We also had a Pentium 75 MHz IIRC, but IIRC it came with 8 MB RAM. It came with OS/2 Warp. Running DOS on top of it was too limited, performance wise. Running MSDOS directly however, was amazing. The machine would run all the software I wanted. Apps and games. It also ran Windows 95, but the learning curve and speed. I was used to MSDOS.