According to the article:

The higher-end CPU packs similar power to the Z1 Extreme found in the ROG Ally, but in a slightly different form factor. You’ll get 12CUs with 768 shaders on the Radeon 780M graphics, backed by either 32GB or 64GB of LPDDR5x memory. Keeping things cool is a “PC-grade large turbofan” as well as “thick dual heat pipes” which increase the thermal efficiency by 50% and have 35% better heat dissipation.