Topic: Everything you need to know about HP 1200W server PSU DPS-1200FB (Read 613 times)

It is now more than a year since I opened this post, so here are few more experiences.

1. One PSU died on me because i was constantly cycling the power (like hundreds of times). After it happened to me, i learned that if the rig has an issue, visit the actual rig and fix in place instead fucking it remotely

2. Tried to reverse cooling fan flow direction. When loaded PSU with 1200W of load, it shut down few minutes later on over temperature. Fan didn't speed up, because when reversing the flow, you are screwing up with temperature sensor that relies on correct air flow direction

3. Difference between PD11 and PD19 is about 30-50W of power which they take from the wall, when loaded to the maximum

4. I had many of these PSUs working in overload (1350-1400W from the wall) and while they sounded like SpaceX rocket launch, they never failed.

5. When used with Octominer board (minin riserless board) I used 2 PSUs in parallel. One was powering 4 Vega, and other 4 Vega and a motherboard. There were no issues and system works perfectly like that, but i noticed that plugs that power the motherboard heat more than usual. Maybe due some voltage differences there are some currents flowing where they should not. I now use 3 pcie cables to power the motherboard. Already working like that for half a year on 4 rigs.

Overall, I love these PSUs. Small, powerful and efficient, perfect solution for rigs with mining motherboards that can be powered only by pcie cables.

Thats overkill alot!  You can more then feel safe with 1x6 pin to 8pin x2 for 1 1080ti . So yeah one cable per  8 pin and you are set
Just dont use those sata connectors for risers. Happy mining.

I don't know if it is allowed to post links, but here it is

I copied the link from my app, ot reroutes to ebay.co.uk for some reason, but the boaed itself is from china

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F372386003892

Hi, great info, I really appreciate it.
Im having trouble finding the 17 port breakout board, do you have a link please?

Hi there!

I bought on ebay pci-e cables that are 6p on one end (This plug into the breakout board of PSU) and 6p+2p on other end (this plug into your GPU or wherever you need them)

I am using 2 cables per GPU and never had any issue. But I did screw up when i connected only one cable to power my Octominer mining motherboard, and then the plug burned, now i am using 3 cables to power the motherboard.
I use 17 port breakout board from ebay, these work great for me, and the one with 12 port, i didn't like so much, i think the connectors on them are not as good as on 17 port.

If you don't mind the noise, powering 6 vegas (optimised, of course, not at default settings where they pull 300 watt each) is easy with this PSU. Now my rigs are 8 GPU, i just use 2 1200W PSU, one powering 4 vegas, another 4 vegas and a motherboard, and that works nice for me and PSU is not as noisy as working with 6 vegas.

if you connect 2 separate PCI-e cables for powering the Vega (actually, vega will not work with one cable, both must be plugged) you will not have issues with burned connectors or instability. My only fuckup was that, powering a mobo with only one cable, and that was on 12-port breakout board and the plug burned. I think it was the plug fault on breakout board, not the cable itself.

cheers! Smiley

Thanks for the detailed info.
I currently use, just to play it safe, a coupler cable which goes from two 6 pins into a single 8 pin, so on a single HP 1200w server power supply and a 12x6 breakout board, I can run a maximum of 3 1080 Ti's (which require two 8 pin's each), as this would then require four 6 pins per 1080 Ti. Is this overkill? Or could I safely do away with the dual 6 pin coupler to single 8 pin, and just use a single 6 pin to 6+2 cable into each 1080 Ti 8 pin port?

A 6-pin can handle more then 75 watts of power. For example if a 6 pin were restricted to 75 watts then we would be getting  2.08A per 12v yellow cable 2.08*3*12 = 75 watts , but awg 18 are able to deliver up to 10A per yellow under optimal circumstances  , so theoretically  10*3*12= 360 watts.  But thats the cable then we have the terminals..

Standard terminals are rated for 8amps then  there is HCS terminals that are rated for 11amps and Plus HCS terminals 12amps

so with a 6-pin pcie  with 2*8*12= 192 watts from 6 pin pcie 18awg
               8-pin pcie with 3*8*12=  288 watts 8 pin pcie 18 awg   

So 6 pin 75 watts of power rating are vastly underrated.

A bit more info about the internals of the subject here https://github.com/raplin/DPS-1200FB

Should mention these are rated for 1200watts on 220/240v and only 900watts on 110/120v lines.
I have had several over the years.  My last was connected to a 255v feed for over a year with no issues.  Very durable and compact little buggers.

Hi, great post. I am interested in the cables, connections, etc. The board connectors are only 6 pin, but your Vega 56's are two 8 pin? Are you using a single 6 pin cable to 8 pin, so two cables for each Vega 56? I have read so many differing opinions on how many watts a 6 pin cable can take and what an 8 pin plug requires, etc, so Id be very interested on your take on this.

Kind regards.

You don´t need a ATX power supply. You can use a pico psu for the mainboard. There are also breakout-boards avaible.

Great post,

I would be interested in a more detailled breakdown of your sonoff solution (model, wiring, what you use for remote, and so on)

Cheers.

It's loud as fuck. <600W is quiet, 700-800W load is tolerable, everything above that sounds like a jet engine.
I wouldn't use it in a living room.

Hello! Thanks for your input, a valid one for sure as I saw plenty things destroyed by heat. There is enough air being sucked from the fans, that all the surrounding is actively cooled, basically everything is ambient temperature. I have a thermal camera and basically the only things that heat up is the GPU core. Cpu, cables, capacitors, motherboard, everything stays at ambient.

Everything is looking fine and clean however as an IT I want to stress out that you have your cards "too near each other" risking the temperature of the cards to go really high.

I maybe wrong but I don't see any dedicated cooling fans to the card. As you know heat makes the life of any electronic products shorter. I have learned this in my CompTIA A+ certification a few years ago.

My first merit. Thanks!!

If you sleep in the same room as your rigs, I recommend you stick with the PSU you are using now. If not overloaded, the HP server PSU is not so much loud, but it is loud for sleeping. Also, when you just start your rig, the HP PSU will slowly ramp the fan speed up until really loud, and then regulates back to normal, but this ramp will for sure wake you up. Unfortunately I don´t have the video, I am away from my rigs for next 20 days.

Do you have any video or any recorded sounds of this PSU I honestly didn't know the actual sounds of any server PSU I always use corsair ATX psu for my mining rigs because this PSU sounds is just like the same as gtx 1080ti super jetstream.

Do you think that this PSU is not too loud because all my rigs are in my own room and I don't like to sleep with annoying sounds?

Great post! Thanks for sharing bud

Merited for good writeup + +