Recommended hotfix for multi CPU systems, XP SP2

Grendel · Post by **Grendel** » Wed Dec 20, 2006 7:23 pm

http://support.microsoft.com/default.aspx/kb/896256

Computers that are running Windows XP Service Pack 2 and that are equipped with multiple processors that support processor power management features may experience decreased performance

Computers that are equipped with multiple processors that support processor power management features, such as Advanced Configuration and Power Interface (ACPI) processor performance states, require Microsoft Windows XP Service Pack 2 (SP2). Additional updates are available to optimize performance and behavior on computers that are running Windows XP SP2. Without these updates, computers that are equipped with these power management-capable, mobile, dual-core processors may experience decreased performance or unexpected behavior.

Windows XP SP2 is required on computers that have multiple CPUs that support ACPI processor performance states. This requirement includes computers that support the following items:

• Multiple physical sockets
• Multiple-core designs
• Multiple logical threads, such as Intel hyper-threading technology

Because Windows XP was not originally designed to support performance states on multiprocessor configurations, changes are required to correctly realize this support on multiprocessor systems. Windows XP Service Pack 2 includes the required changes to the kernel power manager. These changes make sure that Windows XP correctly functions on multiprocessor systems with processor performance states.

Released today. Download here.

Neo · Post by **Neo** » Thu Dec 21, 2006 2:42 pm

Cool! Thanks, yo! ^_~

AceCombat · Post by **AceCombat** » Thu Dec 21, 2006 7:36 pm

will install when i get home. i have a HT CPU

Krom · Post by **Krom** » Fri Dec 22, 2006 9:24 pm

Update applied, didn't notice any difference on my Core 2 Duo.

Sergeant Thorne · Post by **Sergeant Thorne** » Sat Dec 23, 2006 8:40 am

We can congratulate ourselves on having helped Microsoft, in some small way, to take over the world. I saw no difference either.

AceCombat · Post by **AceCombat** » Sun Dec 31, 2006 7:52 pm

i see some difference on my HT 3.0. boot time was cut down alittle

BUBBALOU · Post by **BUBBALOU** » Mon Jan 01, 2007 9:22 am

HT was ability was included with XP home and Pro for the HT instruction sets

XP Pro included for multiple(separate CPUs)

this fix is for Multiple CPU's on the same Die AKA dual core with power management instruction sets

Doubt any benefit will be seen on a HT CPU.... AceCombat

AceCombat · Post by **AceCombat** » Mon Jan 01, 2007 11:15 am

well it says right in the download its for HT CPU's but ohwell