Review Index:
Feedback

Seasonic Gold Series X-750 Power Supply Review

Manufacturer: Seasonic

Under the Hood

View Full Size

The Seasonic Gold Series X-750 power supply is based on the X-Series design, which becomes apparent as soon as the cover is removed.  One of the most obvious features is the +3.3V and +5V voltage regulators have been moved off of the main PCB (or daughter cards) and onto the modular DC connector board, which mounts to the front of the enclosure.  This is a major innovation shared by all X-Series power supplies and offers several advantages.

• Reduced wiring results in less resistance to current flow and higher efficiency
• Reduced wiring also results in a cleaner layout with better airflow
• Reduced part count results in higher reliability and lower cost

View Full Size

(Courtesy of Seasonic)

The biggest advantage to moving the two VRMs onto the DC connector board is that it virtually eliminates the high current distribution wiring that previously had to route the +3.3V and +5V outputs to the connector panel.  This distribution wiring had to carry high currents and therefore was subject to line resistance and voltage losses.  With the new design, only +12V has to be delivered to the modular DC connector board, which can be distributed more efficiently with fewer and smaller wires (as voltage goes up, current goes down for the same power).     

View Full Size

The X-750 Gold main PCB is basically a +12V PSU that also includes a small -12V regulator and the +5VSB section.  All of these output voltages are sent out via modular connectors soldered directly onto the front of the main PCB.  Additional connectors supply all the other connectors directly from sockets soldered onto the modular DC connector board.

View Full Size

Looking inside the Seasonic Gold Series X-750 PSU, you will see the two main Japanese made capacitors on the primary are rated at 270uF, 420V, and 105°C.  The secondary features predominantly solid polymer capacitors with a few Nippon Chemi-Con electrolytic caps thrown in for good measure.  Just like all previous X-Series power supplies we have seen, the layout and component selection appears to be excellent.

View Full Size

February 6, 2013 | 10:07 PM - Posted by Freshie

Are you going to review the x-850 too?

February 7, 2013 | 10:13 AM - Posted by Skidmarks (not verified)

Seasonic's PSU's are excellent. The only brand I use.

February 15, 2013 | 05:16 PM - Posted by John Doe (not verified)

Then you should maybe not judge things by their brand like a moron and start buying PSU's from other companies.

February 17, 2013 | 11:14 PM - Posted by bdfun2662

I have had this unit for a couple of months now and I have had zero problems so far. I got it at newegg on a super sale for $107.50 delivered to my door. It is overkill for my Sabertooth R2 8350 (4.5), MSI 7850 (1000 and 1250), 2 7200 rpm HDD, 1 Vertex4 128 GB, LiteON BD burner and 8 PWM fans. The most I seem to be using is a little over 350 watts and that is when I am ripping a BD disc and converting it to an MKV file about half the size. I had higher overclocks on both my CPU and GPU but I backed them down to a point where they run close to normal temps. I do believe that in order to obtain high stable overclocks you need a very good power supply and this is one.

March 30, 2013 | 08:07 AM - Posted by Anonymous (not verified)

I have this KM3 baby. Very solid power under load and keeps system running over minor power interruptions. (e.g. thunderstorms)

Really, really love this beast.

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Lines and paragraphs break automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <blockquote><p><br>
  • Web page addresses and e-mail addresses turn into links automatically.

More information about formatting options

By submitting this form, you accept the Mollom privacy policy.