Since Comet Lake, RAM latency has grown steadily on Intel CPUs, due initially to the physically longer ring that had to connect Coffee Lake’s now 10 CPU cores instead of the previous 8.
![note 4 versus note 7 linpack benchmark note 4 versus note 7 linpack benchmark](https://versus-dot-com.imgix.net/imgixback.jpeg)
Alder Lake’s disadvantage in latency is once again confirmed here, although Comet Lake is actually still the nimblest here when it comes to transferring a small amount of data quickly between RAM and CPU. We will continue with latency, this time in the familiar AIDA64 Cache & Memory Benchmark. So the 11900K will probably remain the first choice at least for this clientele for the time being.
Note 4 versus note 7 linpack benchmark manual#
But even with a lot of manual tuning, extreme overclockers will have a very hard time making up the nearly 8% disadvantage in compute time to Rocket Lake. We could already verify up to DDR4-4200 CL16 as stable. Now to be fair, Alder Lake in Gear 1 now supports higher clock speeds. 26 seconds slower is the 12900K than its predecessor, with identical RAM. However, the fact that there is supposed to have been another performance leap in the cores from Rocket Lake to Alder Lake is apparently overshadowed by another factor here – keyword: latency. Even though this benchmark performs better with Hyperthreading off, we left it on for consistency accross all our tests.Īs expected, the Rocket Lake CPU is ahead of the Comet Lake CPU, due to its larger and more powerful cores. Moreover, what matters here is not the throughput, but the latency of the RAM.
![note 4 versus note 7 linpack benchmark note 4 versus note 7 linpack benchmark](https://images.anandtech.com/graphs/graph8613/68373.png)
The decisive factors here are the performance of a single CPU thread together with cache and RAM.
![note 4 versus note 7 linpack benchmark note 4 versus note 7 linpack benchmark](https://androidcommunity.com/wp-content/uploads/2015/08/VELLAMO.jpg)
The benchmark still takes several minutes with current hardware and the results are still often reproducible to a fraction of a second. In this benchmark, 32 million digits of the number Pi are calculated in 24 repetitions, whereby the smallest changes to CPU and RAM become visible in the result. I would like to start with the well-known competition benchmark SuperPi with the preset “32M”. In order to make the effects of the different RAM and CPU configurations even more visible, I’m going to unleash a few benchmarks on the systems today that are new to me.