Qualcomm may be preparing a major cooling upgrade for its next flagship mobile chips, and it could be arriving sooner than expected. A new rumor suggests the company will adopt a copper-based thermal solution known as Heat Pass Block (HPB) for the Snapdragon 8 Elite Gen 6 Pro and Snapdragon 8 Elite Gen 6, potentially launching later this year.
HPB has already been used on Samsung’s Exynos 2600, where it’s credited with improving thermal resistance by around 16 percent. Now, reports circulating in the industry indicate other chipmakers are looking at similar approaches, and Qualcomm is reportedly next in line.
Why would Qualcomm need something like HPB? Smartphone chip performance is climbing rapidly, and so are temperatures. With recent flagship processors pushing extremely high clock speeds, traditional passive cooling inside phones—such as vapor chambers, graphite sheets, and thermal pads—can start to hit their limits. Even with the benefits of an advanced 2nm manufacturing process, the gains from better lithography can only go so far when companies are aiming for aggressive frequencies to beat competitors in benchmarks and real-world performance.
One reason this rumor is getting attention is that Qualcomm has also been rumored to be testing a Snapdragon 8 Elite Gen 6 Pro variant at around 5.00GHz on performance cores. That kind of frequency might be achievable in a lab setting with minimal restrictions, but smartphones are compact, thermally constrained devices. Once the chip is placed inside a thin handset, heat buildup can force the processor to throttle, reducing sustained performance—exactly the problem HPB is designed to address.
So what is Heat Pass Block, and why does it matter? HPB is essentially a copper-based heatsink placed directly on top of the silicon die. Instead of stacking the DRAM directly over the processor (a layout that can trap heat and limit airflow and dissipation), the memory is positioned next to the chip. Copper’s strong heat conductivity can help spread and move heat away more efficiently, reducing hotspots and improving the chip’s ability to maintain higher performance for longer periods.
The latest claim comes from a Weibo tipster known as Fixed-focus digital cameras, who says both the Snapdragon 8 Elite Gen 6 Pro and standard Gen 6 will use HPB. The same source previously stated Qualcomm was targeting at least 5.00GHz in testing for the top-tier model, which lines up with the idea that Qualcomm would need a more advanced thermal design to make these speeds practical in real phones.
The push for better cooling also makes sense when looking at power behavior in current flagship chips. Qualcomm’s latest high-end processor has shown it can outperform Apple’s A19 Pro in Geekbench 6, but it reportedly requires significantly higher power consumption—around 61 percent more—to do it. If Qualcomm continues pursuing this kind of power scaling for the Snapdragon 8 Elite Gen 6 lineup, improved heat management becomes less of an optional upgrade and more of a requirement.
For consumers, the potential benefits are straightforward: better sustained performance, less throttling during long gaming sessions or heavy camera workloads, and potentially cooler device surfaces under stress. If the rumor is accurate and HPB arrives in Snapdragon 8 Elite Gen 6 phones, it could become one of the more important behind-the-scenes changes shaping next-generation Android flagship performance.
