Cyrix Cx486(DLC/SLC) & 5x86
Cx486(D/SLC)/5x86 ► 6x86/6x86MX/MII
See also: IBM 486, ST 486, TI 486, Intel i486, AMD Am486
Switch to the die picture page!
Cyrix Cx486DLC
The Cyrix Cx486DLC was an early 486 CPU from Cyrix, intended to compete with the Intel 486SX and DX. Texas Instruments, who manufactured the 486DLC for Cyrix, later released its own version of the chip, the TI486SXL, with 8 kB internal cache vs 1 kB of the original Cyrix design.
Cyrix Cx486DLC 33 MHz
CPU die picture:
Cx486DLC-33GP
Family Cx486DLC
CPU part number Cx486DLC-33GP
Manufacturing Date ?
Socket ?
Microarchitecture Cx486 (?)
Codename ?
Transistors 600000
L1 Cache 1 KB
Floating Point Unit (FPU) None / 80387 capable
Cyrix Cx486DRx² 20/40GP
Cx486DRx²20/40GP
Family Cyrix Cx486DRx²
CPU part number Cx486DRx²20/40GP
Socket -
Microarchitecture ?
Cyrix Cx486 DX
Cyrix made a variety of 486-compatible processors, positioned at the cost-sensitive desktop and low-power (laptop) markets. Unlike AMD's 486 clones, the Cyrix processors were the result of clean-room reverse-engineering. They offered 2 or 8 KB of cache. Clock-for-clock, the Cyrix-made chips were generally slower than their Intel/AMD equivalents, though later products with 8 KB caches were more competitive, if late to market.
Cyrix Cx486 DX-40
CPU die
Cx486DX-40GP
Family Cyrix Cx486
CPU part number Cx386DX-40GP
Introduction ?
Manufacturing Date 41st week of 1995
Socket Socket 2/3
Microarchitecture 80486
Codename M6
Cyrix Cx486 DX2
Cyrix Cx486 DX2-66
Kindly donated by Pauli Rautakorpi.
Cx486DX2-66GP
CPU part number Cx486DX2-66GP
Introduction September 1993
Cyrix Cx486 DX2-V66
Cx486DX2-V66GP
Cyrix Cx486
Socket 2/3
Cyrix 5x86
Released in August 1995, four months before the more famous Cyrix 6x86, the Cyrix 5x86 was one of the fastest CPUs ever produced for Socket 3 computer systems. With better performance in most applications than an Intel Pentium processor at 75 MHz, the Cyrix Cx5x86 filled a gap by providing a medium-performance processor option for 486 Socket 3 motherboards (which are incapable of handling Intel's Pentium CPUs, apart from the Pentium OverDrive).
The Cyrix 5x86 processor, codename "M1sc", was based on a scaled-down version of the "M1" core used in the Cyrix 6x86. It had the 32-bit memory bus of an ordinary 486 processor, but internally had much more in common with fifth-generation processors such as the Cyrix 6x86, the AMD K5, and the Intel Pentium, and even the sixth-generation Intel Pentium Pro.
Cyrix 5x86-100
5x86-100GP
Family Cyrix 5x86
CPU part number 5x86-100GP
Microarchitecture 5x86
Codename M1sc
Multiplier 3
L1 Cache 16 KB
Power consumption 3 Watt
Vcore 3.45 Volt
DX: 33 MHz, 50 MHz
DX2: 50 MHz, V80 MHz
DX4: 75 MHz, 100 MHz
S: 25 MHz, 33 MHz, 40 MHz
5x86: 80 MHz, 120 MHz, 133 MHz
RETURN TO CYRIX