Reviews - Antec Signature 650W
Sample Provided by: Antec (By OklahomaWolf on Mon, Oct-20-2008)

Page 4 -

Performance (40% of the final score) - you guys probably already know what I'm going to say here. The 850W version was fantastic for performance, and the 650W is no different. I did get a little bit worse ripple and noise, but there's no way I'm going to nitpick over 3mV when the worst I saw was 16mV. The SG-850 got the first ever perfect score here from me, and the SG-650 now gets the second one. 10.

Functionality (20% of the final score) - once again, the SG-650 comes with that annoying hinging 20+4 pin main ATX connector that could get in the way on some older boards. But, methinks I was a bit harsh on the 850W version because of that. That being said, the sleeving is still not all the way into the case due most likely to those cumbersome beads on the ends of each hardwired cable. I'll do a 9.5 this time, for throwing in enough connectors to run a server farm full of hard drives.

Value (30% of the final score) - this unit currently weighs in as low as $159.99 at Newegg, with the bulk of online retailers showing it at the $175.00 level. This is a long way from the excessively high price the unit originally premiered at, which is very good to see. Getting a good idea of the value was tough, however, because there isn't much competition.

At, you can find the Zippy GSM-6600P for about this same price. That unit is perhaps the only unit out there able to compete with this one, and even then the Zippy was outperformed at 12V by the Signature.

PC Power and Cooling? Forget it... there's no Turbocool model of comparable power, and the Silencers can't cut it. The closest thing they have is the Turbocool 510W, and that's an ancient design as power supplies go.

The OCZ Evostream 600W is close to the same caliber, but can't match the ripple suppression or low noise level. Corsair? Nuh-uh... good luck finding one with this kind of ripple suppression. The SG-650 is pretty much in a league of its own here, and shows what can happen when you throw wads of cash at a renowned OEM known for server grade units and say, "Here, go nuts."

I'm going to give this thing a 9.5.

Aesthetics (10% of the final score) - the SG-650 is just as purty as the 850W, and I'm going to give it the same score. That big warranty sticker just doesn't look good on this unit, but at least the rest of it does. 9.









Total Score



Antec knocked the ball out of the park with the SG-850, and repeated the feat with the SG-650. I simply haven't met a unit that can outperform these units, and my challenge from last time seems to have gone unanswered so far. There are only three ways I can think of to improve the Signature line: release a 1kW version, bring up efficiency enough to get gold or silver from 80 Plus, and drop the price just a hair more. Otherwise, the SG-650 is a wolf in sheep's clothes - go buy one. You know you want to.

The Good:

  • incredible ripple and noise suppression rivaled only by big brother 850W
  • fantastic efficiency
  • quiet under most conditions
  • rated at 50 degrees
  • semi-modular

The Bad:

  • nothing really serious comes to mind

The Mediocre:

  • why is there no 1kW version yet?

Discuss the Antec Signature 650W in our forums here.


JonnyGURU Feeds
Add our RSS feeds to your favorite RSS Reader or homepage.

JonnyGURU Reviews
AddThis Feed Button

JonnyGURU News
AddThis Feed Button

JonnyGURU Articles
AddThis Feed Button

JonnyGURU Forums
AddThis Feed Button

Follow us onFollow Us!
Site-Info | Affiliates | Contact Us | Site-Map
Copyright © 2012 -