I am running out of ram. I increased my ram to 1GB. I still crash if my bandwidth goes over 1MB up and 1MB down.

Edit: I am running out of ram. I increased my ram to 1GB. I still crash if my bandwidth goes over 1MB up and 1MB down. I have been having my router crash for about 1month every few hours. I have increased the ram to 900MB but hasn't fixed it. I have more routers but this is giving me a problem for s...