intel-microcode 1.20120606.v2.2 (amd64 binary) in ubuntu raring

 This package contains updated system processor microcode for
 Intel i686 and Intel X86-64 processors. Intel releases microcode
 updates to correct processor behavior as documented in the
 respective processor specification updates.
 .
 Installing iucode-tool is recommended, as it can automatically
 limit the selection of Intel processor microcode files installed
 into the initramfs, reducing initramfs bloat by a large factor.
 .
 For AMD processors, please refer to the amd64-microcode package.