128 p-core Xeons to follow in Q3 while the x86 giant will release its 288 e-core monster early next year
With the launch of its many-cored Xeon 6 processors at Computex on Tuesday, Intel is closer to reclaiming the core-count lead over competitors AMD and Ampere.more hardware threads than the latest chips from either of its main rivals. Unfortunately, that 288-core monster is not the part we're getting now.
The more pressing difference is that these chips lack support for instruction sets we've come to expect from the past several generations of Xeon. Most notably, Sierra Forest lacks support for AVX-512 and Intel's newer advanced matrix extensions used in AI acceleration.As you can see, there are quite a few differences between Intel's e-core and p-core Xeons.
Things do get a bit trickier when looking at gen-on-gen performance. Intel hasn't shipped e-core Xeons before, so comparing against its older parts isn't exactly an apples-to-apples comparison. Obviously, we recommend taking all of these claims with a grain of salt. But the takeaway is clear: Intel is positioning Sierra Forest not only as a cloud and web scale processor, but as a consolidation play for enterprises due to refresh their ageing hardware.
The 6700-series parts are the smaller of the two with support for up to eight memory channels at 6,400MT/sec or 8,000MT/sec when using MCR DIMMS on a p-core Xeon – no MCR DIMM support on Sierra Forest it seems. The chip also boasts 88 lanes of PCIe 5.0 per socket and has a rated thermal design power of 350W.
Intel's 6900-series is physically much larger. We're told that up to two Sierra Forest or three Granite Rapids compute dies will fit on the package, bringing the max core count to 288 and 128 respectively. The larger silicon surface area does come at the cost of higher power consumption, with the platform maxing out at 500W per socket.
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