EPS12V or ATX12V with EATX12V?

[The late XV105]

Brand new ASUS P8Z77-V LX motherboard with 8-pin EATX12V socket.

Antec TruePower 750w PSU with both 8-pin EPS12V and 4-pin ATX12V plugs.

Both plugs will correctly seat in the EATX12v socket (the 4-pin plug at the righthand end of the EATX socket if the latch is uppermost), but which should I use, please?

Information on the web doesn't always tally with what the ASUS and Antec user manuals imply. My guess is that "E" in EATX12V stands for "extended" or "expanded", so I should use the 4-pin ATX12V plug and ignore the redundant pins at one end of the EATX12V socket.

Correct?


TVM,
TLXV

[green granite]

According to the PSU's manual you should:

Connect the 8-pin or 4-pin ATX12V connector for the CPU to the appropriate connector on your motherboard. If your motherboard has an 8-pin socket with a cover on some of the openings, we recommend that you remove the cover and use the 8-pin connector.
Note: Please also refer to your motherboard user’s manual for any special instruction.

http://www.antec.com/product.php?id=1764&fid=237

[The late XV105]

Thanks, green granite, but I have the manual along with the words you quote, and this is part of the confusion.

The ATX plug from the PSU is 4-pin
The PSU also has an 8-pin plug but it isn't ATX, even though it fits perfectly
The ATX socket on the mobo is 8-pin with none of them covered

So, do I use the 4-pin plug because it is ATX, or do I ignore the nomenclature and use the 8-pin plug?

The mobo userguide doesn't help as it only shows pictures of connectors - both 4 and 8 pin - connected to the 8-pin socket, and makes no mention of nomenclature.

Ta.

[green granite]

All you can do is check that the volts on the pins are the same, or not and then make your mind up from that.

[The late XV105]

Thanks again.

A bit more creative Googling, and I found my question has already been asked (http://www.pcadvisor.co.uk/forums/1/tech-helproom/4126171/power-cable-query-from-psu-to-asus-p8z68-v-pro-gen3-motherboard/) - and answered. :)

I can use the 8-pin EPS12V in the EATX12V socket - which is how I had it before I got cold feet and tried to think logically!