#Noctua #CorsairH100X #Ryzen9 I changed the Corsair ML120 premium fans on the Corsair H100X AIO to a couple of Noctua NF-F12 Chromax 1500rpm fans. A few weeks ago, when inside temps stayed right around 70F and outside temps were still cooler, the CPU peaked at around 80-81C under 100% load… Ambient temperature in the house is about 72-80F (22-27C) now that outside temperatures are getting a lot warmer. If 73c on heavy load then it depends. I realize temps are a very loose - but was curious what other folks temp ranges were so I don’t go full OCD on temps. Im a video encoding enthusiast and on my testing benchmark Im getting my Ryzen 3900x at 94C in temperature under 100% cpu load at 3.89GHz in a couple of minutes, Im scare to run it any longer because of this high temp. When gaming it’s about 70C. I’m going to put in a liquid cooling in. 60° C to 70° C : Still running fine, but getting a bit warmer. Power Consumption Power draw readings are accurate to around +/-5W under heavy load … Doing some benchmark with Cinebench R20 . Is there any way to lower it? The same test parameters were used for temperature readings. Idle is between 45C-55C. Enabling PBO doesn’t make much difference in multi-threaded workloads for the 3900X … I just noticed that temps were idling at 70ish and immediately hitting the 95c thermal limit on load. Is this normal or is the CPU preventing higher temperatures? PC Specifications: CPU: Ryzen 9 3900X. Motherboard: MSI MEG X570 ACE ASRock X370 Taichi. My room temperature is about 30C. In POV-Ray, running the 3900X at a flat 4.3GHz at 1.35V gives it a 8.2% performance boost over stock. Under 60° C : You’re running great! So with a bit of research I dial it back all the way down to 1.275v. Which got me looking at voltages and the BIOS had the CPU at 1.45ish for god knows what reason. Temps are 68-72C, never reached 75C. So, as the title says my CPU only reaches 3999Mhz on all cores under full load in Cinebench R20, shouldnt it boost to around 4.2 Ghz? I just built out a new PC and using the stock fan for the 3900x. When i started doing the benchmark, the Voltage drop to 1.3- 1.4 v. The CPU core is at 4.0 ghz on all cores. CPU Cooler: Fractal Design Celsius+ S36 Prisma. Instead, follow this general rule of thumb regarding CPU temperatures under load. When I ran Blender on a large render it was running hot at 92. But, in order to guarantee a proper 100% load on your processor, you’ll want to use a stress-test benchmark tool. If you're gaming and reach that temp, make sure your case has enough airflow as the hot air coming from the GPU and CPU can be trapped inside your case causing all other components including the CPU to go high in temperature. 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