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Windows 7: Frequent BSODs on new PC -- ntoskrnl.exe

14 Jul 2010   #11
CarlTR6

Windows 7 Ultimate 32 bit
 
 

You are very welcome. I am going to sign off for the night. Post any questions oand any results. If I am not here, one of the other BSOD team members will jump in for me.


My System SpecsSystem Spec
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20 Jul 2010   #12
ashground

Windows 7 x94 Professional
 
 

I've been out of town for the last few days, but I finally got a chance to take another look at the computer. The crashes are getting much worse as time goes on -- now it's crashing at least once an hour. I took a look at the older drivers and updated or uninstalled what I could to no effect. However, I ran memtest this evening, and though I only had time to do a single pass for now, that pass came up with 14 errors.

I'm assuming that means that that's where my problems lie. So, is it straight to the manufacturer, or are there other tests I should be doing to make sure that's the problem? For instance, is there a chance this is happening due to overheating? My case is reporting 37c - 47c, so I doubt that's the issue, but I'd like to know exactly what I'm dealing with.

Also, is there any way to save out error reports from memtest? I couldn't seem to find a way.
My System SpecsSystem Spec
20 Jul 2010   #13
ashground

Windows 7 x94 Professional
 
 

I left memtest running overnight, and it locked up before it even finished a single pass -- it said it had been running for two hours, and in that time it had 10 errors. Does this really, really mean my RAM is fried?
My System SpecsSystem Spec
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20 Jul 2010   #14
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by ashground View Post
I left memtest running overnight, and it locked up before it even finished a single pass -- it said it had been running for two hours, and in that time it had 10 errors. Does this really, really mean my RAM is fried?
Really, really means that either the ram is DOA, or the MOBO slot is. You can figure out which it is by taking a single known good ram stick and testing the mobo slots one at a time with memtest. If it fails with a good stick on any mobo slot it is the slot, if not it is the ram. The ram should still be under warranty.

Let us know if you need help

Ken
My System SpecsSystem Spec
20 Jul 2010   #15
Tews

64-bit Windows 8.1 Pro
 
 

In all probability, however, you should test each stick seperately to be sure..
My System SpecsSystem Spec
20 Jul 2010   #16
Petey7

Windows 7 Professional SP1 64-bit
 
 

If you don't know which stick (if any) is good, you might need to try what zigzig said, but with each stick. If every stick you currently use is bad, or more than one slot is bad. than it might be harder to confirm what the problem is. Report back all results when you can.

I don't know if this is the case with every or even most computers, but I've seen a few that gave an error screen immediately after POST if a stick was in really bad shape. It makes figuring out what the problem is a lot easier. Just wanted to let you know about it in case you get such a screen while doing this.

Good luck and keep us posted.
My System SpecsSystem Spec
20 Jul 2010   #17
ashground

Windows 7 x94 Professional
 
 

Some more information:

The RAM is a OCX 8gb dual-channel kit, 2x OCZ3G1333LV8GK, currently in slots 1 and 3 of a Gigabyte P55A-UD3P motherboard.

memtest said that the errors were happening while testing around the 3.5gb - 4.5gb mark. But it's two 4gb sticks. Is this because I'm running the RAM dual-channel?

What's the best way to test from here on? I only have the 2 sticks of DDR3 and only one DDR3 motherboard, so should I test each stick in slot 1 independently? In theory, would that mean I should see errors on one if there's a bad stick and errors on both if it's a motherboard problem?
My System SpecsSystem Spec
20 Jul 2010   #18
Petey7

Windows 7 Professional SP1 64-bit
 
 

Okay, let me see if I can clarify. Get a label of some kind and place it on one of the ram sticks and right a "1" on it. This should help keep you remember which is which. Do not write on the labels already on the ram unless it is over a year old and you no longer had a warranty on them. Place ram stick "1" in slot one and run memtest. Then place that same stick in slot 3 and run memtest. If it fails both times it implies that the stick is faulty. If it only fails in one slot, then it implies the slot is faulty. Then do the same thing with stick "2". If you had no failures with 1 but you do with 2. Then stick number 2 is faulty. If it only fails in one slot, and it is the same slot the "1" only failed in, you have a bad slot. If both sticks fails in both slots, you need to run the same test but using slots 2 and 4. If both sticks fail again, my bet would be that both sticks are faulty and must be replaced.

As to your result, I don't know exactly how the test functions, but my guess would be that it test both sticks one at a time, and reports as if it were once stick.
My System SpecsSystem Spec
20 Jul 2010   #19
ashground

Windows 7 x94 Professional
 
 

Thanks, Petey7. I'll try to run the tests tonight.
My System SpecsSystem Spec
24 Jul 2010   #20
ashground

Windows 7 x94 Professional
 
 

Kind-of-conclusion:

I ran a bunch of tests, but for some reason I couldn't get RAM errors when I was only testing one stick at a time. Everything seemed fine. So I tested with both sticks in -- errors again. I switched the RAM to slots 1+2 instead of 1+3, so the RAM would run in single-channel mode instead of dual, and voila -- no errors. So, there's a problem with the RAM running dual-channel. I updated my BIOS, hoping that would fix things, but I still get errors running dual-channel. So, single-channel it is, then.

Is there anything I can do from this point? Does this mean that there's something wrong with my motherboard, or do I just have to accept that this motherboard with this RAM means buggy dual-channel?
My System SpecsSystem Spec
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 Frequent BSODs on new PC -- ntoskrnl.exe




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