It should do it. Quite comfortably too.
I'll do some digging for you.
Edit. OK that's a very old model now. Has a combined rail ampage of 31 amps.
Which, depending on how you have your rails laid out would be enough. However, it's not worth running the risk. Newer 500w model Enermax would do that card all day.
Why is it though that people here all jump in with a 850w £130 power supply? honestly.
Are they taking for granted that every one is like them and would want or need something so excessive? No one is denying that they are sterling units, but not every single person needs one.
The CX600 is more than enough for what you
need and, if needs be I can prove it too.
If you have £130 to burn and want to spend it fine. At the same time why not get a 1250w Enermax Revolution for £260?
If you want it fine. If you need it get something you need.
Edit. Given that your PSU was created in 2004 I would say it's given you an amazing run of service. So, if you would like to stay on the same brand..
http://www.yoyotech.co.uk/item-detail.php?products_id=4373106
Will serve you very well so long as you don't plan on going bonkers and adding lots of asses to your swine.
And before any one jumps down my throat take a look over this system here -
http://www.yoyotech.co.uk/item-detail.php?products_id=4372743
Big OC, GTX 570 etc, 550w Antec Basiq PSU.