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> In the Gamers Nexus review, they were using a high end 360MM AIO cooler and the CPU Temp shot up to 74C almost immediately during a blender session. FWIW, my
by PragmaticPulp 5y ago
> In the Gamers Nexus review, they were using a high end 360MM AIO cooler and the CPU Temp shot up to 74C almost immediately during a blender session.
FWIW, my water cooled AMD Ryzen also shoots up to very high temperatures immediately when loaded. It can touch 80C like a lightswitch.
Water coolers have a lot of thermal mass in the water and the metal radiator. The CPU can't instantly heat all of this up.
What's actually happening is that the turbo boost is pushing the CPU as far as possible within the thermal limits on a short-term basis, then slowly lowering the boost frequency as the temperature saturates. Power consumption is very non-linear, so each additional MHz of boost is a significant amount of additional power. The boost algorithms are designed to spike high for short bursts at the onset of load because most desktop operations require short bursts of single-threaded performance.
- merb 5y ago> FWIW, my water cooled AMD Ryzen also shoots up to very high temperatures immediately when loaded. It can touch 80C like a lightswitch. you should probably looking at a nocturna dh15, no ryzen (on the market) will get to 80° when loaded, not even in long blender sessions) so you probably have a faulty water cooling or smth.
- PragmaticPulp 5y agoDefinitely not faulty cooling. I have a 3950X on an NH-D15 in the other PC and it does the same thing. Not an amateur when it comes to cooling. The Ryzen temperature spikes are a well-known phenomenon: https://www.google.com/search?q=ryzen+temperature+spikes https://www.google.com/search?q=ryzen+temperature+spikes
- podiki 5y agoNewer Ryzens can get plenty hot, and by design, e.g. https://www.pcgamer.com/amd-views-ryzen-5000-cpu-temperatures-up-to-95c-as-typical-and-by-design/ https://www.pcgamer.com/amd-views-ryzen-5000-cpu-temperature... In my experience with a 5600X and water cooling (nothing crazy, just an off the shelf AIO) sustained full CPU load will be in the 70s, but I've seen it hit 80 or so briefly.
- merb 5y agobtw. i use a nh-dh15 and run the blender test and i only did go to ~65° maybe I was lucky with the silicion tough. but the stock cooler was horrible.
- consp 5y ago> FWIW, my water cooled AMD Ryzen also shoots up to very high temperatures immediately when loaded. It can touch 80C like a lightswitch. It might be interesting to look into a block which covers the chiplets more. Mine does max 55 at normal speeds and PBO max/unlimited power it does about 70C max (and about 220W draw for a 5900X). I have no peaks like you describe. That used to be a bit more with my old water block which had copper on the chiplets but no water channels.