I've bought a HyperX blu 4Gb DDR3 1600Mhz CL9 1.65V memory stick and installed it on my Gigabyte GA-G41M-Combo motherboard ( http://www.gigabyte.com/products/product-page.aspx?pid=3505#sp ) When I started the computer,the monitor was black,not even a movement.When I tried the old sticks,it worked just fine...can you help me with that?