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Noctua NH-U14S TR4-SP3 Single-tower, Single- and Dual-fan Air Cooler. Conventional (horizontal) mounting orientation, bottom-to-top airflow direction, exhausting towards the roof. IceGiant ProSiphon Elite Dual-Fan Thermosiphon Cooler. Roof mounting position, bottom-to-top airflow direction, exhausting towards the roof. Corsair iCUE H115i RGB XT 280mm AIO Liquid Cooler. Conventional (horizontal) mounting orientation, front-to-back airflow direction, exhausting towards the rear fan. #Overdrive cpu stress test pro
be quiet! Dark Rock Pro TR4 Dual-tower Air Cooler. #Overdrive cpu stress test windows 10
Operating System: Windows 10 Pro 64-bit. Power Supply: Seasonic Prime TX-1000 80Plus Titanium 1000W. CPU Cooler: Varies – all 100% Fan Speed. Chassis: Fractal Design Meshify S2 (3x 140mm stock fans at 1000 RPM maximum speed – 2x front intake, 1x rear exhaust). Graphics Card: EVGA GTX 1080 Ti SC2 iCX (mounted in a lower slot to minimise influence on CPU cooling). Motherboard: MSI Creator TRX40 (static 4200-4400 RPM chipset fan speed to minimise influence on CPU cooling). #Overdrive cpu stress test manual
Processor: AMD Ryzen Threadripper 3990X – PBO and Manual Overclock settings. We use two appropriately positioned thermometers (one of which provides two readings) in order to mitigate mistakes from incorrect ambient readings. Our ambient temperature is 23☌ and typically varies by no more than 1☌ above or below that level. 
Instead, we are loading the CPU consistently, without interruption, for the entire 30-minute test period. There is no drop in CPU usage when a frame is rendered, or a specific test is completed in AIDA64. With that said, one clear benefit of this AIDA64 workload versus the Cinebench R20 alternative for our frequency-fixed testing is the consistent loading. We have found that AIDA64 does not seem to be as demanding as Cinebench R20 for the CPU and the system. This provides what we perceive to be enough soak time for the CPU, CPU cooler, and supplementary hardware to reach a reasonable steady-state temperature level in AIDA64. We load all 128 threads using the Stress CPU, Stress FPU, and Stress Cache options for 1800 seconds (30 minutes). Our PBO configuration uses AIDA64 as the stress test. Precision Boost Overdrive Configuration Testing: We have also found that Cinebench R20 is one of the most demanding workloads for modern processors as its AVX-based workloads pushed CPU usage, package power levels (when unrestricted), and wall system power draws higher than many synthetic tests and to similar (or slightly higher) levels that we see from Blender. This does, however, highlight how such a workload will perform on our test system with the coolers being compared. One slight downside of this loading approach is the small period of CPU downtime between completion of a render frame and the starting of the next render frame. This provides what we perceive to be enough soak time for the CPU, CPU cooler, and supplementary hardware to reach a reasonable steady-state temperature level in Cinebench R20.
We load all 128 threads and cycle the load for 1800 seconds (30 minutes). Our manual overclocking configuration uses Cinebench R20 as the stress test. Manually Overclocked Configuration Testing: The system is fully built with the side panels on but all fans other than the CPU cooler's are disabled.
Noise testing is done with our sound meter positioned 50cm away from the side panel. We use this data when analysing the results. CPU Package power and system-wide wall power are monitored during testing. We report the consistent, steady-state temperature that we see from the repeated test runs. 
Each cooler is removed, cleaned, and remounted at least one time (typically twice) between the repeated test runs to ensure any one-off mounting irregularities are identified and corrected. We use identical thermal paste on all coolers with a consistent application technique. #Overdrive cpu stress test software
The iCUE software is removed when testing other, non-Corsair CPU coolers.
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Corsair’s iCUE H115i RGB PRO XT AIO cooler is used to force full fan and pump speed using iCUE software for Windows 10. We also test the IceGiant ProSiphon Elite at reduced fan speed for specific comparisons versus Noctua. All CPU coolers are set to 100% fan speed using the CPU_Fan (and EXS3_FAN for dual-fan operation) motherboard header. Our Precision Boost Overdrive settings of note are: 1000A TDC, 1000A EDC, 1000W PPT, +200MHz Frequency Offset. Our manual overclock settings of note are: 3.6GHz CPU frequency (36x multiplier), 1.075V CPU Core Voltage (within the MSI UEFI), Mode 2 Load-Line Calibration.
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