BSOD (new system)

I recently had a new PC built but it's crashing at least once per day. It crashes randomly and the crash cannot be reproduced on demand. I've tried reinstalling windows, updating drivers, updating the BIOS, installing different versions of suspected drivers and the same error still reoccurs under different circumstances.

System crashed in:
Photoshop: once
Media Player Classic(mp3) 2-3 times
Online Flash videos 2-3 times

Most major system specs should be in my profile and the dumps attached below in case anyone is able to help resolve this problem.

Attachment 127077

BSOD caused by defective hardware device(s)
Stop 0x124 - what it means and what to try

Test RAM RAM - Test with Memtest86+

Code:

BugCheck 124, {0, fffffa800842e678, 0, 0}

Probably caused by : hardware