Linux-Sunxi writes about this:Īllwinner H6 has a quirky PCIe controller that doesn’t map the PCIe address space properly (only 64k accessible at one time) to CPU, and accessing the PCIe config space, I/O space or memory space will need to be wrapped. This slot cannot work out of the box as it has to be considered as broken by design. Some H6 SoC based boards (like Pine H64 Model a, discontinued) are shipped with a PCIe slot. All H6 boards now clocking at the highest possible value OOB.Īdding proper cooling is highly recommended. With the release of Armbian 20.05 “Kagu” new thermal zones have been added making this limitation obsolete and therefore has been removed. etc/default/cpufrequtils and set MAX_SPEED to 1810000.
The H6 CPU frequency has ben soft-capped at 1,48 GHz to avoid thermal throttling too fast. See also generic Allwinner page, CPU frequency ¶
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