4 ms·
Today I learned that the "s" in SX means "single" and "d" in DX means double. The DX has double the data bus width of the SX (32-bit vs 16-bit).
by macote 3y ago
Today I learned that the "s" in SX means "single" and "d" in DX means double. The DX has double the data bus width of the SX (32-bit vs 16-bit).
- christkv 3y agoThe 386sx was my first overclock switching time crystals out on the board.
- kens 3y agoBut then the 486 DX has a floating-point unit, while the 486 SX does not. So Intel just went with DX is better than SX.
- RachelF 3y agoThere were rumours that the DX and SX chips were exactly the same: Intel zapped the FPU on the SX to disable it. Apparently it cost more to make, but sold for less.
- chasil 3y agoThe (80-bit) floating point in historic Intel processors is deprecated, FYI. After the exchange of MMX and 3d-NOW, it was AMD that adopted Intel SSE into amd64. https://en.m.wikipedia.org/wiki/Streaming_SIMD_Extensions https://en.m.wikipedia.org/wiki/Streaming_SIMD_Extensions