Final thoughts, HEXUS.awards, HEXUS.where2buy, HEXUS.right2reply, related reading
All the
PSUs we tested were EPS models and 10mm - or more
- deeper than a standard ATX power supply. We've said it
repeatedly already but, just in case we didn't say it clearly enough -
they may not fit into your ATX case.
However,
those of you with
modern cases may not have problems. But, check carefully
before buying to avoid expensive egg on your face.
The Enermax Galaxys are far and away the
biggest of the PSU
under consideration and they're also the only models to use a
fan
larger than 80mm. Each combines a 135mm intake fan with an 80mm
exhaust and the result is cool and quiet running.
In
stark contrast, Tagan's
strategy of using a pair of 80mm fans in a push-pull
configuration is loud and, thus, outdated.
And, not
only
is the Tagan loud, the noise is
especially unpleasant - the whiny tone
is hard to live with. But, as far as cooling goes, the
twin-fan arrangement is actually very effective.
In
terms
of fans, the SilverStone Zeus PSUs were the worst
offenders. Each uses a single 80mm intake fan and that proved
to be loud and whiny.
All five power supplies were able to meet or marginally exceed their rated power, given the loads we applied. Clearly, there's not much to complain about
anywhere as far as the stated power is concerned.
The best wiring was on the Enermax PSUs - both
of which are
almost fully modular. The kilowatt version allows you to power
a
staggering number of SATA drives - 18 in all
- without even
resorting to splitter cables. With support for only three fewer drives,
its less-powerful stablemate isn't lacking in that direction either.
There
was also some useful cabling on the two SilverStone models.
The
750W version has a mass of adaptors, while the 850W version has each
cable run labelled so you know what rail each wire is connected to.
All
of the supplies on test had at least some partially-sheathed cables.
But the Tagan 800W distinguished itself by the copper shielding on its
EPS and PEG cables - and then went further by adding an RF
choke to the latter.
An interesting spread of features, pros and cons then. Hopefully, they'll help steer you in the right direction, dependant on what's most important to you.
HEXUS.certification
The
idea of HEXUS.certification is to confirm that a product tested does
what it's supposed to do. It's not an award, merely a confirmation that
a product is fit for purpose.
We were distinctly unimpressed by the fan-noise on the two Silverstone Zeus PSUs. A PC power supply, especially a modern one, simply
shouldn't be noisy - and definitely not that noisy.
Nonetheless, the Zeus PSUs did what we asked of them - though we're a
bit surprised that they could hear our requests above their own racket.
The Tagan
Dual Engine 800W also did pretty much what it says on the
tin, so that model, too, merits certification even though it's in the same noise-league as the Zeus PSUs. The noise, though, is a bit more understandable - the Tagan has two fans and they providing more cooling for the same noise level than the SilverStone PSUs.
And
that leaves us with the 850W and 1000W Enermax Galaxys to
consider. We didn't see (or hear) anything to disbar either model from
certification. These are powerful PSUs that pretty much do what's
claimed for them and do it quietly. They also have the advantage of
being largely modular, allowing you to keep clutter to a minimum by
attaching only the power feeds that are needed.
Enermax Galaxy 850W
SilverStone Zeus 850W
SilverStone Zeus 750W
Tagan
Dual Engine 800W
HEXUS.awards
So, did we find any PSUs that stand out from the crowd? Yes, the Enermax Galaxy 1000W is the undoubted star of the show, as well it should be at
that mind-boggling £224 price-point.
This PSU
is better in almost every regard than the models it went up
against.
If we needed an ultra-powerful
PSU, this giant is the one we'd be most happy to
install (assuming it would fit, of course!). It's also
the one we'd expect be able to live with most happily.
The
price is extreme but so is the performance. The Enermax Galaxy 1000W is
what we'd recommend. But if you don't need quite that much power, you'd be fine with any of the PSUs we've examined today, assuming you're happy with the feature-set and the specific foibles we've described.
HEXUS.where2buy
Enermax Galaxy 850W - £165 from
SCAN
Enermax Galaxy 1000W - £224 from
SCAN
SilverStone Zeus 750W - £110 from
SCAN
SilverStone Zeus 850W - £152 from
SCANTagan
Dual Engine 800W - £114 from
SCAN
None of the prices above includes delivery but that's free
from
SCAN if you're a regular poster in the HEXUS.community.
HEXUS.right2reply
At HEXUS, we invite the companies whose products we test to comment on
our articles. If any company representatives for the products
reviewed choose to respond, we'll publish their commentary here
verbatim.
HEXUS
related reading
HEXUS.net -
PSUs
- all reviews and newsHEXUS.net
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reviews
::
600-700W
PSU shootoutHEXUS.net
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reviews
::
400-500W
PSU shootoutHEXUS.net
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reviews
::
Akasa
vs FSP - 500W PSU shootoutHEXUS.net
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reviews
::
FSP
Group Booster X3HEXUS.net
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features
::
Deep
inside FSP Group - what a reputable PSU-maker does to ensure it won't
electrocute you
HEXUS.community :: your right2reply
What you really need for a thoroughly-modern, high-end PC with twin graphics cards is a PSU able to put out 750W or more.
I don't agree with this, nor the front page link which says:
A high-end PC with twin graphics cards needs a PSU able to put out 750W or more, simple.
This sounds like scaremongoring from Hexus and isn't the high quality journalism I usually expect. By all means test this category of PSUs, but at least be honest and show us such systems real power draw and the need or not of these kind of supplies.Quote
I believe the answer to the abnormal temperature readings on the Silverstone (high wattage Etasis in general) units lies in the very high switching frequency employed (say 100-150 kHz?). As you all probably know, there is a trade off between using higher switching freq (necessitates the use of smaller components) and the resultant EMI.
What you may have here is an EMI issue which is interfering with your temperature probes (especially if it is some kind of IR/RF probe). You can probably drop a 10x probe in there and see what kind of junk EMI signals it picks up on?Quote
Ive had 3 of these, including the current DXX version, and the fans are quite loud at idle, and under heavy load, and a full speed, they are insanely loud. Its more of a powerful whooshing of air, and I have to say that it doesnt bother me, but for people buying a PSU, they should be aware of that :)
I also had a Tagan 700W dual engine, which was fairly quiet, until both fans stuck on full, and did exactly what you describe, maybe you had a duff one as well?
Edit: I should also point out that it is very difficult to make the Galaxy's fans spin up under load, but when they do, youll know about it!Quote
Reply