If you work 24/7 that's only 3.42857142857142857142857142857143 hours a day
ATI HAS has shown off a new model for its FirePro line of enterprise graphics cards.
The FirePro 2450 MV features support for up to four monitors and 512MB of graphics memory while using roughly 18 watts of power. The card will support PCI Express 2.0 connections and either DVI-I or VGA displays. MV stand for multi-view.

The company said that the new FirePro 2450 model would target markets such as financial services where users often require a card which can power multiple displays on a single workstation. µ
18W for that sized cooler is a bit too optimistic my friend. I'm guessing 40W+