The Core i7-5775C Wrap Up
Performance Summary: The Core i7-5775C offers fairly strong performance, though it can't match higher-clocked--and lower priced--processors like the Core i7-4790K in general compute performance, due to the 5775C's lower clocks. When the Core i7-5775C's eDRAM cache and Iris Pro 6200 series graphics engine are factored into the equation, however, the performance prospects shift dramatically, as evidenced by our PCMark and graphics testing.
The Core i7-5775C is in a strange position. Because it has lower base and turbo clocks than some other Intel processors, it can't quite match their performance in CPU-centric workloads. In situation where the Core i7-5775C's additional cache and GPU resources can be leveraged, however, it has much more potential--the Iris Pro 6200 series graphics engine on this processor is easily Intel's most powerful to date.
There are a couple of other factors to consider, though. First is the Core i7-5775C's price. At over $540 at the moment, the Core i7-5775C is quite expensive. For that money, you could score a Core i7-4790K and a higher-performing discrete GPU. Of course, that setup would use more power and require a larger form factor, but those detterents probably won't matter to the majority of you. Intel's next-generation Skylake platform is also coming down the pipeline and should hit relatively soon. We can't talk about numbers just yet, but Skylake should be a fairly strong part.
Ultimately, the Core i7-5775C is a fast, power friendly processor, that also happens to have Intel's fastest graphics core on board. For most users, its relatively high street price will make it a tough sell, unless they absolutely need fast integrated graphics.