GPU RAM required per app?

Is there a table or list somewhere that details the GPU RAM required per app?

I am looking for:

1) the minimum GPU RAM required by the server, per app. If the GPU does not meet this minimum amount, no tasks for that app will be sent.

2) The max GPU RAM that would be used per task, for each app. So while the server may require (made up example) 500mb for app Z to get tasks, the max it will ever use is really 320mb. So I know I can run no more than three tasks on my 1gb GPU at a time.

A table with these values would be extremely helpful.