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Author Topic: PSU and GPU question  (Read 457 times)
Dhodge87 (OP)
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August 20, 2017, 10:54:11 PM
Last edit: August 21, 2017, 01:01:20 AM by Dhodge87
 #1

Dunno where else to ask this.

I was wondering is it possible to power a GPU such as a gtx 1060 from the PSU's CPU cable?
I saw that a CPU 8pin to vga 6+2 pin exists, but will it draw to much power?
http://www.thermaltake.com/Power_Supply/Accessories_/PSU_Cable/C_00002413/CPU_8Pin_to_Dual_PCI_E_6_2Pin_Splitter_Cable/design.htm

https://i.imgur.com/yxVSIrX.jpg
philipma1957
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August 20, 2017, 11:15:54 PM
 #2

Dunno where else to ask this.

I was wondering is it possible to power a GPU such as a gtx 1060 from the PSU's CPU cable?
I saw that a CPU 8pin to vga 6+2 pin exists, but will it draw to much power?



Of  course it works assuming you get the neg and pos correct .

Your photo has no info on a special cable. So you better understand how to be sure your wires don't cross

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 MΞTAWIN  THE FIRST WEB3 CASINO   
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.. PLAY NOW ..
Dhodge87 (OP)
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August 21, 2017, 12:16:29 AM
Last edit: August 21, 2017, 01:00:26 AM by Dhodge87
 #3

Dunno where else to ask this.

I was wondering is it possible to power a GPU such as a gtx 1060 from the PSU's CPU cable?
I saw that a CPU 8pin to vga 6+2 pin exists, but will it draw to much power?

https://i.imgur.com/yxVSIrX.jpg

Of  course it works assuming you get the neg and pos correct .

Your photo has no info on a special cable. So you better understand how to be sure your wires don't cross

That is just the stock PSU pic.
The cables appear to be all over.

Here is where I first saw it
http://www.thermaltake.com/Power_Supply/Accessories_/PSU_Cable/C_00002413/CPU_8Pin_to_Dual_PCI_E_6_2Pin_Splitter_Cable/design.htm

Here's one on eBay.
https://www.ebay.com/itm/272720358725

I'm also debating about using a server PSU such as the dps-1200 as the second in my next build, but my concern is how do I sync it to the first PSU?

I don't have a problem redoing the pins if I have to.
Where would I find the pin lawout?
I suppose I could strip the sleeve from the Evga cables and match them accordingly.
CaVO32
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August 21, 2017, 01:59:57 AM
 #4

simply check your pinouts of both the cpu and the gpu cable and also the pinouts of the psu if all is identical then i would presume you could do that with no issue other then the fact that the cpu might be on a separate rail and could be a lower power exit then a normal pcie output
voltartist
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August 21, 2017, 02:05:04 AM
 #5

CPU plug is rated for 225W, VGA 6+2 pin is rated for 150W.
philipma1957
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August 21, 2017, 02:24:53 AM
 #6

Dunno where else to ask this.

I was wondering is it possible to power a GPU such as a gtx 1060 from the PSU's CPU cable?
I saw that a CPU 8pin to vga 6+2 pin exists, but will it draw to much power?



Of  course it works assuming you get the neg and pos correct .

Your photo has no info on a special cable. So you better understand how to be sure your wires don't cross

That is just the stock PSU pic.
The cables appear to be all over.

Here is where I first saw it
http://www.thermaltake.com/Power_Supply/Accessories_/PSU_Cable/C_00002413/CPU_8Pin_to_Dual_PCI_E_6_2Pin_Splitter_Cable/design.htm

Here's one on eBay.
https://www.ebay.com/itm/272720358725

I'm also debating about using a server PSU such as the dps-1200 as the second in my next build, but my concern is how do I sync it to the first PSU?

I don't have a problem redoing the pins if I have to.
Where would I find the pin lawout?
I suppose I could strip the sleeve from the Evga cables and match them accordingly.

the thermal take cable looks good.  in fact I am going to order and test it for you







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.
 MΞTAWIN  THE FIRST WEB3 CASINO   
.
.. PLAY NOW ..
Dhodge87 (OP)
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August 21, 2017, 02:29:13 AM
 #7

Dunno where else to ask this.

I was wondering is it possible to power a GPU such as a gtx 1060 from the PSU's CPU cable?
I saw that a CPU 8pin to vga 6+2 pin exists, but will it draw to much power?

https://i.imgur.com/yxVSIrX.jpg

Of  course it works assuming you get the neg and pos correct .

Your photo has no info on a special cable. So you better understand how to be sure your wires don't cross

That is just the stock PSU pic.
The cables appear to be all over.

Here is where I first saw it
http://www.thermaltake.com/Power_Supply/Accessories_/PSU_Cable/C_00002413/CPU_8Pin_to_Dual_PCI_E_6_2Pin_Splitter_Cable/design.htm

Here's one on eBay.
https://www.ebay.com/itm/272720358725

I'm also debating about using a server PSU such as the dps-1200 as the second in my next build, but my concern is how do I sync it to the first PSU?

I don't have a problem redoing the pins if I have to.
Where would I find the pin lawout?
I suppose I could strip the sleeve from the Evga cables and match them accordingly.

the thermal take cable looks good.  in fact I am going to order and test it for you


http://www.thermaltake.com/db/products/PSU_Cable/CPU_8Pin_to_Dual_PCI-E%206+2Pin_Splitter_Cable/main.jpg


http://www.thermaltake.com/db/products/PSU_Cable/CPU_8Pin_to_Dual_PCI-E%206+2Pin_Splitter_Cable/pic1.jpg


Well then I'll wait for your results!!
philipma1957
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August 21, 2017, 02:37:48 AM
 #8

went to buy it at amazon can't and reviews show sometimes it is wired backwards


https://www.amazon.com/Thermaltake-8-Pin-2-Pin-Splitter-AC-006-CNONAN-P1/product-reviews/B00O0M6WIS


so I would be very careful about using it.  I can't find it to review it.

but if I found it I would test it with a meter before i use it.

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.
 MΞTAWIN  THE FIRST WEB3 CASINO   
.
.. PLAY NOW ..
Dhodge87 (OP)
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August 21, 2017, 03:17:30 AM
 #9

went to buy it at amazon can't and reviews show sometimes it is wired backwards


https://www.amazon.com/Thermaltake-8-Pin-2-Pin-Splitter-AC-006-CNONAN-P1/product-reviews/B00O0M6WIS


so I would be very careful about using it.  I can't find it to review it.

but if I found it I would test it with a meter before i use it.

I just read the reviews, it looks like there are 2 versions. One before 2015 that is basically a Y splitter and one from 2016 onward that is an actual adaptor.

I may buy one of the $2 cables on eBay and give it a shot with my multimeter, then test it on an older PSU and GPU.
philipma1957
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August 21, 2017, 03:21:27 AM
 #10

went to buy it at amazon can't and reviews show sometimes it is wired backwards


https://www.amazon.com/Thermaltake-8-Pin-2-Pin-Splitter-AC-006-CNONAN-P1/product-reviews/B00O0M6WIS


so I would be very careful about using it.  I can't find it to review it.

but if I found it I would test it with a meter before i use it.

I just read the reviews, it looks like there are 2 versions. One before 2015 that is basically a Y splitter and one from 2016 onward that is an actual adaptor.

I may buy one of the $2 cables on eBay and give it a shot with my multimeter, then test it on an older PSU and GPU.

yeah  multimeter is a must.  as you do not want to attach it to a pcie cable coming from the psu.  pop  since it would adapt and split if it was built for a cpu cable.

but I can see where a good one would be nice for evga  since most evga are 1 rail 12 volt and have 2 cpu plugs.

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.
 MΞTAWIN  THE FIRST WEB3 CASINO   
.
.. PLAY NOW ..
Dlugina23
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August 21, 2017, 04:45:25 AM
 #11

What is the reason ?
Dhodge87 (OP)
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August 21, 2017, 04:51:03 AM
 #12

What is the reason ?

I'm trying to avoid using a third PSU because I lack enough plugs/cables especially when I'm only using 60% of the wattage.
My second EVGA platinum PSU had 2 unused CPU ports, if those are a viable option to power my GTX cards then I'd rather use those instead of trying to run 3 PSU's.

From what I've read the CPU ports have more than enough power to run 2 GTX cards each, that'll put me at 8 cards on this PSU with 5 on the other maxing me out at 13. On top of that I'll be at about 80% usage.
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