I think if :
1. Silver Surfer was in a beer enduced stupor,.. in fact passed out .
2. After Partying nonstop for a few months in a cosmic ray - proof bunker miles below the surface.
3. having bed breaking sex with "every" superstrong attractive female in the MU one after another,.. in multiples and even while drinking during this time period with no rest.
4. While powering the North American Continent thru a nipple clip.
5. And Magneto attacked him in the bunker while he was sleeping.
Magneto would have roughly a 15% chance of producing a tie,.. esp if it will allow the surfer to go back to ruining She-hulk for the likes of Hercules or Juggernaut.
This is such a mismatch of power,... Everything Mags can do with effort, SIlver Surfer can do while being involved in a threesome and doing a crossword puzzle based on obscure Gods's of the forgotton Gods of the Marvel Multiverse.