Re: Steam downloads slowwing down
If you're using a DSL ISP connection, there are a number of things to look at. A DSL line in most areas requires a filter in-line, to avoid erratic, or interrupted, data streaming. Are you using a decent filter?
Since you use the term "modem/router", I guess that means you're using a one piece device, not a separate modem, and router. That makes it easier. Do you have another modem/router that you could substitute for yours, or borrow another one, to rule out a bad device?
HAF 932 Advanced / Corsair AX1200 / Asus Rampage IV Extreme / i7-3930K / H100 Cooling 4x120mm
16GB Corsair DDR3 / GTX 580x2 SLI + GTX 460 PhysX / SSDs Mushkin 240GB, Crucial 256GB, Crucial 512GB