Intel's new high-end processors for socket 2066 appear in four different series, but the performance is compared to its predecessors not always higher.
If a new processor series comes on the market, it is slightly faster than the models of the previous generation in general. In the case of Intel's new Skylake X-processors for high-end socket 2066 but this is not always the case, compared to the predecessors of Broadwell E series.
In our review of the Core i9 7900X with ten cores, the CPU is the game benchmarks partially reproduced just behind the Core i7 6900K (Broadwell E) and the Core i7 5960X (Haswell E), although these CPUs two cores less and a lower clock speed have under typical game load. In a similar vein, the results in the (gaming) tests of colleagues such as computer base or the PC Games Hardware interpret.
We have described our Intel test setup for the Core i9 7900X and the games in question and the exact results compared with the previous CPUs and asked if they had expected such values and what (minimum) could be lower performance, the.
This grid-like type of connection of components inherit Intel Skylake X processors of the server CPUs with Skylake SP architecture. In general, it helps improve the performance, in some applications, but also slight performance penalty can be observed.
The official response (see below) confirms our initial suspicions: Intel expects that the new mesh structure for connecting the CPU cores with other components such as the memory controller, cache and I / O components one in certain applications can provide slightly lower performance compared to its predecessors.
This grid-shaped kind of compound replaces the previously circular ring solution, which provides for longer distances and higher latencies due to the reduced number of connections especially for processors with high core speed. But if an application does not know about the new mesh structure yet, she seems to be able to slightly negative impact on performance.
In the official statement Intel itself says that only "a handful of applications" is affected. In addition, it stressed that the mesh structure overall is an advance and that Skylake X in most applications offer clear advantages over its predecessors.
Then suggest our own application tests: Here, the Core i9 7900X usually very clear from i7 6900K Core i7 5960X and Core can settle. Here, however, his two extra cores as well as its high clock rates play an important role regardless of the new architecture.
In the statement, incidentally mention is the new cache structure. The general usually larger but slower L3 cache was reduced (almost 14 MB instead of 20 MB). For this, the faster and more available for each individual core available L2 cache is now bigger (1,024 KByte instead of 256 KByte). Even this innovation probably is doing its part to the partly slightly lower performance of Skylake X.
Official statement from Intel to the partially weaker compared with Broadwell E capacity of Skylake X:
"The "net" architecture of Skylake-X family is different from the "ring" architecture of Broadwell E family. As for Skylake-X, we have found in a handful of applications that comparable Broadwell-E processors are slightly faster because of these differences. The development of a new architecture but it requires that you received certain compromises in order to achieve the objective of a general improvement in performance. This also applies to the network architecture of Skylake-X. While these compromises slightly negative influence a handful of applications that Skylake-X processors provide a total thanks to the new architecture an excellent performance per core and significant performance gains in a variety of applications."
Currently, the Core i9 7900X is the flagship for the base 2066 with ten cores, yet but in the summer of 2017 followed by more expensive processors with up to 18 cores.