The 5775C gives up a lot in clock speed (and power consumption) to the 6700K, and with that advantage, the Skylake part often wins. Not visible: a cache that's almost too big for human comprehension. In CPU-bound games such as Project Cars and Civilization: Beyond Earth, the older chip managed to pull ahead of its newer successor. The Skylake processor has a higher clock speed, it has a higher power budget, and its improved core means that it executes more instructions per cycle, but that enormous L4 cache meant that the Broadwell could offset its disadvantages and then some. Tech Report's review of the first Skylake processors included scores from the 5775C, and in games the performance was remarkable. Skylake shakes up the design somewhat, changing the topology and allowing the eDRAM to cache even more stuff, but the effect is still the same: a monstrously large cache for a mainstream commodity processor.Īnd if Broadwell is anything to go by, that cache does real work. For Broadwell, it functions as a large, high bandwidth level 4 cache (the other 3 levels being part of the processor chip itself). The RAM is primarily there to accelerate graphics operations, but Intel's design means that it is not dedicated to this task. Crack open the processor and it has not one big chip in its package but two, with the eDRAM nestled alongside the processor itself. The other is rather more exotic: the chip has Iris Pro graphics, and with it, 128MB of eDRAM. One is mundane: the processor is socketed rather than soldered, meaning that enthusiasts can use it in self-built systems, pairing it with the precise range of components that they want. What made this part so special? It paired two features. But amid all that Broadwell mess was a truly monstrous chip: an almost mythical beast, the Core i7 5775C. The announced Skylake lineup is more complete, and it shouldn't take so long to come to market, so that's an improvement. The Broadwell generation's rollout was slow and messy, with Intel apparently struggling to get its 14nm manufacturing process as refined and as reliable as it wanted. Most of the fifth-generation Core processors have successors, at least approximately. Intel's range of sixth-generation Core processors, codenamed Skylake, is now public.
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