Help with PSU for GPU with multiple outputs

[LSDance]

Hi to everyone,

I'm gonna buy a HP Workstation and I have an application that demands multiple monitors. Initially, I'm planning to use 2 VisionTek cards of these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814129274&cm_re=visiontek-_-14-129-274-_-Product
in this HP desktop:
http://www8.hp.com/br/pt/products/workstations/product-detail.html?oid=5225033
The Workstation come with 400W or 600W PSU. I think that 600W can handle easily this system, but I'm not sure about that be cause I'm not expert in server architectures and multiples monitors, so I would like to ask some help of the community in this task. Thanks to everyone.

 

[Dark Lord of Tech]

http://www.techpowerup.com/reviews/HIS/HD_7750_7770_CrossFire/21.html

 

[LSDance]

Thanks a lot dude. Sorry about the delay, the project was closed and them return!