A laptop 8945HX advertises 5.4GHz boost — can AI marathons actually keep desktop pace?

  The 8945HX's 16 cores/32 threads and 5.4GHz boost read desktop-grade on paper, but how long they hold is decided by chassis cooling and the power wall — plugged in and on battery are two different machines. What it digests reliably is short quantized-inference bursts, prompt prefill and embedding; its 64MB of L3 makes interactive small models at batch 1 feel snappier, with AVX-512 underneath as the inference foundation.

  As a portable 16-core inference box it is fine; as a machine that grinds big models for hours daily, throttling will answer for it. Marathon workloads want the money spent on an external GPU or a desktop. Laptop AI is won or lost on how much power the chassis will feed, not the boost number — check thermal reviews before the spec sheet.