Qualcomm’s heat secret: samsung’s hpb now poised for widespread adoption

Just a few years ago, the notion of Qualcomm reverse-engineering a Samsung Exynos feature would have been dismissed as outlandish. Yet, here we are, witnessing the ripple effect of a strategic shift that’s fundamentally altering the landscape of smartphone thermal management.

The exynos 2600 breakthrough

Samsung’s belated acknowledgement of the Exynos 2600’s success – largely fueled by the introduction of the Heat Path Block (HPB) – has proven remarkably effective. Initially, the Exynos AP was plagued by overheating issues, earning the unfortunate moniker of ‘hot mess.’ But the addition of a copper heat sink, strategically placed atop the processor, dramatically improved thermal performance, pushing temperatures down by a significant 30%.

The hpb: a design revelation

This wasn’t merely a cosmetic upgrade. By forcing DRAM placement alongside the Exynos 2600, Samsung engineered direct thermal contact with the HPB, facilitating efficient heat conduction. The resulting heat transfer – moving it from the heart of the AP to the base of the heat sink – represents a crucial engineering leap. This innovation, now replicated in the HPB for the Exynos 2700, is poised to reshape how flagship devices handle thermal stress.

Global reach, qualcomm’s countermove

The Exynos 2600 powers devices across Europe, South Korea, India, Africa, the Middle East, and South America – a vast market. In contrast, the Snapdragon 8 Elite Gen 5 dominates North America, China, and Japan. However, Qualcomm is responding with the Snapdragon 8 Elite Gen 5 for Galaxy, ensuring a competitive edge.

Next-gen heat management

Recent reports indicate that Samsung is refining the HPB design, introducing ‘Side-by-Side’ (SbS), which positions the AP and DRAM directly adjacent to the second-generation Heat Path Block. This approach maximizes heat transfer, drawing warmth from both components and channeling it to the HPB. Qualcomm is already leveraging a similar design with the Snapdragon 8 Elite Gen 6, though it’s reportedly less effective than Samsung’s implementation.

Chipset evolution

The Exynos 2700 will utilize Samsung Foundry’s SF2P process node, promising a 12% performance boost and a 25% reduction in energy consumption. Qualcomm’s 8 Elite Gen 6 will also benefit from this enhanced process. Crucially, the chipset will adopt a 2+3+3 cluster configuration, prioritizing performance with a 16MB L2 cache – effectively minimizing latency. Qualcomm is even exploring a ‘binned’ 7-core variant, incorporating a disabled performance core to reduce manufacturing costs and enable wider distribution across sub-flagship models. The 8 Elite Gen 6 Pro will boast LPDDR6 RAM, doubling memory bandwidth, while the standard Gen 6 will utilize LPDDR5X.