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Skylake Vs Haswell Desktop processors

October 4th, 2015

To make the comparison of the Skylake and Haswell, I made a list of the i7 and i5 series processors in both line ups that had same or similar clock frequencies and number of cores/hyperthreads. We then plan to compare the benchmarks of these processors to see how much is Skylake better just by architectural improvements. So here is the list

Family Processor Cores/Threads Based Clock Turbo Clock Cache
Skylake i7-6700K 4/8 4.0 GHz 4.4 GHz 8 MB
Haswell i7-4790K 4/8 4.0 GHz 4.2 GHz 8 MB
Skylake i7-6700 4/8 3.4 GHz 4.0 GHz 8 MB
Haswell i7-4790 4/8 3.6 GHz 4.0 GHz 8 MB
Skylake i5-6600 4/8 3.3 GHz 3.9 GHz 6 MB
Haswell i5-4670 4/8 3.4 GHz 3.9 GHz 6 MB
Skylake i5-6500 4/8 3.2 GHz 3.6 GHz 6 MB
Haswell i5-4570 4/8 3.2 GHz 3.6 GHz 6 MB
Skylake i5-6400 4/8 2.7 GHz 3.3 GHz 6 MB
Haswell i5-4430 4/8 3.0 GHz 3.2 GHz 6 MB

Skylake i5-6500 vs Haswell i5-4570

While all of the above pairs listed in the table match very closely in terms of base and turbo clock frequency the two that stand out very clearly are the Skylake i5-6500 and the Haswell i5-4700. The have exactly same base clock frequency at 3.2 GHz and turbo clock frequency of 3.6 GHz. The two processors also have the same amount of the Cache memory at 6 GB. They do differ in terms of the memory controller which has been upgraded to DDR4 for the Skylake.

The passmark scores of the Skylake i5-6500 stands at 7122 and that of the Haswell i5-4570 at 7020 giving Skylake an advantage of 1.45%.

The Skylake does make an improvement in terms of the power envelope where the TDP rating has been reduced from 84 Watts to 65 Watts and that is substantial. But as far as the end users are concerned, the 1.45 % improvement in a period of 2 year is something to be disappointed about. It may be time Intel stops yearly upgrade of processors and give itself some more time to bring some real improvement. That will also work better for its own financial by not requiring to upgrade its fab as often.The users benefit by not worrying to upgrade to soon and too often.


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