Can't tell what's causing BSODs (dumps attached)

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I built a computer for somebody about a year ago and he's been regularly having problems with blue screens. The memory has been tested with memtest (however I still think this might be the problem), the graphics card swapped and tested, Windows reinstalled, and he still gets BSODs at an average rate of about two a month. Between March and June there was a period in which he didn't get any, but in June and July so far he's seen four. I'd like some help analysing the most recent dumps, because I really have no idea what it might be.

All help will be much appreciated. Thanks.

The OS is Windows 7 64-bit.

 

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Anyone? I've tried analysing the dumps myself but I don't have the experience to tell what the BSODs are being caused by.

 

[HonorGamer]

It's showing that you are having memory corruption. Please try this: http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

Post back results.

 

[und]

It's showing that you are having memory corruption. Please try this: http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

Post back results.

Thanks a lot for replying. That's what I suspected but I've already run memtest. I'll try swapping the memory out and see what happens.

 

[HonorGamer]

Make sure you unplug everything, and there is no power running to the motherboard.