The first EPYC has a sad situation with frequencies: when it was developed, 180 W was considered too large for the server market, and due to engineering features, all the cores of the first EPYC could not be accelerated simultaneously in principle. The maximum frequency of 2998 MHz appears here only when loading 4 cores, and when loading 8 cores, it will remain achievable only for 2 of them, and the rest will work at 2543 MHz or lower if the active power saving mode is selected. With 16 active threads, the maximum turbo-boost frequency will only be available on 1 core, and with 32 loaded cores, they will all line up at 2543 MHz and there will be no acceleration. Increasing the heat package for these processors in the BIOS-e of our motherboard is not, and installing the SOHO will not help: it’s not the temperature, but the processor itself. It is now possible to put a 250-Watt processor in a 1U case, giving a third of the useful volume for the cooling system, and three years ago it was extremely unfashionable and even vulgar.
The beauty of the Threadripper 2990x is its frequency and absolute limitlessness in power consumption from the outlet: the base frequency value is 3000 MHz with an increase to 4200 MHz in turbo mode. It was made for computers that cost as much as a 3-year-old foreign car, and then the buyer HEDT will choose either a top-end 360-mm liquid cooling system with RGB lighting, or a massive Noctua air cooler, or collect a customized dropsy, adding another thousand $to the price tag. How you divert heat is not just your concern, it is part of your hobby, your lifestyle and your interests that you share on forums, and AMD only gives you a devourer of any software code so that you can use it correctly, even if you have to disable half of the cores in the BIOS to get to the maximum frequency. You may ask, why do this? The fact is that the top frequency of 4174 MHz can be reached when loading only 2 cores, already at 8 their frequency will be 3800 MHz. Loaded to a maximum of 16 cores operate at a frequency of 3600-3700 MHz each, and 32 cores together withstand the frequency of 3394 MHz. Some enthusiasts have found that disabling half of the cores in Threadripper 2990x helps It consistently maintain maximum frequencies and show better performance in games.
Maximum number of cores running simultaneously at the maximum frequency
Frequency of each core when loading in 32 threads, MHz
The recently announced EPYC 7532 is an attempt to get maximum performance on 32 cores. In fact, it is a variant of the 64-core EPYC 76x2 with 32 cores blocked, whose third-level cache was distributed among the remaining cores in service and amounted to 256 MB per processor (8 MB per core). To pay for the increase, you have to inflate the power consumption: up to 200 watts. I want to immediately note that AMD has an EPYC 7542 processor, which also has 32 cores and similar frequencies: 2.35-3.35 GHz, but a strikingly smaller TDP - only 155 watts. This variation in power consumption is explained by the hardware configuration: 4 8-core chiplets in the EPYC 7542 and 8 4-core chiplets in the EPYC 7532. To pay for the increase, you have to inflate the power consumption: up to 200 watts. I want to immediately note that a step higher is the higher-frequency 7542 with a base frequency of 2.9 GHz, which consumes 225 Watts.
Below, AMD has an EPYC 7542 processor, which also has 32 cores and similar frequencies: 2.35-3.35 GHz, but a strikingly smaller TDP - only 155 watts. This variation in power consumption is explained by the hardware configuration: 4 8-core chiplets in the EPYC 7542 and 8 4-core chiplets in the EPYC 7532. Interestingly, in the EPYC lines, there are no restrictions on the number of threads, the use of AVX/AVX2 instructions: the frequencies of all 32 cores independently jump from 1496 to 3296 MHz, and this is the best turbo Boost operation plan that could be desired. In General, this is true for the entire series of modern EPYC Rome 7xx2-the entire turbo frequency scheme in these processors is redesigned, and the entire new line can keep frequencies above 3000 MHz for all cores.