hello,i have a p4r800-vm MoBo and it has an integrated SoundMAX sound card.it is very quiet if i wanna listen to my favourite music how can i boost it's volume?

Control Panel>Sound and Audio Devices>Slide the "Device volume" slider up for a higher volume

it WAS on full... and it's not so loud...

uhh.. turn the volume knob.. upwards on your speakers/headphones whatever you're using

surely you have turned up the volume in your mediaplayer?...
and if all fails go see the doctor

maybe it is only for me not enough loud^^

In the sound control panel, click advanced and turn them ALL up. If that doesn't work, get a new sound card they're cheap anyways.