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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro 2012 Random “Snap” Sound
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<blockquote data-quote="Nanco" data-source="post: 1824158" data-attributes="member: 50325"><p>I’ve done this now and I fear it might have raised more questions than solutions. That said, my Mac has been good for the past 24 hours and I have only had one instance of the snap which I think is actually coming from the graphics card (possibly the fan?). I noticed when I loaded a game that the fan began to speed up and its almost as if the snap occurred at each stage of the fan speeding up. When it reached a consistent speed, I didn’t hear any further snaps.</p><p></p><p>I’ll be keeping an eye on things over the weekend and will post if I notice this snap coming from anywhere else in the Mac. With what I noticed so far, I can confidently say that I didn’t notice anything visual to accompany the snap like arcing or lights.</p><p></p><p>I do have some further questions about the graphics card/s in my Mac, however I might create a separate thread for that later as not to go too far off topic. I did notice some things about the power supply and the fan (I mentioned the latter in my last post).</p><p></p><p></p><p></p><p></p><p>I have a Mac Pro 2008 model that I use as a backup and for extra storage. I’ve since learned that I can’t simply swap out the power supply from this Mac to my 2012 one, however one thing I noticed was just how quiet the actual power supply was in comparison to the one in my 2012 Mac Pro. Here is a short video to hopefully better explain the sounds coming from the fan and the back of the power supply:</p><p></p><p><a href="https://drive.google.com/file/d/1gkd1JBNtMsjYV0mrXLAsAVM8Sbsihsq0/view?usp=sharing" target="_blank">PSU Fan Hum and PSU Buzz.mp4 - Google Drive</a></p><p></p><p>I swapped the power plug from the 2008 Mac and plugged it into my 2012 Mac (same outlet and same plug with nothing else external plugged into the mac). The 2012 power supply was still quite noisy. I also tried plugging into a surge protector strip and Furman power conditioner, neither of which affected the noise.</p><p></p><p>The higher pitched noise is not as noticeable when the Mac is under my desk, however I’m actually curious if this sound is considered normal or if its the sign of a failing power supply. It doesn’t appear to be interfering with my outboard equipment, so I can only assume this sound is isolated to the Mac and is not caused by anything external (especially considering my other Mac is silent in comparison). I also have no idea how long this noise has been present as it is drowned quite well under the desk and especially with whatever is coming through my speakers drowning it even further.</p><p></p><p>I haven’t experienced any other signs of possible power supply failure, however what do you think? I have not noticed any smells coming from the Mac or around the power supply area (non-smoker, my sense of smell is very good. I can smell food from over a mile away;D), but the low fan hum is definitely noticeable when the side is on and the case is under the desk. Could the fan be on its way out also?</p><p></p><p>In case I do need a new power supply (do they even exist?), I would be interested in where I can get one from or if non-Apple branded power supplies exist (like Newertech or similar). Preferably UK/EU based if possible.</p><p></p><p>Once again, many thanks for all the help so far.</p></blockquote><p></p>
[QUOTE="Nanco, post: 1824158, member: 50325"] I’ve done this now and I fear it might have raised more questions than solutions. That said, my Mac has been good for the past 24 hours and I have only had one instance of the snap which I think is actually coming from the graphics card (possibly the fan?). I noticed when I loaded a game that the fan began to speed up and its almost as if the snap occurred at each stage of the fan speeding up. When it reached a consistent speed, I didn’t hear any further snaps. I’ll be keeping an eye on things over the weekend and will post if I notice this snap coming from anywhere else in the Mac. With what I noticed so far, I can confidently say that I didn’t notice anything visual to accompany the snap like arcing or lights. I do have some further questions about the graphics card/s in my Mac, however I might create a separate thread for that later as not to go too far off topic. I did notice some things about the power supply and the fan (I mentioned the latter in my last post). I have a Mac Pro 2008 model that I use as a backup and for extra storage. I’ve since learned that I can’t simply swap out the power supply from this Mac to my 2012 one, however one thing I noticed was just how quiet the actual power supply was in comparison to the one in my 2012 Mac Pro. Here is a short video to hopefully better explain the sounds coming from the fan and the back of the power supply: [url=https://drive.google.com/file/d/1gkd1JBNtMsjYV0mrXLAsAVM8Sbsihsq0/view?usp=sharing]PSU Fan Hum and PSU Buzz.mp4 - Google Drive[/url] I swapped the power plug from the 2008 Mac and plugged it into my 2012 Mac (same outlet and same plug with nothing else external plugged into the mac). The 2012 power supply was still quite noisy. I also tried plugging into a surge protector strip and Furman power conditioner, neither of which affected the noise. The higher pitched noise is not as noticeable when the Mac is under my desk, however I’m actually curious if this sound is considered normal or if its the sign of a failing power supply. It doesn’t appear to be interfering with my outboard equipment, so I can only assume this sound is isolated to the Mac and is not caused by anything external (especially considering my other Mac is silent in comparison). I also have no idea how long this noise has been present as it is drowned quite well under the desk and especially with whatever is coming through my speakers drowning it even further. I haven’t experienced any other signs of possible power supply failure, however what do you think? I have not noticed any smells coming from the Mac or around the power supply area (non-smoker, my sense of smell is very good. I can smell food from over a mile away;D), but the low fan hum is definitely noticeable when the side is on and the case is under the desk. Could the fan be on its way out also? In case I do need a new power supply (do they even exist?), I would be interested in where I can get one from or if non-Apple branded power supplies exist (like Newertech or similar). Preferably UK/EU based if possible. Once again, many thanks for all the help so far. [/QUOTE]
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Apple Computing Products:
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Mac Pro 2012 Random “Snap” Sound
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