Dwight, The suffix goes after the cpu number. Full number is 80386, there are two kinds, 386DX (full 32bits) and crippled version of 386 is 386SX is narrowed down to 16bits data path to the pins but rest of core is true 386. Reason for 386SX came out was it is crippled in performance for a reason not to cut into 386DX price/performance and can be fitted easily into 286 chipset design with minimum design and new set of BIOS programming. Came out mid 1989 by the way, appox same time as 486DX, shortly after then 486SX as well. I never liked 386SX except if motherboard had some cache installed with good chipsets. Only time son of 386SX shined was IBM 386SLC and 486SLC2 and 3. They had larger internal caches and performed well. I don't like 486SX either because of no FPU but good in embedded stuff. Thank god that AMD broke down the price barrier when they came out with Am386 and Am486 processors back then. That when I bought 386DX-40 then 486DX-40 couple years afterwards. My first crappy PC in 90 was generic board (sucky C&T chipset anyone? Shudders), with 386DX-25 no cache. I learned fast to use good stuff at that point. Cheers, Wizard