After getting negative reviews for the recently released AMD Bulldozer patch, Microsoft has decided to withdraw it because of the low performance issues reported in Windows 7 PCs with AMD Bulldozer. The patch was supposed to offer support for SMT, a technology that was introduced by AMD Bulldozer.
This hotfix has been described by Microsoft as a mean to bring the 8-core chips to the level of performance they were supposed to show. The withdrawal was done because Windows 7 identifies the AMD Bulldozer chip as a quad-core processor with eight threads instead of an 8-core processor. Released on Friday itself, the patch was pulled within 24 hours by Microsoft completely. This act of Microsoft surprised AMD. “There are actually two updates needed for AMD Bulldozer CPU architecture and Microsoft just posted the first patch. Sadly the first one was not a lot of good without the second and AMD did not believe users would benefit in any way from it,” said the spokesman of AMD. The spokesman further stated that the patch was scheduled for release in the first quarter of 2012. This indicates that it was prematurely released by Microsoft.
"As part of our joint work to optimize the performance of 'Bulldozer' architecture-based AMD processors we are collaborating on a scheduler update to the Windows 7 code-base," said Microsoft after withdrawing the patch.
Microsoft had claimed that the patch would improve performance by anywhere in between 2% to 7%. Hopefully, the patch will return and possibly even come closer to AMD's claimed performance boost of 10% as it has been experienced with the beta version of Windows 8.