Looking for site to test if game will work

Somewhere here in Entertainment is a link to a site that somehow checks your system to see whether or not a game will work.
I used it to see if my computer would run Skyrim and it failed.
But, for the life of me, I cannot find that thread.

I'm wanting to buy Civilization V but I'm hesitant because I don't know if my computer can support it.
Does anyone know of or remember the link so I can test my machine?

Thanks :)

Here you go! Just type in the name of the game and follow the instructions!