What method is most effective for verifying 3900x stability?
What method is most effective for verifying 3900x stability?
What version of Prime 95 should I use? Choose Prime 95 ver. 29.4 or confirm AVX usage if available. AVX in P95 can significantly impact performance, making the CPU less effective beyond a certain point. It’s not a true indicator of real-world instruction execution.
Use a custom setting, adjust the FFT size to 128k minimum and maximum, and enable in-place execution. After reviewing, it seems running AVX is beneficial. Given your ability to manage throttling, upgrading to P95 v 29.8b6 or later would be ideal. Set FFTs to a size of 20K or less, run in-place, and ensure all AVX options are activated. This configuration represents the highest demand scenario, suitable for extreme environments like enclosed spaces where dust buildup is likely.
YES I am well aware video DOES use AVX instructions for encoding...but not nearly in the same tightly nested loops, incredibly well optimized to always stay within the closest local processor cache as Prime95 has done it. P95 is just unreal about how it does that, but it's a good way to de-rate a system for extreme use
Prime 95 isn't the most demanding load, some video encoding tasks really stress the CPU. It's just amusing to see people achieving lower temperatures with four additional cores and identical clock speeds, while cooling and voltage remain unchanged. Those who claim they're fine at 4.4GHz with 12 cores often find others reaching 83°C and all cores at 4GHz. Keep in mind how much a genuine heavy workload can impact CPU temperatures. x264, x265, and VTM are suitable video encoders. They benefit from AVX2 or AVX-512 support to enhance encoding speed. Blender's render engine also leverages AVX2. Source indicates that a 280 AIO struggles to maintain stable overclocking at 4.25GHz in AIDA64, with temperatures reaching 80°C during Cinebench tests.
I'm confident some encoding tasks can really strain the system... but test that P95 custom configuration with AVX boxes enabled to check if it's not overloading your CPU. The issue remains consistently intense, never reducing when scenes shift or at the end of an encoding session, which lets the whole processor cool down and the cooling layers release heat as it repeats (provided you have a script for that). P95 processes one thread per FFT completion, while the rest of the CPU continues generating significant heat, making it seem overly demanding.