Intel Fixes VT-d Bug in Sandy Bridge-E CPUs

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Intel will be shipping its i7-3960X Extreme Edition and i7-3930K processor in C2 stepping in January, the company revealed in a product change notification (PCN) this week.

The C2 stepping removes the VT-d bug in C1 CPUs, which affected the CPU's hardware accelerated virtualization support.

Intel told its customers that it does not anticipate "change to customer platforms designed to Intel guidelines." However, if a customer chooses to enable Intel VT-d, "regression testing is recommended to ensure their board is properly enabled," the PCN states. Those customers who prefer their own BIOS will have to install the latest Microcode update to support the C2 stepping.

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Wolfgang Gruener
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Wolfgang Gruener is an experienced professional in digital strategy and content, specializing in web strategy, content architecture, user experience, and applying AI in content operations within the insurtech industry. His previous roles include Director, Digital Strategy and Content Experience at American Eagle, Managing Editor at TG Daily, and contributing to publications like Tom's Guide and Tom's Hardware.