Powering woes with risers | Bitcointalksearch.org

twicx

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Quote from: CryptoWatcher420 on October 11, 2017, 06:06:17 PM

Quote from: twicx on October 11, 2017, 11:13:18 AM

That's actually helpful. Thank you for that on the SATA front.

And judging by what people have gotten to with aggressive undervolting, people are recording sub-100W per card on RX580s. Even if it's the case that one 1000W psu does 5 and the other does the other 5, I think I'll be ok.

that's only if you mod the bios, software doesn't do it quite the same, things like wattman and other OC software always has to reapply settings, and going with a modded implies you know what your doing otherwise if you don't have the right tools to say restore a bios on a dead gpu, your screwed. amd gpus most manufacters do not accept a gpu with a modded bios and it voids the warrenty as well at which point you are shit out of a gpu cant rma a gpu without the original bios on it man. lots of things that miners aren't telling you or you are not thinking of.

I would feel quite confident/comfortable modding the bios. There's certainly a lot of very straightforward guides to doing it.

As for a bricked GPU, there's also a few guides for unbricking them that, having looked at them, also seem to be within my capabilities.

What I'm now wondering is the whole thing that "GPUs sometimes revert to their original voltages". Is this literally totally random? Surely something has to trigger it?

philipma1957

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'The right to privacy matters'

Quote from: twicx on October 11, 2017, 06:01:57 PM

Ok, update after checking what cables I have. My PSU came with a bunch of cables, and after connecting everything else up, like fans, mobo etc., here's what I have:
2 x 4-head SATA power cable
1 x 4-molex+1 SATA

Ideally, putting 3 risers on each of those SATA cables would be what I'd like. The cables I have for SATA to 6-pin riser aren't the ones with just 2 or 3 wires between the two ends, its more like 6, although I didn't count.

So, using the 2 x 4-head SATA cables with 3 risers on each with aggressive undervolting. Ok or not ok?

no not okay.

undervolting occasionally says fuck you and drops back to stock volts. when and if that happens you will melt out.

CryptoWatcher420

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Small Time Miner, Rig Builder, Crypto Trader

Quote from: twicx on October 11, 2017, 11:13:18 AM

That's actually helpful. Thank you for that on the SATA front.

And judging by what people have gotten to with aggressive undervolting, people are recording sub-100W per card on RX580s. Even if it's the case that one 1000W psu does 5 and the other does the other 5, I think I'll be ok.

that's only if you mod the bios, software doesn't do it quite the same, things like wattman and other OC software always has to reapply settings, and going with a modded implies you know what your doing otherwise if you don't have the right tools to say restore a bios on a dead gpu, your screwed. amd gpus most manufacters do not accept a gpu with a modded bios and it voids the warrenty as well at which point you are shit out of a gpu cant rma a gpu without the original bios on it man. lots of things that miners aren't telling you or you are not thinking of.

twicx

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Activity: 88

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Ok, update after checking what cables I have. My PSU came with a bunch of cables, and after connecting everything else up, like fans, mobo etc., here's what I have:
2 x 4-head SATA power cable
1 x 4-molex+1 SATA

Ideally, putting 3 risers on each of those SATA cables would be what I'd like. The cables I have for SATA to 6-pin riser aren't the ones with just 2 or 3 wires between the two ends, its more like 6, although I didn't count.

So, using the 2 x 4-head SATA cables with 3 risers on each with aggressive undervolting. Ok or not ok?

twicx

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Activity: 88

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Agreed. I've also noticed that a number of those overheating sata connection stories seem to come from the old 4-pin based risers. Mine is one of the newer 6-pin ones with the additional caps etc.

Another query I have is if undervolting also aids in keeping things cool. I've seen some impressive undervolting, with some people reporting sub 100w per card. But, does this also lower the power draw to the risers or is it just from the PSU to the main power supply connection for the card?

huntingthesnark

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Maybe irrelevant, but I've got several 1300 EVGA Psus, which come with 4 molex on one sata. Never have an issue using 4. Alternative is using some random sata-molex converter off Amazon - which do you trust?

dragonmike

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Quote from: twicx on October 11, 2017, 04:00:06 PM

Quote from: dragonmike on October 11, 2017, 03:56:56 PM

Quote from: twicx on October 11, 2017, 12:49:11 PM

What about something like this?
https://www.moddiy.com/products/Thermaltake-Smart-SE-Single-Sleeved-6%252dPin-to-2x-SATA-Modular-Cable.html

3 of those, one in each of the modular slots on the PSU?

As I wrote just earlier in another thread, try to buy the cables from the same brand as your PSU.
Different brands fuck around with their plugs/socket designs so if you use another brand they will not match the correct inputs/outputs and you'll at best have no power, and at worst potentially risk frying stuff.

Also, as already said above, SATA cables are absolutely fine as long as you don't put more than 2 risers per SATA cable.

I have a feeling my PSU came with 3 additional 4-headed SATA cables for the other 6-pin sockets. However, I can't quite remember what way they're divided up. If they're 4-headed cables, and I only use 2 per riser, does it make a difference which ones in the "chain" I use? If there's 4 sata heads and i use numbers 1 and 3, does that make any difference?

Not at all, that's perfectly fine.
Just make sure your ambient temp isn't massively high. 2 risers per sata cable is above SATA spec. Many still consider it okay, but keep an eye on them if temps get high in the summer (or if you have poor ventilation).

twicx

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Quote from: dragonmike on October 11, 2017, 03:56:56 PM

Quote from: twicx on October 11, 2017, 12:49:11 PM

What about something like this?
https://www.moddiy.com/products/Thermaltake-Smart-SE-Single-Sleeved-6%252dPin-to-2x-SATA-Modular-Cable.html

3 of those, one in each of the modular slots on the PSU?

As I wrote just earlier in another thread, try to buy the cables from the same brand as your PSU.
Different brands fuck around with their plugs/socket designs so if you use another brand they will not match the correct inputs/outputs and you'll at best have no power, and at worst potentially risk frying stuff.

Also, as already said above, SATA cables are absolutely fine as long as you don't put more than 2 risers per SATA cable.

I have a feeling my PSU came with 3 additional 4-headed SATA cables for the other 6-pin sockets. However, I can't quite remember what way they're divided up. If they're 4-headed cables, and I only use 2 per riser, does it make a difference which ones in the "chain" I use? If there's 4 sata heads and i use numbers 1 and 3, does that make any difference?

dragonmike

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Quote from: twicx on October 11, 2017, 12:49:11 PM

What about something like this?
https://www.moddiy.com/products/Thermaltake-Smart-SE-Single-Sleeved-6%252dPin-to-2x-SATA-Modular-Cable.html

3 of those, one in each of the modular slots on the PSU?

As I wrote just earlier in another thread, try to buy the cables from the same brand as your PSU.
Different brands fuck around with their plugs/socket designs so if you use another brand they will not match the correct inputs/outputs and you'll at best have no power, and at worst potentially risk frying stuff.

Also, as already said above, SATA cables are absolutely fine as long as you don't put more than 2 risers per SATA cable.

blacktux88

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we have got riser which have burned the cable to the power supply.
We carefully and split the powercable good enough !

thanks

twicx

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Yeah it may come to that, although it looks like if i use 3 cables powering 2 risers each with SATA, like the Thermaltake cable above, I might be ok.

adaseb

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All you need is +12V, GND and +5V to power the risers. With that PSU you will need to make custom cables to get it working.

Buy some pins, wires, and a crimp tool and do a custom job yourself.

twicx

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Activity: 88

Merit: 10

What about something like this?
https://www.moddiy.com/products/Thermaltake-Smart-SE-Single-Sleeved-6%252dPin-to-2x-SATA-Modular-Cable.html

3 of those, one in each of the modular slots on the PSU?

twicx

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Activity: 88

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Will do.

I've been reading alot about what my other options are, because simply put, if this is going to be running 24/7, I'd rather not have to worry about things melting.

The difficulty is the risers having a 6-pin female socket on them. Ideally, going 6-pin to 6-pin seems to be great, and I would wonder if I could use one of the 6-pin Y-splitters to power 2 x risers from 1 x 6-pin slot on the PSU. The challenge with this is finding a 6-pin male to 6-pin male cable.

Ryuh

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Quote from: twicx on October 11, 2017, 11:13:18 AM

That's actually helpful. Thank you for that on the SATA front.

And judging by what people have gotten to with aggressive undervolting, people are recording sub-100W per card on RX580s. Even if it's the case that one 1000W psu does 5 and the other does the other 5, I think I'll be ok.

You are welcome, its not just me, most of the people use 2 (sata or molex) raisers per cable rule and do not have any problems.
You can sense there is problem when you touch the cable - if its really hot near burning there is a problem, if its cold or a little warm you are fine.

For your setup i wish you good luck, just be careful and keep an eye on it.

twicx

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Activity: 88

Merit: 10

That's actually helpful. Thank you for that on the SATA front.

And judging by what people have gotten to with aggressive undervolting, people are recording sub-100W per card on RX580s. Even if it's the case that one 1000W psu does 5 and the other does the other 5, I think I'll be ok.

Ryuh

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Activity: 282

Merit: 100

2 for 10 cards is not the same as 1 for 6 cards, but do whatever you want.
I just want to warn you that using low quality 1000w PSU to do a 1300w job is not a good idea.

On your question, i have my setups with 6 pin to sata raisers and put them maximum 2 per cable.
So far i dont have any problems with that. You can use the other 3 6 pin connectors for that.

twicx

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I've 2 of them for 10 cards.

And your reply doesn't help.

To refer to my original post, I need help powering the risers.

Ryuh

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Why did you decide this PSU is a good idea? It have 1000W 80+ bronze certification and not a popular brand. So maybe its 80+ bronze, but you cant be sure.
RX 580 per specification have 185w TDP and you have 6 of them = 1110w!!! Thats just the cards! You have MOBO+CPU+RISERS to power with that PSU.
Bad things will bound to happen if you use it for that setup.
You need better PSU for sure, dont even try it!
1300w is the minimum you need and quality brand like EVGA or Corsair. To be on the save side you need 1500w+.

twicx

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I'm having some great difficulty figuring out how to power everything in my new rig. Here's where I'm at, any help is greatly appreciated:

The PSU I'm using is a Rosewill Hive 1000W (https://www.newegg.ca/Product/Product.aspx?Item=N82E16817182315). It has 6 x 6+2Pin, which are connected into 6 x RX580.
There's then 4 x 6 pin slots, which I'm aiming to use to power the risers. One of those slots is currently used up for fans, mobo etc.

The problem lies with the risers.

The risers I have require a 6-pin power connection, and they came with 6-pin to SATA cables, which I understand is a pretty bad idea. Looking for suitable alternatives is proving to be pretty confusing. I've read some articles recommending molex, but finding suitable cables on places like newegg or amazon is proving to be very difficult.
From what I can tell, I need some sort of way of going 6-pin to molex then back to 6 pin!?

I also happen to conveniently have 6-pin y-cables, but then I'm left with 3 x female 6-pins, and I can't seem to figure out a cable to then go from there to the PSU (it's a female end on both the splitters and the PSU).

Any help is greatly appreciated.

Topic: Powering woes with risers (Read 402 times)