MediaTek said MediaTek made the CPU: https://www.mediatek.com/press-room/mediatek-collaborates-with-nvidia-on-rtx-spark-to-power-the-next-wave-of-windows-pc-exp

MediaTek said MediaTek made the CPU: https://www.mediatek.com/press-room/mediatek-collaborates-with-nvidia-on-rtx-spark-to-power-the-next-wave-of-windows-pc-experiences https://www.mediatek.com/press-room/mediatek-collaborates-wi... Well, MediaTek actually said they made most of the SoC in fact. But the actual CPU cores themselves are all but certainly off-the-shelf Cortex parts, since MediaTek doesn't have a custom core design at all afaik.