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Thread: GA-EP45-DS3R + Kingston PC6400 CL5




  1. #1
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    Default GA-EP45-DS3R + Kingston PC6400 CL5

    Hi there

    I hope somebody can help me!!! (Please :) )

    I have recently built a new system up mainly comprising of:

    Intel Q6600 (default clocks)
    Gigabyte GA-EP45-DS3R (F9 Bios)
    Kingston KHX6400D2K2/4G 2x2GB 800Mhz memory kit (slots 1&3)
    Vista Home Premium 64bit
    Antec Earthwatts 500W PSU

    My system has been pretty unstable when tinkering with the RAM so far with quite a few complete freezes in windows and many, many restarts :(

    According to the RAM's datasheet (http://www.valueram.com/datasheets/KHX6400D2K2_4G.pdf) and to CPUZ and Gigabyte EasyTune, the SPD reports the max speed as 667Mhz@5-5-5-15@1.80V.

    Obviously, when choosing Auto for everything in the Bios, it uses those settings above. I would like to use it at 800Mhz with 5-5-5-15 timings, but have really had no luck getting it stable.

    I tried entering those settings manually along with bumping up the DDR voltage to 1.84/1.86V (1.85V according to the RAM's datasheet) in the Bios but the PC restarts a couple of times and resets everything back to default.
    I have also tried increasing the MCH voltage to 1.2 (from the default 1.1)

    If I change just the frequency to 3xFSB (800Mhz), the PC can post, although the Auto Timings result in 5-6-6-18 according to CPU-Z.

    How do I get the 5-5-5-15 timings? And can the fact that this RAM is double sided (16 components per stick) have anything to do with my problem ?

    (I now wish I had chosen some more expensive RAM, or even RAM that was on the supported list !!! )

    Thank you in advance for your help.

  2. #2
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    Ah, I do apologise - I have just seen the sticky'd post about timings etc, so I will try the suggestions in that, and if i have not solved it, I will let you know!!!

    Thanks

  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    I would suggest you use 1.85 or 1.9V for the ram, and set MCH to 1.2-1.3 for 2x2GB of ram.

    I see you picked cheaper ram, like you said that is not likely a very good choice. But I am sure we can get you working

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 9
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 2.394


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 266Mhz
    PCI Express Frequency (Mhz) .........:Set to 100


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


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [333]
    System Memory Multiplier ..............: 3.00
    Memory Frequency (Mhz) ..............: 798Mhz
    DRAM Timing Selectable ................: [Manual]

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

    Advanced Timing Control
    tRRD...........................................3-4
    tWTR..........................................4-6 (Also try 8-12 if the lower range fails)
    tWR............................................3-6 (Also try 8-14 if the lower range fails)
    tRFC...........................................52-62
    tRTP...........................................3-6
    Command Rate (CMD) ....................:2

    Channel A
    Static tRead Value.........................:7-10
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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.........................:7-10
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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….……….........................: [Auto or Normal]
    CPU Termination…..... 1.200V*.......: <<< Leave
    CPU PLL…………………....1.500V*.......: <<< Leave
    CPU Referen.…………....0.755V*.......: <<< Leave
    CPU Reference2………,,0.800V*.......:<<< Leave

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.2-1.25-1.3 <<< Needed for 2x2GB, somewhere in the middle is likely best

    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave

    DRAM
    DRAM Voltage ……....1.800V............: 1.85-1.9 (Check in Easytune, or system health in the BIOS to be SURE it is giving them 1.85 or more with no drop in voltage. As the PDF States you will need at least 1.85 for 800Mhz
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    If you plan to overclock, you will need to disable the following

    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................: [Disabled]

  4. #4
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    Hi Lsdmeasap

    Thanks for your quick reply!

    I tried the settings above with all of the advanced settings set to the maximum value recommended (eg: tRFC=62), but it unfortunately did not work - after restarting the PC did the whole shutdown, startup 3 times thing and reset everything to default.

    I also updated to the latest Bios F10g.

    One thing that I did try was use the Memset program and it looks like I can use 800@5-5-5-15@1.85V if I change it in Windows. I set the 800Mhz and 1.85V in the Bios and then, when in Windows, I change the timings.

    After I change them, the value is updated in CPU-Z's window (See screenshots below). The system appears stable at this point, although I will need to do some proper stress testing.

    The only problem now though is that, when I restart, the timing settings revert back to 5-6-6-18 and I need to change them in Windows again. This is not a huge problem, but isn't ideal.

    Do you think the timings are actually being updated with MemSet and they are currently 5-5-5-15 ?
    It is pretty strange that the system is stable, yet the Bios won't allow the timings...

    Also, anything else I could try ?

    Thanks again!




  5. #5
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    First, I would suggest against a Beta BIOS, they normally have some issues and it is generally RAM problems in the ones I have used.

    No, memset as you used it will only set them right then. They will be gone on a reboot. It can save and apply them at each boot, but this is advised against as it is not the way to do things

    What MCH latch did you use? 333 as I posted? If so, try the 266 one, and then you will also need to change the memory multiplier to a multi that will allow your ram speed to be closest to 800. Like you may need to use 2.66 or 3.20. I am not sure which options the 266 strap will allow you to choose. If you are unsure about what I mean here let me know, if you do get it good then try the 266 MCH latch and change ram multi to the one closest to 800MHZ

    Like so
    (G)MCH Frequency Latch...............: [266]
    System Memory Multiplier ..............: 3.00 << Whichever is closest to 800 below >>
    Memory Frequency (Mhz) ..............: 798Mhz

    I would set 1.9 or 1.95 in the BIOS as well, to see if your board is just not giving them enough volts.

    I also see Act to Act delay in your memset image set to 3, did you set to 4 as well? If not I would try it with the first settings I gave, as 3 may be too tight for budget sticks. As well at Static tRead Value you have 8, did you test 10, same may apply here with budget sticks. They may not do very well at a low trd (Static tRead Value)

    Let me know how you get along, may just be crap ram? Did you ever run Memtest86+ on each stick one at a time at stock? If not, you should always do this on day one at stock speeds and timings to be sure you did not get a DOA stick >>>
    Memtest86+ - Advanced Memory Diagnostic Tool

    DOA happens with any brand, and can lead to this type of a headache.... So best to find out now
    Last edited by Lsdmeasap; 09-10-2008 at 12:51 PM.

  6. #6
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    Talking Re: GA-EP45-DS3R + Kingston PC6400 CL5

    It works!!!

    I can't actually believe it. I downgrade Bios to F9 and strangely, all Bios settings were reset to defaults, something that didn't happen when I upgraded from stock to F9.

    After that, I plugged in the settings from my screenshots with the suggestions in your last post, and it works.

    I've attached my configuration at the bottom in case there are others that were struggling.

    LSD, I really think that this forum and the work you're doing here is incredible. I can remember when the last time I had PC problems, my component suppliers had nothing like this in the way of support and I applaud you for helping and Gigabyte for giving this forum the go-ahead (and Tweaktown for hosting).

    Thank you so much!





  7. #7
    Lsdmeasap's Avatar
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    Nice!

    From that comment, sounds like you did not properly flash or load optimized defaults when you went from stock to F9 th first time around. Glad you got that fixed, it can cause many errors if you do not load and apply optimized defaults right after you flash

    Looks good, Only thing I would work on changing is this >>>

    tWTR..........................................4-6 May need a bit more, but what you have is a bit high, same for below tWR

    tWR............................................3-6


    Channel A
    Static tRead Value.........................:7-10 (You have 10, 7-8 will likely work and will be much faster)

    Glad I could help, and thanks for your kind words

  8. #8
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    Lsdmeasap:

    Since this thread seems to be very similar to my issue, I thought I would add on to it. I have recently built a new system, comprising of:

    Model Name : GA-MA790X-DS4
    M/B Rev : 1.0
    BIOS : F5c
    VGA : ATi Radeon X850
    CPU : AMD Phenom 9850 (default clock speed)
    Operation System : Vista 64-bit Ultimate SP1
    Memory : Kingston KHX6400D2K2/4G
    Memory Size : 8 gb
    Memory Speed : 800Mhz memory (slots 1, 2, 3, 4)
    Power Supply : Antec Neo 550 He PSU

    Even though this is their higher end HyperX which is supposed to run at 800Mhz with 5-5-5-15 timings, according to the RAM datasheet at Kingston, the SPD reports the speed as 667Mhz@5-5-5-15@1.80V.

    Obviously, when choosing Auto for everything in the Bios, the Motherboard uses the SPD of 667Mhz@5-5-5-15@1.80V. I would like to use it at 800Mhz with 5-5-5-15 timings (per the rating of this RAM), but have really had no luck getting it stable.

    I tried entering those settings manually in the Bios but the PC restarts a couple of times and resets everything back to default.

    If I change just the frequency to 800Mhz, the PC can post, although the Auto Timings result in 5-6-6-18.

    How do I get the 5-5-5-15 timings with 800MHz?

    Thank you in advance for your help.

  9. #9
    Lsdmeasap's Avatar
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    Default Re: GA-EP45-DS3R + Kingston PC6400 CL5

    Did you add/change the things I mentioned in my email to you? If so or not and you are still having issues can you please post me screenshots of your overclock page/s of your BIOS so I can better advise

    Thanks

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