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Seasonic X-Series 660W Power Supply Review

The Seasonic X Series 660W power supply ships with a paper wrap around it explaining that the fan will be inactive at less than 20% load.

The unit itself is very attractive, nicely finished, yet understated to suit a variety of windows case systems. The paintwork is deep and will withstand rough handling over time.

The 120mm fan is hidden behind a black grill without Seasonic labeling visible.

One side of the power supply is fully vented to improve air flow. At the side is a power switch and connector.

The X-Series 660W has several rows of connectors available for the modular cabling. These are all labeled for ease of installation. There is a ‘Temperature Activated Fan – Rotates only when required' sticker bottom right.

Seasonic X-Series 660W Power Supply
DC Output
+3.3V
+5V
+12V
-12V
+5Vsb
Max Output
25A
25A
54A
0.5A
3A
Total Power 125W 648W 6W 15W
660W

54A can be delivered to the +12V rail, adequate power on tap for demanding gaming systems.

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4 comments

  1. Good product and good review. I like their power supplies but where I live they always are very very expensive.

  2. When is the 650W version out? thats interesting. any improvements you know over this 660W?

  3. No new 650W version, the new Platinum one is also 660W. It has been out on a Egg for a couple weeks:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151121

    It’s based on a new platform (similar to the Platinum 860 at a lower wattage). Expected to be better built and better performing.

  4. this psu use triple balancing point, not two