Random BSOD error code 40/1a

[risoen]

Hello

Newly I ordered parts, and built my own computer. It was running great in the beginning, but the past few weeks I have been bothered with random BSOD. I get the error codes 50/1a. The most recent one is this:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1044

Additional information about the problem:
BCCode: 1a
BCP1: 0000000000041790
BCP2: FFFFFA800081EDC0
BCP3: 000000000000FFFF
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

I doesn't happen when I play for instance "The witcher 2", but it usually happens when I'm just surfin' the web, while playing music with spotify, and skyping. I have thought about it beeing a RAM-error, but figured I would post here and hope that someone with more knowledge than me would reply.
My specs are:

Cabinet: CM Stor Trooper(Not that it matters...)
Motherboard: Asus p8h77-m
CPU: Intel Core i5-3570k 3,4 quad core
RAM: Corsair Vengeance DDR3 1600mhz 2x4 GB
GPU: XFX Radeon HD 7970 Dual Fan
PSU: Silver Power 850w
HDD: Seagate Barracuda 2TB 7200 rpm
SSD: Corsair Force Series 3 120 GB

Any help is appreciated.

 

[risoen]

Sorry, the error codes I get are 50 and 1a, not 40 / 1a.

 

[oneeye_72]

Check that the main motherboard connector is firmly plugged in, that's the long 20/24 pin one, this can cause all sorts of random error and crashes if its not making good firm contact.

 

[risoen]

It is. I ran memtest previously, and got 1 000 000 + errors.. I checked with only one, and still got errors. I checked my bios, and my motherboard had configured the ram to 1333 mhz. I changed it to 1600 and now I am only getting error with one of them, so I suspect one of them has gone to shits?

 

[oneeye_72]

The 77 chipset is fussy about mmemory.

Is the memory you are using 1.5Volt, if its 1.65Volt, you will need to lower the voltage by small amounts in the BIOS until its stable.

If you don't get it below 1.6Volts, it could damage the CPU.

If its already 1.5V, I think your right, you need to swap out for different memory.

 

[risoen]

Okay, so my BIOS says the memory voltage is already set to 1.5V.

Then I should swap out the one that doesn't work with one that does, or should I just swap out both ? I have 10 year warranty from the site where I bought it anyway so...

 

[oneeye_72]

Swap them both for a new matched pair at 1.5v, and you should be good to go.