Bigdrago
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Hi. I have 19 radeon 570 I want to power with three EVGA G2 1600W (the last one also power motherboard). 7x 570 on each G2 1600 and 5x 570 on the last 1600w. (The 570 have a 6pin + 8pin power input, but I guess it is enough to just use the 8pin since the 6pin is "optional"). How much power can I draw from each VGA, CPU and SATA port on the PSU? Do all port give the same amount of power? But how to power the 008 risers? Can I plugin a 6pin to the PSU to a 6pin on the riser? Is those cables included? (I am not going to use the SATA adapters, I'm going to draw power from a port to molex and/or 6pin to the riser)  
post edited by Bigdrago - 2018/01/09 13:26:53
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/09 12:38:08
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Noone?
How much power can I draw from each VGA, CPU and SATA port on the PSU? Do all port give the same amount of power?
I thought the EVGA G2 1600W could solve all my problems...and here I am at home with three of them.
Does 8pin CPU provide the same power as 8pin VGA?
Can I connect 4pin molex or 6pin from riser to 6pin SATA, 8pin CPU or 8pin VGA?
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bcavnaugh
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/09 13:24:33
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"Is the power from SATA and CPU the same as VGA?" NO!
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/09 14:56:36
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Maybe this is the solution 5x on each psu gives me 4 free vga ports on each. 7x on the last psu gives me 2 free vgs ports. Is it possible to buy a 8-pin to 2x6-pin PCI-E cable to plug into the VGA-slot on PSU to the riser? 2 riser on each port. Or maybe a cable 8-pin to 2x 8-pin ?
post edited by Bigdrago - 2018/01/09 15:04:47
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/13 11:24:30
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Is it possible to connect a gpu and riser on the same cable?
5 of the vga cables have ´8-pin to 8-pin & 6+2pin´.
I use the 8pin for gpu and 6pin for riser?
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Sajin
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/13 12:10:18
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Bigdrago
Is it possible to connect a gpu and riser on the same cable?
5 of the vga cables have ´8-pin to 8-pin & 6+2pin´.
I use the 8pin for gpu and 6pin for riser?
Yes, but you must stay below 288w on the cable.
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/13 12:18:06
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Should be no problem :)
The card draw 100-150 and the riser max 75.
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/15 10:37:09
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Sajin
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/15 10:40:54
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QuintLeo
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Re: Is the power from SATA and CPU the same as VGA?
2018/01/20 19:02:20
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☄ Helpfulby Bigdrago 2018/02/03 02:53:55
PS 2 and 3 - connect 7 cards via VGA ports - this allows you to use the 8+6 cables to connect both power connectors "just to be sure" on as many cards as you have those cables for.
Connect 2 risers via PCI-E cables to the last 2 VGA ports.
Connect the other 5 risers to SATA/Periph ports via MOLEX (SATA and Periph ARE interchangeable on the G2/P2/T2 series EVGA supplies).
PS 1 - connect 5 cards via VGA ports.
Connect 4 risers via PCI-E cables to VGA ports.
Connect the riser to 1 SATA/Periph port via MOLEX.
That leaves you 4 periph/sata ports to power any hard drive and other accessories you might need, or you could use some of the "spares" in place of VGA/PCI-E to power risers via MOLEX if you choose.
Power the motherboard CPU port from this CPU as well.
I am presuming you are using the ASUS B250 Mining Expert motherboard, in which case plug PS 1 into A, PS 2 into B, and PS 3 into C for the ATX power connectors.
You are also going to encounter the issue that you CAN'T run 19 "regular" cards on that board, it flat out won't boot - at least 6 of them have to be "mining-specific" cards and ASUS specs those as being "P106 mining cards", though IN THEORY the new P104 mining cards should also work and *VERY TENTATIVELY BUT NOT VERIFIED BY ANYONE TO DATE* it might work with AMD mining-specific cards that also deleted all of their video output circuitry.
This appears to be some sort of very weird limitation of the ASUS BIOS, as the board flat out won't even BOOT with too many "regular" cards connected to it.
At this point NOBODY outside of ASUS have a clue why the limitation exists, and ASUS isn't talking about the subject.
Now that vorsholk has stopped his abuse, I'm returning to folding. I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again. 
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/03 02:53:50
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Wow, thanks QuintLeo.
You are right. Using b250 mining expert. I will use 13 gpu on it and 2x g2 1600w.
6 GPU on PSU1 (and 6 risers on the last 3 ports) and 7 gpu on PSU2 (1gpu and 1riser on each port, 8ping to gpu and 6pin to riser).
Would u still recommend using power from SATA port to MOLEX on riser? I have read that sata port dont have a lot of power and seen some cases of fire.
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QuintLeo
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/03 16:06:59
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The "sata" and "peripheral" ports on the EVGA G2/P2/T2 line are stated by EVGA to be "identical" and will handle one riser with NO issue safely.
2 risers per port on the PS might be an issue, EVGA doesn't rate it high enough to handle that and the wiring probably isn't heavy enough as well.
Powering 2 risers from a PCI-E port is plenty safe, the only issue there is that the "dual cables" are a little short to be able to space the risers for GOOD cooling, but they're probably enough to provide adaquate cooling space for cards that are not being pushed.
I would NOT try to do that if I was using something WIDE like the Gigabyte Aoris line, as it would NOT be enough space for decent cooling - but for RX 570s likely pulling 120-140 watts or less and 2 slots wide it should work OK.
I'd probably go ahead and use some Molex riser power though JUST to space the cards out better.
Now that vorsholk has stopped his abuse, I'm returning to folding. I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
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john.salvo
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/10 20:17:14
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QuintLeo
PS 2 and 3 - connect 7 cards via VGA ports - this allows you to use the 8+6 cables to connect both power connectors "just to be sure" on as many cards as you have those cables for.
Connect 2 risers via PCI-E cables to the last 2 VGA ports.
Connect the other 5 risers to SATA/Periph ports via MOLEX (SATA and Periph ARE interchangeable on the G2/P2/T2 series EVGA supplies).
PS 1 - connect 5 cards via VGA ports.
Connect 4 risers via PCI-E cables to VGA ports.
Connect the riser to 1 SATA/Periph port via MOLEX.
That leaves you 4 periph/sata ports to power any hard drive and other accessories you might need, or you could use some of the "spares" in place of VGA/PCI-E to power risers via MOLEX if you choose.
Power the motherboard CPU port from this CPU as well.
I am presuming you are using the ASUS B250 Mining Expert motherboard, in which case plug PS 1 into A, PS 2 into B, and PS 3 into C for the ATX power connectors.
You are also going to encounter the issue that you CAN'T run 19 "regular" cards on that board, it flat out won't boot - at least 6 of them have to be "mining-specific" cards and ASUS specs those as being "P106 mining cards", though IN THEORY the new P104 mining cards should also work and *VERY TENTATIVELY BUT NOT VERIFIED BY ANYONE TO DATE* it might work with AMD mining-specific cards that also deleted all of their video output circuitry.
This appears to be some sort of very weird limitation of the ASUS BIOS, as the board flat out won't even BOOT with too many "regular" cards connected to it.
At this point NOBODY outside of ASUS have a clue why the limitation exists, and ASUS isn't talking about the subject.
I, too, was looking for information on correctly connecting my EVGA PSU + ASUS B250 Mining Export + GPUs + risers. The big difference is that, I only have an EVGA 1000 P2 PSU ( which only has 6 VGA out ), and with the supplied cables, it seems like I can only supply power to 2 GPUs + 2 risers ( + mobo + CPU + SSD ) from this PSU due to the type of cables supplied and the overall power rating of the GPUs + risers. I have a Sapphire Nitro+ Radoen RX 580, which according to the specs, have: 1) 1 x 8-pin + 1 x 6-pin (optional) AUX Power Connector ( Another question really is .. how OPTIONAL is supplying power to the 1 x 6-pin AUX Power Connector really ? The manual / specs does not say ). 2) Power consumption of <235W - The EVGA 1000 P2 PSU only have 2 cables labeled "VGA" with [ 1 x 8-pin + 1 x 6-pin ], so that's 2 out of 6 VGA output used. - Then supply power to the two GPU risers ( each with 6-pin power connector ) cables supplied cables labeled "VGA", so that's 4 out of 6 VGA output used .. only 2 VGA output usable left. I suppose I can supply power to another another GPU + riser, using up all 6 VGA output on the PSU, ( 235W * 3 = 705W .. or if we use 288W * 3 = 864W, leaving only a few room for the motherboard, CPU, SSD ) .. but I do not have any "VGA" cables left with [ 1 x 8-pin + 1 x 6-pin ] at the other end... but that's OK for now, as I do not have 3 GPUs anyway, only 2 so far at the moment.
post edited by john.salvo - 2018/02/10 20:21:54
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john.salvo
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/10 20:45:18
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In connection to what I posted earlier, assuming I buy an EVGA 1600 PSU .... which means I would have BOTH an EVGA P1000 and an EVGA P1600 PSU to supply power to the ASUS B250 Mining Expert: 1) I would supply power from the EVGA P1600 PSU to the first 24-pin ATX ( called EXTPWR_A on the motherboard ) + CPU + SSD + 5 GPUs + 5 risers 2) I would supply power from the EVGA P1000 PSU to the second 24-pin ATX ( called EXTPWR_B on the motherboard ) + 3 GPU + 3 risers Will both PSUs turn on and turn off at the same time from the power switch button ? Is there a need to "connect" the 24-pin ATX connectors from the PSU together, like an adapter of some sort ? If so, how would I connect them together ( which one goes where ? ) Should ALL the risers be powered from the first PSU, even if the GPU that the riser is connected to is powered from the second PSU ?? Reason I ask this last question is that the ASUS B250 mining export motherboard itself has 3 x 4-pin molex connectors that supplies power to the PCIe ports. These three 4-pin molex connectors must supply power from the first PSU, the same PSU connected to the first 24-pin ATX power of the motherboard, so I assume that the risers ( assuming first that the risers are connected, powered, but no GPUs attached ), must therefore also be supplied from the first PSU.
post edited by john.salvo - 2018/02/10 21:06:04
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john.salvo
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/11 01:12:05
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With regards to my question earlier if ALL the risers attached to the ASUS B250 should be powered from the same PSU ( the first PSU ), or if the risers should be powered from the same PSU which supplies power to the GPU card to which the riser is attached to, I read at the following forum from someone who claims to be an electrical engineer: forum.z.cash/t/the-facts-about-gpu-mining-electrical-specifications/19468 ( Attached the https protocol on front above as the EVGA forum restricts posting of external URLs ) , it says: "Having said that, each GPU should be powered from one PSU (both riser and 8 or 6 pin connector). IF you power the riser from the mobo PSU and the 6 or 8 pin connector from a different PSU you can potentially tie together the 12V rail from two PSU's. They will fight to regulate the 12V rail if they are just a little bit off. No one, especially you, wins that battle. This can cause melted cables and fires." So that basically says one should power the risers from the same PSU that supplies power to the GPU card to which the riser is attached to.... so what's the purpose of the extra 4-pin molex connectors that supplies power to the PCIe slots ????
post edited by john.salvo - 2018/02/11 01:14:30
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QuintLeo
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/11 01:16:16
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EVGA will sell you more of those 8 + 6 VGA power cables, though I'm not sure on the pricing - I've seen conflicting pricing in posts on the subject.
I'm not sure if you HAVE to use the 6 pin on the Nitro, the only ones I have are the "mining specific" versions that ONLY have a single 8-pin connector - but most cards require both power connectors to be used to run at all.
For mining usage (with exceptions for the 1080 ti and Vega), multi-power connector cards tend to be a waste of money and a hassle to install in a multi-card rig DUE TO the excessive number of power connectors needed.
If your risers are PCI-E power only, you could use a Molex to PCI-E adapter to power a riser with from a Peripheral/SATA port on the power supply.
Don't go more than one riser per Periph/SATA port though, EVGA doesn't rate the port high enough to run 2+ risers from one port even if the wiring WILL support it.
Now that vorsholk has stopped his abuse, I'm returning to folding. I no longer MOO due to abuses by certain "whales" in the Gridcoin community - so I now work the Distributed.net project directly again.
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Bigdrago
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Re: Is the power from SATA and CPU the same as VGA?
2018/02/13 12:45:22
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On my radeon I only use the 8pin connector, the other 6pin connector on the same cable power the riser.
I will use a splitter on the cable that only have 8pin (from 8pin to 8pin+6pin) to power the rest of the cards and risers.
The riser and gpu need to powered from the same psu.
You do not need to connect the psu to each other. Just use the connectors on the mobo.
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