SPCR

This one's called Hipro HP-D2551AO O1LF.

http://www.80plus.org/manu/psu/psu_deta ... =43&type=2

On the outside, it looks remarkably similar to the Dell 255W units that scored the "Silver" rating a couple of months ago. That makes me wonder if Hipro was in fact the OEM who made them.

Can these units be bought anywhere?

I couldn't find it on sale anywhere, but Hipro models in general seem to be available at US retailers (Newegg for example). I hope it'll show up at some point.

yeah me to. 255w is perfect for a server

Delta follows with a 255W unit that also passes the "Gold" requirements.

Delta DPS-255EB A

http://www.80plus.org/manu/psu/psu_deta ... =27&type=2

Looks like both power supplies might use the same electronics. At least, the numbers and test results are virtually identical.

But damn, I want one of those! This is ideal for a low-powered PC. For a PC consuming about 30W (DC), this would save you 3 to 4 watts (AC) compared to a VX450 or similar PSU.

Looks like both power supplies might use the same electronics

Both look to have substantially different cable layouts, not to mention that both Delta and HiPro are well known as two different manufacturers-- the HiPro one's configuration looks identical to what Dell uses in their Optiplex GX620/745/755 mid-towers actually, down to the mounting holes for the cable clips. Things that make you go HMMMMM..

line wrote:Delta follows with a 255W unit that also passes the "Gold" requirements.

Delta DPS-255EB A

http://www.80plus.org/manu/psu/psu_deta ... =27&type=2

I see Antec have stopped using Seasonic to build their PSU's and are now using Delta. Maybe Antec will be releasing a version of the 255w.

This is fabulous!

What's truly amazing about these is that they are not 500W+ units where 20% load is 100W. They are half that rating and achieve 88% efficiency at just 50W output. That's really impressive. It's happening much faster than I thought it would.

Yeah, it's impressive. And I'd really love to have one myself. But where can you get those silver/bronze rated <300W PSUs. I've been searching for a long time and I can't find a single retailer.

Did some asking around in the PSU circles. It turns out that this Delta is actually for HP. When it will be implemented and in what product, no idea. I have some feelers out to HP.

Any luck in finding the Delta 255? I am building a low power WHS system and this would be ideal for it.

Had a look at some of HP's current desktops, currently they have a 240 W PSU rated for 85 % efficency according to Energy Star/EPEAT's GOLD standard, dunno what that means.
My guess is that HP want to get the 80+ GOLD rating as well, so they will replace the 240 W with the 255 W model in either this or an upcoming model.

It should be pretty easy to find them when they show up. There aren't many models that only get a 255 W PSU and still uses the ATX standard, you can exclude most SFF and high end systems. Then search the quickspecs for "255".
HP have sent desktops to SPCR for review earlier so I think they would be interested to do it again, especially since they have a thing for getting all those efficency/environmental awards.

More Hipro units pop up...

HP-305WA001-LF: 300W, "Gold", custom form-factor.
HP-D2351A0: 235W, "Silver", ATX12V
HP-D2553A0: 255W, "Silver", ATX12V

http://www.80plus.org/manu/psu/psu_deta ... =43&type=2

I also caught a glimpse of a Seasonic "Silver" 550W PSU. Model name was SS-550LT with an average efficiency of 90 percent, but it's not there anymore.

Any news regarding these very high efficiency units?

Seasonic goes gold. ^^

Wow, it was only what seems like 5 years ago that your OEM Dell's and HP's came with such junk power supplies that they were only 50-60% efficient. Now we're hitting 90% even. Looking at the loss side, losses decreased from 40-50% to as low as 10%. From here, even doubling efficiency only drops the loss from 10% to 5%, so the low hanging fruit, so to speak, has been plucked. This easily puts the pressure back on video cards and CPU's, and eventually even chipsets. Good to see the pressure to drop power usage continues all around.

Hramm wrote:Seasonic goes gold. ^^

those don't , um , don't look like sub 300 watt PSU's to me.

No they're not 300watters, and I doubt we'll seem gold 80+ ones any time soon. But the 550W model tested 87% at 113W -- that's excellent. It'd be interesting to examine the curve below that. It might just hold up >80% to 60W. A 400W model would be better tho.

It would be nice to see a Seasonic SS-550LT in a review here. And if possible, exactly that model, SS-650KM and SS-750KM are overkill anyway.

I don't think the seasonic gold models will be on the market any time soon. Maybe 6 mos?

Hi!

I looking some high eficiiency psu.
See the reviwe
http://www.tomshardware.com/reviews/Ath ... 036-9.html

But it's hardly to get in my country.

Any ideas where get low power but high efficiency psu??

Bump this "searching 80 gold under 300w" thread.

I think, that delta is sure in new Dell Optiplex 760 and 960 rated 88 efficiency for 255w and 235w.

I will searching if is possible bought only this psu.

links>

Power supply 85 plus in Optriplex 360
http://www.dell.com/content/products/pr ... =bsd&cs=04

Power supply 88 plus in Optiplex 760 or 960
http://www.dell.com/content/products/pr ... =bsd&cs=04

I found the best choice. Not gold, but high efficiency about 85% ~ 50w
Fortron FSP-250-60GHT


http://www.watt-power.co.uk/catalogue/w ... p-351.html

In stock.


Pdf from 80plus.org
http://www.80plus.org/manu/psu/psu_repo ... Report.pdf

ex.treme wrote:I found the best choice. Not gold, but high efficiency about 85% ~ 50w
Fortron FSP-250-60GHT
...

Wow, that's an interesting PSU. Only 80plus as it misses the 82% at 100% load for bronze. But then it matches the bronze level at 50% load and silver level at 20%. Great for a low powered PC.

Hi, just wondered as that is a TFX12V power supply, is there any way of getting it to work in a standard ATX case and will it work electrically with an ATX12V motherboard?

Any advice would be greatly appreciated, looking at building a low power workstation. If i need a TFX case could somebody please point me to one!

Thanks

xenos wrote:Hi, just wondered as that is a TFX12V power supply, is there any way of getting it to work in a standard ATX case and will it work electrically with an ATX12V motherboard?

Any advice would be greatly appreciated, looking at building a low power workstation. If i need a TFX case could somebody please point me to one!

Thanks

Generally, the only real difference between TFX and ATX (and SFX, BTX, etc...) for PSUs is how they mount to the case. As TFX is smaller that ATX, you could fit it in most any ATX casse, you'd just need an adapter plate. I don't see any from a quick search. But it wouldn't be too hard to make. Electrically, the differences are minor if any. Especially if you're talking a low power system.

I'm not 100% sure but the PSU in my Antec NSK1480 looks very similar to the same size as this. It's a nice case.

The 80 Plus website is interesting, and I made the following list for myself:

Fortron FSP250-60PFK
Hipro HP-305WA001-LF
Delta DPS-255EB A
Hipro HP-D2551AO O1LF

Sorted by how interesting they are. I'd prefer the Fortron. These really make sense, heat that isn't generated in the first place does not need to be blown away by noisy fans. But I'm afraid none of these PSUs can be bought anywhere in Europe. Will they ever be available here?

Welcome to SPCR W3ird_N3rd

That is an interesting point you make about fans. Does anyone know if these power supplies are tested with or without a fan? What I mean is that at 20% that Fortron PSU managed ~89% efficiency with a 115V current. Sure a fan doesn't use 6w, but it may well use 1w (I've had fans rated at >4w...) and a 1w decrease would push this power supply to >90.5% efficiency... Then I would plug it in to a 230V wall socket here in Sweden

Tobias wrote:Welcome to SPCR W3ird_N3rd

That is an interesting point you make about fans. Does anyone know if these power supplies are tested with or without a fan? What I mean is that at 20% that Fortron PSU managed ~89% efficiency with a 115V current. Sure a fan doesn't use 6w, but it may well use 1w (I've had fans rated at >4w...) and a 1w decrease would push this power supply to >90.5% efficiency... Then I would plug it in to a 230V wall socket here in Sweden

I don't think it would even be 1W at a 20% load, at least if it has a good fan controller in it. There would be very little heat generated so the fan should be at a minimal speed. An old Panaflo 80mm fan is rated for 0.1A at 12V which is 1.2W. At 12V, it's moving way faster than any good PSU should be running it's fan at a low load. So I would guess no more than 0.5W max at lower loads could be attributed to the fan. That's just a guess without actually doing any measurements of course.