We have 75/15 internet, and our down is perfectly fine, sometimes as high as 97Mbps. However our up ranges from 7-10Mbps. When we first upgraded to 75/15 last July, our up speeds were fine. Below is a graph of our upload speeds. I'm wondering what's going on with the lack of up speeds, or if the issue is the older Comcast SMCd3g-ccr modem.