First I will start with my system specs (all drivers up to date)
new= 2 days old.
Intel core i5 4690k (new)
Msi z97 gaming 7 mobo (new)
Gskill 16gb 1600mhz kit (new)
Radeon HD 7970 3gb (1year)
Kingston 128gb SSD (new) 2nd one first one died.
Corsair tx650 psu
4 HDD for storage
Hyper 212evo cpu cooler.

My problem is that whenever I download from a game client is lags out my entire PC to its knees. I have tried this with Archeage, Steam and Blizzard. It also seems to happen when downloading from my browser(Chrome). I have tested it out with torrents in which case I was downloading at 2gbps and the pc seemed fine, also I don't seem to be lagging in games. I have tried to search for this problem but seem to be a lost sole wandering the desert. In advance thanx for the help guys atleast I can still game :D