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Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual See AP-485, Intel Processor Identification and the CPUID Instruction (Order Number 241618) for more information on PSN. 04H, EAX, Bits 4-0: Cache Type**. CPUID (CPU Identification) is a set of instructions that is used to fetch information about the Processor such as Processor Topology, Cache Size and muchCopies of documents which have an order number and are referenced in this document, or other Intel literature may be obtained by calling 1-800-548-4725 or by and identify Intel® processors based on the updated Brand ID CPUID instruction not only provides the processor signature, but also provides information Provides processor identification information in registers EAX, EBX, ECX, and EDX. See AP-485, Intel Processor Identification and the CPUID Instruction The Intel® Processor Identification Utility reports the CPUID information for the tested processor, located under the CPUID DATA tab of the tool. Returns processor identification and feature information to the EAX, EBX, ECX, and EDX registers, as determined by input entered in EAX (in some cases, ECX as The primary means of identifying a modern x86 or x64 processor is the cpuid instruction. This was developed in the early 1990s for what was then Intel's new