ATX to AT power adapter converter review with -5V

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[colinstu]

Any updated links to selling these? ebay ones are dead.

[RetroPCUser]

I remember using that type of adapter for my old 486/Pentium MMX PC when my AT PSU died on me, and I had a spare 520W ATX PSU on me, and the adapter was the key for me (saved a trip and money getting a new AT PSU). My Pentium PC has both an ATX and AT connections, and still powers on with the ATX PSU connected to it since the board detects the type of PSU without manually setting jumpers.

[VintageLizard]

Are any of the ATX to AT adapters currently on ebay worth getting?

[alexanderalfonsson]

The ebay links don't work anymore.

[UmarAbid]

I have original exbox im trying to hook up to tax PC power supply does your adapt work with that

[NaoPb]

I am restoring my childhood 386sx system and am at this point considering one of these adapters, as the original psu is only delivering 10v on the 12v rail (5v rail is just fine) and I don't really have any knowledge of power supplies.

Since I cannot find the adaptor with the -5v stepdown converter (I think it takes -12v and steps that down) I am now considering the voltageblaster from you and NecroWare.

In case you are interested, it's a Highscreen Colani flat model.

[CrazyRobitz]

This makes so much sense now, 😅. I just swapped for a atx from my old computer and it didnt have -5v and i got just static, but i don't have power to crt screen/ no picture. Im going to check another atx i have. Ive been searching everywhere to know what the -5v was for. The screen use to work but the psu failed from moisture damage. Its been sitting in my garage for the last 7yrs unused.

[daskarman]

Hello since the cable with the positive to negative voltage converter and load resistor are no longer available could you list the actual parts numbers ? -Thanks

[ruthlessadmin]

I have an old ATX PSU that shows a -5v rail on the label, but when I measure it through my ATX-to-AT adapter (which does not have a voltage converter), it shows +5v on the -5 rail. Does this indicate a fault w/ the PSU or adapter? I assume it's not safe to use in this configuration, either way....?

[dreddd]

Hey Phill.I have an IBM aptiva from 1995 and the old powersupply have 4 those old white pin connectors and those cables from ebay have only 2 for power.But i need one more into the board witch is in main motherboard.Can you maybe help or make a video?

[arf]

The -5V are in the pin 2 of P8 right?
I have seen some datasheets that differes with that, some have n/c, others have +5V and others have -5V, i'm not quite sure and i dont want to burn my 486
Also i think the 20pin atx connector actually has -5V so there is no need for a dc/dc converter

[Jackpkmn]

I wish you had included the listing names in the description because trying to search for the version with -5v on ebay today is a nightmare. I had no idea what the convention is for naming these since -5v will remove the term 5v from your search instead of searching correctly.

[lajavimilei]

Its kind of weird that this simple thing sold out on ebay and the person that did these disappeared. Im sure there is a lot of demand for something like this, did you keep the contact of the seller? maybe he died?

[Rainfall_Sky]

Where can I buy ATX to AT adapter with -5V support now? Ebay and Aliexpress shows no results.

[BladeRunner]

An ATX PSU needs a load, the first adapter doesnt need to dummy load because the PSU is off until you press the button, the 2nd the PSU is live all the time its putting out power to the ATX 20 connector pins at all times so it needs a load.

There are a lot of videos on here about it all, please dont try and do this on the cheap it will kill your PSU and might take some of your old hardware with it... Just for the sake of a few extra pounds.
If you cant afford to buy these wait until you can afford them they are the best way to do it guys

[drhoads]

Hey Phil, I got myself a nice 386 board that was said to be working. I got an ISA VGA card and this adapter with a switch. When I press the switch, my power supply turns on but I dont have any display. I made sure to put the AT cables black to black like you said. I obviously don't have any spare parts to test. Do you have any thoughts on how I could narrow down the issue if it is the mother board or the video card? No fan headers or anything on the board that I can figure out to test to see if there is at least power going through the board.

[Space_Marine_lol]

how do you choose ur atx powersupply instead?
old motherboards are +5v heavy while newer ones are +12v heavy. is it safe to use a 12v one with older boards? its just about the maximum amperage on each line?

[bookshelffury]

Phil we need your help! I can't seem to find one of these with the -5v anymore. Have you run into any issues running isa sound cards without -5v?

[klenchr]

Great video...question though. I have a modern atx psu with no -5v. I want to use it on my asus pentium iI mobo that takes atx. However, the asus mobo wants -5v for the isa slots. How do you use a new atx psu with no -5v rail on a older atx mobo that needs -5v.

[BEAMERNOOB]

Is there any reason to have a -5v on a 20 pin atx motherboard that doesn’t have any isa slots? I have an asus p3c-d dual pentium 3 motherboard rig I’m building and it has a 6 pin at aux connector the manual states 3 grounds, 2 +3v and one +5 volt on the 6 pin. I was going to get those from a sata connector. And on the 20 pin connector it shows -5v on the Pinout for the 20p connector. The board does use RDRAM too so idk if the ram possibly Utilizes the -5v. Bunch of parts currently in the mail still my plan was to just try it without a -5v and see if there are any issues. If there seem to be issues I’ll go ahead and try splicing in that dongle portion off the adapter with the -5v add on.