as you can see on my signature of my pc. i was wondering does it make a lot of different moving from a 4gb ram to 8gb ram? for me, i see no different. i feel like it's the same. opening the same application on a 4gb is the same as if i put another 4gb more. from power on to desktop and until the spinning of curious stop is the same time as i have a 4gb. could my motherboard be damaged? the reason i said that is because every time if i unplug the dvi cable off from the MB and then few minute later plug it back in, and power on, my pc start to boot then a few second later it turn off itself then turn on itself again. from there on i see no post or any signal to monitor, even mouse and keyboard had no light . then i manually power off, few second later power on. i had to do it like 2 or 3 times until i see POST on the monitor and mouse/keyboard light led up. it an onboard video card. i even try pci express x16 and still the same as i mention above. any idea?