try taking off stuff like high-res textures. May help slightly. What computer do you have?
I have an HP...
It's not the HI-RES textures.....it just recently started spiking.
It's been doing it for a week now...
I did not make any changes to my computer.
I also made sure i had nothing running in the background such as virus scanners, etc.
I think it's just the cable company itself.
ex. Sunspots