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80 PLUS Gold: Four Efficient 700-850 W Power Supplies

Conclusion And Recommendations

The current crop of 80 PLUS Gold-rated power supplies in the 700-900 W range demonstrates what modern power supplies can really do. Each unit we tested easily accomplished the demanding tasks we threw at them.

However, there were a few small (but meaningful) differentiators among the four devices. Seasonic's X-760 and FSP's Aurum AU-700 performed especially well. The latter boasts both the best test results and lowest price. If you simply cannot do without modular cable management system, that leaves Seasonic's unit.

Antec's HCP-850 is likewise free from glaring imperfections, save the lowest efficiency numbers at minimal load levels.

Comparison Table:

AntecFSPSeasonicSilverStone
Model Name and NumberHCP-850AU-700X-760Strider Gold SST-ST75F-G
Street Price$250$130$200$ 190
Power Certification80 PLUS Gold80 PLUS Gold80 PLUS Gold80 PLUS Gold
Dimensions (WxDxH)150 x 180 x 86 mm150x140x86 mm150 x 160 x 86 mm150 x 180 x 86 mm
Weight3.9 kg2.5 kg3,3 kg3.1 kg
Operating Temperature50 °C0 - 50 °C0°C – 50°C0 - 40 °C
Warranty5 years5 years5 years3 years
Power Specifications
SpecificationATX12V v2.3ATX12V v2.3ATX12V v2.3ATX12V v2.3
Specified Output Power850 W700 W760 W750 W
Max. Peak Outputn/a750 Wn/a850 W
AC Input100 - 240 V100 - 240 V100 - 240 V100 - 240 V
AC Voltage SelectionAuto voltageAuto voltageAuto voltageAuto voltage
DC Output +3.3V25 A28 A25 A22 A
DC Output +5V25 A28 A25 A25 A
DC Output +12V (#1)40 A18 A63 A62 A
DC Output +12V (#2)40 A18 An/an/a
DC Output +12V (#3)40 A18 An/an/a
DC Output +12V (#4)40 A18 An/an/a
DC Output -12V0.5 A0.5 A0.5 A0.3 A
DC Power +12V Combined840 W672 W756 W744 W
PFCactiveactiveactiveactive
Specified Hold-Up Time28 ms17 ms17 ms17ms
MTBF100 000 hours100 000 hours100 000 hours100 000 hours
Cooling Specifications
Main Fan135 mm120 mm120 mm135 mm
Main Fan Speed683 - 1810 RPM2400 RPM1850 RPM1800 RPM (Max.)
Secondary Fann/an/an/an/a
Secondary Fan Speedn/an/an/an/a
Connectors & Environmental
20+4 pin Motherboard1 x (55 cm)1 x (55 cm)1 x (60 cm)1 x (55 cm)
CPU2 x (65 cm)2 x (55 - 70 cm)2 x 65 cm)2 x (55 - 75 cm)
PCI Express 6-pin/6+2-pin (Graphics)0/6 x (55 - 70 cm)0/4 x (55 - 65 cm)0/4 x (60 cm)2/2 x (55 - 70 cm)
Molex 4-pin (Peripherals)6 x (55 - 85 cm)4 x (85 - 100 cm)8 x (55 - 85 cm)6 x (60 - 90 cm)
SATA Power9 x (55 - 85 cm)7 x (55 - 100 cm)8 x (55 - 85 cm)8 x (60 - 105 cm)
4-pin Floppy1 x (100 cm)1 x (115 cm)2 x (100 cm)2 x (105 cm)
Product Specifics
AccessoriesScrewsScrews, Velcro StripsScrews, Velcro Strips, Lacing CordsScrews, Velcro Strips, Lacing Cords
Cable ManagementYesNoYes, full modularYes, full modular
  • compton
    Every now and again you can catch the Seasonic X series on sale. I picked up a X-650 for about $110 with shipping. For that price, there isn't really anything better. With out a sale, I still say full modular and 80+ Gold is worth the premium over less auspicious contenders.

    Thanks for an excellent review.
    Reply
  • jjb8675309
    no need for a 200 dollar psu for me
    Reply
  • on the seasonic X-760 introduction, the first paragraph states that it comes with hard-wiring. But if you look at the pictures, and further down the review, you'll notice that it is fully-modular.

    no pun intended here ;-)
    Reply
  • The Greater Good
    comptonEvery now and again you can catch the Seasonic X series on sale. I picked up a X-650 for about $110 with shipping. For that price, there isn't really anything better. With out a sale, I still say full modular and 80+ Gold is worth the premium over less auspicious contenders.Thanks for an excellent review.
    I've used the X 650 in builds for two of my friends. I can't wait to get mine. The cabling is perfect for the Antec 1200 case.
    Reply
  • What about noise? Only had a quick glance at the article but that didn't seem to have been measured.
    Reply
  • flong
    Great review, but where is Corsair???? Certainly Corsair is one of the industry leaders and most recommended PSUs on the market.

    This review would have benefited greatly by including both silver and gold rated PSUs from 750W - 1000W. Some Silver rated PSUs actually perform at nearly at gold levels (Corsair) and so they are a great value.

    It would have been nice to have some expert comment on Au's claim that a non-modular cable setup improves efficiency. This appears to be a myth because we see many modular units outperform non-modular units in their class.

    Still I really enjoyed this review.
    Reply
  • jah_33
    Not to forget is that a 80+ PSU generates about twice the heat of a 80+ Gold PSU, 20% compared to 10% of the power output. So a gold certified PSU should be significantly more quiet then a 80+ given equal cooling.

    flongGreat review, but where is Corsair???? /citation]Corsair don't build there own PSU:s the are mostly Seasonic built, some CWT. For example the Corsair AX series are nearly identical to the Seasonic X series, the only difference is the fan.
    Reply
  • darreng101
    I have a SeaSonic X-760 fitted to an O/C'ed i7.

    The 'fan-on' at 20% (i think without looking back) is worst case, mine kicks on at about 30-35% depending on ambient temp, so its awesome quiet. Even when on its quiet.

    It works very well in a dual gaming/home cinema box...

    I'd definiately recommend one
    Reply
  • lol. 200 dollar psu's!

    are you guys complete noobs! do you think we need this ...?
    Reply
  • dominatorix
    ok., compare: http://www.tomshardware.com/reviews/gaming-psu-efficiency,2796-11.html
    with: http://www.tomshardware.com/reviews/750-watt-psu-80-plus-gold,2927-3.html
    Reply