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Effects of ripple[edit]
Ripple is undesirable in many electronic applications for a variety of reasons:
The ripple frequency and its harmonics are within the audio band and will therefore be audible on equipment such as radio receivers, equipment for playing recordings and professional studio equipment.
The ripple frequency is within television video bandwidth. Analogue TV receivers will exhibit a pattern of moving wavy lines if too much ripple is present.[7]
The presence of ripple can reduce the resolution of electronic test and measurement instruments. On an oscilloscope it will manifest itself as a visible pattern on screen.
Within digital circuits, it reduces the threshold, as does any form of supply rail noise, at which logic circuits give incorrect outputs and data is corrupted.
High-amplitude ripple currents shorten the life of electrolytic capacitors.[8] https://en.wikipedia.org/wiki/Ripple_(electrical)#Frequency-domain_ripple
My System is Following
1. CPU - i7 4790K
2. Mobo - ASUS Z97 PRO
3. GPU - AMD R7 260X Sapphire
4. PSU - Cooler Master G550M
My PC stopped suddenly, i tried the reset button several time but it did not work. So i opened it and tried the paper clip method of the PSU. The Fan Runs. So i thought maybe the GPU is in trouble. So i removed the GPU and it works.
However when i keep the GPU with the power cable removed as far as i understand the bios should start. However the cpu fan starts for a split second and stops.
I am using this setup for around 20 Months, and it was working fine. The parts above are in my opinion good quality. So is it possible that my GPU might have died. I mean it did not show any artifact. I feel that my PSU might not be giving enough power in the PCI express so that the GPU is not running.
My question is how can i check which of the part is the troublemaker, is it the PSU, the GPU or the PCI express slot in the motherboard. And can GPU die suddenly like that?
Then my luck turned worse. Now the PC wont start. I now similar problem to this video no post no boot (You can see from this video ( start at 4 min 23 second) that for one time the boot stops abruptly and then retries in my case it just never starts. No matter how many times i press the power button it starts for 2-3 seconds and then stops abruptly) no beep no error nothing
I have done the following
1. Checked the GPU with another cpu+mobo+psu that PC does not start nor does it beeps or shows any error. It seems that it might be really dead
2. Checked if my PSU can run another PC it runs the other PC perfectly, so i think the PSU is alright
3. Checked if other PSU can run my PC, with GPU nothing happens, without GPU the systems starts then stops abruptly no beep no error q-code
Feeling Very Bad. This PC was very expensive
But my system is behaving very strangely i am not sure what is the problem
Can you explain what you are seeing?
You was suffering low Volt issues on your workplace? Oh dear... now we found out your issue, i´m sorry to hear about or even inform you but this stuff is critical. If your home can´t provide stable power it can indeed damage your PC all of a sudden. The PSU is not always capable to react to this sort of behaviour, some do and some may fail (surely a matter of the price aswell).
I suggest to get a UPS very soon! Sure, as long as your home can provide stable power you are fine without this sort of stuff but in term there are power fluctuations you do need to back up your precious hardware, there is no other way.
Again, sorry to hear but please take care at your hardware in term you face serious power flucutations. You even knew the deal... but still not to worried it seems, i would worry... a PC is a sensitive electronic device, this is not a vacuum-cleaner.
Now i guess your GPU has been busted, and your PSU simply was unable to scope with the critical fluctuations. Maybe a overpowered PSU with big input caps is able to catch those sort of fluctuations, but i still suggest to use a UPS as a back up, do not put it at risk. The current PSU certainly is fine as long as there is proper power at home, but it is not overpowered enough in order to deal with serious fluctuations.
Basically, the PSU is tuned in a way that it can handle between 100 and 240 V without issues, some overpowered pieces may be able to tackle fluctuations between 80 and 260 V even, without stability issues or hardware damage. But certainly, a european 220 V line is less critical because in the US in term it drops to below maybe 80 V, it´s very difficult for any PSU dealing with (it´s simply far outside specs). Do not underestimate a low Volt condition, a low Volt is able to cause ridiculous overcurrent and is not any less worse than a overvolt issue. Of course you can´t compare the Volt of a CPU with the Volt inside a PSU, a CPU got a normalized current, in comparison your PSU will have to scope with high and demanding variables. It will need proper power!
Naturally a Volt will never go up, in term you are using more power than your line is actually able to deal with, the Volt will always drop. Because the resistance (Ohm) will be raised thus heating up your line and anything connected to it. As i said, in a european line when a 220V is dropping, the Volt is still inside range of PSU specs (there is so much bottom for catching it up) but a 100 V line is much more critical in term this issue is happening, so take care. In term PSU is unable to deal with this current, it will hit the PC like a truck, although protection may not always kick in.
I do recommend calling a electrician and make some sort of power line reserved for your hardware only, this can help a big deal. Do no use this line with very nagging devices (vacuum cleaner, driller, oven or whatelse, it can critically affect the power quality of your line), and again, you may use a UPC, very recommended.
The problem with UPC is, it is able to protect you from critical spikes, but by all means, it´s not a device able to permannently "boost" your Volt. In term your line is abused in such a high manner that it is almost permannently undervolted, maybe 80 V, a UPC may not do the trick and simply shut down in this case. So, it seems almost unavoidable trying to fix your line by making a dedicated line, you may need to get this stuff sorted out somehow, else you may not live in peace i assume.
Oh well, at least the issue is now known to us/you.
But it will cost you some bucks, hard to avoid. Guess you get your card as a RMA and your MB seems to have survived. So i guess UPS and ... i really do recommend... fixing your line at home by a electrician is the next steps you may take. Not free but well worth the investment, else the plague will permanently hitting you. Good luck.