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Intel "Skylake" Core i7-6700K CPU (Z170 Chipset and GT530) Review

By: Steven Bassiri | Intel CPUs in CPUs, Chipsets & SoCs | Posted: Aug 5, 2015 12:00 pm
TweakTown Rating: 94%Manufacturer: Intel

Percentage Difference

 

Percentage Difference = [Final-Initial]/Average(Final-Initial)

 

To see how the CPU does in comparison to the other CPUs, I split all the benchmark scores up into four categories; CPU benchmarks, iGPU benchmarks, dGPU benchmarks, and memory benchmarks. Many benchmarks overlap between CPU and memory, but overall, I divided up the results into these four categories and used my best judgment to group them correctly.

 

 

Then I took every 6700K result and subtracted the other CPU result, and then divided by the average of the two. This percentage difference can be thought of as the amount higher (or lower) the 6700K performs compared to a reference baseline in between the two scores. If the 6700K is faster, I get a positive number, and if the 6700K is slower, I get a negative number. I then took the mean of all the results per each of the four categories and displayed those below. I did this three times; once with default speeds, once compared at 4GHz CPU and 2133MHz memory (DDR3 and DDR4) across all CPUs, and the finally compared the 6700K at 4GHz CPU and 2666MHz memory against 4GHz and 2133MHz memory of the other CPUs. I called the final comparison the "adjusted" comparison, and if you look at the final results, they almost line up with what one would expect from IPC increases from generation to generation.

 

intel-skylake-core-i7-6700k-cpu-z170-chipset-gt530-review_66

 

These are the default out of the box results. The 6700K is obviously the winner out of the box, with considerable increases across the board, but with the 5775C leading in the integrated graphics arena.

 

intel-skylake-core-i7-6700k-cpu-z170-chipset-gt530-review_67

 

These are the results clock for clock, but without the memory adjusted to compensate for the difference between DDR3 and DDR4. The default memory speed for DDR4 is 533Mhz higher (2133MHz) than that of DDR3 (1600MHz), and these results don't take that into account, in fact the increased latencies of DDR4 actually can hurt the results of the 6700K since all CPU's have their memory clocked at 2133MHz for the results pictured above.

 

intel-skylake-core-i7-6700k-cpu-z170-chipset-gt530-review_68

 

These are the results clock for clock, but with the memory adjusted to compensate for the difference between DDR3 and DDR4. When I offset the DDR4 speed to even the playing field a little and show off the advantages of faster DDR4 memory, then the gains become much greater, and much more on point with what Intel promised in terms of gains. I believe that these results are a better reflection of the clock for clock performance of the 6700K.

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