I have a Kingston HyperX Blu 1x4Gb DDR3-1333 module with a Gigabyte GA-G41M-Combo mobo with a Intel Pentium Dual Core E5700 and this module is brand new as a replacement from Kingston and when I put it in the slot the computer wont boot. I also have a Samsung ddr3 1333 2gb module that works fine. Both companies (Kingston & Gigabyte) said this was compatible but it's not working out. Any help?