Hey guys. I recently built a new computer and sold my older one to my dad(for cheap). Anyway, basically we are both using ethernet cables. When his computer is on my latency is super high(450ms) but when i put his computer to sleep my latency is good(40ms). I have tried a variation of ethernet cables. and if I change them they generally work fine for 30 secs and then my ping is off the charts again. When i plug in my sisters laptop and my computer with ethernet my latency is good. So its just my dad's computer. I have had the modem reset, unplugged the router, and had the mediacom guy come out. He fixed it but 2 days later it isn't working again. Please help!