P4S800 high or low density memory????

I was going to buy some high density memory for my P4S800 and I cant find out if it uses High or low density memory? Does anyone know???? ASUS has not called me back!!! I am looking at getting 1 GIG.

thanks

My P4S800D-E will takeup to 4gigs of ram. I'm assuming thats dense...lol I have 2/265s in with 1/512 and its running in dual mode,SiSoft=4633

High density.