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$3-500 USD Bang for your Buck Systems. New vs Old for the workbench or home

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beanflying:
Until now I have been making do with a retasked I3 HP 8300 on my bench. Recently fitted with a cheap secondhand Quadro graphics card and 8GB of memory it has been 'coping' with most demands for bench but also crashing under Fusion 360 jobs. This is getting a replacement  as per another thread but this is bringing on a reshuffle of PC's in the shack and home.

What I am planning to build in this case for it is a small form factor more modern and better performing replacement for it. In my case this is heading to the house to allow me to do some CAD work in comfort and not have to struggle with my I5 Laptop which doesn't like Fusion 360 much and the tiny Atom based box I have inside is browsing and movie watching at best.

As a result of the recent AMD releases I scored a cracker deal on a last gen Ryzen 5 2400G APU (CPU with inbuilt graphics) so apart from high frame rate gaming doesn't need a graphics card. So the plan is the following BOM.

Ryzen 5 2400G
B450 I Wifi board (either MSI or Gigabyte depending on price) and will run dual monitors if needed but can be done cheaper with larger boards or even 350 series.
16GB DDR4 3200MHz memory (G.Skill was the winner on $ but prices seem to be rising)
Used FSP250-50GLV power supply because they are slimline and fairly common 250W is plenty even with adding a 1050 ti later.
NVMe SSD 250-500GB Most likely another Samsung 500GB as there is still a rebate on and some good deals.
Case DIY Laser cut - because I can. Rough maximum dimensions 200x100x300

Spec as above and allowing $30 for case bits comes out just over $400 USD

The question for others is buy a used work station for $150-300 or build a new box for the bench or bedroom?

Woody the ITX roughy.

[attachimg=1]

tautech:
A Ryzen woody.......  :popcorn:
Following.  :)

SilverSolder:
Interesting project just for the coolness factor...

Could there be potential problems with a wooden case, radiating EMI from the PC circuitry into the lab environment?   Might be safer to design with wood cladding on an aluminum case?

beanflying:

--- Quote from: SilverSolder on July 18, 2019, 04:35:59 pm ---Interesting project just for the coolness factor...

Could there be potential problems with a wooden case, radiating EMI from the PC circuitry into the lab environment?   Might be safer to design with wood cladding on an aluminum case?

--- End quote ---

Mine is going inside the house so a non issue with test gear. Given the trend to Glass or Plastic sided commercial cases going timber makes no real difference over them. As to Lab use and emi in or out causing potential problems  :-//

It would be easier to bond a thin copper shielding sheet (< 0.5mm) to the wood after assembly rather than tooling and machining heavier metal then cladding in timber. Or there is EMI coatings or a quick search found this product at E14

The SMPS is already metal canned and shielded and likely the largest potential source of Hash.

SilverSolder:
I like the copper sheet shielding idea.

Apart from shielding the outside world from EMI, it also protects the PC against static zaps that could reset it at inopportune moments...  (ask me how I know...) 

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