That's an ASUS Socket A motherboard.
Memory Type DDR SDRAM, Number of Memory Slots 3 x DIMMs
Supported RAM speeds 533 MHz • 400 MHz • 333 MHz • 266 MHz • 200 MHz , Max Supported RAM 3 GB
Here are links to the spec's and manual on your MB.http://www.dealtime.com/xPF-Asustekhttp://support.asus.com/download/download.aspx?model=P5K%20Deluxe/WiFi-AP&SLanguage=en-us
I would put 3 sticks (1GB x 3) of PC-3200 DDR Ram. total ram 3GB. Win XP will not utilize much more than 3GB. Also, if you put 2 PC-3200 and 1 PC-2700 they all three will run at the lowest sticks speed, in this case PC-2700.
Yes, the video card will work but will probably bottleneck at the CPU.
A complete upgrade is what you need!!!!!