This is a ConVar you can enter in to limit your frames per second. It is recommended that you limit your frames to the refresh rate of your monitor, because any frame rate above that is wasted.
fps_max <frames per second>
<" and "
Example: If you wanted 85 frames per second, you would type in the console:
Quotation marks around strings are not always required, but should be used to ensure that special characters, such as spaces and semicolons, are not misinterpreted. For number-only strings, quotation marks should not be used.