SATA or 4 PIN MOLEX Directly to Riser Card from PSU

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crypto_newbies_1188

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Dec 16, 2017
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I am new to the mining world. Building my first rig: 8 VEGA 64 Water Cooling GPU’s. I have quite a few items that I have bought but the question is as follows: I have two (2) 1200 Watt Power Supplies, each supply will power 4 cards: 16 pins for the main power input at the top of the VEGA card. My confusion is what to supply the Riser Cards with… (There are 3 different types of riser cards to buy on the market: Sata, 4 Pin Molex, and 6 Pin). My power Supply Unit has two different types of wires to possibly power the riser’s with: Sata and 4 Pin Molex. I have done countless hours of research regarding the adapter wires that come with the Riser Cards (They spontaneously melt and cause fires, I WANT TO AVOID THIS). So I am removing the adapter cable all together and plugging directly into the power supply wires.

Which wire connector from the Power Supply (SATA or Molex) will be better suited to power the Riser Cards? Really need some advice on this guys. (Which one conducts a better more stable current?) OR ANY OTHER ADVICE AS WELL!

Also: for 8 VEGA 64 Water Cooling Cards, are Two (2) 1200 Watt Power Supplies Enough? Should it be 1500 watt supplies?
HELP!!!
 
Solution
A
They melt because fools will connect 3, 4 sometimes even 5 risers on one string of Molex/Sata. Both sata and molex cables can support no more than two risers per string of cable, regardless of how many sata/molex connections are present on said cable. This is a limitation of the wiring inside the cable itself, the PSU does not enforce this limitation in any way. So if the cable is overloaded, the PSU will keep pumping away with power until it melts or catches fire.

That being said, the connection type you choose is up to you, because the sata/molex cable can support the same voltage. Six pin cable supports the most voltage, but it is not ideal to use that... because you need your 6pins for GPUs. Both SATA and Molex are fine to use...
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AnonymousAndy

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Dec 18, 2014
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They melt because fools will connect 3, 4 sometimes even 5 risers on one string of Molex/Sata. Both sata and molex cables can support no more than two risers per string of cable, regardless of how many sata/molex connections are present on said cable. This is a limitation of the wiring inside the cable itself, the PSU does not enforce this limitation in any way. So if the cable is overloaded, the PSU will keep pumping away with power until it melts or catches fire.

That being said, the connection type you choose is up to you, because the sata/molex cable can support the same voltage. Six pin cable supports the most voltage, but it is not ideal to use that... because you need your 6pins for GPUs. Both SATA and Molex are fine to use, you just can't connect more than 2 risers per string of cable.
 
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Solution
Mark RM

Mark RM

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Jul 16, 2014
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Avoid SATA connections, the best cards now use 6 pin PCie connectors for the risers and these can be split with Y's from normal PCIe connections. Directly plugging in molex connectors is OK too, but no more than two risers per cable from from the PSU.

avoid all the adapter cables, avoid SATA and you'll be generally OK.
 
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