Some riser advice please | Bitcointalksearch.org

Vaccinus

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Quote from: poby on June 20, 2017, 10:03:52 AM

Not to mention, sata connectors are only rated to handle 4.5 amps which equates to 54 watts. If you trying to power a 1080ti with a sata connector to the riser you are taking a much greater risk than if you used molex or 6 pin.

yeah better to use molex, but remember that a 1080ti take its wattage from the 2x8 pin, so at best it can take 75watt if you overclock heavy, from your risers, i still prefer normal riser and let the MB doing the rest of the work

EvilMonkey

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Quote from: PengiPower on June 21, 2017, 01:03:05 AM

Quote from: poby on June 21, 2017, 12:41:27 AM

It does seem like you have no choice but to use the sata. In this case I would suggest get a 2 x sata to 1 6pin adaptor. That should in theory operate within spec. I still wouldn't use a single sata to a single 6pin.

Or else get a bigger power supply e.g. AX1500i

This is probably the best solution for me. Thanks
PSU makers should get on the crypto train like Mobo makers and GPU makers with special power supplies with extra PCIE rails! Most of these PSUs were designed for at most Quad SLI/Crossfire Sad

To be honest you really are pushing it for a single rig. That is a lot of density and if you want to push it that far then you have to come up with the solutions yourself. 3-4 is enough per rig. Esp when 1080 ti's is the way to go now.

Most decent PSU's even with 1000w have enough connectors at the PSU end. They just may not come with enough cables. Just depends what you buy. Thats when you need to supply the extra cables yourself.

PengiPower

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Quote from: poby on June 21, 2017, 12:41:27 AM

It does seem like you have no choice but to use the sata. In this case I would suggest get a 2 x sata to 1 6pin adaptor. That should in theory operate within spec. I still wouldn't use a single sata to a single 6pin.

Or else get a bigger power supply e.g. AX1500i

This is probably the best solution for me. Thanks
PSU makers should get on the crypto train like Mobo makers and GPU makers with special power supplies with extra PCIE rails! Most of these PSUs were designed for at most Quad SLI/Crossfire Sad

poby

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It does seem like you have no choice but to use the sata. In this case I would suggest get a 2 x sata to 1 6pin adaptor. That should in theory operate within spec. I still wouldn't use a single sata to a single 6pin.

Or else get a bigger power supply e.g. AX1500i

PengiPower

newbie

Activity: 5

Merit: 0

Quote from: EvilMonkey on June 20, 2017, 10:44:41 PM

PCIE molex connectors?

That would be pretty rare for you PSU to not have enough connectors. You can use the adaptors that are 6pin molex to the riser card and 4 pin to the PSU sorry not sure what they are called. The old power connector for HDD's and CDroms.

Or there is options with splitters as well. You could buy a cable that would go into your PSU and split into two to power the risers from what I was reading in this thread? As I assume if you have run out then you are using a cable directly from the PSU to the Riser already.

Or if your PSU has more slots for power cables (modular PSU) you can purchase more cables for it.

Thanks for the advice, but I'm still not sure what to do since my PSU will not have enough connectors to avoid me using SATA.

For context, I am using 6 1070s that require a 8pin + 6 pin connector and 6 PCI risers (6 pin PCIE version)

My PSU is 1200w (http://www.thermaltake.com.au/products-model.aspx?id=C_00002351) and has 8 PCIE, 8 MOLEX and 12 SATA connectors.

This means I need 12 PCI connectors for the GPU and 6 more for the risers. At this point, I'm planning to power the GPUs with the PCI-E connectors and the 8 MOLEX with 2-Molex to 1 6-pin adapters. This means I require the SATA connectors to power the risers.

Another alternative is that I use 8-pin to 2 6-pin splitters, which means I can power 2-4 of the risers with MOLEX.

Will how much power is supplied to the risers matter given the 1070s are already powered by a 6-pin and 8-pin?

poby

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Splitting a molex connector into no more than 2 is safer than using any sata. The cable before the split might get a little warm but not enough to be dangerous and most importantly, you won't be exceeding the current rating spec anywhere. The best connector is the 6 pin as it uses 3 wires for the 12 volt rail. The next best is the molex which while only using one pin, at least it's a big pin with a larger surface contact area. The sata should only be used if the cards are low powered and unlikely to draw more than 4.5 amps from the riser. Definitely not if it's anything like a 1080ti.

EvilMonkey

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Quote from: PengiPower on June 20, 2017, 09:46:09 PM

Sorry, jacking this thread a bit, but I think its relevant

What should you do if your power supply has more than enough output, but not enough PCIE+MOLEX connectors to power all your cards and risers without SATA? (Using 8pin - 2x 6 pin splitters wont be enough)

2nd PSU?

PCIE molex connectors?

That would be pretty rare for you PSU to not have enough connectors. You can use the adaptors that are 6pin molex to the riser card and 4 pin to the PSU sorry not sure what they are called. The old power connector for HDD's and CDroms.

Or there is options with splitters as well. You could buy a cable that would go into your PSU and split into two to power the risers from what I was reading in this thread? As I assume if you have run out then you are using a cable directly from the PSU to the Riser already.

Or if your PSU has more slots for power cables (modular PSU) you can purchase more cables for it.

PengiPower

newbie

Activity: 5

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Sorry, jacking this thread a bit, but I think its relevant

What should you do if your power supply has more than enough output, but not enough PCIE+MOLEX connectors to power all your cards and risers without SATA? (Using 8pin - 2x 6 pin splitters wont be enough)

2nd PSU?

poby

full member

Activity: 258

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Quote from: EvilMonkey on June 20, 2017, 07:55:25 PM

Quote from: EvilMonkey on June 20, 2017, 04:16:36 PM

Thanks guys appreciate the fast replies.

So the point of the adapter that comes with it is if you don't have enough extra 6pin connectors on your PSU?

The one I linked connects to the riser with a molex 6 pin and the other end that connects to the PSU is Sata. Does it matter what the end that connects to the PSU is? Will the one linked provide the most power compared to other conenctors?

Is it only the Riser end as Sata which is not as good?

It looks like sata is bad all round so don't get sata if it is the connector on the riser or the connector on the PSU end?

Avoid sata in the connector or on the riser if you possibly can. It's so tempting to use cos most power supplies have heaps of them and not enough molex or 6 pin. If it's not a very high powered card, it's not so important but definitely don't use any sata if you running something like a 1080ti!

EvilMonkey

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Quote from: EvilMonkey on June 20, 2017, 04:16:36 PM

Thanks guys appreciate the fast replies.

So the point of the adapter that comes with it is if you don't have enough extra 6pin connectors on your PSU?

The one I linked connects to the riser with a molex 6 pin and the other end that connects to the PSU is Sata. Does it matter what the end that connects to the PSU is? Will the one linked provide the most power compared to other conenctors?

Is it only the Riser end as Sata which is not as good?

It looks like sata is bad all round so don't get sata if it is the connector on the riser or the connector on the PSU end?

EvilMonkey

full member

Activity: 192

Merit: 100

Quote from: SDRebel on June 20, 2017, 07:38:53 PM

Quote from: EvilMonkey on June 20, 2017, 06:54:24 PM

Quote from: SDRebel on June 20, 2017, 06:30:06 PM

i won't threadjack (much), but I'll join since I was also thinking about risers to go from 2 to 4...
all the power still goes from PSU to card and the riser is only power for data transmission? no?

you are asking similar questions to me so all good.

this one seems to be very good and simple info
http://www.gobitgo.com/articles/1001/How-To-Correctly-Use-and-Install-PCI-E-Riser-Cables/

It didn't really provide anything and the photo links are dead. Though it is interesting to know about the jumper thanks.

SDRebel

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Activity: 569

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Quote from: EvilMonkey on June 20, 2017, 06:54:24 PM

Quote from: SDRebel on June 20, 2017, 06:30:06 PM

i won't threadjack (much), but I'll join since I was also thinking about risers to go from 2 to 4...
all the power still goes from PSU to card and the riser is only power for data transmission? no?

you are asking similar questions to me so all good.

this one seems to be very good and simple info
http://www.gobitgo.com/articles/1001/How-To-Correctly-Use-and-Install-PCI-E-Riser-Cables/

EvilMonkey

full member

Activity: 192

Merit: 100

Quote from: VyprBTC on June 20, 2017, 07:00:50 PM

Quote from: EvilMonkey on June 20, 2017, 06:26:28 PM

Quote from: VyprBTC on June 20, 2017, 05:22:54 PM

Anyone know where I can get those for cheaper?

I was invoiced directly and invoice was $1 per piece that seller was getting them at - but I couldn't source the company. I need about 200 of them but wouldn't mind buying a few thousand to have on hand.

None of the guys from alibaba have replied to us either which is weird since their price is even triple or more what I saw the invoice was for.

Nice thread hijack Tongue

.

What are you doing with so many risers? are you onselling? I was thinking about doing that myself as they are impossible to get in my country.

Threadjack? nooo way - i was asking for you, because I new that you were thinking about doing it yourself because they're impossible to get in your country! Tongue

EvilMonkey - let's get us some risers now shall we

Haha thanks. I have ordered some, I only ordered 5 and they were all around 5-6 US. I only need one right now so I will try sell some and see if they sell before I bulk buy Cheesy

.

VyprBTC

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Activity: 350

Merit: 100

Quote from: EvilMonkey on June 20, 2017, 06:26:28 PM

Quote from: VyprBTC on June 20, 2017, 05:22:54 PM

Anyone know where I can get those for cheaper?

I was invoiced directly and invoice was $1 per piece that seller was getting them at - but I couldn't source the company. I need about 200 of them but wouldn't mind buying a few thousand to have on hand.

None of the guys from alibaba have replied to us either which is weird since their price is even triple or more what I saw the invoice was for.

Nice thread hijack Tongue

.

What are you doing with so many risers? are you onselling? I was thinking about doing that myself as they are impossible to get in my country.

Threadjack? nooo way - i was asking for you, because I new that you were thinking about doing it yourself because they're impossible to get in your country! Tongue

EvilMonkey - let's get us some risers now shall we

EvilMonkey

full member

Activity: 192

Merit: 100

Quote from: SDRebel on June 20, 2017, 06:30:06 PM

i won't threadjack (much), but I'll join since I was also thinking about risers to go from 2 to 4...
all the power still goes from PSU to card and the riser is only power for data transmission? no?

you are asking similar questions to me so all good.

SDRebel

hero member

Activity: 569

Merit: 507

i won't threadjack (much), but I'll join since I was also thinking about risers to go from 2 to 4...
all the power still goes from PSU to card and the riser is only power for data transmission? no?

EvilMonkey

full member

Activity: 192

Merit: 100

Quote from: VyprBTC on June 20, 2017, 05:22:54 PM

Anyone know where I can get those for cheaper?

I was invoiced directly and invoice was $1 per piece that seller was getting them at - but I couldn't source the company. I need about 200 of them but wouldn't mind buying a few thousand to have on hand.

None of the guys from alibaba have replied to us either which is weird since their price is even triple or more what I saw the invoice was for.

Nice thread hijack Tongue

.

What are you doing with so many risers? are you onselling? I was thinking about doing that myself as they are impossible to get in my country.

toptek

legendary

Activity: 1274

Merit: 1000

This another good place

http://www.parallelminer.com/

if you use those raises i woulds use these to

http://www.ebay.com/itm/18AWG-6-pin-to-2x-6-2-pin-6-pin-8-pin-Power-Splitter-Cable-PCIE-PCI-Express/361651807884?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Make sure the wire is at least 18 AWG , 16 AWG is better and any thing over 18 AWG and up, is bad to use .... for mining this way .......

VyprBTC

full member

Activity: 350

Merit: 100

Quote from: CarlOrff on June 20, 2017, 05:37:01 PM

Quote from: VyprBTC on June 20, 2017, 05:22:54 PM

Anyone know where I can get those for cheaper?

I was invoiced directly and invoice was $1 per piece that seller was getting them at - but I couldn't source the company. I need about 200 of them but wouldn't mind buying a few thousand to have on hand.

None of the guys from alibaba have replied to us either which is weird since their price is even triple or more what I saw the invoice was for.

eBay is the good shop for that.

I can't find quantity 2,000 for $1 each on ebay. Cheapest on ebay is like $5.50

Alibaba is like $3.

CarlOrff

sr. member

Activity: 826

Merit: 440

Quote from: VyprBTC on June 20, 2017, 05:22:54 PM

Anyone know where I can get those for cheaper?

I was invoiced directly and invoice was $1 per piece that seller was getting them at - but I couldn't source the company. I need about 200 of them but wouldn't mind buying a few thousand to have on hand.

None of the guys from alibaba have replied to us either which is weird since their price is even triple or more what I saw the invoice was for.

eBay is the good shop for that.

Topic: Some riser advice please (Read 898 times)