said by Chrno:It would depend on the intended use of the system. The system would make a great BTC miner and in that case, with 2 cards, you will see some very inflated numbers (sustained). Running hashes with this card will yield numbers very similar to those found while running furmark.
3DMark isn't the right bench to use if you want to find what the card is capable of drawing.
Which he openly said in this thread he is not doing. Even if he was, as others have stated, he is not close to the amperage rating on the 12v rail. That PSU is fine for that system for years to come (unless full custom WC is added, which has already been discussed)