SATA to 6-pin PCI-E connector | Bitcointalksearch.org

FP91G

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Quote from: JayDDee on May 14, 2022, 12:08:15 PM

Quote from: philipma1957 on May 14, 2022, 11:37:19 AM

also a molex cable can do 2 risers.

Technically correct but not advised unless YKWYD. But it should never come to that. If you need that many extra
PCIe power connectors you're probably overloading the PSU.

If the power supply is overloaded, it will turn off.
The whole problem is only in cables and connectors, which can start to melt from overheating.

philipma1957

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Quote from: JayDDee on May 14, 2022, 12:08:15 PM

Quote from: philipma1957 on May 14, 2022, 11:37:19 AM

also a molex cable can do 2 risers.

Technically correct but not advised unless YKWYD. But it should never come to that. If you need that many extra
PCIe power connectors you're probably overloading the PSU.

yeah if I have a large atx build I use a 1600 watt evga.

I got some evga titanium for 245 and some gold for 230 which is like half price. I do not have to worry about an over load. as I only push 1100 of the 1600 watts they can do.

JayDDee

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Quote from: philipma1957 on May 14, 2022, 11:37:19 AM

also a molex cable can do 2 risers.

Technically correct but not advised unless YKWYD. But it should never come to that. If you need that many extra
PCIe power connectors you're probably overloading the PSU.

philipma1957

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'The right to privacy matters'

Quote from: FP91G on May 14, 2022, 09:33:31 AM

Quote from: Coinfarm ventures on May 13, 2022, 11:13:58 PM

Quote from: philipma1957 on May 13, 2022, 10:51:02 PM

I have melted sata cables when i did 2 risers more than one time.

My experience with the SATA/Molex PCIe risers is they are actually safer for higher-power video cards like RTX 3080's or RX 6800's. The danger is the low-end GPUs with only a 6-pin power connector. Back in 2017 I attempted to build a Radeon RX 470 rig with Molex PCIe risers. When it started mining ETH, the cables started billowing smoke. I figured out the cards were drawing the full 75W through the PCIe slot. 6A of power was going through a single sucky 20AWG wire. From then on, I only bought risers with a 6-pin power connector. I buy cables with a 18AWG thickness at minimum, with 16AWG preferred.

My Radeon RX 470 - 480 have been running SATA raisers for 6 years now. I do not use adapters with :4 pin - SATA raisers, because they are of poor quality and I connect the raiser directly with a SATA cable from the power supply. The 6 pins of the raiser at that time were not very polar due to problems with the connectors on the PSU.

yeah that can work with a sata cable per riser.

also a molex cable can do 2 risers.

Most people try 2 risers for a sata cable and melting is common.

FP91G

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Quote from: Coinfarm ventures on May 13, 2022, 11:13:58 PM

Quote from: philipma1957 on May 13, 2022, 10:51:02 PM

I have melted sata cables when i did 2 risers more than one time.

My experience with the SATA/Molex PCIe risers is they are actually safer for higher-power video cards like RTX 3080's or RX 6800's. The danger is the low-end GPUs with only a 6-pin power connector. Back in 2017 I attempted to build a Radeon RX 470 rig with Molex PCIe risers. When it started mining ETH, the cables started billowing smoke. I figured out the cards were drawing the full 75W through the PCIe slot. 6A of power was going through a single sucky 20AWG wire. From then on, I only bought risers with a 6-pin power connector. I buy cables with a 18AWG thickness at minimum, with 16AWG preferred.

My Radeon RX 470 - 480 have been running SATA raisers for 6 years now. I do not use adapters with :4 pin - SATA raisers, because they are of poor quality and I connect the raiser directly with a SATA cable from the power supply. The 6 pins of the raiser at that time were not very polar due to problems with the connectors on the PSU.

Z390

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Quote from: JayDDee on May 13, 2022, 11:41:35 PM

Quote from: Coinfarm ventures on May 13, 2022, 11:13:58 PM

My experience with the SATA/Molex PCIe risers is they are actually safer for higher-power video cards like RTX 3080's or RX 6800s. The danger is the low-end GPUs with only a 6-pin power connector.

Wrong. It doesn't matter how much power the card draws, it's how much is drawn from the slot. Every model is different,
size does not matter.

Crazy, I will never power a 6800 gpu using SATA cable, I only use a single SATA to power a small end GPU like 1060 or 1660 super, anything from 2060 I use normal PCIe cable from the power supply.

JayDDee

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Quote from: Coinfarm ventures on May 13, 2022, 11:13:58 PM

My experience with the SATA/Molex PCIe risers is they are actually safer for higher-power video cards like RTX 3080's or RX 6800's. The danger is the low-end GPUs with only a 6-pin power connector.

Wrong. It doesn't matter how much power the card draws, it's how much is drawn from the slot. Every model is different,
size does not matter.

Coinfarm ventures

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Quote from: philipma1957 on May 13, 2022, 10:51:02 PM

I have melted sata cables when i did 2 risers more than one time.

My experience with the SATA/Molex PCIe risers is they are actually safer for higher-power video cards like RTX 3080's or RX 6800's. The danger is the low-end GPUs with only a 6-pin power connector. Back in 2017 I attempted to build a Radeon RX 470 rig with Molex PCIe risers. When it started mining ETH, the cables started billowing smoke. I figured out the cards were drawing the full 75W through the PCIe slot. 6A of power was going through a single sucky 20AWG wire. From then on, I only bought risers with a 6-pin power connector. I buy cables with a 18AWG thickness at minimum, with 16AWG preferred.

philipma1957

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Okay I want to mention why Sata is risky.

many times card clocking fails and card goes to max tdp. more often it happens with windows then linux.

but I have had many cards since 2012 amd and nvidia decide to pull max watts even when they are clocked at lower power draw.

merging the 2 sata from the same cable and only 1 riser works most of the time.

merging the 2 sata from two cables and only one riser works all the time.

I have melted sata cables when i did 2 risers more than one time.

I no longer overload sata cables for my risers.

I rarely use risers but if I do I am very careful.

If I want to power risers I try to use a cpu to pcie splitter.

That handles two risers.

And maybe two molex cables each doing a riser. which gets me to four risers.

some psu’s will allow all molex and I may use two molex from an indentical psu.

so this gets me to six risers and its pretty safe.

but mostly I like all riser free boards.

I got a lot of 1600 watt evgas on sale so they have a lot of wires. I usually have enough to make connections.

FP91G

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8 Pin (6+2) connector is designed for 288 watts. If 2 sat cables allow a load of 54 watts, then this method can be used if your 8 Pin (6 + 2) connector does not consume more than 108 watts. For a video card with a consumption of 120-160 watts, this can be used.
https://www.gpuminingresources.com/p/psu-cables.html

JayDDee

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Quote from: aliitp2 on May 13, 2022, 02:06:10 PM

well how about using two sata connectors on the same strand to connect one of those cables ??... what if that strand is having another connection (maybe molex) that is being used as well ?...

Are you looking for trouble? You seem focussed on trying to find the worst thing to do.

In case it isn't obvious the answer is NO.

aliitp2

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Quote from: philipma1957 on May 12, 2022, 10:40:27 AM

if you take a sata cable with 2 sata jacks and run 1 riser with that adapter it should work. just 1 riser.

if you take two separate sata cables and feed that adapter into 1 riser it would surely work.

well how about using two sata connectors on the same strand to connect one of those cables ??... what if that strand is having another connection (maybe molex) that is being used as well ?...

thanks,

JayDDee

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Yes it's safe as long as they are good quality.

IYKWYD you can safely use a 1 SATA adapter on some cards.

IYKWYD = If You Know What You're Doing. It means you know how to determine how much power a particular card
can draw from the slot and that it's within the SATA connector spec.

Edit: Here's a pretty good description

https://www.nicehash.com/blog/post/why-should-you-not-power-usb-risers-with-sata-power-connectors

The only points I would add is not all versions of the same GPU model use the same power distribution
so don't go by the posted chart. Measure yourself.

Also the number of wires on the cable is a useful clue. Some cheap PSUs use only 6 wires for PCIe cables and 4 for
peripheral cables and should be avoided. PCIe cables should have 8 wires and peripheral cables should have 6.

And always follow up with a touch test to make sure the connector doesn't get too hot.

philipma1957

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if you take a sata cable with 2 sata jacks and run 1 riser with that adapter it should work. just 1 riser.

if you take two separate sata cables and feed that adapter into 1 riser it would surely work.

aliitp2

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sorry for the rather short thread, but is something like this:
https://www.amazon.com.tr/Alfais-Express-Kablosu-%C3%87evirici-D%C3%B6n%C3%BC%C5%9Ft%C3%BCr%C3%BCc%C3%BC/dp/B094FHLLC9/ref=sw_img_crh_rh_qp_4?_encoding=UTF8&pd_rd_i=B094FHLLC9&pd_rd_w=92Khu&pf_rd_p=aefb9f43-a9a0-4e28-8f24-7448a2ed9d33&pf_rd_r=C5GF0PM0TTT2PX7XG1P9&pd_rd_r=6bba556e-aaee-46e8-afa2-9a69ad061603&pd_rd_wg=qcgiO

safe to power the risers only ? considering a riser consumes somewhat around 75w, and EACH sata connector can supply around 50w ?

this could be beneficial since most PSUs lack enough connectors for cards and risers, and those who prefer PSUs over the loud server PSU, can they use cables like that or is it a big no and why ??...

what do you guys think ?

thanks,

Topic: SATA to 6-pin PCI-E connector (Read 142 times)