My old PSU fan was being really loud and throttling a lot, so I replaced it with a new blue LED fan, same dimensions and power usage as the old one. When I turn on my computer, the new fan apparently works, but it is a bit louder than the old one was back when it was working properly, and furthermore also throttles up and down slightly, seemingly in time with the LED brightness (the pitch being higher when the LEDs are off). In addition, my CPU fan, which previously had remained fairly quiet while revving up for about 30 seconds right after startup or after going out of standby mode, has now been doing the same revving process randomly every once in a while, and a lot more frequently when I was playing a game. My hard drive case also seems to be very warm, the warmest component that I can feel inside my computer; it was probably this way before as well, but I never felt it when the computer was on before. Anyway, I'm wondering, are any of these effects dangerous? Is there anything I should be doing to try to get better cooling, for example will leaving the side of the computer case open help to keep it cool, given that the PSU fan is sucking air in from the back, or will it cause the computer to get dusty too quickly?
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