> Penryn Family の倍率情報 これが関係ありそうです
IntelR 64 and IA-32 Architectures Software Developer’s Manual
Volume 3B: System Programming Guide, Part 2
Order Number: 253669-025US November 2007 http://www.intel.com/design/processor/manuals/253669.pdf
APPENDIX B MODEL-SPECIFIC REGISTERS (MSRS)
B.2 MSRS IN THE INTELR CORE. 2 PROCESSOR FAMILY
2AH: bit-18
N/2 Non-Integer Bus Ratio.(R/O)
0 = Ingeger ratio; 1= Non-integer ratio
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