Ipoker use extensive bandwith usage because it use many picture compared to stars or others room.
i play approximately 6 - 8 hours per day on the ipoker network and use a 3G dongle to do, so my download rate runs constant at around 3.5MB per hour my upload runs at around 0.5 MB per hour. this means that for an 8 hour session i use aprroximately 35MB
( the figures can be found in the internet usage history file that comes with every service providers downloads failing that look in your drive cleaner programme - run analysis and this will show you current usages )
try closing all additional programmes that you dont require during your game play such as skype facebook and other social media programmes unpin from start up menu all irrelevant programmes so that other than your poker client and your security programme no programmes are running in the background and eating up data allowances
hope this helps
Have you looked at windows update configs? That bastard used to hog all my bandwidth before I turned it off.