Intel 15th Gen Core i7-15700K Spotted: 20 Cores, AVX-512, and Hyper-Threading Missing

Following last week’s leak of Intel’s Arrow Lake-S flagship, a second 15th Gen sample has been spotted, courtesy of InstLatX64. We’re looking at a 20-core CPU, most likely featuring 8P and 12 E-cores. If the details are correct, it’s the successor to the Core i7-14700K, the only notable chip from Intel’s 14th Gen Raptor Lake Refresh. Unsurprisingly, this processor lacks hyper-threading, AVX512, or an alternative to either.

The alleged Core i7-15700K has 20 cores/20 threads with a base clock of 2.3GHz (although this doesn’t mean much). The supposed Core i9-15900K consisted of 24 cores (8P +16E) with a base clock of 3GHz. The lack of AVX512 is disappointing, as AMD already supports the 512-bit instructions on its Ryzen 7000 processors. It is implemented on Zen 4 using a slightly different approach from Intel’s.

AMD uses its 256-bit (256-bit FP units) data path and twice as many registers to execute “most 512-bit ops” over two consecutive cycles. This is more power efficient than 512-bit wide units and doesn’t require substantial architectural changes. Intel plans to integrate AVX512 support into its P and E-cores as part of the AVX10 instruction set. Unfortunately, it doesn’t look like Arrow Lake will get AVX10 or 512-bit instructions.

Here’s everything we know about the 15th Gen Arrow Lake family.