Using 6-Pin Power for GTX 1070

[S_Bartfast]

I've just bought a new computer to spend the Easter break thrashing out some gaming and just as I finished assembling it I've discovered I only have a single 6-pin PCI-E power cable left while the card has a socket to accept an 8-pin cable. The documentation that came with the card is very sparse however the back of the box does state in small writing "Minimum 500W or greater power supply (with one 8-pin PCI Express supplementary power connector)".

I have tried to both call and email the shop from who I bought the components from however they have not answered/replied and they are unlikely to do so till the end of the break. I am extremely disappointed as I very much want to play with this system over the Easter break myself (that's exactly why I bought it at this time) so want to know if it will be okay to simply plug the 6-pin cord into the first 6 ports of the 8-pin socket.

Specifically the graphics card is a GeForce GTX 1070 WINDFORCE OC 8G card and the case I unwittingly bought is a Versa H23 with 500W Power Supply. The store I bought it from confirmed everything I ordered was compatible however I am not at all confident these components are.


Thank you for you help,
Slarti.

 

[madmatt30]

When you buy a case with an included PSU mate what you get is a low end low quality PSU that's incapable of delivering its rated power.

You think you're saving money but in reality you're not.

That PSU isn't enough for the 1070 , it has 29a total on the 12v making it in reality a 350-360w unit.
The reason it only has a 6 pin plug is because its not good enough to carry an 8 pin.

 

[S_Bartfast]

When you buy a case with an included PSU mate what you get is a low end low quality PSU that's incapable of delivering its rated power.

You think you're saving money but in reality you're not.

That PSU isn't enough for the 1070 , it has 29a total on the 12v making it in reality a 350-360w unit.
The reason it only has a 6 pin plug is because its not good enough to carry an 8 pin.

Damn it!

As it is I ran my setup through a PSU calculator and it actually said even 350W should be more than enough, so I thought the included 500W would be ample. Man, I am so pissed off!

I would have been more than happy to buy the appropriate gear and did in fact double check and was told this gear was appropriate. So infuriating. Now there's nothing I can do till the end of the break. #@%$!!!!!

 

[madmatt30]

A live & learn experience mate unfortunately.

Never ever buy a case with an included psu unless you either really like the case & plan to replace the psu or you're building a basic desktop not a gaming machine.

The only 2 case manufacturers that put half decent psu's in their cases as a buying option are Fractal Design & Silverstone
Anything else is just a big no.

 

[S_Bartfast]

A live & learn experience mate unfortunately.

Never ever buy a case with an included psu unless you either really like the case & plan to replace the psu or you're building a basic desktop not a gaming machine.

The only 2 case manufacturers that put half decent psu's in their cases as a buying option are Fractal Design & Silverstone
Anything else is just a big no.

Arrrrr!
Man, so disappointed.

I wasn't even really trying to save money with that case. I got it because it seemed like a good choice. The brochure even says "Compatible PSU, with 6-pin PCI-E connector included to support high-end graphic card". Yes, I see now it is exactly that 6-pin connecter that does not support my graphics card but I specifically chose that case/power supply because I thought it was a perfect fit, and the store I got it from confirmed that it was.

As it is I don't even mind buying a new power supply (or even a new case and a new power supply for that matter). The problem is that there is just nowhere I can get one from till after the weekend. So frustrating!

Your avitar nails it MadMatt...

 

[madmatt30]

^ yeah don't do that mate or you'll need a new monitor aswell ;-)

We've all been there & done similar at one point in time - I still have my coolermaster case that came with a 750w PSU from 6 years ago.
Thought I was getting a bargain for $100 but what I really got in truth was a $40 case & a $40 psu for $20 extra ;-)

If you're keeping the case & bought an Intel setup with integrated graphics you could at least build it up roughly, install windows , leave the 1070 out & be ready for a new PSU.

 

[lolzdj]

If I have a 650 watt psu and am in a similar situation, would it still work?

 

[hilary.schultz.byard]

*

 

[samer.forums]

use this cable if you only have 6 pins cables , this will take power from two separate 6 pins cables, so it is safe and will add power and not share it.

https://www.amazon.com/GutsParker-6-Pin-Female-8-Pin-Cable/dp/B01J77U34Y

 

[samer.forums]

If I have a 650 watt psu and am in a similar situation, would it still work?

use this cable if you only have 6 pins cables , this will take power from two separate 6 pins cables, so it is safe and will add power and not share it.

https://www.amazon.com/GutsParker-6-Pin-Female-8-Pin-Cable/dp/B01J77U34Y

 

[DSzymborski]

If I have a 650 watt psu and am in a similar situation, would it still work?

What is the *exact* PSU. There are excellent 650W PSUs, there are good 650W PSUs, there are lousy 650W PSUs, and there are 650W PSUs that are literally garbage.

 

[madmatt30]

If you have a 650w labelled PSU that doesn't have at least 2 x 6+2 pins let alone just a single 6 pin then it isn't a 650w PSU.

 

[samer.forums]

If you have a 650w labelled PSU that doesn't have at least 2 x 6+2 pins let alone just a single 6 pin then it isn't a 650w PSU.

some older power supplies used to come with only 6 pins cables , but several independent ones. and well above 600 watts remember that 8 pins came later . 6 pins came first.

 

[madmatt30]

^ this is true upto a point , however consider that even a 2011/2012 seasonic s12 520w has a 8 pin & a 6 pin & I'd still say irregardless that if a 650w labelled PSU doesn't have a 6+2 pin its either absolutely ancient or is not a very good PSU at all.

I'd have no-issue running 2 x 6 pins to a single 8 pin if the card requires just an 8 pin connection
.
I would not consider running a 8+6 pin GPU from it though.