[URGENT] Connecting cx550m to 2x 6pin gpu

[Lolcrokn]

So since its semi modular psu i connected 24 pin and 8 pin cpu

Im left with connecting 2x 6pin gpu (7870) and connectors on psu that i have left are 

Peripheral

6+2 pcie 

4+4 cpu

I got cable 8 pin to double 6+2 pin

Am I allowed to connect that 8 pin to 4+4 cpu and simply connect two 6 pin conmectors and leave +2 hanging or do i connect it in some other way that i cannot figure out

[Oshino Shinobu]

The 6+2 pins connectors are designed so that they can be used for 6 pin connectors or the +2 can be used for an 8 pin connector. It's fine to leave the +2 just hanging. 

[Jurrunio]

Dont use CPU for PCIe. Different voltage. The best way is PCIe 8pin to 2 6pin adapter.

[Lolcrokn]

Just now, Oshino Shinobu said:

The 6+2 pins connectors are designed so that they can be used for 6 pin connectors or the +2 can be used for an 8 pin connector. It's fine to leave the +2 just hanging. 

I know but i have 8 pin on the other end to connect to psu can I connect it to 4+4 CPU or no

[Lolcrokn]

Just now, Jurrunio said:

Dont use CPU for PCIe. Different voltage. The best way is PCIe 8pin to 2 6pin adapter.

Then I would need 6pin to 8 pin adapter so that 8 pin can go 2X 6+2 pin because I dont have 8 pin on psu except for CPU 

[Jurrunio]

Just now, Lolcrokn said:

Then I would need 6pin to 8 pin adapter so that 8 pin can go 2X 6+2 pin because I dont have 8 pin on psu except for CPU 

PCIe 8pin is the same thing as 6+2 pin.

[Lolcrokn]

Just now, Jurrunio said:

PCIe 8pin is the same thing as 6+2 pin.

Im aware but look up picture of cx550M and u will see that there is no 8 pin end on psu only 4+4 pin cpu everything else is 6pin and im given 8pin to 2x 6+2pin cable

[quan289]

The 4+4 pin connector is for the the connector on the motherboard.

The 6+2 pin is for the graphic card

The 8 pin side of the 6+2pin cable into the PSU

 

On the PSU, it should say "6+2PCI-E & 4+4CPU", the two ports next to it design in a way that you can plugged in the 6+2 pin cable or the 4+4 cable if you have it.

[Oshino Shinobu]

8 minutes ago, Lolcrokn said:

I know but i have 8 pin on the other end to connect to psu can I connect it to 4+4 CPU or no

The 8 pin to dual 6+2 pin should go into the PCIe connectors on the PSU end. The 4+4 pin CPU power cable has nothing to do with PCIe and will not work in any way with PCIe cables or connectors. 

[Lolcrokn]

Just now, Oshino Shinobu said:

The 8 pin to dual 6+2 pin should go into the PCIe connectors on the PSU end. The 4+4 pin CPU power cable has nothing to do with PCIe and will not work in any way with PCIe cables or connectors. 

Can you look up picture of power supply there is no 8 pin pcie end on power supply 

 

Just now, quan289 said:

The 4+4 pin connector is for the the connector on the motherboard.

The 6+2 pin is for the graphic card

The 8 pin side of the 6+2pin cable into the PSU

 

[Oshino Shinobu]

@LolcroknAhh, I see what you mean. For CPU power, use the permanently attached cable and plug to 8pin to dual 6+2 pin into the PCIe/4+4pin CPU connector on the PSU. 

[Oshino Shinobu]

Just now, Lolcrokn said:

Can you look up picture of power supply there is no 8 pin pcie end on power supply 

 

 

Yeah, just looked up the PSU and see what you mean. Connect the dual PCIe 6+2 pin connector to the PCIe/4+4pin (bottom right connector)

 

 

For CPU power, use the non-modular cable. 

[Lolcrokn]

Just now, Oshino Shinobu said:

Yeah, just looked up the PSU and see what you mean. Connect the dual PCIe 6+2 pin connector to the PCIe/4+4pin (bottom right connector)

 

 

For CPU power, use the non-modular cable. 

So you are saying that i should put pcie 8 pin imto the bottom right connector and use 6+2's for gpu while non modular one is for cpu

[quan289]

6 minutes ago, Lolcrokn said:

Can you look up picture of power supply there is no 8 pin pcie end on power supply

I've made an edit in case you didn't see. That bottom right 8 pin port is the for the 6+2 pin PEG cable. Since the 4+4 pin cable consist of 12V and ground wires, they design it in a way that they are interchangeable in which you can plug in a second 4+4 cable if you wish (this is not relevant in your case).

 

[Lolcrokn]

Just now, quan289 said:

I've made an edit. That bottom right 8 pin port is the for the 6+2 pin PEG cable.

 

So  is this correct 

So you are saying that i should put pcie 8 pin imto the bottom right connector and use 6+2's for gpu while non modular one is for cpu

 

[quan289]

Just now, Lolcrokn said:

So  is this correct 

So you are saying that i should put pcie 8 pin imto the bottom right connector and use 6+2's for gpu while non modular one is for cpu

 

yes.

[ItsTheDuckAgain]

holy shit that took some posts to get to the end :-)

gz @quan289 for sitting through ^^

[H0R53]

1 hour ago, Jurrunio said:

Dont use CPU for PCIe. Different voltage. The best way is PCIe 8pin to 2 6pin adapter.

That's incorrect. It'st he same +12v, the pinout is different though. You'd have to swap the positions of the yellow wires and force the connector into the GPU.

 

I don't always have the right PSU, I've stripped wires and soldered 6-pins onto PSUs that don't normally have them, like Dell Optiplex PSUs to put Quadro FX3800s in on the OEM PSU.

 

Is it dangerous to jank a PSU? Yes. Does it work if you don't mess with it? Yes.