I'm basically looking for memory that will work in a P55 motherboard with a i5 750 @ 4GHz but I'm unsure if I should go with this set
http://www.overclockers.co.uk/showproduct.php?prodid=MY-043-GS&groupid=701&catid=8&subcat=1517
or this
http://www.overclockers.co.uk/showproduct.php?prodid=MY-037-GS&groupid=701&catid=8&subcat=1387
http://www.overclockers.co.uk/showproduct.php?prodid=MY-043-GS&groupid=701&catid=8&subcat=1517
or this
http://www.overclockers.co.uk/showproduct.php?prodid=MY-037-GS&groupid=701&catid=8&subcat=1387