Quote from: hs4 on March 10, 2022, 08:11:13Cinebench is just one workload. Workloads have different characteristics. Geekbench is a suite of workloads. It might not have the reputation of SPECint, but it's similar in nature. If you want to interpret the numbers, you have to look at individual benchmarks and understand their characteristics. Then you know which benchmarks matter for your workload. E.g. M1 Ultra posted roughly twice as high score as 3990X running Linux in AES encryption while 3990X posted four times as good a score in text compression. And so on and so forth.
This is a matter of the type of benchmark: Geekbench is a synthetic index that is sometimes used to evaluate smartphones, and while it is consumer-oriented, it is not suitable for evaluating workstations.
Quote from: DS2 on March 09, 2022, 12:15:07Just to add, in the real world, the number of cores matters because of the scalability of a workload. Many real workloads have scalability issues and you run into a wall (adding more cores doesn't help or even degrades performance). So, the unspoken assumption was that the workload scales ideally. Then it's down to efficiency.
Just look at the MT score of the 12900k compared to the threadripper to see that something is really really wrong lol
Quote from: DS2 on March 09, 2022, 12:15:07It's Windows. 3990X consistently underperforms on Windows compared to Linux. Also, do realize that the difference is largely down to efficiency. You have to keep in mind the power. It takes power to perform calculations. If you have two processors that both take the same 200 W and one outperforms the other, it's because it's more efficient. The 12900K has a huge power budget given the relatively low core count and therefore can give a lot more power to each core compared to the 3990X. When you add cores, you also want to add power. Otherwise, you're just relying on higher efficiency resulting from lower operating frequencies because you don't have enough power to maintain the higher frequencies. Fortunately, Zen cores don't scale that well so you're not losing that much but you also don't gain that much by giving it more juice. Good for efficiency, not awesome for all-out performance.
Just look at the MT score of the 12900k compared to the threadripper to see that something is really really wrong lol