Upgrading Processor On Windows Server 2008 R2 64 Bit

I have a site that will be upgraded from a 4 core, non-hyperthreaded Xeon to a 6 core hyperthreaded Xeon processor. I know Windows XP/Server 2003 had a Hardware Abstraction Layer (HAL) that presented challenges when upgrading processors. Does Server 2008 R2 64 bit have the same issue or will it automatically identify the hardware change without issue upon boot?

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