Thank you all for info guys ,
How ever thing’s have changed a little , those parts above are now not in play ( been used else where now )
So im thinking about second hand severe parts , how ever i dont know what i should be looking for, ( gaming parts not a problem, i know quite abit) but severe parts not sure what i should be looking for
I know i would need ECC ram , but what about cpu and motherboards ?
Something thats not over kill for a little NAS/ severe
Its mATX, so not sure if it fits in your case.
Gives me somewhere to start , thanks 
however I’m in the UK , So will have a look for something like that on the UK’s ebay
Look for xeon D (embedded), atom (embedded), possibly xeon E on supermicro or asrock rack motherboards.
or these too old?
The x10 are getting a bit long in the tooth. Tdp 80 watts. But it would work. Only 4x sata3 tho. And 2x sata2
Which (size of) case? How many drives do you expect to need? Which networking speed?
The Xeon W3690 is definitively too old, unless you’re also looking for an extra heater for next winter.
The Xeon E3 is more in line with what you could use, tough it wouldn’t hurt if it were of a later DDR4 generation. Got an extra £25?
(TDP is irrelevant, what matters most is idle power.)
Don’t a case at the moment, was going to find an oldish one with a few drives bays ( no need for a flashy one) shouldn’t too hard …
I have 3x3tb and 2x6tb ( and just ordered a 12tb one which’s comes in a few days ) so 6 in total
probably will only need gigabyte speed ( my switches are one gb )
Just noticed that it doesn’t have iGPU , so going to need a GPU … for Plex transcoding ??
What are you going to do with the single 12tb drive ?
Nothing for the moment , going to order an other one , should of waited and bought two of them 
Yes
There is a whole lot of stuff on planning parts in the new-ish Planning section of Uncle Fester’s Beginners TrueNAS Guide that might be helpful.
You only need a GPU for Plex Transcoding if:
a. You are doing more batch transcoding than your CPU can cope with; or
b. You are doing real-time transcoding of high quality video; AND
c. You have a Plex subscription.
TBH, if you need to transcode down real-time because e.g. of LAN bandwidth issues, you might actually be better off investing in a LAN speed upgrade than a GPU.
That depends whether you need transcoding and can’t or don’t want to do it on the GPU.
It shouldn’t be too hard or too expensive to find an E3v5/6 (or Core i3-6100/7100) with an iGPU anyway.
Still on putting this together ,
however the Seagate Exos drive arrived , but it’s a HSMR drive , are these any good?
the idea now is to have this as a “backup” drive , not connected to anything - just stored away with my media data on it … ( say a 3rd backup)
is it worth keeping or send it back ?
going with the with 4x3tb and 2x6tb drives total of roughly 15tb ( more likely be 14tb)
I don’t think that HSMR is a form of SMR - I believe that this drive is CMR. But others may know better.
This kind of drive? Go straight to the conclusion…
They are totally unusable. Not only they are SMR but “Host-Managed” means that they expect special drivers for the OS to manage the SMR part in place of the drive controller.
Thanks , ill send it back 
I am confused. I read that they were CMR as sold.
See also a new post: Are Seagate EXOS X14 HSMR drives TrueNAS ready?
On a side note, while building a just-for-fun NAS, using a consumer board with a Xeon CPU and the x16 slot populated by an HBA, I had to buy an x1 nVidia Quadro NVS300 because it would just not boot without a graphics card… 
