I Have to swpa my PSU out of my rig today. For the time being I am putting in my old Jeantech Storm 700W modular PSU ( yes i know they are pants but I have no option ). It will only be for a few days/week until I get a new PSU. However I have lost the 8 Pin cable that goes from the back of the PSU to the CPU socket on the motherboard. I have found a different cable from another PSU that fits both sockets fine. Hoowever despite my best efforts I cant find a picture of the cable that shoes the pin layout. Ie does pin 1 got to pin one or does it swap over at some stage from pin 1 to say pin 4 etc. These are the best images I have found so far I cant quite make it out . By any sheer fluke does anyone have one of these old PSUs lying around and could double check and let me know please. The last thing I want to do is plug it in and blow everything. Thanks in advance
Can you see the colours of the cables at the motherboard end and have access to a multimeter? If yes to both, short the PSU on out of the case (with nothing else connected to it) by jumping a paperclip between the green wire and any of the black wires adjacent on the 20/24 pin connector and then use the multimeter to check that you have +12v on the yellow wires and 0v on the black wires. If you get that, I'd say you'll be fine.
They should be keyed so they can only go in one (the correct) way. Look at the connector. Note how two of the pins have the top corners squared and the rest are chopped off? They are so you can only insert the connector one way and not blow everything up.
Do you have a multimeter handy? An 8 pin CPU power socket is a row of four +12v lines and a row of four grounds. The +12v row is closest to the locking clip.
Both connectors fit in fine with out any issue it is the wiring that concerns me. I dont have a multimeter handy or I would have tried that first .
There's no reason the wiring would be different. That is why they mold the connectors so they can only go in one way.
I'm not sure if I'm too late but I do have this psu. I can send you a pic but not until tomorrow as I'm away from home. Let me know.
The cable you need is circled. You can see its a 4+4 cable on the motherboard side. You can see on the opposite end the 4 +12v connectors are all in one row on the power supply side and the 4 black ground cables below that. Your replacement cable should be colour coded in the same way. That is the connector which is inserted into the supply has 4 yellow cables in one row and 4 black cables on the row below that. The image also shows that the tab on the power supply end is on the +12V side of the cable. The cable can only be inserted into the power supply one way. This means that from the picture above you should be able to derive which row has the 4 +12V connectors on the power supply as well as if the connections match your replacement cable Also it doesn't matter which order the cables go in. As long as they are grouped together by voltage (one row of yellow and one row of black) In other words you can swap any yellow for any other yellow or any black for any other black and it won't matter.
That should be fantastic thank you bud...All being well everything should be ok. Ill let you know if I need another pic +10 rep
I believe that is wrong. A while back someone was asking a similar question about using cables from another PSU, and I had a look into it, using two of my PSUs and pictures on the net. IIRC almost every single one used a slightly different configuration.
You'd have to make sure that all the pins the yellow cables are plugged into were actually 12v, and the others were earths, otherwise it could go very wrong.
This would seem to confirm what I said. If every single one was slightly different, you should not have to worry about mixing them up. However, you do bring up a point and that is there is no industry standard for modular cables on the PSU side. There should be. That said, on some poorly designed modular PSUs you could connect 6-pin peripheral cables into the 8-pin CPU/PCIe sockets. But the better modular PSUs have cables with retaining clips that prevent that (unless the user carelessly, or foolishly breaks that off).
