AMD Athlon II X3 Tri Core 425 2.70GHz (Socket AM3) Processor

Description:

Athlon II X3 family was the last Athlon II family launched in 2009 - dual-core Athlon II CPUs were announced in June 2009, quad-core Athlon II processors were introduced in September, and triple-core X3 family was released in October. One of the first triple core Athlon II microprocessors was Athlon II X3 425. The 425 is based on Rana core, which is similar to quad-core Propus core with one core disabled. It is possible to unlock the disabled core on this and other Athlon II X3 processors on some socket AM3 motherboards by switching "Advanced Clock Calibration" BIOS option to "Auto". We unlocked the forth core on Athlon II 425 CPU, that we tested, but the unlocked core turned out to be defective. When the forth core was enabled, BIOS reported processor as "AMD Athlon(tm) II X4 B25 Processor". We could boot the system into DOS, which uses only one core. The system couldn't be booted into OS that supports all 4 processors. An attempt to unlock the forth core on our Athlon II X3 435 failed completely - with the forth core enabled, the system could not even pass BIOS Power-On Self Test.

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