" If you just purchased a system powered by Intel's Core i5 or i7 chipset, get ready for a return or repair. Intel has a chipset issue that affects the launch of Sandy Bridge."
"Specifically, Intel found a design problem in a support chip, the Intel 6 Series, which is code-named Cougar Point. In a nutshell, chipsets with Serial-ATA ports could degrade over time and hurt the performance of hard drives and DVD drives.
This potentially faulty chipset was used in Intel?s latest Core processors, or Sandy Bridge."
http://www.zdnet.com/blog/btl/intel-...-rollout/44257