRTP..................................3.........Au to
    Command Rate (CMD) ..............0......:Auto

    Driving Strength Profiles
    Driving Strength ............................1066MHz (A&B)

    Channel A
    Static tRead Value................7.........:9
    tRD Phase0 Adjustment...................: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

    Channel B
    Static tRead Value...............7..........:9
    tRD Phase0 Adjustment...................: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….……….....1.26250V....................:1.3500 0V (1.332 in PC Health, 1.296 in cpuz)
    CPU Termination…..... 1.200V*.......: 1.300V
    CPU PLL……....……....1.550V*.......: 1.550V
    CPU Reference………....0.805V*.......: Auto

    MCH/ICH
    MCH Core…………….....1.100V...........: 1.400V (had this increased trying to increase fsb, could probably be reduced)
    ICH I/O……………….....1.550V............: 1.550V

    DRAM
    DRAM Voltage ……....1.800V............: 2.100V

    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]

    Integrated Peripherals
    Legacy USB Storage Detect ..............[Enabled]
    Last edited by AirAl; 01-28-2009 at 09:57 PM.

  2. #2
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    Forgot to mention that my BIOS version was F8 during my testing, but I just updated it to F9a (beta) to see if that helped.

  3. #3
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    FYI, found a nice explanation of clock skew and the effects it has on system memory here. Reading that now...

  4. #4
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    Update: Tried several things yesterday... cpu & mch skews (400/100, 200/0, 100/0), beta f9a bios, f7 bios, etc. I'm back to 333x10.5, 3.5GHz and expensive 800 MHz RAM. As I see it, the ep45 and the OCZ Gold PC2-8500 just don't communicate at 1066 MHz. The fsb can't seem to get beyond about 340, possibly due to the memory. That compares to the 400+ MHz that many get. I'm thinking of returning the dimms to Microcenter since I bought the board there too and the packaging implies compatibility.

  5. #5
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    Update: Got some input from the OCZ site:
    "CPU Host Frequency to 266
    Set the System Memory multiplier to 4.0a (I believe it is A, check the right margin for the 266 setting)
    Set the ram timings to
    CAS = 5
    Trcd = 6
    Trp = 6
    Tras = 18
    Memory voltage at 2.0V to start. Try 2.1V if that fails.

    Everything else at Auto."

    I then tried that every which way to no avail. Does anyone have any suggestions on some magic memory settings that might make this ep43-ds3l run this memory faster than 800 MHz? It's rock solid at 800 with the e7400 at 3.5GHz, but the board won't even post at 1066. At my wit's end... I've tried everything I could google.

  6. #6
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    bump

  7. #7
    Join Date
    Jan 2009
    Posts
    19

    Default Re: EP43-DS3L / PC2-8500 problem

    Ha! Swapped out my OCZ Gold PC2-8500 for Patriot PC2-8500 and voila, I'm getting 1066 speed stably now. Freaking OCZ goes back tomorrow. Now I'll see what I can do with this machine.

  8. #8
    Join Date
    Sep 2008
    Posts
    990

    Default Re: EP43-DS3L / PC2-8500 problem

    RAM is very often not compatible. There are just too many combinations possible for the manufacturers tor try all and because of this there can always be incompatabilities.
    I have the OCZ Platinum 1066 4GB kit btw and it runs perfectly. I'm happy with it so I'm getting another one actually to play with 8GB :)


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