My favorite werido white-box PC company is GEM Computer Products out of Norcross Georgia...I've owned two of them, a 386 DX-20, and a 286/10 that I still have (albeit OC'd to 12 Mhz via a math co-processor) - as if my Avatar was not a clue enough
http://www.trademarkia.com/gem-computer-produ … s-75316498.html
Here's some pictures of their computers....
an early 286 system they made using an XT case that was on E-bay
1989-1991 era 80286 Based System I Own - Octek Motherboard
Late eighties Deskpro clone they made (with replaced LED lights), this one was a 386 DX-20 with an Addonics Motherboard
Apparently they were still going well into the 1990's here's a YouTube video of someone running a Pentium system from the mid 90's - https://www.youtube.com/watch?v=RSi6RpFCQ9o
They were owned by a company called MEC - or Micro Electronics Corporation - also based out of Norcross. They seemed to have hit a stride sometime in the late 80's/early 1990's because they started to make a series of southeastern bible-belt area chain stores called C.MORE where they sold C.MORE (and maybe also GEM and MEC branded equipment).
Apparently they made some kind of upgrade board back in the 80's too, as I found them credited in an old copy of PC Mag or InfoWorld on Google Books....not sure.https://books.google.com/books?id=BD8EAAAAMBA … ucts%22&f=false
One of the thing I noticed about their computers that I find kind of amusing is they use HUGE cases for everything, then put in tiny little baby AT/XT-class motherboards. Even the 386 I had was full AT and it had a baby AT Addonics motherboard in it. They seemed to have some deals worked out with Magitronic (cases?, power supplies), Addonics (motherboards, monitors), Samsung (keyboards), Octek (motherboards), Seagate (hard disks), Western Digital (controller cards), and Mitsubishi (floppy disks) when it came to the supporting hardware they put in their products.
I according to Trademarkia, MEC is the mothership, GEM is their military branch, both of the GEM computers I own/owned came from ex-military people. C.MORE was their consumer branch and sort of their "Geek Squad" of sorts. I'm always looking out for these beasties on E-bay, especially the Deskpro style chassis they used for the 386 since that's the coolest looking one IMHO.
I hazard to guess that what happened to GEM/MEC/C.MORE was the stores went away first, and my fuzzy mind recalls seeing one at Peach Tree Mall as a kid. Then MEC stopped being used, because it seems GEM was used at the end. They probably just folded due to changes in business climate like most local businesses do. Their old location at 2900 Jones Mill Road looks abandoned, looks like a cool old 80's/90's tech company purpose made building.