PCDev has made a quick correction regarding the FPS cap for ranked matches:
Correction: Yesterday I said that FPS would be capped at 120 for ranked matches. The cap will actually be 200 FPS for ranked matches. This cap is needed to prevent monster rigs from degrading dedicated server performance. Frag on, please.
Treyarch’s PC developer, or PCDev as he’s known on Twitter, has shed some light on some limitations for the PC version of Black Ops 2 among other things.
The field of view (FOV) is capped at 80, as PCDev stated, “And don’t ask me to raise the FOV cap. Max is 80. Thankyouverymuch.” The developer cited “technical limitation” in regards to the reason why FOV doesn’t go above 80. He also added “otherwise I would raise it [FOV] to stop all the QQing.”
In regards to the previously mentioned ‘Unlimited FPS’, PCDev explained that “you can set the FPS cap to Unlimited.” However, PCDev adds that there could be a
120  FPS cap placed for ranked matches as he states, “There is a cap of 120 FPS (I think) on dedicated server matches (ranked) though.”
In terms of the size of the game and the number of discs that Black Ops 2 will be available on for PC, PCDev revealed that the retail version of Black Ops 2 will be on “2 dvds” and the game “will require ~15-16GB HD, depending on language and edition.”