Spent some time trying to improve the supply ventilation. As a first step, I replaced the stock fan with a Noctua NF-A14 PWM, but placed it inside the case. As a result, the distance from the fan to the blank wall of the front panel has increased to about 35 mm. The PCB airflow improved somewhat, but the HDD became hot. Removing the front panel in this case also affected the temperatures, but much less than in the case of a standard fan. Obviously, with this placement, the fan operates in a more comfortable mode, but the result did not seem particularly convincing to me. Didn't dig deep. I returned to a large turntable, but replaced the standard one with a quieter Noctua NF-A20 PWM. I tried to improve the operation of the fan by sealing all the extra holes on the piece of iron to which it is screwed. I did this to prevent back suction of air from the case. The effect is very small, within the measurement error. Evaluated the possibility of using a processor with a package of 95 watts in my system. To do this, in the BIOS, I switched the processor to maximum performance mode with an allowable consumption of 95 watts. Result: when X264 was running, the processor temperature increased from the previous 64 degrees to 77, all the fans switched to the maximum speed mode. Cooling within an all-air system seems to still be possible, although without a margin, but a quiet system is better to build in another case.
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