Dual Inline vs Single PCI-E Cables

[BleepyEvans]

So I'm a little late to the party but have a few newbish questions I hope someone doesn't mind me answering. I've had a search on the forum and on google but can't seem to find the answer I'm looking for.

I have an Antminer S5, overclocked and draws 660w from the wall. Can I use a two dual PCI-E cable to power both boards? Or is 330W too much to put through a cable with 18AWG wire?

I've seen alot of people using the dual cables, but not sure if they're overclocking, underclocking etc, so thought it safer to ask the question before I have an accident.

The reason I ask is that I've been using my PC's PSU while a CX750M was on order. My computers PSU is semi modular so already had two PCI-E power cables already connected which I plugged into two of the inputs on the S5. I then connected up two extra pci-e power cables for the remaining two inputs on the S5. The PCI-E cables I have are 8 pin at the PSU end, and 6 at the other. The CX750M I have on order only has two 8 pin PCI-E sockets and four 6 pin PCI-E sockets. All my PCI-E cables have 8 pin connectors at one end, so it appears the only option at the moment is to use two dual 6 pin PCI-E cables. Or can I buy some cables to make use of the 6 pin sockets on the PSU?

Thanks in advance (newbie, be nice )

[1715168750]

1715168750

[VirosaGITS]

So I'm a little late to the party but have a few newbish questions I hope someone doesn't mind me answering. I've had a search on the forum and on google but can't seem to find the answer I'm looking for.

I have an Antminer S5, overclocked and draws 660w from the wall. Can I use a two dual PCI-E cable to power both boards? Or is 330W too much to put through a cable with 18AWG wire?

I've seen alot of people using the dual cables, but not sure if they're overclocking, underclocking etc, so thought it safer to ask the question before I have an accident.

The reason I ask is that I've been using my PC's PSU while a CX750M was on order. My computers PSU is semi modular so already had two PCI-E power cables already connected which I plugged into two of the inputs on the S5. I then connected up two extra pci-e power cables for the remaining two inputs on the S5. The PCI-E cables I have are 8 pin at the PSU end, and 6 at the other albeit two pins on the 8 pin connector are empty. The CX750M I have on order only has two 8 pin PCI-E sockets and four 6 pin PCI-E sockets. All my PCI-E cables have 8 pin connectors at one end, so it appears the only option at the moment is to use two dual 6 pin PCI-E cables. Or can I buy some cables to make use of the 6 pin sockets on the PSU?

Thanks in advance (newbie, be nice )

Its really recommended not to do this with 18 AWG, good evga dual connector cables are 16AWG. The safe current for a double cable of good quality, 16AWG is 2x190w i believe, or 380watts.

But anyways, you can try it, plug it in wait a few minutes, the cables should get warm and especially the connectors, that would mean its dangerous to let that run.

And for adding cables to a modular PSU, as long as those sockets are also on the main rail, it will work fine. You can use strait 6 to 6pin custom cables for that too, they're pretty cheap and you can get good ones here on the forum.

[philipma1957]

So I'm a little late to the party but have a few newbish questions I hope someone doesn't mind me answering. I've had a search on the forum and on google but can't seem to find the answer I'm looking for.

I have an Antminer S5, overclocked and draws 660w from the wall. Can I use a two dual PCI-E cable to power both boards? Or is 330W too much to put through a cable with 18AWG wire?

I've seen alot of people using the dual cables, but not sure if they're overclocking, underclocking etc, so thought it safer to ask the question before I have an accident.

The reason I ask is that I've been using my PC's PSU while a CX750M was on order. My computers PSU is semi modular so already had two PCI-E power cables already connected which I plugged into two of the inputs on the S5. I then connected up two extra pci-e power cables for the remaining two inputs on the S5. The PCI-E cables I have are 8 pin at the PSU end, and 6 at the other. The CX750M I have on order only has two 8 pin PCI-E sockets and four 6 pin PCI-E sockets. All my PCI-E cables have 8 pin connectors at one end, so it appears the only option at the moment is to use two dual 6 pin PCI-E cables. Or can I buy some cables to make use of the 6 pin sockets on the PSU?

Thanks in advance (newbie, be nice )

your cx750m is a cosair correct?

it is a bronze and it is not too good.  I would not do what you did for a long list of reasons.

A) it is a bronze it burns a lot of power.
B) the cable issue you picked up on
C) lots of better deals available.

If it is too hard to return the cx750m plug in all four jacks and under clock to freq 275

run for a day check cables every hour or two.

then bump to freq 287.5 run for a day check cables every hour or two.

but like I said if it is easy to return return it as it is a poor choice to mine a s-5 with.

[dogie]

I have an Antminer S5, overclocked and draws 660w from the wall. Can I use a two dual PCI-E cable to power both boards? Or is 330W too much to put through a cable with 18AWG wire?

330W is fine through an 18AWG cable rail. [Official spec would be a minimum of 300W due to 2x 8 pin PCI-E].

The PCI-E cables I have are 8 pin at the PSU end, and 6 at the other. The CX750M I have on order only has two 8 pin PCI-E sockets and four 6 pin PCI-E sockets. All my PCI-E cables have 8 pin connectors at one end, so it appears the only option at the moment is to use two dual 6 pin PCI-E cables. Or can I buy some cables to make use of the 6 pin sockets on the PSU?

You seem to be confusing the PCI-E connectors and the modular connectors. CXMs have a fixed 8 pin connection that fits into the PSU. The CX750M has two such ports and two such cables. On the connector end of these cables are 2x 6 or 8 pin PCI-E connectors. Two of the pins are detachable depending on if you need a 6 or 8 pin connection, but don't worry about that. The 6 pin connections on your PSU are wired up for molex and sata cable rails, ignore them for mining.

There is only one choice of cables and it will fit your requirements fine.

A) it is a bronze it burns a lot of power.

Its actually about 86% efficient.

B) the cable issue you picked up on

There are no cable issues here, he was asking for clarification because the layout is different to his temporary PSU.

C) lots of better deals available.

Americans get spoilt by choice and price, there simply aren't other reasonably priced and non explosive PSUs in that price range in the UK (he is UK). The CX750M is as good as he's going to get.

If it is too hard to return the cx750m plug in all four jacks and under clock to freq 275 run for a day check cables every hour or two. then bump to freq 287.5 run for a day check cables every hour or two.

There is no reason to do this, the S5 is well within specifications for an S5.

but like I said if it is easy to return return it as it is a poor choice to mine a s-5 with.

It is most certainly not.