What does 22 continuous beeping mean on IBM ThinkCentre?

I have a IBM ThinkCentre 8189 running Windows XP (old I know). I just replaced the graphics card because while using the old one kept giving me a gray flickering screen.(I tested the monitor on another tower and it didn’t have any problems.) Now when I start it up, the following happens in this order.
-Manufacturer Screen displays
-Windows OP loading screen comes on
-Screen Stays blank while the windows welcome sounds plays
– 22 continuous short beeps followed by a long break in the beeps then it proceeds to start over
-screen is still blank so can’t see error message is there is any.
Any ideas as to what it could be?