It would have been pretty unusual to get a 386 with only 640k in 1992 - from memory. And it wouldn't make sense given the cost of a still reasonably expensive

It would have been pretty unusual to get a 386 with only 640k in 1992 - from memory. And it wouldn't make sense given the cost of a still reasonably expensive CPU despite the albeit expensive cost of memory then. Typical RAM (home/business PC) would have been ~2-4MB, with 8MB+ considered quite high. A low end box then would still have been a 286, or a 386SX at a low clock speed, if going with Intel, but at that point AMD were releasing 386DX-40 which from a price/performance perspective made it a big winner in the mid-level processor market vs the still quite new (and more handicapped versions, like SX at 20/25MHz) 486, plus motherboards were a thing, far less commodity-like than today. In those days even having a CD drive was a big deal, and higher clocked 486DXs were pretty pricey.