atx 12v vs eps 12v

[Deleted member 234478]

so looking at the 4+4 cpu connector of a psu I have, I think 4 of the connectors seem to be atx 12v but what are the other 4pin? they arent like any of the diagrams shown.

looking at the eps 12v 8pin connector diagram, and comparing to the 4+4 layout the psu I have, it doesnt have this 4 square and 4 rounded connectors of the eps 12v. it has 4 of the pins like the atx 12v as shown, but has another 4 thats all rounded. those 4 rounded arent shown in the diagram. so what is happening?

I think the reason I have one of the wire/plastic burnt/dried/cracked is because Im guessing the motherboard wanted 12v eps and I gave it an atx12v connector?

this psu works perfectly fine till I pulled it from an older fx cpu build. im sure its good, but trying to understand the connectors. I did get 2 molex to an 8pin eps as shown in the top diagram. I would like to try it on another build just to see if the psu works. dont care to buy another psu tester. had it, tossed it. showed a corsaid psu thats ok, when it was dead.

I want to try the psu, and ill try, jyst want to know if I should transplant the 8 pin for the 4+4 or just use the 2xmolex to eps 12v as is.

psu is antec vp600p

 

[_roman_]

You did check the polarity with a true rms multimeter before? And the pinout of those connectors?

when everything is okay and working as specified you can just exchange the connector. I will not determine over the air if your up to 6 year old psu, with 3 years warranty and only 80 plus rating is fine or not.

i think most mainboards clearly state how the connectors are and which pinout. I'm kinda sure every quality psu has a pinout which makes things really clear.

 

[Deleted member 234478]

are and which pinout

manual doesnt have the pinout. shame. I have a regular multimeter. not rms.

 

[dirtyferret]

it has 4 of the pins like the atx 12v as shown, but has another 4 thats all rounded

you sure it has four that rounded and not three like a PCIe 8 pin?

because that would fit your manual

 

[Arctucas]

All about the various PC power supply cables and connectors

All about the various PC power supply cables and connectors

www.playtool.com

All about the various PC power supply cables and connectors

All about the various PC power supply cables and connectors

www.playtool.com

 

[Deleted member 234478]

apologies for my delay and thanks for the help. so heres an image. left is new 8pin to 2 molex (folded the wires in hand to take the picture)

and the right top is the burnt 4+4. the one under it shows the 2 lines coming from the psu (yellow/black colored) 2+6 pci connectors and the burned 4+4

look at the shapes of the connectors. the left 8pin (new adapter) doesnt match the burnt 4+4. im dumb but must be blind too that I missed something

1 thing I want to add is that this psu has 2 molex connectors, but they are not on different lines. its 1 line that has 2 sata and 2 molex. for this old build I think it should be ok. otoh, id rather just cut the old 4+4 pin and solder in this 8 pin but the pinout shapes are different as can be seen

 

[dirtyferret]

look at the shapes of the connectors. the left 8pin (new adapter) doesnt match the burnt 4+4. im dumb but must be blind too that I missed something

so that you insert the cable correctly in either a 4 pin or 8 pin, round pins fit into square holes in motherboard connectors but not vice versa

and the right top is the burnt 4+4

why is burnt?

1 thing I want to add is that this psu has 2 molex connectors, but they are not on different lines. its 1 line that has 2 sata and 2 molex. for this old build I think it should be ok

will it be ok? depends on the mobo, CPU, and PSU which brings up my former question why was the native CPU power cable burnt?
The antec v600p was not anything special when launched and that was a while ago. Maybe time to move onto a new PSU...with proper non-burnt connectors?

 

[Deleted member 234478]

thanks for the reply and good information. I dont know what happened with the psu and why it had that burned pin. im going to try the molex/cpu adapter on the same old pc and see what happens. then see from there where things go. I have a hunch the mb may not be toast. well see

im not buying a new psu cause I spent way too much the last few months. and i do like making sure things are completely bad before tossing.

 

[Freaksh0w]

You can run 8+4 pin EPS connectors with just the 8-pins just fine for even a 5900x/5950x. The 8-pin supplies around 235 watts of power to the CPU. The extra +4 not only supplies even more power, but it just makes it far more steady on power hungry CPUs. Not all PSUs have 8+4 EPS plugs.

 

[Deleted member 234478]

You can run 8+4 pin EPS connectors with just the 8-pins just fine for even a 5900x/5950x. The 8-pin supplies around 235 watts of power to the CPU. The extra +4 not only supplies even more power, but it just makes it far more steady on power hungry CPUs. Not all PSUs have 8+4 EPS plugs.

thanks for the help. im not using this psu for 5950x. itll be on an old am3+ FX cpu. I have a 750w modular psu for the ryzen. its MB only has an 8pin connector btw. cheers

 

[Shrek]

shame. I have a regular multimeter. not rms.

Don't need an RMS meter, we are not talking AC here.

 

[Deleted member 234478]

Don't need an RMS meter, we are not talking AC here.

cool, ill check what I get from those pins. thanks Shrek!

ok updating this, I tested that 4+4 with a MM and the top 4 (yellow wires) put out 12v (11.91) so Im sure the psu is fine but something weird happened and why it burned like that i dont know. Ill just transplant solder in the new 8 pin and it should be fine.

thanks all.