to it in a smaller form factor. The module snapped to the notebook motherboard, and typically a heat spreader was installed and made contact with the module. However, with the 0.25 μm Tillamook Mobile Pentium MMX (named after a city in Oregon), the module also held the 430TX chipset along with the system's 512 KB static random-access memory (SRAM) cache memory. Models and variants Competitors After the introduction of the Pentium, competitors such as NexGen, AMD, Cyrix, and Texas Instruments announced Pentium-compatible processors in 1994. CIO magazine identified NexGen's Nx586 as the first Pentium-compatible CPU, while PC Magazine described the Cyrix 6x86 as the first. These were followed by the AMD K5, which was delayed due to design difficulties. AMD later bought NexGen to help design the AMD K6, and Cyrix was bought by National Semiconductor. Later processors from AMD and Intel retain compatibility with the original Pentium. List AMD K5, AMD K6 Cyrix 6x86 WinChip C6 NexGen Nx586 Rise mP6 See also List of Intel CPU microarchitectures List of Intel Pentium processors Cache on a stick (COASt), L2 cache modules for Pentium IA-32 instruction set architecture (ISA) Intel 82497 cache controller References External links CPU-Collection.de - Intel Pentium images and descriptions Plasma Online Intel CPU Identification The Pentium Timeline Project The Pentium Timeline Project maps oldest and youngest chip known of every s-spec made. Data are shown in an interactive timeline. Intel datasheets Pentium (P5) Pentium (P54) Pentium MMX (P55C) Mobile Pentium MMX (P55C) Mobile Pentium MMX (Tillamook) Intel manuals These official manuals provide an overview of the Pentium processor and its features: Pentium Processor Family Developer's Manual Pentium Processor (Volume 1) (Intel order number 241428) Pentium Processor Family Developer's Manual Volume 2: Instruction Set Reference (Intel order number 243191) Pentium Processor Family Developer's Manual Volume 3: Architecture and Programming Manual (Intel order number 241430) Computer-related introductions in 1993 Intel x86 microprocessors Intel microarchitectures Superscalar microprocessors 32-bit microprocessors X86 microarchitectures