War Thunder — Is there a limit on how many codes per account?

Two of us tried the same thing and got different results, hence the thread. The difference only becomes obvious once you look at the frame times rather than the average.

If someone has a link to a proper explanation, I will take it.

This comes up a lot, so: the trick is to change one thing at a time and actually note the result before touching anything else.

Report back once you have tried it.

Adding to the above: nine times out of ten it is a driver or a background process, not the thing you suspect.