tietääkseni SP3:sen piti tuoda paranneltu tuki myös neliytimisille prossuille XP koneille... en tiedä varmaksi, mutta jostain netistä olen sen lukenut ainakin SP2:lla "piti" tehdä erillinen patchaaminen jolla korjattiin jotain suorituskykyongelmia neliytimisille prossuille... liekkö sitten auttanu sekään todellisuudessa mitään.
SYMPTOMS When either of the following conditions is true for a Windows XP-based computer, Windows incorrectly reports the number of physical processors: • The computer uses one or more hyperthreading-enabled processors. • The computer uses one or more multicore processors. Note On a computer that is running Windows Vista, Windows correctly reports the number of physical processors. Back to the top CAUSE This issue occurs because Windows XP does not have the functionality to detect hyperthreading processors and multicore processors. This functionality was introduced in Windows Vista by using the Win32_ComputerSystem class and the Win32_Processor class in Windows Management Instrumentation (WMI). Back to the top RESOLUTION A hotfix is available to resolve this problem. After you apply this hotfix, the behavior of the Win32_ComputerSystem and Win32_Processor classes in Windows XP is the same as the behavior of these two classes in Windows Vista. Back to the top Hotfix information A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix. If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support) Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. Prerequisites To apply this hotfix, you must have Windows XP Service Pack 2 (SP2) installed on the computer. Tuon löysin microsoftin sivuilta...
Mitä taas itse löysin guuglaamal, niin home edition ei tukisi moniytimisii ja professional edition tukis 4-coreen asti. Tietysti kun sp1&2&3 on tullut, niin tukea on voitu laittaa kumpaankin editioniin. EDIT: sigin käyttis+kone, eikä ole mitään säätöjä tarvinu tehdä erikseen, että suostuisi tukemaan quad corea.
