Will this graphic card fit my small compact computer?

Hey i have an Acer AX3910 and at the moment I'm using the onboard intergrated graphics ( GMA x4500 ) and it's so bad for gaming.. i'm trying to find an update but it's hard due too the fact my PC is a slimline one however i've found a low profile card and was wondering if.. A) Will it fit into my case (About 4-5 inchs wide) and B) What power supply does it demand because the spec doesn't specifiy.. Here's the link, http://www.misco.co.uk/applications/SearchTools/item-details.asp?EdpNo=509009&Tab=2&NoMapp=0 i know it's not the best card out there but anything is better then intergrated.. and my mobo is the Acer WG43M.