Sorry to disagree, but that's not what I was told by the product engineers in Folsom. Maybe they bought some and I don't remember the mix but most was made in house.
Just the Xeon full speed cache SRAM. Intel bought the chips for desktop Pentium IIs and IIIs.
"When Intel moved its CPUs from Socket 7 (Pentium) to Slot 1 (Pentium II) packaging, it began buying the SRAM chips itself for integration onto the CPU modules. Previously, the SRAMs came on separate memory boards, which PC manufacturers purchased and installed, along with the CPU and other components and add-in cards, on the motherboard.
Only a few SRAM companies supply Pentium II L2 cache. Intel does not identify them, and nondisclosure agreements prohibit the vendors from identifying themselves, but an often-repeated rumor indicates that the companies are Mitsubishi, Motorola, NEC, Samsung, and Toshiba."
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