CPU Reviews

Intel Core i7-5775C Review: More Than Meets the Eye

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Clock-for-Clock Comparison vs Haswell @ 4GHz

Stock is one thing but to gauge how well the new generation CPU actually performs over the last in terms of CPU performance, there must be parity, so both processors were overclocked to 4GHz, cache was locked to their default values and the memory was set to the kit’s JEDEC default floor which is 1600MHZ 11-11-11-28-1T.

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AES and CPU Queen performance is very close but the CPU Photoworxx, Zlib and especially CPU hash show noticeable improvements. It is in the FPU benchmarks where the shortcomings of the new Broadwell processors show. The 32-bit floating point performance as well as the 64-bit Mandelbrot test show much lower performance even at 4GHz although performance is slightly faster with the 80-bit and VP8 compression test. The Haswell does have a larger shared L3 cache (8MB vs 6MB in Broadwell) and it helps here.


If the default speeds left doubts as to whether the i7-5775C can out-perform or even keep up with the i7-4770K in rendering, it is erased in these tests. A 9-point lead in single threaded and 44-point lead in Cinebench R15 CPU test is observed and the i7-4770K’s lead at stock was lost when the i7-5775C was set at similar speed.



x264 and x265 encoding shows slight advantage going to the i7-5775C as well over the i7-4770K.

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Compression performance was already spectacular with the default comparison so the advantage of the i7-5775C is even more visible here, especially with the inclusion of single-threaded performance which shows a 700+ lead.


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  1. Wow man what can I say. Excellent review, I am a bit disappointed that the 5775C does not have at least the same frequency of the 4790K, I believe for people that have machine that do not use a graphics card, this might be a better choice because of the Intel graphics. Plus the fact that the 5770C is LGA and not BGA is also a plus. My understanding is that with BGA you have to change out the whole motherboard also. So for people that are using a previous 1150 build to upgrade, this would make the chip not worth the trouble. I would love to see what GPU the new 6200 graphics stack up against. Again Ron, very informative and excellent review.

  2. Thank you very much Alan. Yeah, although looking at it from Intel’s perspective this is a win for them. This move will push more of the enthusiast crowd to the HEDT/Intel Extreme platform while increasing the userbase of the mainstream desktop platform for those that want a capable integrated IGP with a more powerful CPU and those who want a more powerful option than what AMD offers.

  3. people who are going to buy an i7 problably wont be using the integrated graphics and the point of AMDs apus where never to be high end they gave decent gaming performance at 720p this are entirely different consumers they guy that thinking of buying an APU is not going to buy an intel processor

  4. I am sorry for AMD they are 1 or 2 steps behind from Intel it seems
    Someone that wants performance will surely choose this processor over anything that AMD offers right now

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