Software to speed up internet?

[Knuckle]

The title may seem a bit ignorant, but I was wondering if there was a software method to increase the flow of download speeds. I currently have comcasts blast! package which includes 50mbps download speeds.

I understand there are network cards to improve network performance, can anyone vouch for their usefulness? I have the asus maximus ROG hero motherboard so thats the ethernet connector I'm currently using.

I'm not complaining about my current download speeds, but if I could 'turbocharge' them if there's a software that can funnel it to a more rapid speed that would be cool.