Yesterday i replaced my graphics card with a XFX Radeon HD 6750 HD-675X-ZMFR 1GB 128-Bit GDDR5 PCI Express 2.1 x16 HDCP and a new 600w power supply ... but i got the graphics card from a friend butbit was never used well he dident have the driver disk for it and all im getting is a no signal on my monitor ... do you think the no signal is because no drivers??? And if so is there a way for me to do it without having the disk