Et1850_et1851 -

They utilize 240-pin PC3-10600 DDR3 DIMM sockets. You can often max them out at 4GB.

The and ET1851 are legacy budget desktop PCs from the early 2010s, originally produced by Acer’s low-cost sister brand, eMachines . While nearly identical in their simple black tower chassis, they served as entry-level "gateway" systems for home users during the Windows 7 era. Quick Technical Overview ET1850_ET1851

Are you looking to or reinstall the drivers for one of these older systems? Product Support - ET1850 | Acer United States They utilize 240-pin PC3-10600 DDR3 DIMM sockets

Features include an integrated memory card reader and a DVD-RW drive. Upgrade Potential and Modern Use While nearly identical in their simple black tower

Because the specs are modest, they perform significantly better with lightweight operating systems like Lubuntu or Puppy Linux . Are they Epson Printers?