Following up from Alva's post, I reall like those target oc comps.
Have a target OC stage, 5 benchmarks that vary high/low cpu, high/low/multiple gpu. Maybe allow the benchmarks names before hand, but the scores all released at the same time. That way, it becomes a mad scramble for all countries to get as many people as possible onboard to bench across the board, and isn't dominated by a handful of people for all stages.
Please take into consideration the timezones then. Starting at 3am for some countries would wipe them out of contention completely.
Oh and aim for scores that would be very hard to hit exactly. No fun there to get a the score in 2hrs, to then move onto other benches.
thoughts?