Probably. But you will most likely also be getting close to the upper limit of your PSU.
Guessing from the specs you gave you most likely only run 1 hdd?
On the other hand if you happen to be running a large raid array, and multiple fans, lights, etc you may top out.
Galax recommend a 300w PSU or greater but they also list the max draw for that card at 29w.
http://www.galaxytech.com/__EN_GB__/Product2/ProductDetail?proID=30
You've also gotta remember that everything adds up, even things like USB devices. Sure they don't use much but there will always be the straw that breaks the camels back so to speak.
It's also not recommended to run your PSU at or close to its max output as it tends to drop the efficiency of the unit.
This site...