I never really did shut off all other apps when running games. I just never loaded them in TSR to start with with the old single core.
Much later, I created custom logins "Clean" and "Internet", where clean would be for games and absolutely nothing unnecessary running, including services like the "Wireless Zero Config". The internet login had the software firewall with no exceptions and active viruscanning, and all the other TSRs that are useful when working.
Admittedly, I did it more to save memory than actually get any benifit from the CPU.
Now that memory is also at rockbottom pricing, I've just gotten lazy I guess.
Much later, I created custom logins "Clean" and "Internet", where clean would be for games and absolutely nothing unnecessary running, including services like the "Wireless Zero Config". The internet login had the software firewall with no exceptions and active viruscanning, and all the other TSRs that are useful when working.
Admittedly, I did it more to save memory than actually get any benifit from the CPU.
Now that memory is also at rockbottom pricing, I've just gotten lazy I guess.