Question about riser power cables | Bitcointalksearch.org

JayDDee

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Quote from: philipma1957 on March 31, 2021, 08:35:32 AM

Another point on the low power handling sata connections is are you running a beast of a gpu lets say a nvidia 3090 vs a low powered card lets say an amd 5500xt

I would never try to run a nvidia 3090 or a nvidia 3080 on a riser using a sata connection. Those cards can pull over 300 watts between the riser and the pcie connections.

However If I was pushed I would try to run an amd 5500xt as those card pull 55watts and if they go runaway they go up to 95 watts between the riser and the pcie connection.

I also count the power connections to estimate how much power to expect from the riser.

The supply is 75W for the slot/riser, 75W for a 6 pin connection an 150W for 8 pin.
Assuming even distribution I can calculate how much of the load comes from the riser
vs the 6 or 8 pin connections.

Example:

1080ti: 250W rating with 6 + 8 pin connectors.
Total supply is 75+ 75+150 = 300W.
250/300 = 62 / 75

1070: 150W rating with 8 + 8 pin connectors.
Total supply is 75+150+150 = 375W.
150/375 = 30 / 75

The 1070 can be expected to draw around 30W from the riser while the 1080ti around 62W.
Of course ASSUMING even distribution.

FP91G

legendary

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Quote from: TheMimic1 on March 31, 2021, 01:53:31 PM

Definitely going to burn the sata cables, they aren't so strong even if you hold and squeeze them in your hand, the highest gpu I run through sata cable are gtx1660s and TI, they consume less, what I don't get is why those sata cables comes with risers in the first place when they know it can't handle high watt draws

3 years ago there was not a large selection of raisers, so many miners used a sat raiser for the GTX 1070, RX 470,RX 480.
The maximum consumption of these video cards is 130-140 watts.
The new PSUs had more sat connectors and fewer molex connectors, so different raisers had to be used on the farm.
Experience has shown that sat raisers can work for years on video cards with a consumption of up to 130 watts.

TheMimic1

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Quote from: philipma1957 on March 31, 2021, 08:35:32 AM

Another point on the low power handling sata connections is are you running a beast of a gpu lets say a nvidia 3090 vs a low powered card lets say an amd 5500xt

I would never try to run a nvidia 3090 or a nvidia 3080 on a riser using a sata connection. Those cards can pull over 300 watts between the riser and the pcie connections.

However If I was pushed I would try to run an amd 5500xt as those card pull 55watts and if they go runaway they go up to 95 watts between the riser and the pcie connection.

look below at these amd 5500xt I would feel safe running these with sata

this rig with the 3080 would scare me to run a sata hook up
as the 3080 pulls a lot of power. way way way more than the 5500xt

Definitely going to burn the sata cables, they aren't so strong even if you hold and squeeze them in your hand, the highest gpu I run through sata cable are gtx1660s and TI, they consume less, what I don't get is why those sata cables comes with risers in the first place when they know it can't handle high watt draws

FP91G

legendary

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My GTX 1080 video cards consume about 170 watts and they are connected to the motherboard via molex raisers.
This video card has been working for several years. If you connect video cards with high power consumption, then you should use a 6 pin raiser.
Expensive power supplies use thicker wires, so the characteristics are better than these
https://www.gpuminingresources.com/p/psu-cables.html
But do not hope for this, it is better not to exceed these values.

philipma1957

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'The right to privacy matters'

Another point on the low power handling sata connections is are you running a beast of a gpu lets say a nvidia 3090 vs a low powered card lets say an amd 5500xt

I would never try to run a nvidia 3090 or a nvidia 3080 on a riser using a sata connection. Those cards can pull over 300 watts between the riser and the pcie connections.

However If I was pushed I would try to run an amd 5500xt as those card pull 55watts and if they go runaway they go up to 95 watts between the riser and the pcie connection.

look below at these amd 5500xt I would feel safe running these with sata

this rig with the 3080 would scare me to run a sata hook up
as the 3080 pulls a lot of power. way way way more than the 5500xt

miner29

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Quote from: canozturk21 on March 31, 2021, 01:15:01 AM

Quote from: ?? on ??

Try as much as possible to avoid any s-ata adapter or even molex adapter connection for powering up risers! Sooner or later, it will get melted.
S-ata powers are good until around 25watts consumption (for biggest hard disk), but PCI-e adapter can consume more than 80 watts when delivering 75 watts to graphic card.
The best riser power supply connection, is directly PCI-E 6 pin connector plugged into it.

Hi,

Is it safe to use 6 pin 3x splitter ? I'd like to buy custom made 6 pin splitter 1 x 3 for risers.

No that would be over the wattage limit of a 6 pin....

see here and dont cheat on wattage or expect melted wires and burned mess.....

https://www.gpuminingresources.com/p/psu-cables.html

canozturk21

newbie

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Quote from: ?? on ??

Try as much as possible to avoid any s-ata adapter or even molex adapter connection for powering up risers! Sooner or later, it will get melted.
S-ata powers are good until around 25watts consumption (for biggest hard disk), but PCI-e adapter can consume more than 80 watts when delivering 75 watts to graphic card.
The best riser power supply connection, is directly PCI-E 6 pin connector plugged into it.

Hi,

Is it safe to use 6 pin 3x splitter ? I'd like to buy custom made 6 pin splitter 1 x 3 for risers.

dan_729

newbie

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I got these risers that provides a 6 Pin to SATA adapter cable for power. I've been using the risers with the provided cables for over a month now without any perceivable issues (no overheating, etc). I am powering 2 risers per PSU SATA since I don't have enough ports to power 1 riser per SATA.

The thing that got me worried is that recently I've been reading a lot of comments saying that 6 Pin to SATA are bad, like really bad. Most people were recommending 6 Pin to 6 Pin power adapters for my riser, so I searched for 6 Pin to dual 6 Pin on the retailers available to me but didn't find any, only 6 Pin to dual 6+2 Pin which are marketed to power GPUs. Is it a good idea to power risers with those cables (since the 2 pin from 6+2 pin would be left hanging)? Would it be any safer compared to my current configuration?

Topic: Question about riser power cables (Read 127 times)