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AMD Bulldozer Performance Hotfixes for Windows 7 arrive

Posted on Thursday, January 12 2012 @ 15:46:31 CET by

NGOHQ noticed Microsoft has released the two AMD Bulldozer performance hotfixes for Windows 7:
KB2645594 (install this first)
The CPU scheduling techniques that are used by Windows 7 and Windows Server 2008 R2 are not optimized for the AMD Bulldozer module architecture. Therefore, multithreaded workloads may not be optimally distributed on computers that have one of these processors installed in a lightly-threaded environment. This may result in decreased system performance for some applications. When this update is installed, the scheduler will be aware that your Bulldozer processor contains dual-core modules. In essence, threads 1-4 now get assigned to their own module first.

KB2646060 (should only be installed after KB2645594)
The CPU Power Policies that are used by Windows 7 and Windows Server 2008 R2 are not optimized for the dual core AMD Bulldozer module architecture. This can result in decreased system performance with multithreaded workloads in lightly-threaded environments. When this update is installed, Bulldozer modules will be less likely to achieve the C6 power state. This potentially results in increased power consumption in more lightly-threaded environments.



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