Can I install my own router if my landlord provides internet/his own crap router?

[Jeff]

Hey there,
Thanks in advance for any answers to my question. I live in an apartment, my landlord lives directly below me. He pays for internet/tv. The internet connection is pretty weak, but I have a nice video-gaming router from my last apartment. I was wondering how I could connect my own router in place of the old crappy one. Is this possible? Would I need any information from my landlord in order to do this? I have direct access to the old router - it's in my apartment unit. Thanks again
@BigTimber : Would I need any administrative access to get it to work? Passwords etc?

[Big Timber]

Change it out and see if your performance improves. But you will only be as fast as his internet connection is.

[Boss]

Yea you can try another router but just make sure it can work with your ISP.