This comes from an old review on Computer Shopper.
The new Compaq Presario 5320US featuring an Intel® Pentium® 4 1.5GHz processor and the new Microsoft® Windows® XP operating system, offers the latest technology with the easy to use Presario design. This speedy system also provides a large 40GB hard drive and comes standard with 512MB of memory. And don't forget the DVD and CDRW drives and ethernet and modem connections. This is the system you've been waiting for at the price you've been dreaming of.
Based on the other available specs you can upgrade max to 1.5 gigs of (DIMM) SDRAM. You can also upgrade your Video Display Card to any high end 128mb AGP card. To determine the mobo's cpu upgrade capabilites you need the mother board manual.
HTH
Mike