Multiple beeps on start-up

My computer will not boot. I have Windows 2000 Advanced Server installed. I added a second NIC card and additional RAM. When rebooting I got a blue screen that said it was dumping physical memory. It cycled and restarted and again blue screen with another memory dump. I decided to take out the NIC card and RAM I had installed. Now I get nothing but a constant beeping. I tried to boot from the boot disk but start-up does not make it that far. The box is a 650mhz Pentium III 320MB RAM 32G H/D. I am not concerned about losing any info as there are only programs installed that can easily be reinstalled.