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Thread: G.Skill memory for EP45-UD3P




  1. #21
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    Default Re: G.Skill memory for EP45-UD3P

    Quote Originally Posted by MarktheC View Post
    On my UD3R, I can boot and memtest86+ and Prime95 with 2.66C, but can't even POST with 2.66D...
    What setting are you using for FSB? I never did test the A and the C straps. I tried both just now with FSB at 400+ and memtest just spits out hundreds of errors. The "B" strap seems to work for me but the machine sometimes won't start after exiting the BIOS, just shuts down totally. And sometimes when getting into the BIOS it gives that warning message that some of the settings shown may not be what is actually being used. And sometimes when exiting memtest the machine will reboot a couple of times, and sometimes just turn itself off. Also the machine will reboot a couple of times when all I've done is increase MCH voltage by .02v. So I'm a bit suspicious of using the B strap above 400 FSB and I don't really trust it. But it is the only one that has given me no errors in memtest after 15 passes with memory at 1066. I've only run one test with it so far, I've been concentraing on using "D", the supposedly correct one for 400+, and the one that does not cause all those spurious reboots and shutdowns. (I know it's normal for the machine to reboot a couple of times after changing settings, but what's happening when I use "B" is not normal).

    Can anyone else comment on the use of "B" for FSB 400+. Is it something that shouldn't be done. I've read about it somewhere but during my countless hours of research I can't remember where.

    Update: Here is some info on it: http://forums.tweaktown.com/f58/2-00...arision-31656/

    I've also been posting over at the g.skill forums too. First bit of advice I got there was to increase MCH voltage to 1.4v. I'm happy to take the advice from the g.skill techs but doesn't that seem a bit high, I only have 2x2GB. I don't want to damage the board.
    Last edited by dclayw; 05-07-2009 at 08:57 PM.
    (1) Gigabyte 3DAurora chassis - Gigabyte Ex38-DS4 - Xeon 3110 - Zalman CNPS9500 LED - 2x1GB PC2 8500 Crucial Ballistix Tracer 2.0v (BL12864AL106A) - ThermalTake Cyclo RAM cooler - 2xMSI Radeon HD4670 - Corsair HX 620W - WD 36GB Raptor - Seagate 250GB (ST3250310AS) - Asus DRW 2014LIT - XP Pro SP3 (32bit)
    (2) NZXT Apollo chassis - Gigabyte EP45-UD3P - E8400 - Xigmatek S1283 Red Scorpion - 2x2GB PC2 8800 G.Skill 1.9v (F2-8800CL5D-4GBPI) - Gigabyte GeForce 9600GT - Corsair HX 520W - Seagate 250GB (ST3250318AS) - LG DRW GH22NP20 - XP Pro SP3 (32bit)

  2. #22
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    Default Re: G.Skill memory for EP45-UD3P

    Quote Originally Posted by grishkafool View Post
    I think I remember Lsdmeasap saying something about Bstrap wanting more volts than D...?
    It may or may not have been in this thread, I don't remember.
    I remember reading about it somewhere too but can't find any info on it, I don't think it was in that thread.
    (1) Gigabyte 3DAurora chassis - Gigabyte Ex38-DS4 - Xeon 3110 - Zalman CNPS9500 LED - 2x1GB PC2 8500 Crucial Ballistix Tracer 2.0v (BL12864AL106A) - ThermalTake Cyclo RAM cooler - 2xMSI Radeon HD4670 - Corsair HX 620W - WD 36GB Raptor - Seagate 250GB (ST3250310AS) - Asus DRW 2014LIT - XP Pro SP3 (32bit)
    (2) NZXT Apollo chassis - Gigabyte EP45-UD3P - E8400 - Xigmatek S1283 Red Scorpion - 2x2GB PC2 8800 G.Skill 1.9v (F2-8800CL5D-4GBPI) - Gigabyte GeForce 9600GT - Corsair HX 520W - Seagate 250GB (ST3250318AS) - LG DRW GH22NP20 - XP Pro SP3 (32bit)

  3. #23
    kick's Avatar
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    Default Re: G.Skill memory for EP45-UD3P

    Yeh i meant to link u lsds strap comparison.
    I found the best results on 2:00B(333mhz) early on i mean in terms of cpu overclocking D just didnt seem to work so well from 400-500 cpu/fsb ref speed.
    As i said tho im now on a D for increased bandwidth with less voltage (lower tRD).
    You already know the board and the cpu..If id just bought some 1100 mhz memory id be tryin to get it to work at 1100 or very close to it because its supposed to :0.
    So assume you cant get it on a 2 multiplier (550 fsb)tho maybe that is possible with a dual and hi voltage.
    leaves you with the 2.40 B (333) or 2.66 D (400).
    Perhaps cpu with a multiplier that has it running under 3.5 ghz just to see first?
    2.40 B would get you a higher base fsb ,higher fsb= better bandwidth,if the memory timings dont change.

    Some memory doesnt run happily below its rated speed (so ive read) but you should have some advantage with 1100 mhz tested memory.
    Perhaps you can run it on 4-4-4-12 timings or 4-*-*-* on a 2 multiplier to above 460 fsb?
    Last edited by kick; 05-08-2009 at 05:57 AM.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

  4. #24
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    Default Re: G.Skill memory for EP45-UD3P

    I did try running the memory at 1100, no change in results. I guess I'm sticking with 1066 as that works out nice and even with FSB 400 and 2.66D, no other reason. I'm perfectly happy with 400 FSB and only want the e8400 at 3.6GHz (400*9). I can always push it harder later, just want a reasonably fast stable machine for now.

    Actually I'm testing memory right now so I have the e8400 running with only 6 multi atm. I'm currently just on 2 hours with Prime95 blend tests with 2.40B strap (FSB 444). If that proves stable then I'll be happy with that and move onto the CPU. I need to check but I think tRD defaulted to 13 (I had it on auto) with 5 5 5 15 and 2.40B strap. I'll see if I can get it lower then that.

    I haven't tried 550 FSB as I prefer to keep things cool, but when I get time I'll give it a go. From my research it seems that higher CPU multi is preferable to higher FSB, lots of debates around on that though.

    This all came about because with the board pretty much at auto for everything Prime95 fell over with what indicated memory to me. So I started testing memory and found I just cannot get D strap to run stable. I don't know if it's the board or the memory, I could try other memory, but I'll be happy if I'm stable with B strap. The settings I have now are MCH voltage of 1.24v and FSB voltage (CPU Termination) of 1.22v. They work with B, but not D.
    (1) Gigabyte 3DAurora chassis - Gigabyte Ex38-DS4 - Xeon 3110 - Zalman CNPS9500 LED - 2x1GB PC2 8500 Crucial Ballistix Tracer 2.0v (BL12864AL106A) - ThermalTake Cyclo RAM cooler - 2xMSI Radeon HD4670 - Corsair HX 620W - WD 36GB Raptor - Seagate 250GB (ST3250310AS) - Asus DRW 2014LIT - XP Pro SP3 (32bit)
    (2) NZXT Apollo chassis - Gigabyte EP45-UD3P - E8400 - Xigmatek S1283 Red Scorpion - 2x2GB PC2 8800 G.Skill 1.9v (F2-8800CL5D-4GBPI) - Gigabyte GeForce 9600GT - Corsair HX 520W - Seagate 250GB (ST3250318AS) - LG DRW GH22NP20 - XP Pro SP3 (32bit)

  5. #25
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    Default Re: G.Skill memory for EP45-UD3P

    Quote Originally Posted by dclayw View Post
    What setting are you using for FSB?
    E8400 @ 333 MHz x9.

    I must be rare, because I'm NOT trying to OC my PC, I just want to learn as much as I can so I can manually configure my G.Skill PC7200 to run @ spec. If I had known it would be so hard, I would have bought RAM that was certified by Gigabyte for my mobo. I have the RAM @ 444 Mhz now Prime95 10 hours, Everest read ~7400 MB/s so I'll stop at that point.

  6. #26
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    Default Re: G.Skill memory for EP45-UD3P

    Oh yeh higher cpu speed the best,within reason,tho, highest fsb with highest cpu speed as long as you dont have to gimp the memory timings too much is the general plan .
    Me< a lower multiplier isnt really an option. 6 or 7 are the only choices and 6 doesnt cut it.
    for a 10mhz(20mhz mem) fsb speed diff my memory is working better at a lower voltage,sure the cpu loses 70 mhz but I feel the total performance is about the same.kinda like the "Prof Jimi Hendrix experience"
    http://forums.tweaktown.com/members/profjim/
    Last edited by kick; 05-09-2009 at 04:57 AM.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

  7. #27
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    Default Re: G.Skill memory for EP45-UD3P

    1.4 MCH Voltage is not suggested at all, and yes that is very high for sure!

    P45 is a tricky beast, sometimes when you would expect more MCH to be needed less is the answer, the amount needed also directly depends on the amount of Vtt applied, MCH Ref and tRD in use

    You can use B @ 400+ FSB, it is just harder to do depending on the ram you have, and of course some ram will not do it at all

    I did do a simple strap comparison, but of course that does not show all that is possible with higher speeds or higher multi's on the straps. >>
    http://forums.tweaktown.com/f58/2-00...arision-31656/

    May or may not be the thread you was thinking of?

  8. #28
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    Default Re: G.Skill memory for EP45-UD3P

    Well, I'm getting pretty frustrated. I only wanted 3.6Ghz but it was pretty easy to push it to 3.8Ghz so that's what I'm running now. I need to post all my settings to get some feedback. Will do that when I get a bit more time. Thanks for being patient.

    This is what I have done with current settings. I ran 13.5 hours Prime95 with small ffts with no errors. I also ran 15 passes of InteBurnTest (several times) and that passed too. This indcates the cpu is stable. With all my memory testing I was just testing with test 6 in memtest86+ as that was the only test giving errors, and it takes so long to run the tests. Maybe running just test 6 was not such a good idea. I let it run overnight (about 50 passes on test 6), no errors. I had previously run 5 hours of Prime95 blend tests and that was stable too. As a final check I ran memtest86+ (all tests) and it gets errors in the 1st or 2nd pass, it's not a one off, I've ran it a few times. I'm currently 9 hours into Prime95 blend with no problems. But I'll post all my settings tomorrow and would appreciate any feedback on what you guys think might be wrong.

    So that's where I'm at. There is obviously some small issue somehere but I can't find it. Maybe the memory is a bit dodgy, maybe I need to tweak some timings, maybe memtest86+ is telling me lies, (I don't think memtest86+ ever lies does it). All my timings are pretty lose by the way. I'm running 5 5 5 15 at 1.9v (spec) and tRD set at AUTO gets 13 and tRFC at AUTO gets 70.

    A couple of quick questions. What is the actual value for CPU vcore. Is the value shown in CPU-Z accurate? I curerntly have it set to 1.29375v in the BIOS. After reboot PC Health shows 1.284v and CPU-Z shows 1.232-1.248v. I think these values sound reasonable for a E0 E8400 running at 3.78Ghz (445*8.5). Do you think so?

    This is only my second build and the approach I've been taking is to get the memory subsystem (RAM and NB etc.) stable and once that is OK then move onto overclocking the CPU. When getting memory stable you generally have to increase MCH and FSB voltages a bit to find the sweet spot (for fast memory speeds anyway). Once that is all done and you move onto the CPU is it then only necessary to tweak CPU vcore. cpu clock and maybe the reference voltages, do you ever need to go back an tweak MCH and FSB voltages again?
    (1) Gigabyte 3DAurora chassis - Gigabyte Ex38-DS4 - Xeon 3110 - Zalman CNPS9500 LED - 2x1GB PC2 8500 Crucial Ballistix Tracer 2.0v (BL12864AL106A) - ThermalTake Cyclo RAM cooler - 2xMSI Radeon HD4670 - Corsair HX 620W - WD 36GB Raptor - Seagate 250GB (ST3250310AS) - Asus DRW 2014LIT - XP Pro SP3 (32bit)
    (2) NZXT Apollo chassis - Gigabyte EP45-UD3P - E8400 - Xigmatek S1283 Red Scorpion - 2x2GB PC2 8800 G.Skill 1.9v (F2-8800CL5D-4GBPI) - Gigabyte GeForce 9600GT - Corsair HX 520W - Seagate 250GB (ST3250318AS) - LG DRW GH22NP20 - XP Pro SP3 (32bit)

  9. #29
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    Default Re: G.Skill memory for EP45-UD3P

    I believe the cpu core voltage shown by cpu-z is accurate it also agrees with speedfan and cpuid hw monitor etc.

    For me the vdiff (vdroop or whatever) is approx .025-.03v with LLC enabled while under load.
    For memory the voltage drop is approximately the same .ie i have 2.08v set in bios ,when running under load this drops to 2.05.
    If the board is set to run auto ie standard ddr2 memory v it inputs 1.82+ in bios.
    My other Gigabyte board which has no memory voltage adjustment gives the memory 1.84v in bios.
    I assume this is some kind of mbrd designer "lets give it a little bit over to compensate for voltage drop/variations" thing.

    I havent noticed setting different ref settings or vTT making much difference,(those that work anyway).
    Some of this may be due to different psu's but most people get it as far as I know.

    At v high(above 1.4v)cpu settings the voltage while running gets closer to what is set in bios.Im not sure what causes that.

    OCCT running with a monitoring suite such as speedfan or everest gives nice graph readouts of all the voltages over the course of its test run . If the test fails you can see at exactly what temp or voltage the different components were, at the point of failure.

    on your last point,I had a 500fsb set up withmost of the ref settings done manually on, a B multiplier(mem voltage was v high tho).
    Now im on 490fsb on D and I still havent everything set.It is stable but with a lot of auto settings,ill get there .
    Last edited by kick; 05-09-2009 at 05:40 PM.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

  10. #30
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    Default Re: G.Skill memory for EP45-UD3P

    Quote Originally Posted by kick View Post
    At v high(above 1.4v)cpu settings the voltage while running gets closer to what is set in bios.Im not sure what causes that.
    I found that out. When I was moving to around 3.8Ghz I thought I would set vcore on auto to see what it needed. CPU-Z showed 1.424v!! Silly thing to do in hindsight, I quicky shut down and changed it, BIOS health reading was giving 1.428v.
    (1) Gigabyte 3DAurora chassis - Gigabyte Ex38-DS4 - Xeon 3110 - Zalman CNPS9500 LED - 2x1GB PC2 8500 Crucial Ballistix Tracer 2.0v (BL12864AL106A) - ThermalTake Cyclo RAM cooler - 2xMSI Radeon HD4670 - Corsair HX 620W - WD 36GB Raptor - Seagate 250GB (ST3250310AS) - Asus DRW 2014LIT - XP Pro SP3 (32bit)
    (2) NZXT Apollo chassis - Gigabyte EP45-UD3P - E8400 - Xigmatek S1283 Red Scorpion - 2x2GB PC2 8800 G.Skill 1.9v (F2-8800CL5D-4GBPI) - Gigabyte GeForce 9600GT - Corsair HX 520W - Seagate 250GB (ST3250318AS) - LG DRW GH22NP20 - XP Pro SP3 (32bit)

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