Here if your system specs.... and here is a link to some RAM that works with your setup. I hope this helps.
http://shopping.yahoo.com/shop?d=zcrm&id=1990723131 The specs for the RAM you want are 168 pin PC100 SDRAM looks like you can only do 256 max per memory slot.
COMPAQ PRESARIO 5BW120
Compaq P/N - 180505-003
UPC - 720591377311
Dimensions & Weights (H x W x D)
Unit: 17" x 8.9" x 17." (25.5 lbs.)
Package: 24" x 14.95" x 23.6" (41 lbs.)
Free MyStyle Accent Color Kit(1)
Includes Windows 98 Second Edition - the home version of the world's favorite software
Processor
Intel® CeleronTM processor 600 MHz
66 MHz system bus
128 KB L2 Pipeline Burst Cache
Memory
64 MB 100 MHz SyncDRAM, shared memory architecture, two total DIMM slots upgradable to 512 MB (SyncDRAM DIMM required) - up to 11 MB of dynamic video memory
Hard Drive
15.0 GB UltraDMA hard drive(2)
CD-ROM drive
40X Max CD-ROM drive(3)
Graphics
Integrated Direct AGP 3D Graphics
64-bit hardware-accelerated 3D graphics
Video Player (AVI, MPEG and others)
Maximum non-interlaced resolution of up to 1600 x 1200 (when supported by monitor)
Audio
ESS Allegro Audio
Audio CD player
Create, organize and play digital MP3, WMA or personal CD audio files on your PC
FM Synthesis Emulation (4)
Diskette Drive
3.5" 1.44 MB diskette drive
Modem
56K ITU V.90 modem(5)
Mouse
Internet Scroll Mouse
I/O Interfaces
Four USB ports (2 front, 2 back)
Serial RS-232C compatible, DB9 connector (16550)
Parallel EPP/ECP standard centronics-compatible interface (DB25 connector)
Joystick/MIDI/Gamepad compatible game port (back accessible)
RJ-11 phone jacks (1 input, 1 output)
Audio ports (line-in, line-out and microphone-in)
Mouse and keyboard ports
Monitor connection (VGA)
Expansion Bays (five total)
3.5" 1.44 MB diskette drive
Hard drive
CD-ROM drive
Two drive bays open for expansion
Expansion Slots (four total)
One PCI slot with modem installed
Three PCI slots open for expansion
Compaq USB Internet Keyboard
One-touch buttons take you directly to your favorite Internet activities.
Instant Internet - Your personalized start page that delivers daily news and information.
Instant e-Mail - One-touch access for sending and receiving e-mail.
My Presario - Learn how to get more out of your PC and the Internet.
Entertainment - The inside entertainment scoop featuring music downloads, video, Webcasts, news and reviews.
Activity - Discover Cam, Photo and Music activities designed exclusively for Presario users. Plus you'll find step-by-step instructions that make online fun easy.
Search & Research - Search the Web for the latest news, information, music and much more, all with the touch of a button.
Retail Central eCommerce - Go shopping at your favorite computer store and a variety of popular retail sites at the touch of a button.
My Program - Personalize this one-touch button to launch your favorite Web site, application or document.
Help - Push this button when you need technical advice or help.
Navigation Zone - Ergonomically designed for comfort, new directional keys enhance gaming and Web navigation.
Multimedia Zone - One-touch CD controls. Play/pause, previous track & next track, volume up/down, stop, eject, mute and sleep.
Wireless Internet Networking Capabilities
Access and share the Internet, your files and printers from anywhere in the house with optional Compaq wireless products
Internet AccessQuick and easy Internet access with the purchase of a Compaq Presario Internet PC
Unlimited 2-month free trial from Compaq.NET powered by MSN
- One master e-mail account with unlimited Web-based accounts with MSN Hotmail, 12 MB personal Web page space, 20 MB of Compaq online backup and personalized start page
- Access to online services such as MSN's MoneyCentral, and My Presario Activity Center
500-hour free trial from AOL
- Seven e-mail addresses, personal Web space and access to AOL's Instant Messenger(6)
Power Supply
Steady-state 145 watt power supply