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Thread: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues




  1. #1
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    Unhappy P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    Alright here's my situation. I've had the P35-DS3 for over an year now, and it's been a surprisingly good board overall, if a bit quirky at times. But the problems i am facing now are very very annoying.

    I was running 8GB of PQI DDR2-800 oc'ed to 1000MHz, FSB at 500, CPU at 3.5GHz. It was acting up from time to time and rebooted by itself every couple days, so i decided i deserve better. I sold the PQI and ordered two kits of Corsair XMS2 Twin2x4096-8500CS, which are rated to run at 1066MHz with 2.1v. I had 2GB of 1066 ram previously and knew my chip can do 3.73GHz stable, honestly i had my doubts that the board could do 533 FSB but it did.

    So i installed the Corsair kits, upped the clocks, set timings and voltages accordingly (5-5-5-15, 2.1v), tRFC is at 62 like my old PQIs, didn't touch any other subtimings. Ran memtest, everything fine.

    Booted into vista 64, crashed within minutes. Ran Orthos, no errors but again it bombed out after a couple mins. Went back to what was decently stable with my PQI memory, 500 FSB, 5-5-7-20, Write to Precharge set to 8, still crashes and crashes and crashes. Even sitting idle at the desktop and it crashes, actually it crashed twice while i was typing this (notepad ftw).

    When Orthos small FFTs didn't bomb out, it showed "Rounding was 0.5, expected less than 0.4". That's a MEMORY error, on the CPU TEST?!?!?!?! Also the windows based memtest errors like crazy.

    My theory - not enough NB voltage. Problem is, it's been at max for over half an year, since i first got 8GB RAM. But how can i pass all bootable benchmarks (did memtest86+ and the CPU benches on the Ultimate Boot CD for over three hours) but crash within minutes in Windows?

    I might be asking too much of the board, but the exact same settings were stable three days ago, and they had been stable for months. The CPU would even pass Linpack, and as far as the reboot every 2 days thing went, the PQIs would throw a couple errors on the 32-bit test in memtest86 so clearly they were to blaim.

    CPU Voltage is set to 1.4750v in BIOS, actual idle volts: 1.42v, load 1.37v. CPU is lapped and cooled by Scythe Mugen. Idle temps are 35C, Orthos load 55C, so i can't see temps being an issue either. More CPU voltage doesn't help, tried up to 1.5v. But dropping the NB voltage to +0.2 from +0.3 renders the whole thing unbootable.

    If it matters any, video card is Sapphire HD3870 DDR3 lightly oc'ed, it caused its fair share of trouble as well as it wouldn't even run at stock when i got it, but that's another discussion, and i fixed it a few months ago (more vdimm).

    Here's CPU-Z:

    Memset:


    And yes i do need all that RAM. I just bought it so don't make me sell it again.

    PS. I did try adjusting the performance level up to 16, didn't help either. So any way to give more juice to the NB please?
    Last edited by Th3_uN1Qu3; 03-28-2009 at 01:37 AM.

  2. #2
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    Set everything to stock/auto except volts. CPU gets back to 2.33GHz, RAM goes to 1066. IT WON'T EVEN BOOT WITH 8GB @ 1066 AT STOCK. 4GB works. 8GB of the crappiest RAM on earth used to work.

    Either i got fake Corsair RAM, or my mobo really hates me.

  3. #3
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    You need to post your bios settings, preferably using a bios template.

    What are your MCH, ICH, and CPU voltage settings.

    I'm surprised (and envious) of your cpu speed. I've only seen a couple of e6550 setups that barely exceed 3.5 GHz. Most setups easily run at 3.3 - 3.4+ GHz. I'm not willing to run high/maximum cpu and mobo volts to get high cpu speeds. My setup is real squirrelly above 500 MHz, probably because I won't run above 1.375 cpu volts.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  4. #4
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    Heh, want CPU-Z at 3.8GHz? :D

    MCH voltage is at the max allowed, +0.3v. I don't have ICH voltage as it's a P35. As for your CPU, i believe VTT (FSB Voltage) will help, you may not have to increase Vcore. And still, it's worth running above 1.375, especially with that cooler you have. Anyway, my load voltage is 1.376 so...

    I don't think the Corsair RAM will live enough for me to type all the settings so i'm posting a couple pics. What you see in the lower part first pic is that i set Advanced Timing Control to Auto hoping that my board would figure out stable settings by itself, but it didn't. In the second pic there are the manual settings.




    BTW, look what Corsair says.

    Quote Originally Posted by DerekT @ Corsair forum
    This memory is sold as a kit and tested as a kit. They might work in a four DRAM slot population, they might not. It not only depends on the memory but also the memory controller. There is NO guarantee for a 2 X two module kit population. For that guarantee you need to purchase a Quad kit.

    The Quad kits are higher binned modules that are tested as a four module Kit.

    There is NO guarantee of a four DRAM slot population unless you purchase a Quad kit.
    Now could he please explain how i was getting 1000MHz with four 2GB sticks of the cheapest RAM around, that were NOT marketed as dual channel?
    Last edited by Th3_uN1Qu3; 03-28-2009 at 07:04 PM.

  5. #5
    profJim's Avatar
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    Compatibility!!!
    Obviously your mobo and PQI did great.

    I've seen disclaimers on some memory manufactures' websites where they say using 4x2GB of memory is not guaranteed to run at the stated 1066 speed.

    In other threads dealing with more than 2x2GB of memory, our resident guru (LSDMEASAP) has recommended a starting value for tRFC = 72 or possibly a bit higher.

    If your bios allows selecting a 2.00D or 2.00B strap, give it a try. On my mobo, above 480 MHz, the "D" strap lets me set tRD (Static tRead Value or Performance Level) one step tighter (lower) than the "B" strap.

    It makes sense to start with the bios settings that worked so well with your PQI memory, but now it looks like you might have to loosen some of these timings a bit to find a stable setting.

    Maybe 2.2 volts will help, can you go higher than +0.3 in your bios?
    I assume that +0.3 volts is the max on your mobo for (G)MCH.
    You might have better results with 499 or 501 MHz, some mobos have issues at 400 or 500 MHz.

    To find your memory's limits, try running below 460 MHz and using a different memory multiplier.

    In our forum, some have had boot and/or stability issues when running 2x2GB of memory and using the recommended (G)MCH voltage of 1.20 volts or higher. When they set the (G)MCH voltage to 1.05 volts, their problems ended. As I recall, this was usually with G.Skill and OCZ memory modules.

    Thanks for the e6550 suggestions.
    I'm currently testing with 497 MHZ, vcore = 1.36250, cpu term = 1.34, and (G)MCH = 1.26 volts. Memory is set to 2.02 volts because Mushkin runs best in the low 2 volt range. These are my stable settings for 494 MHz. I've also tightened tRRD, tWTR,tWR, and tRTP. I had to loosen tRFC form 48 to 52. Memtest86+ has completed 30 passes on the test #5 loop and has completed 6 full passes so far. I've o/c'd up to 526 MHz and passed a single full Memtest (8 tests), but above 494 MHz, I fail Prime95, usually within 1 minute. In case you haven't guessed, Memtest86+ test #5 is my arch enemy.

    I don't have a need for higher speed, I just wanted to find my maximum performance level (with reasonable volts) without entering the flaky zone to get a few points higher.
    Last edited by profJim; 03-29-2009 at 10:47 AM.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  6. #6
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    I only have 2.00D not B, and i use that. I even tried 6-6-6-18, no luck. Tweaking subtimings or tRFC doesn't help either, i've done that a hundred times. And yes, +0.3v is the max on my mobo for MCH.

    And i did find my memory's limit, they only run well up to 900MHz. That's just FAIL on Corsair's side. I'm getting them replaced tomorrow, hopefully the replacement sets will run at their rated speed.

  7. #7
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    Wink I got the RAM replaced!

    I have gotten my replacement RAM today. It looks promising - the first serial number is incremental between the two modules of each kit, and the second serial number is THE SAME for all four sticks. The previous kits had their serial numbers all mixed up, none of them were the same. So that probably was a problem in Corsair's packing department...

    Anyway, i'll get back to you in an hour, i just swapped the video amplifier IC on my TV, as the old one blew yesterday. Things just break for me sometimes... But i got that TV for free so it's not that bad, anyway, it's working just fine now. But i'm hungry, so the computer will have to wait.

    Edit: Crashed at 1066 again... However, it passed Orthos + MemTest at the same time for 50 minutes at 1000MHz. So the new memory is fine, it just needs a little tweaking. ;)

    Today's been a great day. I fixed both my TV and my computer, now i can relax watching a movie. Cya tomorrow.
    Last edited by Th3_uN1Qu3; 04-03-2009 at 03:28 AM. Reason: Update

  8. #8
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    Default Re: P35-DS3, 8GB Corsair XMS2, E6550 OC - serious issues

    Alright, finished testing. With the new memory i'm currently stable at a FSB of 525, which makes the CPU 3.67GHz and the RAM 1050MHz. This is more than enough for my needs, although i couldn't hit the "magical" 1066 stable, i'm happy with the system as it is.
    Pro hardware technician for PC, Laptop and Sound equipment.

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