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Thread: Memory / video problem on GA-EG45M-DS2H




  1. #41
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    My Corsair Dominator is rated at 5-5-5-18 at 1.8V for 800Mhz and 5-5-5-15 at 2.1V for 1066MHz.

    I found that, at 800MHz, it will work at 4-4-4-12 at 2.0V, I tried to push for 3-4-4-12 but it won't work.

    When I overclocked my CPU to 4.0GHz (400 x 10), I left the GMCH latch and DRAM multiplier settings both at Auto, and it automatically selected 2.40B, giving a 960MHz DRAM. I found that I can run at 5-4-4-12 at 2.1V, and MCH voltage had to be increased to 1.3V.

    How about trying to increase the the MCH Voltage from 1.2V to 1.3V, maybe it will help. Like I said, the G45 is one stubborn nut... :p

  2. #42
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Let us know how you get along with this info, if you are still stuck please post exactly what settings you are trying

  3. #43
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    The thing is, even timing 55518 won't work with 2.0V if manual is selected. With exactly the same settings for multi and MCH strap 2.00B and 333MHz.

    Odd thing is that it works when auto is selected. I thought auto gives the default values indicated in the bios ... So I tried to copy the exact same values and only afterwards to increase the settings.

    By the Way, in auto I reached now 382*8.5 = 3.25GHz

    But I didn't go up to the max, I try to install the rest at the same time.

    CHeers,

    Frédéric.

  4. #44
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    What you see in the BIOS for Auto is not always used for sure so do not go by that. Here you can see what Auto for timings gives you with this >>
    http://www.tweakers.fr/memset.html

    Then set manually, but be sure you set Static tRead Value high enough, like 6 maybe 7 depending on your ram, 8 if you want to be sure

    Also, do see here for differences of what you will see in Memset Vs what you want to set in the BIOS >>
    http://forums.tweaktown.com/f69/memo...vs-bios-27283/

  5. #45
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    I attempted again to run faster DRAM clock, below is the result and settings, unfortunately, still no change I am still stuck with 2.50A multiplier giving me just 833MHz DRAM.

    This time I was more careful, I set the timings manually:
    Performance Enhance: Standard
    DRAM basic timings: 5-5-5-15
    Advanced Timings:
    tRRD: 3
    tWTR: 3
    tWR: 6
    tRFC: 52
    tRTP: 3
    Command Rate: 2
    Below items were set identical for both Channels A and B:
    Static tRead: 7
    tRD Phase adjustments: all at Auto
    Trd2rd: 6
    Twr2wr: 6
    Twr2rd: 5
    Trd2wr: 8
    Driving strength profile: 1066MHz
    MCH Core: 1.3V
    DRAM: 2.1V (2.2V for 1111MHz)

    2.66C 889MHz
    Still cannot even reach POST screen

    3.00A 1000MHz
    As above, cannot reach POST, worse still it beeped with something like 8-12 beeps, I did not bother to count.

    3.33C 1111MHz
    Surprisingly, this one actually POSTed! I got into the BIOS and MIT screen showed the 1111MHz DRAM without showing the red error box first. And upon continued boot up, I could see the Microsoft Windows start-up little horizontal bar (at 640x480 resolution), but once it gets to the native resolution of 1920x1080, screen went absolute black, no mouse cursor but hard disk is grinding like normal Windows start-up for the first few minutes, then the hard disk activity slowed down. Mouse cursor appeared after a few minutes but frozen in the middle of the black screen. Basically nothing worked.

    Well, nothing worked with manual settings, I am back to 2.50A 833MHz, running 4-4-4-12 at Extreme settings for Performance Enhance, with static tRead at 7. I am surprised that 1111MHz can POST and yet it won't POST at a mere 889MHz, let alone 1000MHz...

    Oh well... guess I have to live with 833MHz 4-4-4-12 for now. SiSandra reported just a marginal memory bandwidth improvement over 800MHz as 833MHz is 4% above 800MHz.
    Last edited by LCP; 12-08-2008 at 05:08 PM.

  6. #46
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Try this with standard >>>

    555-18

    tRRD: 5
    tWTR: 8
    tWR: 12
    tRFC: 68
    tRTP: 4
    Command Rate: 2
    Below items were set identical for both Channels A and B:
    Static tRead: 10
    tRD Phase adjustments: all at Auto
    Trd2rd: 6 << all at Auto
    Twr2wr: 6 << all at Auto
    Twr2rd: 5 << all at Auto
    Trd2wr: 8 << all at Auto
    Driving strength profile: 1066MHz or 1200
    MCH Core: 1.3V
    DRAM: 2.1V (2.2V for 1111MHz)

    Try this with 333+ FSB using B or D ram multi's and you should get close or more then 1066. Those are loose enough that you should for sure be able to post if you are using enough Vtt and Vcore

    If not, please post your full exact settings you are now using and I will advise about going forward to get 1066+

  7. #47
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Using B (333) or D (400) RAM multipliers? Errr, remember, they have idiot-proofed the BIOS so there's none on this G45 board (for B and D) that can actually cause the RAM to go above 800MHz at 333MHz bus. The only multiplier choices that I have to get the RAM above 800MHz are:

    2.50A 833MHz --> Running on this now
    2.66C 889MHz --> No POST
    3.00A 1000MHz --> No POST
    3.33C 1111MHz --> POSTed, Vista loaded, but only black screen with frozen mouse
    4.00C 1333MHz --> This one is out of question

    Will try the super loose timings when I get near my HTPC again this weekend... the 1111MHz looks a little bit more promising, but for all you may know, it could be that the onboard VGA in the G45 GMCH is the limiting factor.

    Also, from what I noticed against the P45 boards, this G45 board only have the following items for voltage settings in the BIOS, very limited:

    CPU
    CPU Vcore
    CPU Termination
    CPU Reference

    MCH/ICH
    MCH Core

    DRAM
    DRAM Voltage

  8. #48
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Ya, maybe that 3.33C needed more volts or something along those lines since you almos had it

    What MCH was you using? And vcore/Vtt?

  9. #49
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Was using 1.30V for MCH, I don't feel comfortable going to the next setting which is 1.40V and listed in red in the BIOS. But I have tried the 1.40V setting before once, with the same result.

    CPU Vcore was at 1.200V for the 3.33C attempt. I am running at a very cool 1.09375V currently for 800/833 DRAM. Vtt was at Auto (1.20V).

    As can been seen, the MCH and DRAM voltage types and settings are a bit limited and less flexible in this BIOS when compared to the P45/X48 boards. Perhaps they really intend this board to be used in HTPCs only, but then it was also advertised as supporting 1600MHz FSB (which works) and 1066MHz DDR2 (hmmm?)...

    Will continue trying this weekend.

  10. #50
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    Default Re: Memory / video problem on GA-EG45M-DS2H

    Tried the loose settings over the weekend, sad to say it didn't work, still the same, this time I bumped the CPU Vcore to 1.25V and also raised the Vtt to 1.30V.

    Exactly the same results with CPU at 333MHz x 10:

    2.66C 889MHz --> No POST
    3.00A 1000MHz --> No POST
    3.33C 1111MHz --> POSTed, Vista loaded, but only black screen with frozen mouse

    Well, I think the onboard video of the G45 GMCH has something to do with the board not able to use funny GMCH latches. And I am back to 2.50A 833MHz.

    Later I experimented with 400MHz x 10 for my CPU, and as before (a month ago) it booted and ran well with the GMCH Latch set to auto (which resulted in 2.40B multiplier or 960MHz DRAM).

    Here's a shot of CPU-Z running with the CPU at 4GHz, at full load with Vcore set to 1.3000V:


    Then, I used my regular 2.50A multiplier with the 400MHz x 10, and it booted and ran, DRAM is now 1000MHz, after some tweaking here and there, the system is stable with these settings:

    5-5-5-15
    Performance Enhance: Extreme
    Static tRead: 7
    Command Rate: 2
    Driving Strength: 1066
    All other Advanced Timing Controls are at Auto

    CPU Vcore: 1.3250V
    CPU Termination: Auto (1.200V)
    CPU Reference: Auto (0.820V)

    MCH Core: 1.30V

    DRAM Voltage: 2.10V

    Here's the Memset 3.6 screen:

    I think the memory timings are pretty tight already at the above settings running at DDR2-1000, which means my DRAM are probably okay (no memory errors), it is definitely the G45 onboard video that is preventing outright overclocking without first having to overclock the CPU Host clock.

    For comparison, when I was doing 333x10, at 2.50A 833MHz DRAM, this was my Memset screen (which is also exactly the same as when I was doing 2.40B 800MHz DRAM except for a slight difference in Refresh Period) (this was taken earlier with Memset 3.5.9 beta):

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