HP DPS-1400CB A flex slot SMPS PSU
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- Опубліковано 11 лют 2025
- 1400w 117A @ 12v HP flex slot power supply PN: 733428-101.
My video shows how to power the unit on, and it running at 14v with no over voltage protection bypass.
With the PSU orientated with the gold contacts facing you and the 10 pins to the left, firstly connect pin 1 and 2 together, they are the farthest left and are the 2 shortest pins. I wasted a long time trying to turn the unit on with a 1k resistor, it would not work and I recommend just shorting them, you might be able to install a switch however the psu will automatically power on when the AC input is applied.
Secondly you will need to install a 1k resistor on pin 3 and ground. Any point on the metal case is ground, as is the large middle gold contact, or the long middle finger on the opposite side. I recommend you make sure its out of the way, secure and insulated so it can't potentially short on anything. I believe that pin 3 had 3.02v on it before I grounded it.
If you open the case, there is a vertical PCB that runs along the side and on it there is a very small pot facing outward. Turn it clockwise to increase the 12v output voltage, anticlockwise to lower it. I connected a 25K ohm resistor to the pin on the right of the pot and ground. This dramatically raised the minimum voltage and my maximum voltage is now over 14v, however going too high will shut the PSU down, it has a over voltage protection. I will look into removing the OVP and also determining other pins such as Vsense for vdroop sag compensation and parallel PSU usage in the future and hope to update with another video.
The PSU is tiny, has Platinum efficiency rating, and could theoretically smash out just about 100A into 14v. It can be used to power Ant miners, other Bitcoin ASICs or any GPUs, if you make your own PCIE cables, it could power huge LED arrays, CB radios or other car audio or any other very hungry 12v device, or even charge a battery! Google how much a 12v 100A charger would cost! 🤯
Breakout boards are now available! 🎉✨ Search eBay, AliExpress etc for any of the part numbers on the PSU such as HP733428-101 or 720620-B21 or 830272-B21 There is a company called "Deep In The Mines" that also sell them. I will be ordering one from China and might make a video on it. I'm on the hunt for a few more of these PSU's for a cheap price, to replace my 4x DPS-1300BB B model units right now to reduce size and weight and gain that mad efficiency.
*Copied from the video description, which was written when the video was uploaded, and has always been there, available to everyone*
If you open the case, there is a vertical PCB that runs along the side and on it there is a very small, metal potentiometer facing outward. Turn it *clockwise* to _increase_ the 12v output voltage, *anticlockwise* to _lower_ it. I connected a *25K ohm* resistor to *the pin on the right of the pot* and *ground* 14v is now possible, however going too high will trip *over voltage protection*
Thanks for the video got them working, using them in series to get
24V to charge lipos ,had to take one apart to break the negative connection ground from the case
This is done by replacing one of the screw with nylon and a nylon washer between the board and metal case
screws toward the tabs
So u made a Floating Ground but the Case is connected with Main Ground for Safty?! I wanna do that do now because the 1200w PSU are way to expensive.....
Is it the screw close to the AC input socket?
To activate the PSU it is enough to connect Pin 1,2 and 3 together. Pin 1 is GND, too. The 1k resistor is not necessary.
i'm about to do the same, i'd be really interested in knowing how your charger is performing and if you've had any issues. thanks
@@Henning_Rechso what your saying is just soldering pins 1,2,3 together works fine? No resistor needed like the video shows?
Just bought one, this has been a huge help.
thank you for figuring this out. The internet has provided no results for the pinout.
very good video thanks. can you tell me where to solder the 25k ohm resistor?
I obtained a 500W flex slot PSU, and couldn't find anything anywhere else. As soon as pins one and two were bridged, the green light came on, and 6V at the big outputs. When pin 3 was grounded (680 or 1K was the same), 12.3 V. So it's usable anyway, and thanks. I may try to get it to 13.6 or so.
I'm happy you got it working! The resistor is probably not necessary, I used it as a precaution
Hi, do you have a link to do the volt mod on the HPE1400CB? Thank you
Hello @Minus 3dB In The Teens not sure if you are still around - about the 25K resistor to the pin on the right of the pot. This is on the middle connection of the pot meter, correct?
Hi, thank you for showing us how to use this PSU. Can you please explain us in a little more detail how you have soldered the 22k resistor, more precisely from where to where because I have tried and I’m constantly shorting it.
Rectification, I meant 25k resistors that you have mentioned on the logic board.
Only the 25 k will work? I test a 22k an a 30k, but every time protect... Take a picture?
hi ! did you found overvoltage protection ?
Hi, I was sold one of these HPE supplies under the pretense that it worked with a normal PC. Is there a way that I can adapt it to a normal consumer motherboard?
I know this is a two year old video, but does this work on 120v for USA?
Well it says 200v - 240v on it, so I doubt it
Hi mate! Thank you for a video! do you have any clue about this PSU working as a constant current source? will it trip to overcurrent protection if i connect it to the discharged big liion battery?
I dunno how hot it is where you are, Perth, Queensland etc, but temperature is all you need to worry about. In Tas I haven't had an issue using it as a power supply to run my car stereo in the driveway. I set mine to output 14v, it sags to about 13.4v when I connect it to my car, I've got vids of me drawing over 100A dynamically (at 14v, so 1400w +) with my car stereo, it takes it just fine, it is super efficient so bugger all heat output, BUT that fan has always been pretty awesomely quiet for me, dunno if it will ramp up if it needs to, I'd assume so..
Last week I disabled the OVP and now I have it idle at 15v because I have a LiFePo4 320Ah setup on the way and I hope that it will keep it charged up, because after 8 hours connected to AGMs and listening to music at over 100A draw continuous, the battery would start the car fine, but put a proper charger on the batteries and you would see it has been feeding the sound system all it needs, just hasn't been able to charge the batteries to 100% like, a battery charger! lol
I am 100% sure this will output 1400w *constantly* for more than 30 years, 24\7, just keep an eye on how warm it gets and how fast the fan spins.
It has a characteristic you need to know... If I don't attach it to my batteries in a certain way. it won't turn on, once I connect to the battery and turn it on it will instantly put itself into protect.
What I do is, place the positive lead on my battery, then hit the switch, which turns on the PSU output, then attach the ground to the battery, SWIFTLY, WITH PUPOSE! If I drag the clamp or terminal, if I accidently lift contact, hell, a lot of the time, I don't do anything wrong, but the PSU will be on and you go to connect the other terminal (neg) and it will shut off, protect, and you need to switch it off again and wait 10 seconds before retrying. It is actually a bit of faffing about, but you will soon learn the quirk and it won't be that big of a deal.
Connect POS to battery, switch unit on, connect NEG to battery and hope the green light stays on! You can try to connect NEG first if you get frustrated, it doesn't matter really which is connected first before powering on the PSU.
Goodluck 👍
Disable OVP:
ua-cam.com/video/e5L4t9x0kEc/v-deo.html
Hey i think of buying 2 of these PSU´s to fire Up both to get 24v for my Charger. The pinout is nice now i know how i can Power them on. And i think its the Same way i have to Float Ground on the Sleeve PSU as in other Guides. So i have a Brutal Power Supply then for my 2x30A charger.
I can probably figure it out but do you have a video showing the 14V mod in detail?
It has been 2 years, have you found what is tripping the OVP?
A lot of people could make use of 15V.
I turn on the PSU by shorting all those three pins directly (first pin is ground, two other are PSON and PSKILL), and to toggle it ON/OFF without unplugging the mains, the first pin is being switched from the other two which remain connected together.
EDIT: Nvm, someone already did OVP video watch?v=e5L4t9x0kEc&t
you want to power off at mains other wise you will still have the ac circuit powered up which will run warm and still pull power. putting a switch out front to switch only shuts off the dc power
You can now get breakout boards for this model!! Search for the Option Kit P/N: 720620-B21. You might try the other numbers and find more results too, such as 733428-101
I did this mod and got a stable 12.2v… then I drilled two binding posts through the PCB to connect to (rather than soldering wires onto the terminals). The voltage is now 13.1v and the fan ramps up lots when I simply put a multimeter across it…. You think it is stuffed? Perhaps the PCB is multi layered?
Look at the + and - output pins, they are different sizes on top than they are underneath. You might have it shorted out. That is why I just soldered to the top pads only
My supply is 12.4 volts, I need to make it 14.V, please tell me
search video on youtube, title "HP HSTNS-PD43, Hacked, OVP, 15.5 VDC"
Gday mate, thinking about using these for an rf amp supply, do you have any idea if they produce rf Interference. Thanks for the video
I have no idea how to even test that bud. But it's a high quality server power supply (so reliable and probably shielded somewhat for a server environment?), it has platinum efficiency (over 94%) and one of the things I deeply love about it is that I can run my car amplifiers directly off it, and I get a dead silent noise floor, no switching noise, nothing, plus the fan is crazy silent too. I seriously love it
bloody hell i wish the mrs would answer me that quick. thanks mate it appears most of the rf guys go for the hp's. for the price they are its probably worth just buying one and trying it. thanks for your time and video cobba, nice work @@minus3dbintheteens60
Video for this 1400w module for the voltage hack will be uploaded soon! I will post a link here when it's done!
Did you find over volt protection
Has the video for voltage hack ever been uploaded?
Cheers from the Ozarks. In one of your comments you mentioned parallel operation. Have you determined a pin to connect between two units to achieve this? For example on the HP 1200w units I believe it's pin 34, the load share pin.
Sorry David, I currently only have 1 of these units, I have 4x DPS-1300BB B which are very different. I've got a lot of other stuff on at the moment, but if I do work it out I will report it here
Hi, can you tell me how to disable OVP to Delta DPS-750 nb?
thanks....
Yo tengo la dps-800ab y es muy simple elevar el voltaje sin manipular nada solo conectando una resistencia de 1k en la línea positiva
Hello my friend. let me see If I understand you... for my purposes I need 12V... I only have to short pins 1 and 2 and connect a 1k resistor from pin 3 to gnd? thats all?
That is all. That will turn it on. I have found that when its turned on then I connect it to something, it turns itself off, so I unplug the IEC power cable from the PSU, unplug the ground wire from what I am connecting the PCU to, then I plug the power back in, then connect the ground wire back to the load, eventually it will stay on. I use it charge my car battery, I put alligator clips on the PSU output. I am getting 100A at 14v no probs.
For dell dps 1200 .1400watt pin turn on?
can you so me how and where you put the resister ect
Can you power this from 120v?
If you just read the sticker you'll know. It says 200v - 240v, so I doubt it
Hello! How did you manage to get over 13 V?
I added extra resistance to the pot that controls the feedback and therefore the output voltage. 25K ohm
Can you send me a picture so I can see exactly where ?
@@lucianmustata829 video on youtube with title "HP HSTNS-PD43, Hacked, OVP, 15.5 VDC"
Just a question what does the resistor attached to the pins do?
Do U need the resistor could U just short pin 3 to ground with a wire
The resistor is just to limit current. I was using resistors rather than dead shorting pins while trying to figure out the pin layout. Shorting those pins would probably work fine, however I dont remember testing it, and can't guarantee anything.
@@minus3dbintheteens60 thanks for the reply mate. 👍
@@trentoncorbet1 Hey just wondering if you tested out shorting pin 3 to ground with out the resistor?
@@markatkin7950 yeah mate I've had mine working without the resistor for about 5 months using it to power an amplifier and car stereo head unit running subwoofers and a couple 6 inch speakers, haven't had a problem so far, have done this on 2 psu's so far.. both dell branded. 1x 1400w and the other If I can remember 750w or so
just bought 4 to make a big workbench power supply
G'day mate how did u go with your supply, have a win ?
how to autostart
If you can't work out where the voltage adjust pot goes then you shouldn't be messing around with it at all
Well that's just an ass comment
Sometimes people need an helping hand to get things sorted out. Everyone starts at Zero. 😀 That's why most people look tutorials. But yes safety should be at first place at work like this. Anyway appreciate help for the inside look.
Look in the discription
Fack video bro no volt Incres 12.4 volt
for increase voltage he added extra resistor in the power supply, for more info you can search "HP HSTNS-PD43, Hacked, OVP, 15.5 VDC"
1k ?