Topic: PCI-E splitters don't work!! (Read 485 times)
Found out that only the 8-pin to 2x-8-pin splitters don't work. The 6-to-8 adapters are fine, so phew, I have just enough cables and that PSU will do the job just fine!
i've been where you are.
ended up with 2 EVGA 1600 to power 8 VEGA64's on an ASUS B250mining mb (overkill), thinking i would add VEGA64's with the ASUS update to support more than 8 VEGA's on this mb
i am also using GQ 6 - 6+2x2cables from the 2 EVGA 1000 i also bought(but you cant use G2 cables on these only GQ). Each card is using around 180W (with -20 voltage and other tweeks on wattman ) and achieving a very stable 43,7MH/s on each GPU
whatever you do, if using more than 1 PSU for 1 rig, make sure they are identical otherwise you will propably have problems
happy mining
ended up with 2 EVGA 1600 to power 8 VEGA64's on an ASUS B250mining mb (overkill), thinking i would add VEGA64's with the ASUS update to support more than 8 VEGA's on this mb
i am also using GQ 6 - 6+2x2cables from the 2 EVGA 1000 i also bought(but you cant use G2 cables on these only GQ). Each card is using around 180W (with -20 voltage and other tweeks on wattman ) and achieving a very stable 43,7MH/s on each GPU
whatever you do, if using more than 1 PSU for 1 rig, make sure they are identical otherwise you will propably have problems
happy mining
They're under constant load, yes, but at lower voltage. Mining cryptonight also so there will be no way near 300W load per cable. Not even 200 if reports of miners using Vega are to be believed.
Phil, thanks a lot for the links and suggestions, much appreciated. If I can't get the EVGA to work, I'll get the Corsair... Or a couple of 850's.
Phil, thanks a lot for the links and suggestions, much appreciated. If I can't get the EVGA to work, I'll get the Corsair... Or a couple of 850's.
By rail I mean the PCI-E connector on the PSU. The rated power specification for a PCI-E 8-pin connector is up to 150 W and 75 W for a 6-pin connector. No PSU PCI-E connector or cable is designed to pull 300 W from a single connector.
I like when people quote stuff from 2005 and think its correct.
What you may like and what reality is are two different things. The PCI-E System Power Delivery Requirements (page 14) calls for 12.5A from a 2x4 connector (8-pin) and 6.25A from a 2x3 connector (6-pin)
https://us.v-cdn.net/5021640/uploads/editor/yr/f1z842765sj9.pdf
12.5A x 12V = 150 W
16AWG cables can provide up to 400w. Modern day PSU's provide these and give you dual 6-8pin connections on one cable. Stop regurgitating old google info.
Where are you getting 16 AWG cable can provide up to 400 W? According to this wire capacity chart the maximum rating for 16 AWG cable is 20A for a short run which at 12V is 240 W. Stop claiming your fantasies as fact, it's dangerous. The fact that some PSU's come with dual 8-pin PCI-E cables and connectors which ARE intended for 150W each, doesn't mean it's a good idea to use them for a mining rig which is under constant high load 24/7.
20 A x 12 V = 240 W
http://www.rowand.net/shop/tech/wirecapacitychart.htm
By rail I mean the PCI-E connector on the PSU. The rated power specification for a PCI-E 8-pin connector is up to 150 W and 75 W for a 6-pin connector. No PSU PCI-E connector or cable is designed to pull 300 W from a single connector.
I like when people quote stuff from 2005 and think its correct.
What you may like and what reality is are two different things. The PCI-E System Power Delivery Requirements (page 14) calls for 12.5A from a 2x4 connector (8-pin) and 6.25A from a 2x3 connector (6-pin)
https://us.v-cdn.net/5021640/uploads/editor/yr/f1z842765sj9.pdf
12.5A x 12V = 150 W
16AWG cables can provide up to 400w. Modern day PSU's provide these and give you dual 6-8pin connections on one cable. Stop regurgitating old google info.
Hey phil good info.
I have a follow up
It has two double headed pcies and 6 single pcies,
So he buys a few dual headed say 3 giving him 2 spares.
He has three dual plugged in and six single.
So send a single to each of the 6 cards.
Then use each dual on 2 cards.
This means 1.5 cables per card.
1 Single and 1/2 of a dual.
It should provide the best power possible to each card.
I have a follow up
It has two double headed pcies and 6 single pcies,
So he buys a few dual headed say 3 giving him 2 spares.
He has three dual plugged in and six single.
So send a single to each of the 6 cards.
Then use each dual on 2 cards.
This means 1.5 cables per card.
1 Single and 1/2 of a dual.
It should provide the best power possible to each card.
send the psu back
buy this one
http://www.corsair.com/en-us/ax1500i-digital-atx-power-supply-1500-watt-fully-modular-psu
I will link the proper cables
look at this photo
10 jacks use 1 for your cpu cable use nine for pcie
corsair sells pcie cables with 2 8 pin heads
I will find link
buy this one
http://www.corsair.com/en-us/ax1500i-digital-atx-power-supply-1500-watt-fully-modular-psu
I will link the proper cables
look at this photo
10 jacks use 1 for your cpu cable use nine for pcie
corsair sells pcie cables with 2 8 pin heads
I will find link
comes with
Cabling - Corsair AX1500i
Type of Cable Length from PSU
Modular Cables
20+4 pin ATX connector 700mm
4+4 pin EPS/ATX12V 800mm
4+4 pin EPS/ATX12V 650mm
6+2 pin PCI-E, 6+2 pin PCI-E 700+150mm
6+2 pin PCI-E, 6+2 pin PCI-E 700+150mm
6+2 pin PCI-E 650mm
6+2 pin PCI-E 650mm
6+2 pin PCI-E 650mm
6+2 pin PCI-E 650mm
6+2 pin PCI-E 800mm
6+2 pin PCI-E 800mm
5.25" to 3.5" adapter 100mm
5.25" to 3.5" adapter 100mm
5.25"+5.25"+5.25"+5.25" 450+100+100+100mm
5.25"+5.25"+5.25"+5.25" 450+100+100+100mm
5.25"+5.25"+5.25"+5.25" 450+100+100+100mm
SATA+SATA+SATA+SATA 550+95+95+95mm
SATA+SATA+SATA+SATA 550+95+95+95mm
SATA+SATA+SATA+SATA 500+95+95+95mm
SATA+SATA+SATA+SATA 500+95+95+95mm
SATA+SATA+SATA+SATA 500+95+95+95mm
I2C 800mm
Mini USB to USB Mainboard Header 800mm
Unit Dimensions (L x W x H)
224mm x 150mm x 86mm
has 6 single cables
has 2 double cables
has room for 1 more cable
buy a few
http://www.corsair.com/en-us/type-3-flat-black-ribbon-cable-pcie-6-2-pin-dual-connectors-compatible-with-all-type-3-pin-out-psu
By rail I mean the PCI-E connector on the PSU. The rated power specification for a PCI-E 8-pin connector is up to 150 W and 75 W for a 6-pin connector. No PSU PCI-E connector or cable is designed to pull 300 W from a single connector.
I like when people quote stuff from 2005 and think its correct.
What you may like and what reality is are two different things. The PCI-E System Power Delivery Requirements (page 14) calls for 12.5A from a 2x4 connector (8-pin) and 6.25A from a 2x3 connector (6-pin)
https://us.v-cdn.net/5021640/uploads/editor/yr/f1z842765sj9.pdf
12.5A x 12V = 150 W
send the psu back
buy this one
http://www.corsair.com/en-us/ax1500i-digital-atx-power-supply-1500-watt-fully-modular-psu
I will link the proper cables
look at this photo
10 jacks use 1 for your cpu cable use nine for pcie
corsair sells pcie cables with 2 8 pin heads
I will find link
buy this one
http://www.corsair.com/en-us/ax1500i-digital-atx-power-supply-1500-watt-fully-modular-psu
I will link the proper cables
look at this photo
10 jacks use 1 for your cpu cable use nine for pcie
corsair sells pcie cables with 2 8 pin heads
I will find link
By rail I mean the PCI-E connector on the PSU. The rated power specification for a PCI-E 8-pin connector is up to 150 W and 75 W for a 6-pin connector. No PSU PCI-E connector or cable is designed to pull 300 W from a single connector.
I like when people quote stuff from 2005 and think its correct.
By rail I mean the PCI-E connector on the PSU. The rated power specification for a PCI-E 8-pin connector is up to 150 W and 75 W for a 6-pin connector. No PSU PCI-E connector or cable is designed to pull 300 W from a single connector.
Maybe you got the wrong type of splitters and they are shorting the PSU?
But those powerful PSUs are single rail... And EVGA is providing dual 8-pin cables with the 750GQ's so it can't be that bad? But if all that fails I suppose I'm going to have to send back that 1600G2 and get something else. Although that does sound a bit fukced up.
Never use a PCI-E 8-pin splitter to power dual 8-pins. That's a good way to overload your PSU cable and rail with close to 300 W. I use PCI-E splitter cables with 8-pin + 6-pin on the same GPU or with dual 6-pin for risers but never with dual 8-pin connectors.
You either need to add another PSU with enough PCI-E connectors for the VGA inputs and use a dual ATX splitter cable so they come on and off together or use a large enough server PSU with enough PCI-E connectors and a Pico adapter for the 24-pin, CPU and Sata connectors.
https://www.aliexpress.com/item/2017-New-Arrival-30cm-24Pin-Dual-PSU-ATX-Power-Supply-Sync-Starter-Extender-Cable-For-BTC/32825280357.html?
You either need to add another PSU with enough PCI-E connectors for the VGA inputs and use a dual ATX splitter cable so they come on and off together or use a large enough server PSU with enough PCI-E connectors and a Pico adapter for the 24-pin, CPU and Sata connectors.
https://www.aliexpress.com/item/2017-New-Arrival-30cm-24Pin-Dual-PSU-ATX-Power-Supply-Sync-Starter-Extender-Cable-For-BTC/32825280357.html?
So I got myself an Onda D1800 board with 6 powered slots. To juice it up and the six Vegas that I plugged onto it I got an EVGA 1600 G2.
Unfortunately it doesn't have enough PCI-E connectors. It's got a few single 8pin and some 8+6 pin connectors. Unfortunately every Vega needs 2x 8pin each.
So I got myself a few 6-to-8 connectors and 8-to-2x8 splitters/adapters.
But to my great displeasure, the PSU won't power up at all if ANY of these are used!!
Dafuq?
Why? WHY? What do I do now?? EVGA don't sell connectors afaik!...
Unfortunately it doesn't have enough PCI-E connectors. It's got a few single 8pin and some 8+6 pin connectors. Unfortunately every Vega needs 2x 8pin each.
So I got myself a few 6-to-8 connectors and 8-to-2x8 splitters/adapters.
But to my great displeasure, the PSU won't power up at all if ANY of these are used!!
Dafuq?
Why? WHY? What do I do now?? EVGA don't sell connectors afaik!...
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