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ODROID-XU4 uses Samsung Exynos5422 (8-core big.LITTLE) for ~80 USD - http://ameridroid.com/products/odroid-xu4

I'm happy with mine.

Ridiculous core counts typically find workloads that saturate the memory controller or I/O, which is why so few are made. They typically bring with them a non-uniform memory space, cache-incoherent/rings, etc. All of that makes software teams groan and decide to spend a few thousand USD on a multi-socket Xeon or a GPU.




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