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Thread: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB




  1. #1
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    Default GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Hello. I am posting this in the motherboard forum because I suspect that is where my problem lies. However, as you will soon see, this is a VERY strange problem and if you feel that it belongs elsewhere, please let me know.

    My newly built system boots and runs just fine (e.g. I can play games like Dragon Age for hours) with 1 2GB RAM module installed, but when I install the second 2GB module, my system locks up completely approximately 30s to 2m after I get to the Windows login screen, whether or not I log in. The time it takes for this to happen is variable within a short window of time, but it ALWAYS happens. There is no blue screen or error message in the event log other than the Kernel Power error from the required hard reset, the whole system just locks up completely. Even Windows setup locks up this way after approximately a minute. However, I am able to boot into Safe Mode and run that way for an indefinite amount of time without any lock-ups.

    My system:
    Antec EarthWatts 650W
    Gigabyte P55M-UD2 Rev 1.0
    4GB Corsair DDR3-1333 RAM
    Intel Core i5 750
    Radeon 4850
    64-bit Windows 7 Ultimate

    Everything is being run at stock speeds and timings. I have not done any tweaking.

    Troubleshooting Steps Taken So Far:
    Verified that the memory modules and their speeds and timings show-up correctly in the BIOS status screens.

    Ran several passes of MemTest86+ with 4GB RAM installed. All tests passed.

    Tried multiple sets of 2 x 2GB RAM modules. All show same behavior: stable with 2GB, lock-up with 4GB.

    Tried memory in both dual-channel (slots 1 and 3 on my mobo) and single channel (slots 1 and 2) configurations.

    Upgraded my BIOS with QFlash (NOT @BIOS) to both the F5 and F7c versions. Same behavior.

    Tried disabling most of the on-board mobo features in the BIOS (like Audio, Firewire, USB, etc) to narrow down the problem, but it had no effect.

    Tested all of my connections on the motherboard.


    One thing that I have NOT been able to do is get my hands on a 4GB RAM module, so I don't know if this is a problem with the AMOUNT of memory or the number of modules. I suspect that it's the latter, but I can't be sure of that.

    At first, I thought this was a driver issue since I am stable in Safe Mode but not in setup or normal mode, and that may be the case. However, it cannot be related to a driver I installed since Windows setup from a DVD-ROM encounters the same issue. Also, I have NEVER heard of drivers behaving differently based on how much RAM or how many RAM modules are installed. The fact that it locks up consistently after Windows boots without giving any sort of error messages in the Event Logs or without a BSOD makes me skeptical of some sort of driver issue.

    What could possibly be causing instability with 4GB of RAM that would then allow stable operation with 2GB? I am totally stumped. Anyone have any suggestions?

  2. #2
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    try setting ram voltage manually to its spec and manually set timings to spec in bios,set cpu voltage to normal setting,and set qpi voltage to 1.25000 also set system performance enhance to standard,its probably voltages are on auto that its crashing esp qpi voltage
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
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  3. #3
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Quote Originally Posted by wazza300 View Post
    try setting ram voltage manually to its spec and manually set timings to spec in bios,set cpu voltage to normal setting,and set qpi voltage to 1.25000 also set system performance enhance to standard,its probably voltages are on auto that its crashing esp qpi voltage


    Thank you! I set the QPI voltage to 1.25, up from its initial 1.1 setting, manually set my memory voltage to the 1.5 spec (even though that's where it was on Auto), and set Performance Enhance to standard. I left the CPU voltage and memory timings alone for now since they appear to be correct on their default settings.

    I've been running for 15 minutes now without a system lock-up. Since I was locking up within 2 minutes EVERY time before, this is a big improvement and I think I'm on the right track now at the very least.

    I'm going to stress test my system a bit and I'll post the results here.

    Thanks again for your help!
    Last edited by sqrmap; 01-24-2010 at 05:02 PM.

  4. #4
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    I just did some gaming for several hours. My system was completely stable for the entire time. Looks like I have my fix. Many thanks.

  5. #5
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Quote Originally Posted by sqrmap View Post
    I just did some gaming for several hours. My system was completely stable for the entire time. Looks like I have my fix. Many thanks.
    why cant you use normal setting for cpu voltage?if you keep c1e and eist enabled,or just disable c1e and click on balanced profile power saving in windows 7 it will do the same job as c1e,throttle cpu when idle and full power under load this will lower temps alot
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  6. #6
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    I am having the same problem after recently upgrading to 8GB RAM (from 4GB.) I'd like to try changing my timings and voltages, but what does it mean to "set to spec"? What is "spec" and where do I find it?

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Spec means specifications for your memory kit. They would be on the site you purchased from, the site for the model of the memory, and usually also on a sticker on the side of your memory.

    Depending on the timings and voltages, you may need to increase either or both of those to use two kits, as the specs are per kit.

  8. #8
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Quote Originally Posted by Bizily View Post
    I am having the same problem after recently upgrading to 8GB RAM (from 4GB.) I'd like to try changing my timings and voltages, but what does it mean to "set to spec"? What is "spec" and where do I find it?
    Spec means set the ram speed/timings/voltage to what's printed on the box or the ram itself,post your ram model and current cpu,dram and qpi/vtt voltages
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  9. #9
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Quote Originally Posted by wazza300 View Post
    Spec means set the ram speed/timings/voltage to what's printed on the box or the ram itself,post your ram model and current cpu,dram and qpi/vtt voltages
    I have two identical 4GB kits for a total of 8GB. I scoured the labels and I don't see any timings or voltages printed anywhere. I also went to the Crucial website and did not find anything on timing or voltages for this kit.

    Crucial CT2KIT25664BA1339
    Intel Core i5 750 @ 2.67GHz
    Windows 7 Ultimate 64-bit

    All voltages and timings are set to "Auto". For voltages, the BIOS does not state what value this represents.

    For timings, the "Auto" settings are as follows.
    tCL: 9
    tRCD: 9
    tRP: 9
    tRAS: 24
    tRFC: 74
    tWR: 10
    tWTR: 5
    tRRD: 4
    tRTP: 5
    tFAW: 20
    CHA RTL: 46
    CHB RTL: 48
    tWL: 7
    RttNom: 60
    RttWr: Disabled
    PD Exit Mode: Slow
    B2B CAS Delay: Disabled
    Command Rate: Auto
    Last edited by Bizily; 03-13-2011 at 08:47 PM.

  10. #10
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    Default Re: GA-P55M-UD2: 64-bit Win 7 stable with 2GB RAM, crashes with 4GB

    Is this the kit you have?

    Newegg.com - Crucial 4GB &#40;2 x 2GB&#41; 240-Pin DDR3 SDRAM DDR3 1333 &#40;PC3 10600&#41; Dual Channel Kit Desktop Memory Model CT2KIT25664BA1339

    Timings of 9.9.9.24 are correct,what you need to do now is manually set the dram voltage to 1.5v and find and set qpi/vtt voltage to 1.25v and see if it improves
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

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