Which cables do I use for CPU and GPU?

[qmp11037]

First time building a PC and I've run into some trouble with the cables for my CPU and GPU. I have a Corsair Rm1000x PSU and it seems the CPU cables that came with it don't match the connectors for the CPU on my motherboard (Asus Prime x670E pro wifi). The shapes don't match up and I can't plug the 4+4 side that says "CPU" into the power supply. Do I need different cables?

 

Also, my GPU is NVIDIA 3090ti Fe and it comes with a 12 to 3x8 pin power adapter. The three PCIE cables that came with my power supply are 8pin on one end and branch into two 6+2s on the other end. Do I only use two PCIE cables, using both 6+2 ends of one of them to hook up to the GPU's power adapter? Or do I need to use all three cables, one for each of the 3 GPU connectors, and leave the extra 6+2 on each one hanging off? 

 

Sorry if that's a bit confusing. Wasnt sure how to word it and I really don't understand much about cables 

 

Here's a link to my build on PCPartPicker https://pcpartpicker.com/user/qmp117/saved/#view=n6XDjX  

 

 

 

 

 

 

 

 

[Anghammarad]

On the PSU itself it's easy, GPU and EPS are the same sockets there. 

 

As for the cables, use EPS for the Mainboard, agd GPU for the GPU. the plugs are usually labeled. 

[mariushm]

Ignore the shape of the pin holes for the EPS connector. 

Originally the EPS connector and the 4 pin cpu power connector had some pin holes square, and some pins had a D shape, so that you could not insert the wrong connector there. 

Only a half of the EPS 8 pin connector could go into a 4 pin cpu power connector on motherboard due to that keying. Some PSU makers use a slightly custom 8 pin connector that can be split in 2  4 pin pieces and either of the two 4 pin pieces can be plugged into a 4 pin cpu power connector. It makes it more user friendly. 

 

The header on the power supply  is basically  4 pins of 12v , 4 pins of ground. 

EPS (cpu 8 pin)  has a row of 4 pins with 12v, and a row of pins with ground ... so it's basically straight wires. 

Pci-e 8 pin has a row of ground pins, and the other row is 3 12v pins and 1 ground pin ... so it's normal to have only 3 of those 12v pins on the power supply side used.  That's why there's a contact missing from the connector that goes into the power supply, in the case of gpu / pci-e 8 pin cable. 

 

 

[qmp11037]

13 hours ago, mariushm said:

Ignore the shape of the pin holes for the EPS connector. 

Originally the EPS connector and the 4 pin cpu power connector had some pin holes square, and some pins had a D shape, so that you could not insert the wrong connector there. 

Only a half of the EPS 8 pin connector could go into a 4 pin cpu power connector on motherboard due to that keying. Some PSU makers use a slightly custom 8 pin connector that can be split in 2  4 pin pieces and either of the two 4 pin pieces can be plugged into a 4 pin cpu power connector. It makes it more user friendly. 

 

The header on the power supply  is basically  4 pins of 12v , 4 pins of ground. 

EPS (cpu 8 pin)  has a row of 4 pins with 12v, and a row of pins with ground ... so it's basically straight wires. 

Pci-e 8 pin has a row of ground pins, and the other row is 3 12v pins and 1 ground pin ... so it's normal to have only 3 of those 12v pins on the power supply side used.  That's why there's a contact missing from the connector that goes into the power supply, in the case of gpu / pci-e 8 pin cable. 

 

 

Ahh okay I tried plugging the EPS cable into the CPU power connector and it plugged in fine so I just didn't know if the shapes of the pin holes mattered or not. Very informative, thank you!