Review on AMD Ryzen 7 3800X Processor: Unlocked 8-Core CPU with Wraith Prism Cooler for Powerful Desktop Performance by Adam Woods ᠌

Raising the memory frequency above 3600 does not make sense, because. in this case, the intraprocessor bus switches to 2:1 mode and starts operating at half the DRAM frequency, which negatively affects the overall performance (memory latency increases, copy speed drops, etc.). The fact that the speed of writing to memory is half that of reading is recognized by AMD and is explained by the peculiarities of the architecture. The same feature is observed in 3600 and 3700, but is absent in 3900 and 3950. AMD claims that pure writing is rare in real applications, which is indirectly confirmed by the memory copy test, in which the speed is close to the read speed. It is quite possible that this is not a drawback, but nevertheless it is difficult to say unequivocally that there are no such bottlenecks in which this architectural feature can adversely affect overall performance. In order for the processor to meet the declared TDP in stress tests, I took the following steps: 1) Replacing the stock cooler with a be quiet! DARK ROCK 4. 2) Replacing the thermal paste from the DARK ROCK kit with Noctua NT-H2. 3) Setting the CPU VCore Voltage to Offset -105mV, as well as changing the VCore Line Load-Line Calibration profile (see screenshot). Result: 1) Performance results (including turbo frequencies) are the same as before changing the BIOS settings. 2) Reduced power consumption from 130W to 101W in Prime95 Small FFT, 3) Temperature during half an hour stress test: Prime95 Small FFT: 79 degrees. Aida64: 74 degrees. 4) The average temperature at light loads is 45 degrees, in idle it sometimes drops below 40. I selected VCore Offset from -75 to 120mV. For my samples, values ​​above -110mV result in performance degradation.