Hey OCAU.. Heads up for those wanting a PC / Workstation.. built like a tank.. Consider the HP Z440.. I use these at work.. and found them as pretty reliable workhorses.. but uber expensive.. Then One came up on the forums.. https://forums.overclockers.com.au/threads/hp-z440-xeon-workstation-500-instant.1259941/ https://forums.overclockers.com.au/threads/hp-z440-xeon-workstation-6core-16gb-gtx1080ti.1258705/ https://forums.overclockers.com.au/threads/hp-z440-e5-1620-v3.1246555/ Yes its the same machine handed around OCAU.. I couldn't convince the last owner to send it to Melbourne for a reasonable price.. But eventually.. I really wanted one of these... So I pickup up one from Ebay for Around $750 ($800 - minus discount) complete with 32gb of ram an a E5-1650V3, basic video and 2tb... and a spare carcass (case / motherboard / HSF) for ($200 ($220 minus discount) for parts.. After a few teething issues getting Windows 7 Pro on to the machine.. as expected, everything was pretty nice. Starting looking at the possible memory options and CPU options.. for the "Carcass"... The officially support CPUs are limited to single enabled Xeon, and a couple of higher core 8 cpu dual enables variants (in single mode) I found a single post on the net.. about a person dumping a i7-6850K broadwell cpu in the machine with no issues.. which was kind of unexpected..... The short story is 1) i7-6900K works with no problems.. tested in windows 10 ecc fully working as far as I can tell with all the test.. 2) Have booted to bios with a E5-2675v3 (16 core) and a i7-5960X (8 core) with no issues.. CPU fully recognised in bios So good news.. Currently for $220 - 10% ebay coupon..you get the Z440 carcass, with powersupply, CPU HSF and Memory Cooler and Front Card Cooler with the upgraded 700w PSU with two 6 pin power connectors. (Bonus sticky tape residue, will give you hours of fun to remove) (the the superficial scratches, can be touched up with a black texture) CPU - Probably all non ES socket 2011v3 should work despite not being officially supported.. I would stay away from the 28 lane variants. (ie the 5820K and 6800K) Bad news ECC DDR4 - Buffered / Registered Ram (RDIMM) is required...quad channel (4 identical sticks is the way to go) quite tricky to find.. and can be expensive.. but sometimes can obtain at a reasonable price.. (managed to get $400 for 8x8gb sticks.. currently waiting to arrive) NON ecc and ECC UDIMMs do not work... (I have already tried..) It all for $200/$220 for the case https://www.ebay.com.au/itm/HP-Z440...h=item340560de01:g:YgEAAOSwtLxcW~Rf:rk:4:pf:0 Bonus if you are lucky.. machine.. may be under warranty... my carcass expires on the 26/4/2020 and the complete machine ends in OCT 2019.. ALhtough claiming warranty would be difficult when missing the original confugation. $200 for 32gb of ram (your price may vary) + CPU + HDD/SSD + Videocard.. You will have a very capable.. and quiet ECC / Workstation / Home computer.. This machine is really really quiet.. I would be extremely difficult / near impossible to build an air cooled machine this quiet. I would not have bother posting this.. but after buying the last machine.. the seller promptly relisted another 5... indicating.. they have a stash of these around.. Godd luck to those.. who have the time and money to muck around. with this sort of gear..