Hi everybody new here I am trying without success to upgrade my IBM Thinkcentre A30 8199 RAM. I bought a new memory stick 512 MB PC2100 266 MHz 184-Pin Dimm from the memorystore .com. I also have a GE Force 5500 graphics card installed I don't know if this makes a difference or not. I've installed it and when I turn my computer back on I get 8 beeps and nothing on my monitor. It will not boot. Thanks for your help.