|Haven't we gone thru this 3 or 4 times already? Which graphics card did you get & how much RAM do you have??|
"dg41rq has 1.5 GB graphic"
No it doesn't. The onboard GMA X4500 graphics has no memory of it's own, it uses system memory. If you're into gaming, disable the onboard altogether so that ALL memory can be used by the system. And make sure the graphics card you install is an actual gaming card, not a low end/general purpose/HTPC card. And as you were told in another thread, your power supply MUST be capable of the handling the card's power requirements. Generally speaking, it should be a reputable name brand unit, 400W or higher, 80 plus certified, with a single +12v rail of at least 30A.