David
Thanks for your prompt info. In reply the Crucial ram type etc taken straight from their invoice ...
4 off 4GB DDR3 PC3-12800 CL = 11 Unbuffered Non ECC 1.5V 512Meg X 64 ... DDR3 1600
Part No - CT 3724549
As i stated i did use the downloadable Crucial RAM requirement analyser and ordered there and
then from them.
Cheers
Bob