I own a BIOSTAR G41D3+. I bought a 4 gb ram yesterday. I had 4gb previously. so subtotal its 8gb. But my motherboard only detects 4 gb. even with 8gb added. sometimes it doesnt get any display. I thought the ram is bad so i went to the shop for warranty. But in the shop's computer i saw it was running. So, I came back. Then my cousin gave me a 4gb ram and surprisingly the motheboard detected it fully means 8 gb. Both of the new rams were 1600 mhz . Now I am confused . is it a problem of ram or the motherboard????????