FSP Everest 80Plus 700W PSU - Testing the Everest 700W PSU

Article Index
FSP Everest 80Plus 700W PSU
Info, Features and Specifications
Inside the PSU and Test Setup
Testing the Everest 700W PSU

Testing - 380W & 620W: 

We initially plugged the PSU into an EZ PSU Tester 3 in order to power it on for our "idle" measurements.  However, this PSU would not power on for more than a split second without a greater load applied.  Because of this, we decided not to include "non-load" tests this time around.  Although no PFC numbers are reported in the specifications, we measured this to be between 0.95 and 0.98 which is fairly good and is quite efficient.

Just before we jump into testing it would be helpful to know what each of the +12v rails do.  There was no information on the main part of FSP's site, but a download of their Tech Diagram helped clear things up a bit.

  • +12v1 = 8-pin power connector - Normal output is 9A = 108W
  • +12v2 = 4-pin power connector and connected 6-pin PCIe - Normal output is 9A = 108W
  • +12v3 = 24-pin motherboard power connector - Normal output is 9A = 108W
  • +12v4 = 2x Modular PCIe cables - Normal output is 9A = 108W or 54W / PCIe cable.

Because of the lack of PCIe cables and the rating of this PSU to handle 7x00 series SLI, I was only able to power a single 8800GTX card with the modular PCIe cables.  The non-modular PCIe cable ran to another 8800GTX while I used an extra PSU to power the other 8800GTX and a half in our Tri-SLI system.  We balanced the load as much as possible, although I'm sure the +12v4 rail is the one that had the most strain powering a single 8800GTX.

5v Measurement
5v Measurement
12v Measurement
12v Measurement

 

All of the rails managed to stay above their rated level and the lowest +12v rail dipped to a mere 12.1 even with a 620W load. The 3.3v line dropped to 3.28v, while the 5v line actually increased as more load was applied.  Click the chart below for full details.

Voltage
(Click chart for larger image)

 

The interesting thing I noticed with the FSP Everest 80Plus 700W PSU was the ripple.  When I examined the specs and saw that FSP has actually raised the acceptable noise and ripple from each line, I didn't have much hope that this PSU would deliver clean power.  Standard ATX specifications state that the 12v lines must not exceed 120mv while the 3.3v and 5v lines must not exceed 50mv.  FSP has lowered the bar and allows 140mv ripple on the +12v lines and 75mv on the 3.3v and 5v lines.  The +12v change of 20mv is not alarming but allowing 50% more ripple and noise on the 3.3v and 5v lines while "staying within spec" is very questionable.  With that in mind lets take a look at the noise and ripple measurement.

Ripple
(Click for larger image)

 

You can see that the FSP Everest 700W PSU has a lot more electrical noise that the 1200W Thermaltake Toughpower we've recently reviewed.  However, all 12v lines stay well with the real ATX spec, and don't require the relaxed FSP limits.  With a 380W load, all lines stayed within specs, but when the load was increased close to the breaking point of the PSU, the 5v line faltered a bit and hit 74mv ripple.  This is just under the FPS specs, but falls 24mv outside the ATX specifications.  Regardless, this didn't cause instability.

When we applied a load of 640W to the PSU it immediately shut off and partially corrupted our Windows installation as we were running a benchmark when the sudden shutdown occurred.  I'm sure that this is because the +12v4 rail is only rated at 108W normal usage and has to power a pair of PCIe 6-pin cables.  One an older gaming system this won't be an issue, but on a higher-end system, the PSU falls short of its 700W rating.

 

Conclusion:

While I was quite happy with the stable power, lower noise and ripple with this PSU, I was a bit dismayed to see that FSP has lowered the bar and relaxed the specifications for this unit.  That tells me that don't think this PSU can perform as well as it should.  Although it stayed entirely within the company's specs for their product, it still fell short in delivering us a full 700W of power in a well balanced system.  If we were to pull a bit more power from the Molex and less from the PCIe, I'm sure we could get 700W out of this unit, but the truth is the +12v rails that are rated at 9A "Normal" are too weak and are causing the issue.

Pros:

  • Looks good
  • Quiet PSU
  • Mostly modular
  • Provides ample power for older gaming systems

 

Cons:

  • 12v rails are weak at 9A "Normal"
  • Can't deliver full 700W
  • FSP has relaxed the specs so they stay within them

BCCRating

 

What FSP needs to do here is build a PSU with 2x 12v lines and make them heavier.  That way there would be less stress on smaller rated components if they chose to go with a couple of higher rated ones.  If this PSU had two 12v rails that were rated at 18A (normal) each, I believe it would do better than it does when configured as it is.

We've seen better PSUs, but we've also seen a lot worse.

I'd like to thank FSP for sending up this unit for us to review.  If you have any questions or comments, please feel free to post them in the forum at the "Comments" link below.