The 2nd generation Ryzen is extremely power efficient and reports that it can be used 'more than 4 cores of Xeon' for server applications

AMD's second generation "Ryzen 2000" series, popular among self-made PC enthusiasts despite the high-performance many-core CPU, is equipped with AMD SenseMI technology such as XFR 2 to achieve improved performance. A user replaced a server machine equipped with Intel's Xeon with a Ryzen 2000-based machine, it seems that it fell within 85 W even when full loading 8 cores / 16 threads, "Ryzen is also suitable for servers "We report it.

Unexpected benefit with Ryzen - reducing power for home server
http://lists.dragonflybsd.org/pipermail/users/2018-September/357883.html

Matthew Dillon noticed that the motherboard ' ASRock AB 350 M Pro 4 ' used for Ryzen supported ECC memory with BIOS update.

Dillon, who is interested in being able to use the Ryzen machine for server use because it is ECC compliant, has been using Intel Xeon E3-1270 (base clock 3.4 Ghz, 4 cores / 8 threads) I decided to make " Ryzen 7 2700X " (base clock 3.7 GHz, 8 cores / 16 threads) as a server by replacing it with " Zen + " microarchitecture.

In using Ryzen as a server, Dillon first makes Enhanced Frequency Range 2 (XFR 2.0) effective, and raises "Thermal Design Current (TDC) limit" and "Electrical Design Current Limit (EDC) limit" While using "PPT Limit (PPT)" to limit power consumption. Dillon says that setting such as "keeping the CPU clock high by using high clock memory such as DDR 4 3000" is unnecessary on the server machine, so as a result of searching for setting to reduce power consumption while keeping the performance, 8 Even when core / 16 threads are fully loaded, the CPU seems to be able to operate with relatively low power consumption of 85 W.

The PPT setting for each clock number is as follows. Power consumption can be lowered to 85 W with "PPT 50000" setting of "Full load of 1 core at 4.0 GHz, remaining 7 cores at 2.8 GHz". As a result of considering performance and power consumption, it was decided to adopt the 115 W PPT 65000 setting.

Successfully cutting power consumption drastically by keeping the number of CPU clocks low is unique to server applications where memory is responsible for most of the workload. Compared to previous Xeon aircraft, the number of core / threads themselves has doubled and the performance has been upgraded and the power consumption has also been dramatically reduced, Dillon says "Ryzen 2000 series is also used for server applications I think that it is suitable ".