Intel released relabeled versions of its quad-core Core 2 Quad Yorkfield Q9400 and Q9x50 processors as the Xeon 3300-series (product code 80569).
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On 11 November 2007 Intel presented Yorkfield-based Xeons – called Harpertown (product code 80574) – to the public.
The P35 Express chipset supports Intel's LGA 775 socket and Core 2 Duo and Quad processors, and is also known to support 45 nm Wolfdale/Yorkfield dual and quad core CPUs.