Need help with modem configuration

Got this Netgear Nighthawk modem, but my speeds are stuck at a pathetic 100kbps. It’s just constant. I used to have a Speedtech modem and found some config online that actually bumped my speed up... anyone know where I can find a similar config for this one?! My games are lagging like crazy.

Your speed isn't determined by the .cfg file; it’s up to your ISP. I doubt you'll be able to change that. Besides, there are probably a billion other reasons why your game might be lagging.