We are talking about initial instance configuration. It might expand latter up to 10 GB depending on database size. You misunderstood me, to be frankly. And another thing is.. might be your code need to be optimised?

as in my case I have the instance with 800 GB databases (where 2 databases around 250 GB and few more sharing 300 GB each (mdf)) and my temp db is only 6Gb for the instance. Instance is used for production. So with your 200 GB tempdb .. of course it depends what your general mdf volume.. but you definitely having problem with your code.

It was just an example.