Power Performance Tuning设置：BIOS Controls EPB与OS Controls EPB的区别

huangtf

BIOS升级之前，是 *[01]BIOS Controls EPB，不知道是谁改的：
Setup Question        = Power Performance Tuning
Help String        = Options decides who Controls EPB.In OS mode: IA32_ENERGY_PERF_BIAS is usedIn BIOS mode: ENERGY_PERF_BIAS_CONFIG is usedIn PECI mode: PCS53 is used
Token        =CF6        // Do NOT change this line
Offset        =51
Width        =01
BIOS Default=[00]OS Controls EPB
MFG Default=[00]OS Controls EPB
Options        =[00]OS Controls EPB        // Move "*" to the desired Option
         *[01]BIOS Controls EPB
         [02]PECI Controls EPB


BIOS升级之后，恢复默认值*[00]OS Controls EPB：
Setup Question        = Power Performance Tuning
Help String        = Options decides who Controls EPB.In OS mode: IA32_ENERGY_PERF_BIAS is usedIn BIOS mode: ENERGY_PERF_BIAS_CONFIG is usedIn PECI mode: PCS53 is used
Token        =01        // Do NOT change this line
Offset        =51
Width        =01
BIOS Default=[00]OS Controls EPB
MFG Default=[00]OS Controls EPB
Options        =*[00]OS Controls EPB        // Move "*" to the desired Option
         [01]BIOS Controls EPB
         [02]PECI Controls EPB

请问各位前辈，BIOS Controls EPB与OS Controls EPB有啥区别？  谢谢！