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Upgrading is the process of replacing a product with a newer version of the same product. In computing and consumer electronics an upgrade is generally a replacement of hardware, software or firmware with a newer or better version, in order to bring the system up to date or to improve its characteristics.
The Intel Upgrade Service was a relatively short-lived and controversial program of Intel that allowed some low-end processors to have additional features unlocked by paying a fee and obtaining an activation code that was then entered in a software program, which ran on Windows 7.
The i486SX was a microprocessor originally released by Intel in 1991. It was a modified Intel i486DX microprocessor with its floating-point unit (FPU) disabled. It was intended as a lower-cost CPU for use in low-end systems—selling for US$258—adapting the SX suffix of the earlier i386SX in order to connote a lower-cost option.
Processor Series nomenclature Code name Production date Features supported (instruction set) Clock rate Socket Fabri-cation TDP Cores (number) Bus speed Cache L1 Cache L2 Cache L3 Overclock capable 4004: N/A N/A 1971 - Nov 15 [clarification needed] N/A 740 kHz DIP 10-micron 2 N/A N/A N/A 8008: N/A N/A 1972 - April good [clarification needed] N ...
Typical 386 upgrade CPUs from Cyrix and Texas Instruments. Intel later offered a modified version of its 486DX in i386 packaging, branded as the Intel RapidCAD. This provided an upgrade path for users with i386-compatible hardware. The upgrade was a pair of chips that replaced both the i386 and i387.
Cyrix 5x86 (M1sc) was a cost-reduced version of the flagship 6x86 (M1). Like Intel's Pentium Overdrive, the Cyrix 5x86 used a 32-bit external data bus. While AMD's Am5x86 was little more than a clock-quadrupled 486 with a new name, Cyrix's 5x86 implemented some Pentium-like features.
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Celeron is a series of IA-32 and x86-64 computer microprocessors targeted at low-cost personal computers, manufactured by Intel from 1998 until 2023. The first Celeron-branded CPU was introduced on April 15, 1998, and was based on the Pentium II. Celeron-branded processors released from 2009 to 2023 are compatible with IA-32 software.