Stress test and maximum temperatures
Even though the maximum load of 50-55 watts should hardly be reached in reality, we tested the worst-case scenario despite everything. The maximum temperature in the closed case (Corsair Obsidian 550D with insulation) settled at about 70°C after 8 minutes, the room temperature was 22°C.
Temperature distribution on the radiator
This point is very interesting for the installation, if you want to plan and optimize the airflow. Below, we have listed the values determined in the currently used closed case with an IR thermometer. The card is normally installed horizontally, with the cooler surface facing downwards. The GPU operates with a core temperature of 70°C under load, the room temperature is again 22°C and the case’s internal temperature ranges between 30.3°C (above the bottom power supply) and 36.7°C (below the case’s top), depending on the location.
This constellation also shows the advantage of the bent louvers, since the waste heat can also be dissipated via the upper rear side. The temperature distribution is similar when installed vertically in the HTPC, although the maximum temperatures in the stress test are about 2 Kelvin lower with a comparable case volume.
A note for overclockers
The OC performance increased by at least 10-15% (depending on the application) depending on the tested or self-set limit, but the maximum temperatures still never exceeded the 70°C mark in normal gaming use. This is already a very appealing performance for a passive card, which is currently unparalleled. If you also assume that there are still much more suitable cases in terms of passive airflow, then these already very good results have to be rated even higher.
However, all this requires a considered CPU cooling, because the immediate proximity of the card with the overhanging cooler to the CPU is already critical for small CPU coolers with very low-speed fans (especially in smaller HTPCs with mini-ITX boards). We had already commented on this problem on the second page, and it remains to be weighed up from the Micro-ATX format upwards, which board to use and whether a PCIe x1 slot on top (which should then better remain unused) can perhaps provide a remedy here.
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