Intel Core 2 Extreme QX9300 BX80562QX9300 User Manual

Datasheet

19

The processor supports Dual Intel Dynamic Acceleration. For any two cores in the 

quad-core processor, the Dual Intel Dynamic Acceleration feature allows one core to 

operate at a higher frequency point while the other core is inactive and the operating 

system requests increased performance. Thus, quad-core processor could enter Dual 

Intel Dynamic Acceleration when two cores are idle and the other two are active. This 

higher frequency is called the opportunistic frequency and the maximum rated 

operating frequency is the ensured frequency.

Dual Intel Dynamic Acceleration enabling requires exposure, via BIOS, of the 

opportunistic frequency as the highest ACPI P state

The processor incorporates the PSI# signal that is asserted when the processor is in a 

reduced power consumption state. PSI# can be used to improve intermediate and light 

load efficiency of the voltage regulator, resulting in platform power savings and 

extended battery life. The algorithm that the processor uses for determining when to 

assert PSI# is different from the algorithm used in previous mobile processors.

PSI-2 functionality improves overall voltage regulator efficiency over a wide power 

range based on the C-state and P-state of the four cores. The combined C-state of all 

cores are used to dynamically predict processor power. The PSI-2 functionality logic 

diagram is shown in 

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