8+6 pins won't boot instead of 8+8

[240_17user]

K. I have asus R9 280x and psu corsair hx 650. That boi has blue 2x8 pci-E and black 6x6 Periferals and Sata connections. My other GPU only needs 8pin pci-E, however, R9 280x boots only when it starts on all 2 blue 8 pci-E (16) but it should take only 6+8 (1x6pins from Periferals and Sata, and 1x8pins pci-E), where in last case system won't boot at all, only half sec coolers lights and done, no response until O/I PSU .
I want to give 1x8pin for each of my gpus , and add 1x6pin for R9 280x and boot all of that somehow.
I know that I could solder 8+6 just into 8pin and it should work but I never done this before, or probably my system won't boot because 6pins power really only for Periferals and Sata, or it start work not at the same moment with 8pins, don't know.
Help pls to find best cheap and fast solution for this problem, thanks.

[STRMfrmXMN]

29 minutes ago, 240_17user said:

K. I have asus R9 280x and psu corsair hx 650. That boi has blue 2x8 pci-E and black 6x6 Periferals and Sata connections. My other GPU only needs 8pin pci-E, however, R9 280x boots only when it starts on all 2 blue 8 pci-E (16) but it should take only 6+8 (1x6pins from Periferals and Sata, and 1x8pins pci-E), where in last case system won't boot at all, only half sec coolers lights and done, no response until O/I PSU .
I want to give 1x8pin for each of my gpus , and add 1x6pin for R9 280x and boot all of that somehow.
I know that I could solder 8+6 just into 8pin and it should work but I never done this before, or probably my system won't boot because 6pins power really only for Periferals and Sata, or it start work not at the same moment with 8pins, don't know.
Help pls to find best cheap and fast solution for this problem, thanks.

Best solution is to plug in all the pins on the GPU...?

 

Those are there for a reason.

[Trekt Nation]

You can get a 6 pin to 8 pin adapter 

[vanished]

I have no idea what is going on... are you saying your card requires two 8 pin PCIe connectors and then saying that it only works when you plug them in, and not when you only plug in a 8 + 6?  Because if that's the case, then, yes, that's expected behaviour...

[240_17user]

11 minutes ago, Ryan_Vickers said:

I have no idea what is going on... are you saying your card requires two 8 pin PCIe connectors and then saying that it only works when you plug them in, and not when you only plug in a 8 + 6?  Because if that's the case, then, yes, that's expected behaviour...

R9 280x have only 14pins

Boots only when I put wires into 2x8 slots (I need 1 for another gpu) on psu, won't boot when I put wires into 8+6.

Video card boots only on blue ports, why?

 

[TheRandomness]

1 minute ago, 240_17user said:

R9 280x have only 14pins

Boots only when I put wires into 2x8 slots (I need 1 for another gpu) on psu, won't boot when I put wires into 8+6.

-snip-

Please, make a little more sense, otherwise we are unable to help you.

[vanished]

2 minutes ago, 240_17user said:

R9 280x have only 14pins

Boots only when I put wires into 2x8 slots (I need 1 for another gpu) on psu, won't boot when I put wires into 8+6.

 

ok so the card only needs 8+6, that makes sense.

 

I'm trying to figure out what the modular options are on the HX650 but even the website doesn't make it very clear...

[Jurrunio]

6 minutes ago, 240_17user said:

R9 280x have only 14pins

Boots only when I put wires into 2x8 slots (I need 1 for another gpu) on psu, won't boot when I put wires into 8+6.

 

Bad port on psu? How long have you been using it?

[240_17user]

2 minutes ago, Ryan_Vickers said:

ok so the card only needs 8+6, that makes sense.

 

I'm trying to figure out what the modular options are on the HX650 but even the website doesn't make it very clear...

[vanished]

3 minutes ago, 240_17user said:

 

I'm referring to the ports on the back where you connect the cables.  What does it provide for PCIe power?

[240_17user]

1 minute ago, Ryan_Vickers said:

I'm referring to the ports on the back where you connect the cables.  What does it provide for PCIe power?

[vanished]

2 hours ago, 240_17user said:

 

Hm, those aren't labelled very well, but plugging the 8+6 that you use on your GPU into either of the blue ports should do it.

[240_17user]

22 minutes ago, Ryan_Vickers said:

Hm, those aren't labelled very well, but plugging the 8+6 that you use on your GPU into either of the blue ports should do it.

It doesn't work at mode 6+2pciE(blue)+ 6(black) and I can't understand why? (Even solo). It works perfect only when I use 2 both blue sockets to connect 8+6 card, then I can't connect second gpu anymore...

[vanished]

Just now, 240_17user said:

It doesn't work at mode 6+2pciE(blue)+ 6(black) and I can't understand why? (Even solo). It works perfect only when I use 2 both blue sockets to connect 8+6 card, then I can't connect second gpu anymore...

what does the cable that goes between your GPU and the PSU look like, specifically what's on both ends?

[240_17user]

45 minutes ago, Ryan_Vickers said:

what does the cable that goes between your GPU and the PSU look like, specifically what's on both ends?

Cables are fine, usual 6+2pin.

[240_17user]

I think for some reason pci-E and Periferals couldn't be in one circuit, or they are booting not simultaneously, I mean what if they have small delay that can't boot video card from different sources blue and black(as I mentioned before and I have attached photos) even from black pciE Periferal 6 (where 3"+", 3 "-") plus experementally added (2 "-") from PCIE blue slot, any GPU won't start, only when cords are connected to blue slots. 

P.S. 1GPU 8pins; 2GPU 8+6pins; boot only from blue sockets on PSU hx650; wires all checked vise versa.

[Glennieboyyy007]

if you put the 6pin cable in the peripheral/sata port (black port) it will not function because it isn't designed with the same electircal specs as the blue ports

[Sakkura]

Your power supply only offers two PCIe power connectors for graphics cards. If you need more than 2 for your cards, you will need to upgrade your power supply.

[vanished]

I'm still not quite sure what is going on or why things aren't working.

[Sakkura]

2 hours ago, Ryan_Vickers said:

I'm still not quite sure what is going on or why things aren't working.

He has a 280X that requires an 8-pin and a 6-pin, and another GPU that requires a single 8-pin. 3 PCIe power connectors necessary.

 

The PSU only provides 2 PCIe power connectors (both 6+2 pins), so he tried plugging into the modular sockets for peripherals/SATA on the power supply.

 

Lucky that didn't fry anything, really.

[vanished]

15 minutes ago, Sakkura said:

He has a 280X that requires an 8-pin and a 6-pin, and another GPU that requires a single 8-pin. 3 PCIe power connectors necessary.

 

The PSU only provides 2 PCIe power connectors (both 6+2 pins), so he tried plugging into the modular sockets for peripherals/SATA on the power supply.

 

Lucky that didn't fry anything, really.

oh.

 

[DoctorZeus]

Lucky you didn't blow up your stuff friend. You need a power supply with at least 1 more blue socket for your pcie.

[TisJester]

The problem is likely in the pin configuration of the Peripheral / Sata power Port or Cable that is included with the Modular Power Supply.

 

Since it is perfectly possible to take 2 4pin Molex connectors and convert them to a 6 pin.. I am sure the power coming out of the non blue ports is just like power coming out of the blue ports.. So I think the reason it is not working is due to what voltages are going to what Pins using the Black cable into the Black Modular port.
In other words the Cable is wired wrong for PCIe 6.

 

Check out This site for Pinouts OR just get a Dual 4 pin Molex to 6 pin PCI adapter..
http://www.overclock.net/t/1420796/repository-of-power-supply-pin-outs
 

I do not think they use capacitors on their modular cables.

 

If it was me I would plug the cable into the power supply and map out each pin myself to be sure. Using a Multimeter check voltages and make sure all are the same and if not swap the pins around until they are and then label that cable as special. OR just get Dual 4 pin Molex to 6pin adapter and call it a day.. They make single 4pin Molex to 6 pin PCIe BUT I would get the dual 4pin Molex depending on the wire gauge. 

Beyond that.. Make sure your not exceeding the MAX power draw of your PSU