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Need help diagnosing 'two sticks of RAM BSOD' issue


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Hi guys.

 

My new PC:

 

Rig:

i7 2600K

ASUS P8Z68-V

2x4GB Corsair Vengeance 1866 MHz (Well, not quite...)

GTX 560Ti

Creative Audigy 2 ZS

Win7 64 bit

 

Cooling:

EK-Supreme HF

MCP655 Pump

Phobya Balancer 150 Silver Nickel Reservoir

Custom 2x120mm Radiator + Shroud

mCubed BigNG Fan Controller

 

 

The rig gear is completely new and everything works OK, apart from the RAM.

 

I cannot install two sticks of 4GB RAM without the computer crashing as soon as the logon screen appears, after the windows logo with the black background. I set my computer to load only the essential drivers and software (diagnostics mode in msconfig) and test my RAM as much as I could. I used memtest to test the RAM

 

I numbered each stick, 1 and 2. My findings are as follows:

 

Slot 1 with Stick 1, boots OK memtest passes 100%

Slot 3 with Stick 2, boots OK and memtest passes 100%

 

Slot 1 with Stick 1 and Slot 3 with Stick 2, BSOD at login screen

Slot 1 with Stick 2 and Slot 3 with Stick 1, BSOD at login screen

Slot 2 with Stick 1 and Slot 4 with Stick 2, BSOD at login screen

Slot 2 with Stick 2 and Slot 4 with Stick 1, BSOD at login screen

 

And finally to force dual channel mode off;

 

Slot 1 with Stick 1 and Slot 2 with Stick 2, BSOD at login screen

 

I literally have no idea what the problem is, since the RAM sticks work independantly of eachother! Is this a RAM issue? Mobo? CPU?

 

Any help is massively appreciated.

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Are you sure you have the correct timings/volts/speed set on the ram? Are you using xmp?

What happens if you run the ram at 1333mhz or 1600mhz instead of 1866mhz?

Also, are you using IDE or AHCI mode?

Edited by Celcius

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Are you sure you have the correct timings/volts/speed set on the ram? Are you using xmp?

What happens if you run the ram at 1333mhz or 1600mhz instead of 1866mhz?

Also, are you using IDE or AHCI mode?

 

Hi there. I have used the XMP profile and that did not work. I am in AHCI mode.

 

I tried running the MemOK! thing that Asus have crafted, it ran fine, set some timings and voltages for my RAM and said it was stable. It then proceeded to BSOD. I then slacked off every primary timing and set the speed to 1333MHz and it STILL BSOD'd. The timings were 10, 10, 10, 30, 2T and the voltage was set to 1.5V

 

This part is interesting though... I put both sticks of RAM in, set the BIOS to my standard OC profile (RAM set to 1925 MHz @ 1.5V, 9,10,9,27,2T) and then ran Windows Memory Diagnostic (the F8 bootup option) and the thing completed without a hitch... wtf?

 

I've also noticed that the system crashes at EXACTLY the same point every time. JUST when the login screen appears.

 

Maybe software related??

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What kind of drive is your OS installed on (hdd or ssd? what model?)

If using an ssd, have you updated it to the latest firmware?

Which sata port on the motherboard is your hdd/ssd connected to? If it's one of the marvell ports, try an intel port.

Edited by Celcius

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Firestorm, I'll get the BSOD error asap. Celcius, I have win7 64 on an OCZ vertex 3. I have not updated its firmware, I will do so now. The port the SSD is connected to is one of the 6 GB/s ports. There are only two of them on this mobo and they are being run from the Z68 chipset as far as I can gather. I dont have any SATA ports which are not run from this chipset, but I can try the 3GB/s port if you think thats worth doing? What are your thoughts on the SATA/SSD setup affecting the memory like this?

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It sounds like the ssd is the problem. Your ram passes memtest fine and changing it's settings hasn't fixed the problem.

OCZ's sandforce-based ssd's aren't known to be the most reliable, and you said that it BSODs when loading the OS, which is stored on the ssd.

You can try to update the firmware on the ssd and see if that fixes it, but it currently sounds like the ssd is the culprit to me.

Edited by Celcius

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It sounds like the ssd is the problem. Your ram passes memtest fine and changing it's settings hasn't fixed the problem.

OCZ's sandforce-based ssd's aren't known to be the most reliable, and you said that it BSODs when loading the OS, which is stored on the ssd.

You can try to update the firmware on the ssd and see if that fixes it, but it currently sounds like the ssd is the culprit to me.

 

Turns out I have the latest firmware already installed on the SSD. Thing is, if it were the SSD's doing, wouldn't I be getting errors irrespective of the number of RAM sticks I have in? The system is 100% stable if I have either/or RAM stick plugged in.

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Im going to create a bootable Win7 USB stick and see if that boots! And im going to run memtest, I will post the results back here.

 

Additional Comment:

 

OK, heres an update (and I apologise for the lenght of the reply, I just want to be accurate):

 

I tried installing W7 on a seperate hard drive which failed (BSOD). That rules out SSD and software problems. I ran memtest with both sticks in for 25 minuites and not one error came up. I know you are meant to run memtest for much longer than that, however, because of the solidarity of the BSODs (same time in the boot, every time. BSOD error is the same too: 0x0000007E) I am convinced such a glaring error would show up in memtest in no time.

 

At the time of running memtest with both sticks installed, I left my standard overclock profile settings in BIOS active. The memory clock was 963 MHz (which is DDR3 - 1927 MHz). This is from a 3 MHz increase in BCLK frequency. The ram sticks were running at 1.55V and using their XMPs.

 

My CPU standard overclock is 4852 MHz @ 1.456 - 1.472V (positive offset mode, 0.09V). Full load temps dont reach over 70 degrees. This problem has been occuring since the day I put the PC together and when I was testing the RAM in my original post, and all the tests in my first post were done at stock speeds and XMP settings.

 

Having both of them installed causes windows to BSOD like hell but they do not cause any errors whist being tested by memtest (whilst overclocked a bit) and completely pass windows mem diagnostic! What could cause this behaviour!?

 

I think software, power supply, and mass storage devices can be completely ruled out. I was having problems with my power supply - had to buy a new one because my first one was dodgy, it's possible this could all be related, heres a link to the power supply problems I was having:

 

http://forums.extrem...ad.php?t=359721

 

I don't think the two are related however, because the P/S problems started to occur AFTER the RAM problems. I'm beginning to think there's a fluke error in either the RAM, MOBO or CPU thats causing this really bizzare error! I might try disabling every single thing I can in BIOS, disconnecting every device bar the screen and trying again. Any more suggestions are very welcome.

Edited by dannybeckett

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Well now this i starting sound like something I have seem before....\

 

A buddy of mine got himself a 2600k om a UD7 with 4 sticks of OCZ 2GB 1600 cl6 ram.

Tha ram ran like champions but he had a lot of random bsod's and problems like what you are mentioning well only two of the four stick were being used there was no problem but with all 4 all hell broke loose. Eventually we took the sticks back to the shop and they did some trouble shooting tests, apparently ram that has not been optimized for sandy usage tends to cause problems because the OCZ sticks are rated to run @1.6v but the only way they could get all 4 sticks to run stable was to up the voltage to 1.9v ( :snap: kinda high imo ).

Needless to say he got a different set

 

But in your case I would recommend to manually set your speeds and timings in bios and not use XMP and then up the voltage until it's stable just to see if it is indeed the same kind of problem

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