New X51 Owner, GTX 760

Hello Alienware Owners Club!

I just picked up an X51 off of eBay. This will be my second Alienware, my first being one of the original Aurora R1s with an i7 920. Anyway, here are the specs:

i7 3770@3.4 Ghz
ITB Seagate 7200rpm HDD
GTX 560
Windows 7 Home Premium
330 Watt Power Supply

My question is, I will be ordering a new video card and it looks like the best card that will work in terms of physical size and wattage is the 760. It looks like the best of breed there would be the EVGA 760 ACX 4gb. My question is, will this card be too long? I couldn't find the dimensions anywhere unfortunately.