Hmmm,

Yes stuff can fail, but it usually does it in the first 3-7 days. Remember only a small sample are tested.

What you are describing could also be your video card............I have seen several of those that are actually sold in an overclocked condition.

I would EARTH (ground?) myself. Remove the memory, clean & re-seat it and do the same with the video card. Check that all the fans are working whilst you are at it.

Then see if you can borrow a spare video card and try with that. It does not have to be anything fancy, a PCI one will do.

just a thought