Can I use 6+8 pin from my PSU to 2x8 pin required by VGA ?

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ItsmeAJ

Commendable
Jun 7, 2016
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Hi,

Few months ago I bought Andyson M5+ 650W PSU which comes with 6 pin + 8 pin PCIE connectors for VGA. At that time I used RX 480 which required only a single 8 pin from the PSU.

Now I upgrade to Aorus 1080ti which requires 2x8 pin PCIE, I wonder can I just use 6 + 8 pin from PSU on 8 + 8 pin on this VGA ? Or I have to change PSU ... ?

The card comes with a single 2x6 pin to 8 pin adapter for extra information and nothing more. Still have the card unplugged here before I have enough information 🙁
 
Solution
Karadjgne
That card is capable under OC conditions of actual power consumption of at least 316w. The reason it uses 2x8pin and will not and should not be used with any 6pin converter is that you are demanding too much power. The math might add up but reality is the math is wrong. (gonna use rough figures). At 300w, that's 225w through the pcie connectors. They are run in parallel, meaning both link up to the same spot at the end. So that's 225w split evenly between the 2 connectors. That's not going to be a nice 150/75w split, that's going to be a 113w draw on each lead. The 150w 8pin can handle that easily, it's got 3x 60w capability. The 6pin (regardless of the 75w rating) has 2 hots, with a 5A (60w rating on each wire). Pulling 113w through...
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The adapter is to turn two 6 pin connectors into one 8 pin, so that won't help you. Your 1080 Ti requires two 8 pin connectors. I can't find any English information on that power supply, so going by what you say it has one 6 pin connector and one 8 pin connector.

So you need a new power supply, one with two 8 pin connectors, if you want to power this videocard. Always, ALWAYS, verify you can power a card before you spend money on it.
 
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The poster is right. A 2x8 pin PCI is not compatible with the CPU's voltage. You can't just switch around voltages on pins and get things to work. That's why they're labeled as such.. PCI pins and CPU pins..
You prolly need to upgrade your PSU to one that has two dedicated PCI 2x8 pin connectors.
 
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It's 80 Plus Bronze PSU, you can see images about the PSU in this link, other review's text isn't in English

https://vozforums.com/showthread.php?t=5522822

As 650W it could handle well this 1080ti which consumes ~ 250-270W at max (not max OC ) from what I read here : http://www.tomshardware.co.uk/aorus-gtx-1080-ti-xtreme-edition,review-33896-4.html

The problem is just my PSU lacks of 1 x 8 pin. As far as I know, the card will be powered from these sources

- 75W from mobo
- 150W (?) from 8 pin PCIE
- 75W from 6 pin PCIE

Total is 300W which around the max power consumption I've read...
 
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Read the recommendations of your power supply before you do this kind of stuff. Like some cards require dependent, not adapter, PCIE cables specifically. You're also running your processor, your fans, your hard drive, ram, etc. If your card requires two independent 8 pins then it simply requires it and there's nothing you can do. If in theory it would work you would be able to do it but you can't. You can try it and if it works great but if it doesn't work then its saying that it needs dedicated PSU PCI-E cables.

I had this issue before on a 660 ti, needed dedicated cables for both 6 pins or it wouldn't work.
 
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If you're sure your PSU can power the card, just be warned that components can get damaged if it fails....so decide if you want to risk that. The easiest solution is to buy a 6 pin to 8 pin adaptor. The only difference between the two is, the 6 pin has 3 live wires and 3 ground wires and the 8 pin has 3 live and 5 ground wires.
 
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Hi guys, I get it work.

Yesterday when I got home, I tried to plug 6+8 PCIE from PSU to the card which requires 8+8 PCIE, as expected it didn't work and there was error led at where 6 pin plug to the card, on the screen it told me to put PCIE connector to the card.

This morning I went to electronic store nearby and picked this cable : http://i.ebayimg.com/images/i/151501045756-0-1/s-l1000.jpg

It's 6 to 2 x 8 pin adapter and finally my 1080ti worked. Been testing it the whole day to make sure my PSU can handle the card and it did well.



 
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Low end PSU plus power adaptor over drawing one of its PCIE adaptors.

This is a recipe for failure. It may work for now, but seriously if you can afford a $700 GPU you can afford to spend $80-$100 on a PSU with proper connectors.

If you don't then I am just waiting for your next post about how your GPU got burnt (this literally just happened to someone here who did the same thing as you).
 
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ItsmeAJ I was once in a remotely similar situation. I had a Dell Precision workstation with a power supply that only have two 6 pin PCIe cables, but my new MSI GTX 970 4G Gaming card required a 6+8 pin connection to the PSU. In that case I used an adapter and felt completely comfortable. However I would not have risked doing the same with a GTX 980 Ti (or 1080 Ti).

I googled your PSU model and came across a forum thread (not a review) about the 550 watt version (http://www.jonnyguru.com/forums/showthread.php?t=14277). At the end of the thread, I came across the final user response:

tN7sBz2.jpg

^ Based on this lone comment, I queried EVGA BQ reviews on JonnyGuru and found this one for the 750 watt model (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=490). Based on this review, it's possible that the PSU is mediocre quality, although I notice that the BQ is semi-modular and the Andyson appears to be non-modular. I also attempted to look up the specs on Andyson's website, but the link for "specification" is broken and misspelled (http://www.andysonet.com/80-Plus-Bronze-600W-1.htm).

Just to be clear, I would never personally consider using your power supply plus adapter on a 1080 Ti. But I'm just trying to provide the information to you in an unbiased manner. Regards.
 
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That card is capable under OC conditions of actual power consumption of at least 316w. The reason it uses 2x8pin and will not and should not be used with any 6pin converter is that you are demanding too much power. The math might add up but reality is the math is wrong. (gonna use rough figures). At 300w, that's 225w through the pcie connectors. They are run in parallel, meaning both link up to the same spot at the end. So that's 225w split evenly between the 2 connectors. That's not going to be a nice 150/75w split, that's going to be a 113w draw on each lead. The 150w 8pin can handle that easily, it's got 3x 60w capability. The 6pin (regardless of the 75w rating) has 2 hots, with a 5A (60w rating on each wire). Pulling 113w through 120w will work. Barely. The unfortunate side affect of you pulling a 150w connection through a 75w choke is the sheer amount of heat created by that high of current.

End result will be burnt plastic at the weak point. If that's a weak solder inside the psu, your psu starts burning. If it a weak crimp at a pin, the wire starts melting. If it's a weak junction inside the connector, the connector melts. If it's a weak junction inside the 8pin at the gpu, You just fried a $700 gpu because of your insistence on using a 5¢ adaper

Food for thought: if a Corsair CXM 450w psu comes stock with 2x 6+2pin capability at 300w on 12v rail, what does that say about a 650w unit that only comes with a single 6pin and 6+2pin at 225w capability. Even my old Seasonic 520 has those pcie connectors. It only says 1 thing, that even the manufacturer has absolutely no faith in their 650w psu to deliver full rated power, so they cut down on possible user power.

Here's what cheap gets you.

https://youtu.be/f6snWfd1v7M
Dont rely on manufacturer claims of 650w, just because that's what the label says. In reality, that's closer to a 500w unit, At Best
 
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Solution


I'm sorry, I don't understand what you meant. I don't figure out what problem with my language yet. If there was, so tell me.

Did I post something you don't like, moderator ?
 
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Guess I'm going to get better PSU today, reading comments from you and others about later consequence may cause with this PSU, I'm not really happy with it...

 
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thanks for your advice, there's no EVGA distributor around my place, any recommendation on Seasonic or Corsair ?

I'm reading this : http://www.tomshardware.com/reviews/corsair-rm650x-psu,4611.html

Corsair RM650X looks ok to me, local store has it available on their website, I can go get it today

 
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I'm from Vietnam. And where I live, there are limited options to choose from. Local stores sell what they want to sell, not all good things like EVGA products. Some good products that I 've read from reviews don't have distributor here so if I want to buy some EVGA products, that would cost me a lot and likely abandon warranty because shipping fee cost too much.

My budget is around $150 for new PSU so I have my eyes on Corsair RM650X Gold Plus or FSP HYDRO G 650-80 PLUS GOLD

Here are website of local stores I can buy :

http://tanthanhdanh.vn/danh-muc/psu-nguon-may-tinh/

http://tandoanh.vn/collections/psu

Their prices are in Vietnamese Dong, if you want to exchange to U.S dollar, divide the VND price by 23.000

Like corsair RM650X costs 3.090.000/23.000 = $134
 
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I'm feeling so good to hear you said that about corsair RMx psu because I made a right choice

At the moment I read your comment, I already got myself a Corsair RM 650X 650W few minutes ago.

Thank you guy so much for helping me
 
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