Which risers do I need for corsair hx1000i mining

[Fozzy786]

Hi, I have bought the corsair hx1000i. 

 

I was just confused as to the maxiumum number of cards that can be used with this?

 

I believe it has 6 ports to power PCIE but one of those is used for the cpu?

 

Am I correct in thinking that this will mean that a maximum of 5 gpus can be used as one of the ports is used for the cpu on the motherboard?

Also, What risers would I need to work with this.

 

I currently have 3 1070's and plan to buy 2 or 3 more depending on the maximum i can run.

 

Do I connect the cards to the risers and power them using the psu 6+2 cables? Do the risers also need to be powered?

 

I have read that some use 4 pin molex power cables, where do they draw the power from?

 

Surely this psu wont have enough power lines on it to power 5 gpus + 5 risers?

 

Would appreciate any advice, thank you. 

[Jurrunio]

this?

http://www.corsair.com/en-eu/hxi-series-hx1000i-high-performance-atx-power-supply-1000-watt-80-plus-platinum-certified-psu

[Fozzy786]

1 minute ago, Jurrunio said:

this?

http://www.corsair.com/en-eu/hxi-series-hx1000i-high-performance-atx-power-supply-1000-watt-80-plus-platinum-certified-psu

Yes mate, i have purchased that.

 

It hasnt arrived yet so I am going off on pictures and what the spec says about how many modules it supports etc. 

[Jurrunio]

5 minutes ago, Fozzy786 said:

Yes mate, i have purchased that.

 

It hasnt arrived yet so I am going off on pictures and what the spec says about how many modules it supports etc. 

There are 8 6+2pin PCIe power cable (I believe it's two connectors per cable, so that uses 4 of the sockets on the PSU).

 

CPU power connector is not a PCIe power connector. It's a 4+4 pin which looks different, and you have 2 of them (16pins in total).

 

Risers? So you use a mining board?

 

Only use molex if you run out of PCIe. In that case you are likely pushing near the power limit of the PSU already.

[Fozzy786]

2 minutes ago, Jurrunio said:

There are 8 6+2pin PCIe power cable (I believe it's two connectors per cable, so that uses 4 of the sockets on the PSU).

 

CPU power connector is not a PCIe power connector. It's a 4+4 pin which looks different, and you have 2 of them (16pins in total).

 

Risers? So you use a mining board?

 

Only use molex if you run out of PCIe. In that case you are likely pushing near the power limit of the PSU already.

Yes it is for the purpose of mining. 

 

I have a Gigabyte Intel H110-D3A motherboard which supports of to 6 cards and has pci 1x slots. 

 

I'm just really confused on what risers I need?

 

Some people have said to avoid the 4 pin molex ones. Which ones do I need, any recommendations? 

[Jurrunio]

8 minutes ago, Fozzy786 said:

Yes it is for the purpose of mining. 

 

I have a Gigabyte Intel H110-D3A motherboard which supports of to 6 cards and has pci 1x slots. 

 

I'm just really confused on what risers I need?

 

Some people have said to avoid the 4 pin molex ones. Which ones do I need, any recommendations? 

PCIe x1 to x16 risers.

 

Only use molex powered the risers, each using a single molex. PCIe x16 gives a lot more power than X1, that's why the molex is needed since the cards will suck power from both the PCIe slot (as if it's x16, it doesnt care) and PCIe cable

[Fozzy786]

I'm sure I read somwhere to avoid the molex ones, but will go with them if that's what you are suggesting.

 

 

Ok just so I have got this straight.

 

I need 3 molex powered risers for my 3 gpus

 

All 3 cards use risers, each riser connects to ONE molex connector which in turn connects to ONE port on the PSU.

 

Then i use ONE PCIe 6+2 port to power each gpu, using a total of 3 for 3 cards.

 

Is this correct?

 

So the cards draw power from the PSU directly as well as from the riser which is getting power through a 4 pin molex? 

 

Lastly, which port on the PSU do the molex connect to? Are there enough ports on the PSU?

 

Sorry for all these noob questions. 

 

[Badabing]

I am very curious what config & risers work for you Fozzy. I am struggling with this myself

[Fozzy786]

26 minutes ago, Badabing said:

I am very curious what config & risers work for you Fozzy. I am struggling with this myself

Hi mate, so I spoke to a couple of different people and they recommended I use these risers. 

 

https://www.ebay.co.uk/itm/6Pcs-USB-3-0-PCI-E-Express-1x-To-16x-GPU-Extender-Riser-Card-Adapter-BTC-Cable/292300533830?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D20151005190705%26meid%3D81984fb2dae742c795743243a79bd884%26pid%3D100506%26rk%3D1%26rkt%3D1%26&_trksid=p2045573.c100506.m3226

 

They're meant to be a newer revision of the risers, they use sata cables to 6 pin molex for power. 

 

So the way it would work is, from your psu, you'd connect a maximum of 2 risers using ONE sata power cable. (each cable has multiple sata ports on them but only use 2 so you don't draw too much). 

 

Then you would use the PCIe cables to power your gpu as normal. 

 

So 6 cards would use 6 PCIe ports. 

 

2 risers would use 1 sata power line (2 connections per line). 

 

Does that make sense?