Can I use two 6-pin connector for a GTX TITAN X(Maxwell)?

CiroGes · May 24, 2017

Hello,

I have a supermicro tower with the following SPU characteristics:

1U 920W Redundant Platinum Level Power Supply:
->Power Efficiency: 94%
->Total Output Power and Input: 920W with Input 100 - 240Vac
->AC Input Frequency: 50-60Hz
->Dimensions (L x W x H): 336 x 76 x 40 mm
->Output Type : Backplanes (gold finger)
->+12V: Max: 75A / Min: 0.5A (100Vac - 240Vac)
->+5Vsb: Max: 4A / Min: 0A
->Power Distributor:

PDB-PT745-8824
O/P: 12V/108A
+5V Max: 25A
+3.3V Max: 25A
-12V Max: 0.6A

Also I have a Nvidia GTX Titan x (Maxwell) which requires a 6-pin connector and a 6+2 pin connector BUT, the power supply doesn't provide a 6+2 pin connector, only the 6-pin ones.

Can I leave the 2 pins without connection or it is absolutely necessary to connect them? Due to the extra 2-pin are only ground.

If the answer is NO, Can I use a 6-pin to 8-pin adaptor?

PD: Sorry for the bad English.

okcnaline · May 25, 2017

Is this a Dell workstation?

Yes, you could. Minimum 2 6-pin PCI-e connector required. http://www.nvidia.com/content/geforce-gtx/gtx_titan_x_user_guide.pdf

CiroGes · May 26, 2017

okcnaline :

Hi! Thanks for answering!

About your question, no, this is a Supermicro workstation.
Being more spicific it's this one: http://www.supermicro.com/products/chassis/4u/745/SC745TQ-R920B
And the motherboard installed is this: http://www.supermicro.com/products/motherboard/Xeon/C600/X10DRi.cfm

okcnaline · May 26, 2017

Bad guess x)

Yep, Titan X would work.

tsnor · May 27, 2017

Low risk here. Either the two X 6-pin works, or slap a 6-pin to 8-pin adapter on one of your 6-pin inputs. They cost $5 on amazon or at newegg. No adapter is better than using an adapter if it works.

CiroGes · May 30, 2017

tsnor :

1) So, are you saying that it would be better leave it without adapter than pluging it one?
2) Could you tell me which is the purpose of the two additional pins that are ground please?

okcnaline · May 30, 2017

CiroGes :

Ground is infinite charge. If something is plugged into ground and that something fails, all the charges in the electricity flows toward a ground, where the amount of charge won't matter. It's a safety measure.

tsnor · Jun 2, 2017

CiroGes :

1) Yes, if it will work with 2 x 6pin then you are better off with 2x 6-pin then 1x 6pin and 1x 6pin to 8 pin adapter. Why? Because each connection adds resistance to the wire and an opportunity for fail. Behind the 8 pin all the of 12V leads go to a common 12V and all the grounds do the same, so you are not losing anything by not providing power to all the pins in the 8pin socket. You are losing something with the extra connections needed by the adapter.

2) The two additional pins in a 8pin are use to reduce the current flow over each connector. They are additional 12v and ground. That gives an 8-pin three 12v wires to cover the load vs. two 12v in a 6pin, so the amps over any one wire is lower (but it's not the wire that is the potential problem unless you have really bad wire, it's the connector.) Lots to read here: http://www.overclock.net/a/gpu-and-cpu-power-connections

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