|The more important minimum spec. it must meet or exceed, if that's stated, is the minimum current the PS must supply at 12v. |
It may work but it will be probably be damaged because it is constantly being overloaded and it's likely it will eventually fail.
When it fails there's a definate possibilty it could damage something other than just itself while failing, e.g. sometimes that event kills the motherboard. Do you want to take that risk?