Intel's high-end desktop (HEDT), usually reserved for workstation and enterprise applications, is due for an update, and the company is readying an entire family of updated products. Today, we found a leak of what appears to be an Intel Sapphire Rapids design made for desktops. Called Xeon W5-3433, the CPU appears in the SiSoftware Sandra benchmark database. It carries a configuration of 16 cores and 32 threads and is equipped with 32 MB of L2 cache and 45 MB of L3 cache. Having 2 MB of L2 cache per core suggests that the design is not an Alder Lake variation. This specific SKU is clocked at 1.99 GHz, meaning an early engineering sample.

The Sapphire Rapids HEDT platform is codenamed FishHawk Falls. Intel is supposed to offer Alder Lake-X processors with higher core counts and the FishHawk Falls. Both will be running on the same W790 chipset; however, the Sapphire Rapids implementation will carry more cores in a Xeon package designed for professionals. There was an Ice Lake-X Xeon processor called Xeon W-3335 with 16 cores and 32 threads, meaning that the leaked Xeon W5-3433 is its direct successor.

Enthused with its IPC leadership, Intel is possibly planning a return to the high-end desktop (HEDT) market segment, with the "Alder Lake-X" line of processors, according to a Tom's Hardware report citing a curious-looking addition to an AIDA64 beta change-log. The exact nature of "Alder Lake-X" (ADL-X) still remains a mystery—one theory holds that ADL-X could be a consumer variant of the "Sapphire Rapids" microarchitecture, much like how the 10th Gen Core "Cascade Lake-X" was to "Cascade Lake," a server processor microarchitecture. Given that Intel is calling it "Alder Lake-X" and not "Sapphire Rapids-X," it could even be a whole new client-specific silicon. What's the difference between the two? It's all in the cores.

While both "Alder Lake" and "Sapphire Rapids" come with "Golden Cove" performance cores (P-cores), they use variants of it. Alder Lake has the client-specific variant with 1.25 MB L2 cache, a lighter client-relevant ISA, and other optimizations that enable it to run at higher clock speeds. Sapphire Rapids, on the other hand, will use a server-specific variant of "Golden Cove" that's optimized for the Mesh interconnect, has 2 MB of L2 cache, a server/HPC-relevant ISA, and a propensity to run at lower clock speeds, to support the silicon's overall TDP and high CPU core-count.