AMD 3200 Revision History - Page 63
Kernel, Developer's, Guide, Family, Models, Processors
UPC - 730143241144
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48063 Rev. 3.18 October 2012 Revision Guide for AMD Family 15h Models 00h-0Fh Processors 689 AM3r2 Six Core Processor May Limit P-State When Core C6 State Is Disabled Description If system software disables core C6 state (CC6) on an AMD FX™ 6100 Six-Core Processor, OPN FD6100WMW6KGU, the application power management (APM) incorrectly limits the processor P-state to a low performing P-state. Refer to the BIOS and Kernel Developer's Guide (BKDG) for AMD Family 15h Models 00h-0Fh Processors, order# 42301 section "Core C6 (CC6) State" for the conditions under which CC6 state is disabled. Potential Effect on System None expected under normal circumstances, as AMD recommends that CC6 is enabled in all systems. In the event that the system software implements an option to disable CC6, the system may experience low performance in this mode. Suggested Workaround AMD recommends that CC6 is enabled. This erratum does not apply in this case and no workaround is necessary. In the event that system software disables CC6, disable APM using Core Performance Boost Control Register[ApmMasterEn] (D18F4x15C[7]) = 0b. To avoid unnecessarily disabling APM on unaffected parts, the following conditions should be met before implementing this workaround: • CC6 is disabled. • CPUID Fn8000_0001_EBX[31:28] (BrandID Identifier[PkgType]) = 0001b (AM3r2 package type). • CPUID Fn8000_0008_ECX[NC] (APIC ID Size and Core Count[Number of Physical Cores]) = 5. • D18F4x150[7:0] = 6Bh. • D18F4x10C[11:0] (TDP Limit 2 Register[NodeTdpLimit]) = 130h. Fix Planned Yes Product Errata 63