300W to 450W: 20 Power Supplies on the Test Bench
by Christoph Katzer on December 31, 2008 6:00 AM EST- Posted in
- Cases/Cooling/PSUs
Cooler Master eXtreme Power Plus 390W
Cooler Master would've never thought about sending us a unit like the eXtreme Power Plus 390W, which is why we got this sample from other sources. It is unfortunately a 230VAC unit only. It comes with passive PFC (no universal AC input), a decent looking grey exterior, and an 80mm fan. We thought it might be a good idea to include it as well since we have several other similar products lined up today. The casing is very simple and the fan grille is cut directly into the metal.
When a power supply has passive PFC, there is always one problem for the designer: where to put the huge passive PFC coil. In this unit they put it on the side, which was possible because the unit slides open to the back. However, it isn't the best location since now most connecting cables need to go through half of the inside above the heatsinks for example. Teapo makes the caps, which is maybe a good choice for this kind of power supply. The eXtreme Power Plus is the only power supply in this roundup that didn't survive the testing since it gave up at 80% load. Good that out Chroma has safety functions that are preventing damages to the equipment but a PC system would have probably not survived at this point.
Buyers of this power supply can expect a short main ATX cable harness and a 55cm long 4-pin 12V harness. That's almost the same as what we saw with both Real Power Pro units. The eXtreme Power Plus comes with two SATA connectors and five Molex connectors, and the cables aren't sleeved. Obviously, this is not a high-end power supply, so the lack of a PEG connector is not surprising.
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Origo - Monday, January 12, 2009 - link
How can Silverstone Element ST40EF 400W get so good score on quietness and efficiency compared to Silverstone Element Plus ST50EF-Plus 500W?This (SPCR) review says Silverstone Element Plus ST50EF-Plus not that quiet or efficient:
[url]http://www.silentpcreview.com/article670-page1.htm...[/url]
7Enigma - Wednesday, January 7, 2009 - link
Could you comment on this PSU? I know you have a 500 and 550w article coming up but an incredible deal ($25 after rebate) came up on this PSU and I'll snatch it up for my build if it's good.Thanks.
Markstar - Wednesday, January 7, 2009 - link
As usual, thank you for your interesting review and the effort you surely put into it!Greetz from P3D!
yehuda - Sunday, January 4, 2009 - link
This is the kind of article I like to keep in my favorites and refer people to.Noya - Saturday, January 3, 2009 - link
I skimmed through, but I didn't see what type of set-ups you'd recommend for this class of PSU.So, I'll post what I'm using with a Corsair vx450:
Q8200 @ 3.3ghz (475x7)
8gb Ballistix DDR2-800 cas4 @ 475mhz (4x2gb)
Evga 9800gtx (stock clocked for now)
Gigabyte P-45 UD3P
3 x 7200rpm sata disks
2 x DVD/RW
3 x 120mm fans
It's been running fine for almost a month now (thanks MS for the 30% eBay cashback lol). I previously used this vx450 in my first build (s939 Opteron/7600gt).
OddJensen - Monday, January 5, 2009 - link
The VX450 is a pretty good PSU and under optimal conditions you can probably draw more than the max. rated wattage (450W @ 50C ambient). Though personally I like to go with a bit more headroom taking future upgrades into consideration.kenyee - Friday, January 2, 2009 - link
That's another way to group the power supplies.That's one reason I still use Enermax Liberty power supplies...they're a nice small size for HTPC's and the modular connectors are important when there isn't much space. Using this affects power efficiency which is probably why the highest efficiency ones don't use them...
proci - Thursday, January 1, 2009 - link
its a very nice test, i like it. i miss some words from the ripple side, they could be useful to those, who don't want to analyze so many graphs.i have an FSP 500 GLN60 (active pfc, smooth oemgrey color:D), i wanted a BS2, but the two seems to be identical to me (ok, it only has one 6pin connector). and i'm out of connectors (6molex, 4sata... with 7 HDDs/opticals, 2 fan controllers and only one video card). so having many connectors is a good thing, although you can buy molex duplicators (only downside is they cost money). and its still more than enough to power my system (q6600@3.0, hd3870, lots of vents, hdds...).
and most of the computers are fine with just 200-300W. its a shame, that there aren't that many good PSUs on the low edge, because having a monster of PSU means you will have bad efficiency in idle with most of the computers. ofc you can build a computer, which eats up 1000W, but besides skulltrail its hard, and mostly needs enthusiast end water cooling/compressor for cooling purposes.
and having a good PSU is like having good safety in your car: you only notice it when it fails, but then it is already too late. and buying a noname PSU means that you playing russian roulette all the time...
Martin84a - Thursday, January 1, 2009 - link
I find it weird people keep recommending Sea Sonic. I'm currently loojing for a new PSU in the 500-600watt range. I remember toms 24 hour PSU stress test, where Enermax, Zalman, Cooler Master and Silverstone where the last remaining, while Seasonic had failed with the rest.http://www.tomshardware.com/de/stresstest-netzteil...">http://www.tomshardware.com/de/stresste...etzteile...
I just read Hardocps Seasonic S12II-500 watt psu review, and the transient load test showed awful results.
http://hardocp.com/article.html?art=MTM2NCw3LCxoZW...">http://hardocp.com/article.html?art=MTM2NCw3LCxoZW...
Think computer showed a lot of undervoltage ripple too, and on the 12v a lot of switching between overvoltage and undervoltage. That doesnt look good.
http://www.thinkcomputers.org/index.php?x=reviews&...">http://www.thinkcomputers.org/index.php?x=reviews&...
And i have read about the DOA Seasonics too, and the ones failing after some time...
Seasonic also only provide 3 years of limited warrenty here like many other places, while a brand like Cooler master give 5 years, just like Corsair.
Just makes you wonder.
I think i'll go with an Enermax modu+ or pro+ this time..still not sure though.
sprockkets - Sunday, January 4, 2009 - link
Hmmm... your first link is to the german side of Tom's, and while we can make out perhaps the SeaSonic PS failed, searching the English side for the same article does not yield a proper counterpart, and the article that comes close to it, is not even finished and broken. What does that say about Tom's Hardware?Your second link does show some iffy parts, but overall, they recommend the power supply and dismiss the transient load results as not important. Btw, you think a computer motherboard is going to fry because the 12v line varies 0.2v? 4.92 volts is bad? Those voltages can vary 10% on the 12v line and 5% on the others and meet Intel's ATX spec. Welcome to the real world of imperfection.
Three years vs 5 years, so what? My FSP power supply in the thrid computer I've built in 2001 still runs fine, and it came with only a 1 year distributor warranty. In fact, only 1 out of 10+ FSP power supplies died, and it probably died because the power strip blew.