[Guide] NAS Killer 6.0 - DDR4 is finally cheap

Hi guys!
I ended up buying the supermicro motherboard, and i went with i3 8100t with 32 gb ecc memory. Everything should arrive sometime next week! Pretty excited to put this together and migrate from my current setup!
I will be posting the complete build with prices and pictures when completed.
Thank you again for the guide!

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How many fans do you really need for this setup? Looks like the case itself can support eight plus one on the CPU.

I would recommend 2 intake at the front and 1 exhaust in the back of the case.

Although the Arctic 120 mm fans are often cheapest in 5 packs so if you are getting 5 fans anyway why not 3 in / 2 out. More airflow never hurts and with more fans you could set the fan curve lower and get the same airflow with less noise.

You could potentially even get away with just a CPU fan and no case fans depending on ambient temperature and workload.

Any chance of a Europe version of the guide? It’s super difficult to find the parts listed unfortunately, even from ebay - the prices are just insane and probably better to build something with decent ready available parts.

Goal of the NAS is for it to be multi-purpose - listing some below:
Plex Server → capable of 4k with maybe at most 2 transcode requirements
Storage for files, photos etc
Radarr, Sonarr, Sabnzb
Homeassistant server

Thoughts on the following? Seems kinda pricing and potentially way too much i.e. overkill?

Any advice and recommendations would be much appreciated.

PCPartPicker Part List

Type Item Price
CPU Intel Core i5-12400 2.5 GHz 6-Core Processor €166.89 @ LIFE Informatica
Motherboard ASRock Z690M-ITX/ax Mini ITX LGA1700 Motherboard €222.78 @ Amazon Espana
Memory G.Skill Ripjaws V 32 GB (2 x 16 GB) DDR4-3600 CL18 Memory €84.03 @ Coolmod
Storage Crucial MX500 1 TB 2.5" Solid State Drive €87.90 @ Amazon Espana
Storage Crucial P3 1 TB M.2-2280 PCIe 3.0 X4 NVME Solid State Drive €69.72 @ PCBox
Storage Seagate IronWolf Pro 14 TB 3.5" 7200 RPM Internal Hard Drive €274.00 @ Amazon Espana
Storage Seagate IronWolf Pro 14 TB 3.5" 7200 RPM Internal Hard Drive €274.00 @ Amazon Espana
Case Jonsbo N2 Mini ITX Desktop Case €165.02 @ Amazon Espana
Power Supply be quiet! SFX L Power 500 W 80+ Gold Certified Fully Modular SFX Power Supply €113.87 @ Coolmod
Custom JEYI NVMe M.2 to 5 Sata Adapter, Internal 5 Port Non-RAID SATA III 6GB/s M.2 NVMe Adapter Card for Desktop PC Support SSD and HDD -
Prices include shipping, taxes, rebates, and discounts
Total €1458.21
Generated by PCPartPicker 2024-02-10 15:45 CET+0100

The build is pretty overkill. It’ll work but it’s a tremendous expense and a lot of compute left unused. The mentioned workload can easily be handled by an NK6.
The guide is a guide. It’s a listing of parts that will get the job done. We aren’t familiar with markets much outside the US, and the availability and pricing shift a lot too. See what’s available by you closer to the guide, weigh the pricing versus the new build, see what you think, ask questions if specific things still aren’t certain to you, and take it from there.

This is a question that comes up a lot here from folks in Europe. It sounds like there is not a good market there for used computers or computer parts. Long story short I haven’t heard a good solution and it seems like a lot of people end up buying new.

The idea behind these guides is that by buying used gear a couple of generations old you can build a NAS for significantly less money than an off-the-shelf solution that will also have better performance and expandability. By buying new you will get tons of performance, way more than you can actually use in a NAS, but the price will also be higher than an off-the-shelf solution from Synology or Asustore etc. If it is more expensive than a comparable off-the-shelf then, depending on your needs, it may not be worthwhile to build it yourself.

For the build you outlined above it looks like you will be spending around €750 for the system not including storage and cache. It will have more than enough computing power to handle any NAS / Media server / transcoding tasks, but as stuffwhy pointed out it will be overkill for the task and will likely sit idle most of the time.

There are a few other options you might consider.

Off the Shelf Solution
You could get an off-the-shelf Asustore, Synology, Qnap, etc. Anything that can either run Linux as an OS or supports Docker out of the box. If you can find one with an N5105 or newer CPU that should be plenty for your use case including transcoding. It won’t have any options for upgrades or expandability but if it does everything you need it will cost less than building new. At least in the US these run around $400 - $500.

Unfortunately there is a good chance Unraid will not run on these so take that into consideration if you prefer Unraid. You can do everything you mentioned above on any OS that supports Docker containers, but the experience won’t be as good as Unraid.

Low End Off the Shelf + QSV Box
If you can find an inexpensive thin client, mini pc, firewall box, etc with an 8th gen or newer intel CPU you can use it as a stand alone Quick Sync Box to run Plex and handle transcoding. Then you can just get the cheapest off the shelf NAS that supports as many disks as you need. This is probably going to be the most cost effective solution.

Seek out local used gear
What happens to all the computers when businesses upgrade? What do regular folks do with their old hardware when they upgrade their gaming PCs? It must go somewhere, Unless it all just get shipped off to China for recycling? If you needed to sell an old computer where would you start? Maybe that would b a good place to look.

Used gear from China
There are many sellers on Ebay located in China that ship worldwide at relatively low cost. You can probably put together an NK6.0 level build for a reasonable price with parts shipped from China. The downside is shipping time; it typically takes a few weeks to get your stuff. I haven’t personally had any issues, but I imagine that returns might be tough if something arrives broken or DOA.

If none of the above options work for you there is certainly nothing wrong with spending a bit more and building a higher end server with new parts. It will run Unraid and fulfill all your NAS / Media server requirements easily and you will even have headroom to do some more compute intensive tasks or run a few VMs down the line.

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I agree on getting the Arctic F12 120mm 5 fan packs. They even daisy chain together to make wiring easier without a fan hub.

Thank you so much! Appreciate the info and the advice, I’m not on a time crunch so will look into the ebay option. Cheers!

Anyone else having terrible parity check speeds with this build on UnRaid? I’m only getting 9MB/s. I’m not sure what the bottleneck is. I’m think it’s the HBA or the drives (I bought these 6TB (RTG) Seagate ST6000NM0095 SAS3)

Can you share some details about your setup?

Unrelated, but you shouldn’t be doing parity checks more than once every quarter.

Sure. I’m also having the problem of disks going unmounted: unsupported partition layout after reboot. This is just the parity check on initial setup.


I’ve tried two different Adpatec HBA ASR79805 to no avail. I originally had the setup on an older ASRock mobo,i5-3870,DDR3, with the same issues. Just went ahead and upgraded to the ASUSE with DDR4, no change.

What case and how many fans and is a fan directly on the HBA

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Decade old NZXT case… can’t remember the model but it’s good size. 5 fans (2 intake front, 2 exhaust top, 1 exhaust back). Cooler Master Hyper 212 evo on the processor. It’s slow right after boot, so I don’t think it’s from overheating.

The Adaptec cards tend to run quite hot. Try putting a fan right on the heatsink on the HBA card and see if that helps the issue at all.

Its also possible that the HBA is just having issues unrelated to temperature.

I have the same problem. I removed the Adaptec HBA card and connected straight to the motherboard. My motherboard does have 2 x m.2 and 6 x SATA 3.0. Still need another 3 SATA port for expansion (2 Storage and 1 cache). I bought a LSI SAS9207-8i card but not install it yet. Getting it ready if I do run out of storage. My setup during the issue was on XFS and had to xfs_repair on those drives. My understanding on the adaptec card was that it was writing something on them. There are some had issue with the latest version of Unraid and HBA. I couldn’t get it to work so I stop fiddling with it. Hope this helps.

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That sounds a lot like my issue. Unfortunately all my drives are SAS so I can’t just plug into the mobo SATA. I guess I’ll start looking for a different HBA.

Are you using the latest Unraid version? If so, downgrade. There’s an issue with Adaptec HBAs.

I’ve got a TrueNAS Scale setup that I’d like to migrate out of the Dell R720XD electricity eater.

I’ve got 6 x ZFS storage drives (3.25) as well as 2 x apps drives (2.5) and a system drive (could be M.2 / NVMe).

I’d also like to have it rack mountable, and memory needs to be ECC.

Any recommended build that would meet these requirements?

Hi and welcome to Serverbuilds.

Can you provide more details about your use case? Besides TrueNAS Scale are you running additional VMs or containers? Probably most importantly do you require an integrated GPU capable of Quick Sync Video for media transcoding?

If you are running a media server and want transcoding for Plex or Jellyfin then you will likely want to go with an LGA 1151 Coffee Lake build similar to the NK 6.0. For ECC support you would need a C246 chipset motherboard such the X11SCA-F or similar and you will need to select an E-2100 or E-2200 Xeon or an 8th or 9th gen Core i3 CPU. Core i5, i7, and i9 do not support ECC RAM.

If you don’t need transcoding or you are planning on using a discreet GPU then you have more options such as the AMD AM4 platform or you could stick with the Xeon E5 server platform and just upgrade a couple of generations from V2 to V4. V4 will draw less power than your current V2 setup, but will still be a pretty big power hog compared to the more consumer focused platforms from AMD and Intel.

If you can let us know a little more about your use case we can probably provide more specific advice.

Hello all!! I just wanted to shared with you my NAS Killer 6.0 that I built!
I did not start from scratch, because I already had unraid running on another machine but this guide got me thinking about making a new one.
So this is what I bought:

What I already had from last build:

  • Case $59.99
  • (3) 8TB drives
  • (2) 2 TB M.2 drives (cache)
  • Power supply (from a friends old build)
  • Sata cables - SATA-III Cable

I made some mistake while buying the memory, I thought memory was memory, I had built PCs before, many of them!! but never a server, and I picked that i3 CPU because it can handle ECC memory, now but trial and error I came to find out the Supermicro motherboard only support UNBUFFERED ECC memory and that was not easy for me to find used so I bought it new from amazon, after buying another 2 sets of 32G memory that now I am going to try to return.

Over all, I am very happy with the outcome!
Now my next step is to do iGPU passthrough to my Jellyfin container and then move to my next project… Pfsense router upgrade!!!

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