help with understanding PSU connection ports questions

Bromshow

Commendable
Aug 31, 2016
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Hi, I will be getting a fully modular power supply, I have read the online manual and looked up some videos and information, but I still have a few questions to wrap my head around these cables.

EPS 12V 8 Pin ports.

For your motherboard/cpu power, PCIE 8 pin will not work in this 8 pin connection, why is that? Why did they make non universal cables for same pins Layouts?

PCIE 6+2 Pin for your graphics card I am familiar with the 6+2 cables.

PCIE 6+2 + 6 Pin. Purpose: ???? What is the difference between this and the 6+2? They are both 8 pin slots, can you plug a 6 pin pcie cable into these 8 port slots but not the other ones that don't specify +6?

Sata Ports, Manual says 4 Sata 5 pin. They are 6 pin connections, what does that mean?

Perif: 3 molex 4 pin, this looks exactly like the sata ports, a 6 pin connector, whats the difference?
is it saying you can plug 3 molex devices into this port?

Perif/Sata 2 molex 4 pin + 2 sata 5 pin. Again, what is this?

What are the ratings of these ports? The manual gives watts, amps, temps, but says nothing about loading these circuits, im assuming its a bad idea to daisy chain all your devices to a single port, but im assuming you could considering the adapter options you have for cables, but nothing tells you not to? If I ran 2 pumps from a duel molex adaptor into a single port would that be overloading the circuit?

How do these 6 and 8 pin connectors work electrically? Is it just 3 and 4 12 V circuits?

Thanks for your help



 
Solution
They use the same headers on the psu end to simplify logistics as it is capable of the same output,so no point getting a custom header .Saves quite a lot of money
1) EPS and PCI power cables are wired differently, so they cant be used interchangeably. Thats hows its been, they are not compatible.
2) 6+2 +6 is a 6+2 pin connection, with an additional 6 pin connection on the same cable. Intended for cards that require a 6 and 8 pin.
3) Dont worry about the SATA labeling, its the same.
4) Google a SATA cable, and a Molex cable, they are nowhere near the same thing.
5) Not sure on the Perif/SATA part, your specific unit would be helpful.
6) Watts and amps (given this you know volts) are all the information needed. They dont tell you not to use certain adapters/splitters because there are so many for various uses. They rely on the end user to understand what to do and what not to do. Generally, dont use adapters at all.
 

AppleGwava

Reputable
Jul 11, 2016
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5,365
Eps 12 v was a improvement on the old 4 pin cpu power.It is not electrically compatible witht the gpu(different pin out )and will fry the gpu(even though it is squared off at one end)

6 +2 +8 pin.Im pretty sure this is a 8 pin cable with a splice of the 6+2 variety coming out of it(think hydra/a split in a plants stem)one cable to the psu,2 cable coming out of the gpu end

4 sata 5 pin.4 sata plugs on one cable.Not all pins are used on the sata interface.

3molex 4 pin.molex is a blocky 4 pin connector,usually with only 2actual electically connected ones.

2molex + 2 sata. For people who dont need so many sata ports.Its basically for the lazy people or the ones with too many hdd

On the psu it will state the amperage of the rails.im no expert but the 12 ports are all on this 12v rail.so they end up in the same place.
 

Bromshow

Commendable
Aug 31, 2016
10
0
1,510


I do know the difference between a sata cable and molex cable, I dont understand why the ports labelled "perif 3 molex 4 pin" are also 6 pin ports exactly like the ports marked as just sata.

It tells me the overall watts and amps of the complete unit, it is giving you a very general TOTAL possible output of the power unit. This almost certainly does not mean you can load up the unit 100% on 1 of your available (example) PCIE 8 pin ports.

You say to generally not use adapators, but when companys in 2016 pump out products with molex connections, sometimes you got no other choice.

Thank you for your other answers.