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The purpose of overclocking is to increase the operating speed of a given component. [3] Normally, on modern systems, the target of overclocking is increasing the performance of a major chip or subsystem, such as the main processor or graphics controller, but other components, such as system memory or system buses (generally on the motherboard), are commonly involved.
On February 9, 2016, Intel announced that it would no longer allow such overclocking of non-K processors, and that it had issued a CPU microcode update that removes the function. [32] [33] [34] In April 2016, ASRock started selling motherboards that allow overclocking of unsupported CPUs using an external clock generator. [35] [36]
The Core microarchitecture is Intel's final mainstream processor line to use FSB, with all later Intel processors based on Nehalem and later Intel microarchitectures featuring an integrated memory controller and a QPI or DMI bus for communication with the rest of the system. Improvements relative to the Intel Core processors were:
With CPUs being multiplier locked, the only way to overclock is to increase the BClk, which can be raised by only 5–7% without other hardware components failing. As a work around, Intel made available K/X-series processors, which feature unlocked multipliers; with a multiplier cap of 57 for Sandy Bridge. [ 45 ]
Unsupported Haswell is the codename for a processor microarchitecture developed by Intel as the "fourth-generation core" successor to the Ivy Bridge (which is a die shrink / tick of the Sandy Bridge microarchitecture ). [ 1 ]
The later Pentium III Coppermine-core processor was easily overclocked and performed well on 440BX motherboards. Finally, the unsupported Tualatin-core Pentium III could be used with an adapter and various modifications, with varying degrees of success. Ironically, the 440BX offered better performance than several of its successors.
Unsupported: Pentium D [2] is a ... Overclockers have been able to overclock the core to 4.26 GHz using air cooling simply by raising the unlocked CPU multiplier ...
Unsupported: The Pentium Pro is a ... Because of this, the CPU could read main memory and cache concurrently, ... Some users chose to overclock their Pentium Pro ...