4th gen i7 memory
Just a warning.
After taking a look at a laptop for a colleague which was acting up.
These 4th gen machines need 1.35v ddraml
His appears to have been delivered with 1.5v and as far as I can tell this has cooked the proc or some other important bit of gubbins.
So if you getting a new computer just check what ddram they have fired in it. Amazon have agreed to take his back so we have cloned his disk and packaged it up.
It was all very weird how it failed though. I wonder why they haven`t stuck an extra lug or something on the 1.35v slots to stop you putting the 1.5v in.