Re: I need some upgrading help
If you don't play games, then you should be fine with that card.
If you can find a socket-939 Sempron, then get one, but if you can't, get a socket-754 Sempron. The difference between a socket-939 Sempron and an Athlon 64 is just L2 cache size, which barely improves performance in most tasks.
Windows XP Pro 17" LCD Monitor (1280 x 1024)
nForce3 250 Chipset Athlon 64 2800+ w/ C'n'Q
1 x 512MB DDR400 CL3 SDRAM 40GB IDE 7,200rpm HDD (8MB Cache)
nVidia GeForce MX420 64MB PCI On-Board Audio