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Thread: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?




  1. #1
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    Default Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    Hey guys.

    Not very often I make my own threads, as you know, I'm usually more of a helper/reader/absorber (thanks to everyone here who makes this forum worth its weight in gold!).

    Having recently upgraded my PC, I have been plagued with compatability problems since day 1.

    I'll try to explain the issue as best I can, and as simply as I can otherwise this might turn into War and Peace on my part.

    I got my system completely stable (or so I thought) at 4GHz with a 200 BCLK and a 20x multi (no issues with an even multi for me, must be lucky). The thing is, I can saving and exiting after setting the OC and the system is stable. When leaving the PC switched off for around 8 hours however, upon booting Windows, the PC now fails LinX either before the first calculation is complete or with non matching residual Norm values.

    This is most annoying as I was having to enter the BIOS, then immediately save and exit EVERY time I want to use the machine.

    I tried everything to get the thing to retain the working settings upon the next cold boot to no avail. Things I tried are:

    • Setting all sub timings manually
    • Taking a screen shot of CPU Tweaker and manually entering all the more complicated finer latencies
    • Locking down Round Trip Latency to known working values
    • Incrasing QPI/VTT between 1.1V and 1.41V with no success
    • Increasing VDIMM to between 1.66V and 1.76V (not comfortable going higher than that for 24/7)
    • Increasing VCore to max of 1.4500V (a bit more than the absolute max, but not too bad IMO, well under dangerous and never over 78c full LinX Load)
    • Giving up to 1.96V CPU PLL (a bit high but it was out of curiousity. Again the whole PC is very well cooled etc)
    • Revealing the Spread Spectrum option using the [CTRL] [F1] combo on the main BIOS screen.

    On a side note I was disapointed that Gigabyte hid the Spread Spectrum option. I thought they had stopped the poor practice of hiding options like this a long time ago.

    As you can see, no matter what I did, even increasing to 9-9-9-27 timings made zero difference. VERY frustrating indeed.

    A couple of days later I had the idea of trying a lower OC with a different RAM multiplier. Same issue. Using a multi of 6 I cot a few BSOD's. Not the usual suspects with regards to BSOD codes wither, and ones envolving win32.sys and NTFS.sys (definitely NOT a HDD problem, I ruled that out).

    I finally gave up and bought a set of Mushkin 996902. Upon installing them, setting the RAM multi to 10 with a 200 BCLK at 2000-DDR with the stock 7-10-8-27 timings and at a superb 1T/1N, my stability problems simply disappeared. I've concluded incompatibility because the sticks have been tested in two more systems and they're good. They even OC a little bit which is rare on Corsair Mainstream (IE non Dominator/Dominator GT).

    For the purposes of full info, here are all the exact markings on the sticks I have:

    Serial: 103405**
    Model: CMX4GX3M2A1600C7
    Discription: 1600MHz 4GB (2x2GB) 7-8-7-20 1.65V Ver7.1

    It may very well be that this particular version (7.1) has issues with the P55A UD4 or just that I was unlucky and had a set that was in fully working order, just with natural variation had some issues that were very subtle.

    I remain convinced it has something to do with a timing or latency that I don't have access to in the BIOS, sadly.

    I love Corsair and this is the first time EVER that I have had problems with any Gigabyte board not working well with Corsair RAM. Shame, as I really liked the asthetics of the sticks, theyre kind of retro looking and minimalistic.

    Please, if anyone has a working combination of this RAM and a P55A-UD4 can you check your serial number for me and the Version number? I would appreciate this greatly as I'm planning to build another Socket 1156 build soon and do have a source of this corsair RAM for a good price, a VERY good price.

    Chears guys and gals, I'd appreciate any feed back at all.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  2. #2
    Lsdmeasap's Avatar
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    They also hide Power on via USB too now in the power options

    Did you try less CPU PLL, sometimes I use 1.6-1.7.

    How about an ODD CPU multi, that may fix it right up.

    What main memory timings are you trying to use, just asked that to be sure you are not trying too tight of a tRCD with those IC's (PSC).

    What should help if nothing else does is to bump that tRCD one more, because normally with these the tRCD is +2 above CAS and I think the kits with rated timings only +1 above CAS can sometimes be a little bit quirky (And I really think they shouldn't have been spec'd that way)

  3. #3
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    I didn't try lower PLL than 1.8, however I have tried both 10-10-10-30 timings at 1600 DDR and also 9-9-9-27 at 1200 DDR, both were fine on saving and exiting the BIOS, but on leaving thge PC over night, it failed LinX on the first run after being powered on.

    Quite alot of board manufacturers have recently added fixes for these modules, for instance ASUS mentions them by name on their latest BIOS updates. The F14 UD4 BIOS also states "Enhanced RAM Compatibility".

    I'll try 7-10-8-26 when I get a chance with 1.7V PLL but I have a feeling that this board/BIOS still doesn't get on with these sticks.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  4. #4
    Acebmxer's Avatar
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    In regards to CPU PLL voltage some have said dropping down to 1.3 or what ever the lowest setting you have available has increased stability or got stable.. I thought this was limited to X58 not P55. I run 1.6 at 4.5ghz
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  5. #5
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    I'll definitely give it a go maybe at the weekend.

    The reason why I don't think it'll make much difference is because swapping out the RAM for a set of Mushkin 996902 has given complete stability, and has actually allowed me to OC further, now that I have no doubts as to whether it was the RAM or CPU/IMC causing issues.

    It also seems odd that it was stable until the system was left off for ~14 hours then failed LinX on the next cold boot. Since using the Mushkin RAM, the system is 100% solid no matter if it's from a cold boot or a warm boot.

    Anysthing's possible though so I guess I'll just have to try. I'll install the Corsair Friday evening, set it to 7-10-10-28, DDR-1600 or as close as (around 1528 ish) with a 21 multi and a 191 Bclk, 1.6-1.7 PLL then see what happens on Saturday morning.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  6. #6
    Acebmxer's Avatar
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    Yeah I think your right about the compatibility with the memory. How ever it is a very strange problem that you would not think it being a compatibility issue.

    as for the CPU PLL I personally dont see any difference running CPU Pll under 1.8..
    Main Rig
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    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
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  7. #7
    Lsdmeasap's Avatar
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    You said Mushkin fixed it, didn't that help you decide anything? HAHA, J/K but not really :)

    Try 7-9-7-x instead, at 1600Mhz

  8. #8
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    It definitely decided something for me... don't buy RAM that's binned tighter than a nun's chuff and has about as much head room as an 8ft guy driving a Mini.

    On a brighter note the Mushkin is currently running at DDR-2060 at 7-9-7-20 and tighter sub timings all round. The Corsair sticks don't even boot beyond DDR-1610 (5mhz overclock in real terms)...
    Last edited by Psycho101; 10-13-2010 at 07:13 AM.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  9. #9
    Acebmxer's Avatar
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    Quote Originally Posted by Psycho101 View Post
    It definitely decided something for me... don't buy RAM that's binned tighter than a nun's chuff and has about as much head room as an 8ft guy driving a Mini.
    I like that

    Glad to hear you like the new ram.
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  10. #10
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    Default Re: Incompatability: Corsair XMS3 CMX4GX3M2A1600C7 and P55A UD4?

    Quote Originally Posted by Psycho101 View Post
    On a brighter note the Mushkin is currently running at DDR-2060 at 7-9-7-20 and tighter sub timings all round. The Corsair sticks don't even boot beyond DDR-1610 (5mhz overclock in real terms)...
    You know what I see in that comment

    Mushkin's just rock man, nothing but the best!

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