Reddit mentions of Cable Matters 2-Pack 15 Pin SATA to 4 SATA Power Splitter Cable - 18 Inches

These work great

Cable Matters 2 Pack 15 Pin SATA to 4 SATA Power Splitter Cable - 18 Inches https://www.amazon.com/dp/B012BPLW08/ref=cm_sw_r_cp_apa_1r6PBbHJS8FF0

I’ll try to break down a parts list since OP didn’t explicitly say one and I am looking into this project myself:

• 12v to 5v DC Converter. This is powering the Rock64 (pi) in this scenario.
  
• some sort of 12v power supply
  
• SATA power connector - select one for your use case.
  
• Thanks to another user, it looks like the power supply and the SATA adapter both come from this unit’s internals: Unitek USB 3.0 to SATA I/II/III Mini Dual Bay External Hard Drive Docking Station
  
• Sata cables of appropriate length

I use these spliters for more SATA power connectors and These hotswap cages for housing the drives. They are often on sale at newegg for $40-60, this card Flashed to IT mode will add another 8 sata connections via two sas connectors(sff-8087) via a breakout cable

Currently I am running 8x3tb drives in my pc with a gtx 970 and my 550watt PSU handles it just fine.

You can definitely stick with the Fractal series. I did because I couldn't have a loud, unsightly machine setup anywhere in my home. I have my main system w/ 10 Drives + 2 SSDs + 3 NVME drives in an R6. That has a DAS connected with 19 drives inside an R5; 8 stock bays + 3 in 2x5.25 bay adapter + extra 3 drive cage + extra 5 drive cage.

As you are in Europe, you might not even have to pay crazy shipping charges to buy spare drive cages from https://www.fractal-design-shop.de/Define-R5_1. In the US I had to source the extra drive cages from r/hardwareswap but that proved to be easier than I expected. Here is a pic I took before I added the 2nd 5-bay drive cage: https://imgur.com/a/TWL8IB1

Edit: Request for more info...

I have not done a build log as I am not yet "finished" with the build, but it looks like there is sufficient demand for parts info so here it goes:

I have an R6 for my main NAS server loaded with the motherboard, 10 3.5 drives and one SSD. The R5 has two extra drive cages (3 + 5) as well a 2x5.25-to-3x3.5 bay adapter.

The expansion cards I use are:

• 1x LSI 9210-8i with SAS to SATA cables for 8 of the 10 internal drives in the R6. The other 2 + SSD use SATA ports on the motherboard.
  
  
• 1x LSI-9207-8e connected via 8088 cables to two HP SAS expanders powered in the R6 by riser cards which connect to the drives with the same SAS to SATA cables as above.
  
  Additional parts I used:
  
  
• An SFX PSU is important so you can fix the extra drive cages. Don't skimp on this one. You don't need a ton of Watts (I'm using a 600W Gold) but you need quality, you are hooking up thousands of dollars of drives to it!
  
  
• Power splitters: One & Two
  
  
• Power switch to turn on the DAS PSU and reset it any time you need to take the NAS offline (DAS always must be powered on first)
  
• Fan controller for powering fans in the DAS
  
  More inspiration can be found here: https://www.serverbuilds.net/16-bay-das

yup.. put hdd cages instead of gpus. = NAS here is what you need for power to drives.. these are the tooless style sata power connections, meaning you dont need an expensive molex crimper.. you can pull them off and reposition to your liking. https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/ or https://www.amazon.com/LINESO-4xSATA-Female-Splitter-19-5Inches/dp/B074DSHKYR/

Not all molded, but the majority of the adapters catching fire were molded.
Not sure on those particular adapters, but I do have some Startech 2xSATA to 1x6-pin Y adapters, that happen to be molded, in a mining rig that have been fine.
https://www.amazon.com/gp/product/B007Y91B80/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
It's possible I just got lucky.
I'm sure there are y-cables that are crimped, just possibly hard to find. Cable Matters does make a 1 to 4.
https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08

I bought these, https://www.amazon.com/gp/product/B012BPLW08/

I have a server motherboard with SAS -> SATA ports so I can plug in one of these and get 4x SATA ports from one port. For power, I use these power splitters that allow me to neatly add power to a column of HDDs. I run one of the splitters per power line from the PSU. Before I had a server motherboard, I used this PCIE SATA card.

I have been using these https://www.amazon.com/gp/product/B012BPLW08 for about 2 years now. I'm running 14 drives.

Thanks OP, I was recently looking for something like this.

Also if someone has an european alternative to these, price and quality wise, please let me know.

There are sata power cables that have piggybacks like this. https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/ref=mp_s_a_1_7?keywords=4+drive+sata+cable&qid=1574983691&sr=8-7

Just split the power cables.
https://www.amazon.com/Cable-Matters-Power-Y-Splitter-Inches/dp/B00V6QA65G/ref=pd_sbs_147_1?_encoding=UTF8&pd_rd_i=B00V6QA65G&pd_rd_r=57D5K6S696NX8MJVE2DT&pd_rd_w=uVS9J&pd_rd_wg=Eo6p9&psc=1&refRID=57D5K6S696NX8MJVE2DT
https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/ref=pd_sim_147_4?_encoding=UTF8&pd_rd_i=B012BPLW08&pd_rd_r=RT1VTG4Z0MXJRQ5QRMZF&pd_rd_w=N9nEt&pd_rd_wg=FE4mR&psc=1&refRID=RT1VTG4Z0MXJRQ5QRMZF

That’s why you get these and cut these

Cable Matters 2-Pack 15 Pin SATA to 4 SATA Power Splitter Cable - 18 Inches

Leave the PSU oem cables alone.

I’m so sorry, I need to learn to check Reddit more. I don’t think cable management is all that bad, considering there is room in front of the PSU to mash all the cables in. HOWEVER, I would recommend getting two SATA power extensions with a bunch of connectors closer together.
This is what I’m using. I’ll see if I can get a picture copied from my Facebook album to IMGUR.

I think my Corsair ML120 fans are louder than the drives.

crap, most sata splitters look pretty similar to this.

what about this one, do you think this one's moulded? https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/ref=sr_1_3?s=electronics&ie=UTF8&qid=1537797505&sr=1-3&keywords=sata+power+splitter&dpID=41fkXTYpqoL&preST=_SY300_QL70_&dpSrc=srch

thanks dude

Cable Matters (2 Pack) 15 Pin SATA to 4 SATA Power Splitter Cable - 18 Inches https://www.amazon.com/dp/B012BPLW08/ref=cm_sw_r_cp_apa_3S.EzbAD4JCW8

Hmm, I use something like this on a Corsair 750D but the cables on mine have smaller spaces than the product page on Amazon so they're a better fit for drive caddies. (the one I used I got from a local computer store)


Could you use this which comes in a 2 pack: https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/

Ah I'm sorry, you're right. I misread the product pages. You might be able to use a SATA power splitter, but it seems 8-pin → SATA power cables do not exist. Probably safe to assume that past that, you know just as much or more than me.