Please provide more information about what you have been upgrading.
I'm just going to take a wild stab in the dark here and ask is it a PCI-E graphics card?
Anyway get back to me and let us know the current specs and what was upgraded, and what were the previous specs.
I will try that on the PC I had a problem with, removed everything and replaced it several times but still get this weird beeping and wasn't too sure why.
For me it appeared to be the graphics card was burnt out but had no way to test it for sure.