"POWER PC" ML915 350W power supply

[momaka]

Re: "POWER PC" ML915 350W power supply

+12V rail: Slowly fluctuating between 11.99V and 12.00V; ~100mV of ripple
+5V rail: Constant 5.10V; ~40mV of ripple

Not bad at all, especially the voltage regulation. I would actually trust it too, now .

[Newbie2]

Re: "POWER PC" ML915 350W power supply

Some pictures of this "POWER PC" ML915 power supply in its current form (sorry, they're not the best quality):


Slightly-blurry overhead shot of the overall PSU internals.


The two United Chemicon SMG 560uf 200V primary caps.


The transient filtering stage components I installed.


I replaced every single cap in this PSU with Japanese caps; the small Panasonic caps are visible in the area where the transformers are.



Two pictures of the secondary side caps.


The open power supply, with the computer in the blurred background.


A picture of the PC internals that this PSU is now in.

[Newbie2]

Re: "POWER PC" ML915 350W power supply

Sorry to revive an old thread, but I've got more news on this power supply.

I finally have a decent PC setup to install it in (after a year):
Intel Core i3-540 3.06GHz dual-core processor (Socket 1156)
8GB ADATA Gaming Series DDR3-1600 RAM (4x2GB dual channel)
Intel DH55HC motherboard
GIGABYTE AMD Radeon HD6570 1GB GDDR3 PCI-Express x16 2.1 video card
1TB WD Caviar Green WD10EAVS SATA-II Hard Drive
"POWER PC" ML915 350W Power Supply

With this PC at a constant 100% CPU load from Prime95, the output voltages and ripple of the +12V and +5V rails were measured. The voltages were measured with a digital multimeter, and the ripple from both outputs were measured with my father's ancient Hitachi V-1060 100MHz oscilloscope.

+12V rail: Slowly fluctuating between 11.99V and 12.00V; ~100mV of ripple
+5V rail: Constant 5.10V; ~40mV of ripple

Based on my voltage and ripple measurements, along with the fact that I added and upgraded some of the key components in this power supply (input filtering components, ball-bearing fan, all Japanese caps, better +12V rail silicon), I would say this power supply can safely power the PC it is now in, since they are within Intel ATX specifications. While this PC cannot load this power supply to its limits like a proper PSU load tester could, I am only concerned about this power supply safely powering a lower-end PC.

[PeteS in CA]

Re: "POWER PC" ML915 350W power supply

The holes for mounting to the computer case, yes. But I was referring to the screws and snap-in slots that hold the P/S case together, which the P/S mfr can design to suit their cost/process structure.

[b700029]

Re: "POWER PC" ML915 350W power supply

All of them copy case designs from each other. The same-looking case doesn't mean much.

(There's not much point in being creative here. It has to fit the ATX spec anyway.)

[PeteS in CA]

Re: "POWER PC" ML915 350W power supply

Seems plausible, N2. I'd suggest looking at the locations of the case screws and snap-in retaining slots. If they match, that would support the idea that that Chinese company is the actual mfr.

[Newbie2]

Re: "POWER PC" ML915 350W power supply

I believe I may have found the manufacturer (or at least another distributor) of this power supply.

They are known as "Guangzhou Minglong Computer Equipment Co.,Ltd", and one example of their PSU is here: http://www.chinaypages.com/sampleroo...pply_300W.html



This "Power Train" PSU has a 120mm fan on top, however the label style is the same as my POWER PC 350W and c_hegge's Sky 550W. I know that the labels can all come in many different colors and generic logos, however the "ML" in the model number of these power supplies might be linked to the "Minglong" part of this Chinese company's name. This "Guangzhou Minglong" company has a website in English here, with their brand as "Power Train" like in the PSU shown above: http://www.mlpowertrain.com/index.php

Also, in the specifications on the 300W PSU product page that I linked, the power supply shown is a "ML-300W", however "(ML915-5)" is shown underneath that on the page. A very small marking on the back of the PCB of my POWER PC 350W has "ML915-3", so these could be related.

For comparison with my POWER PC 350W PSU, the only picture of an 80mm fan PSU I could find on their website was a 200W model:


I know that isn't the biggest or clearest picture, but judging from that, the visible casing on that looks almost the same as my POWER PC 350W, the only differences being that my PSU does not have an on/off switch and the Power Train PSU does not have an input voltage selector.


What do you think guys?

[Newbie2]

Re: "POWER PC" ML915 350W power supply

Interesting how Jun Fu and Fuhjyyu seem to be related.

Anyway, I just placed a $25 CAD order with Digikey.ca to get the remaining caps to make this POWER PC 350W PSU have all reliable Japanese caps. Two UCC 560uf 200V primaries, along with a few Panasonic FC 47uf, 10uf, and 4.7uf caps to replace the small often-neglected caps.

[Shocker]

Re: "POWER PC" ML915 350W power supply

So perhaps Jun Fu made the caps that went into those #$@%!^& Antecs???

[Rulycat]

Re: "POWER PC" ML915 350W power supply

It's entirely possible Jun Fu and Fuhjyyu make each other's caps. One makes all of the high voltage, the other Low ESR, etc...

[Shocker]

Re: "POWER PC" ML915 350W power supply

Thanks

Fuhjyyu S5 and Jun Fu SK are identical.

Included modified table

[Scenic]

Re: "POWER PC" ML915 350W power supply

I haven't been able to verify Jun Fu SK, since their site is broken and I get the SL datasheet instead

there you go:

[Shocker]

Re: "POWER PC" ML915 350W power supply

I actually suspect Fuhjyyu and Jun Fu are related, even though I haven't found any mention of it on their sites.

[Shocker]

Re: "POWER PC" ML915 350W power supply

The 2200uF 6.3V 8mm CapXon KF doesn't appear in the datasheet either. Custom sizes. Very common in PSUs. The only Japanese caps with a 2200uF 16V 10mm are Panasonic FK. Nichi HM or Panny FJ for a 2200uF 6.3V 8mm.

[Scenic]

Re: "POWER PC" ML915 350W power supply

CapXon KM is General Purpose, so it's zero surprise that they failed.

I just took a look at a FUBAR'd E5 .. it's KF, not KM (wasn't quite sure when I posted earlier). Multiple 16V 1000uF (8x20) and 6.3V 2200uF (8x25) plus a few small ones on 5VSB (including a microscopic 25V 100uF)
The Teapo is a 16V 2200uF (10x25) SD series. That's an obsolete series, but it has a 2006 datecode.. and it doesn't appear in the last published datasheet (from 2000) O.o

[Shocker]

Re: "POWER PC" ML915 350W power supply

Something just came to me. Jun Fu WG = Fuhjyyu TM, and Channel Well used Jun Fu in the past. So it's perhaps possible that there could have been Antec StupidPowers and TroublePowers with Jun Fu WGs. I think the Fu in Jun Fu stands for Fuck up.

[Shocker]

Re: "POWER PC" ML915 350W power supply

I forgot to mention that the psu maker used either Capxon KM or JunFu WG (10mm 3300uF 16V for 12V and 10V for 3.3 and 5V). Just out of curiosity, is Junfu WG a lower esr series compared to Capxon KM?

Yes it is. Jun Fu WG is a low ESR series with identical specifications to Fuhjyyu TM . CapXon KM is general purpose as mentioned above.

[goodpsusearch]

Re: "POWER PC" ML915 350W power supply

I forgot to mention that the psu maker used either Capxon KM or JunFu WG (10mm 3300uF 16V for 12V and 10V for 3.3 and 5V). Just out of curiosity, is Junfu WG a lower esr series compared to Capxon KM?

[Shocker]

Re: "POWER PC" ML915 350W power supply

I can confirm that in psus that used both Teapo and Fuhjyuu caps the Teapos survived.

Same with psus that use Teapo and Capxon...

JunFu caps used in identical psus with ones that used Capxon KM/KF didn't bulge, while the Capxons always did...

CapXon KM is General Purpose, so it's zero surprise that they failed.

If you're talking about the 2200uF 6.3V 8mm KFs, maybe it's just that those caps are especially bad. For replacing them:

• Nichicon HM or Panasonic FJ are overkill, but have a 2200uF 6.3V 8x20mm.
• Or you can attempt to squeeze in a typical 2200uF 6.3V 10mm (not easy).

[goodpsusearch]

Re: "POWER PC" ML915 350W power supply

I can confirm that in psus that used both Teapo and Fuhjyuu caps the Teapos survived.

Same with psus that use Teapo and Capxon...

JunFu caps used in identical psus with ones that used Capxon KM/KF didn't bulge, while the Capxons always did...