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#1
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silence?
I have a constant loud hum from my PC. I had to try out my PSU on a mates
computer and with his O/B graphics there little or no sound. I thought it must be graphics card as the Mobo is passively cooled and the CPU has an Arctic Cooler Freezer 64 Pro. i duly went and bought an S2 Accellero passive cooler and fitted it but the sound is just as loud as before. Why is this so? My vga card is an ATI x850XT PE (now passively cooled) and is this drawing enough power from the PSU to create this loud hum. TIA Robin |
#2
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silence?
You do not give specs for your PSU, this may be helpful in trying to
diagnose the problem. |
#3
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silence?
Robin Gordon wrote:
I have a constant loud hum from my PC. I had to try out my PSU on a mates computer and with his O/B graphics there little or no sound. I thought it must be graphics card as the Mobo is passively cooled and the CPU has an Arctic Cooler Freezer 64 Pro. i duly went and bought an S2 Accellero passive cooler and fitted it but the sound is just as loud as before. Why is this so? My vga card is an ATI x850XT PE (now passively cooled) and is this drawing enough power from the PSU to create this loud hum. TIA Robin A loud hum can be resonance. For example, if the side panel on my computer is not completely seated, the side starts to rattle a bit. If you take the side off the computer case, you can try listening to the fans while the computer is running. Carefully sticking a finger on the hub of each fan, and applying just a little friction, should cause that fan to change speed a bit. See if the irritating sound stops or changes pitch when you press on a fan hub. Hard drives can hum. For example, a 3600 RPM hard drive, rotates 60 times per second, so could make a dandy 60Hz humming sound. A 7200RPM drive turns 120 times per second, which could also give you a low hum. And if there is a 60Hz hum from an AC powered device somewhere else in the room, you can get a beat note, between a disk drive hum and the electrical hum. My personal preference, is for a heavy computer case, like one with a steel frame. If there is good weight, and rubber feet on the bottom of the computer, that may help damp some of the resonances. The frame construction technique used also makes a difference. Some computer cases are stiffer than others. Your power supply can make a noise as well. There is a thing called "coil noise", and if the electrical load on the power supply makes abrupt changes, that causes the coil to expand and contract. The coil works almost like a small speaker. Some power supplies have material applied to the coils, to try to damp that effect, but it isn't always successful. So even stuff that doesn't rotate inside the computer, can still make a sound. Paul |
#4
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silence?
hi
an other great way of tracking noise is to get 1m plastic hose and one earplug. point or move one end of the hose around and listen to that area!! i use selfadhensive bitumen carpets (from car industry) in all my pc's. i simply dress the inside of the case (all surfaces that can have it applied) yes the computer becomes much heavier... mount hdd's in suspension trays/strops ex. http://www.komplett.se/img/p/400/311510.jpg coco Robin Gordon skrev: I have a constant loud hum from my PC. I had to try out my PSU on a mates computer and with his O/B graphics there little or no sound. I thought it must be graphics card as the Mobo is passively cooled and the CPU has an Arctic Cooler Freezer 64 Pro. i duly went and bought an S2 Accellero passive cooler and fitted it but the sound is just as loud as before. Why is this so? My vga card is an ATI x850XT PE (now passively cooled) and is this drawing enough power from the PSU to create this loud hum. TIA Robin |
#5
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silence?
It's a generic 600W which I thought was pretty poor til it powered my mates
PC silently. I took out the X850 and tried a mates new 8600GT and the sound was a lot better. I have the x850 back in but am seriously considering a new card and maybe PSU. Robin |
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