Unless you have a managed switch capable of binding the ports together (properly) then no (and such a gig switch will usually cos you >$500 for a semi-decent one).
Switches aren't the problem. You get LCAP capable ProCurve for about $250 or less and would easily qualify for "semi-decent" class.
Problem is the Windows, most versions come with no LCAP support. You're pretty much confined to NIC manufacturer drivers which means you either need multiple port NIC or multiple NICs from the same manufacturer, which again, is troublesome with most dual on board ports because very often they're mixed (one port Intel + one port Marvell, for example).
Anyway, apart from port trunking, Mobos with multiple ports can be useful if you do load balancing, routing, using machine as security appliance, multiple LANs, etc.