I have an old Dell Dimension 5100, bought in 2005 (had a 512MB RAM) with PCI Express x16 (1),PCI (2), PCI Express x1 (1). It came with XP Media Center Edition. Can I do the following:
1. Install this pair of memory Corsair TWIN2X2048-6400C5DHX (2 X1GB). Corsair website had Dell Dimension 5100C but not 5100. But I couldn't notice any big difference between the memory specs (DDR2 PC2-6400) on both of those on Dell's website.
2. Remove both the PCI Cards (one with phone/fax modem and other with S-video in ports & Coaxial) and install PCI firewire 1394 and PCI wireless cards.
1) The Corsair memory parts claim to run as advertised at 1.8V, so you should be OK. The Corsair memory Dell pedals for a higher price has a higher latency (slower) and runs at 2.0V. Note that you could prolly save a few bucks more by buying cheaper memory, same specs - you don't have to stay "Corsair". Kingston would be $1 cheaper, and no mail-in rebate hassle.