Newly Built Computer Pulsing (wont turn on)

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Angolmagyar

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Jul 8, 2014
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http://youtube.com/watch?v=M0DQLPhXk4w
i built a new pc, and this is what happens when i turn it on. everything is in its right place, the specs are
Alpine PSU 750W 120mm red fan - PSU
Asus Z97-K S1150 Intel Z97 DDR3 ATX - Motherboard
Asus GeForce GTX 750 Ti 2GB PCI-E 3.0 HDMI OC - GPU
Corsair 8GB (2 x 4GB) Vengeance Pro Black DDR3 1866MHz CL9 - RAM
Intel Core i5-4690K 3.50GHz 6MB S1150 - CPU
WD 1TB Blue SATA 6GB/s 7200RPM 64MB 3.5" Hard Drive - HDD
Samsung 24x SH-224DB DVD-RW SATA Retail (3 Bezels) - DvD
CoolerMaster SickleFlow 120 Red LED Fan - 120mm, 2000RPM - 2 fans

the gpu, cpu, ram, all the fans, hard drives and dvd drives have been removed and put in again, all the connections are plugged in right, everything should work fine, yet when i turn on the computer it pulses, like the power was interrupted.. 750W should be enough for my specs, shouldn't it? i have reconnected every plug, so thats most likely not the problem, but if it is so, let me know what i should do.

if any1 has any idea what might be the problem, im all ears. thanks?
 
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ksarex

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That PSU is crap... All the other components you got seem to be high quality products. Why did you save on the PSU? NEVER save money when buying the power supply. It seem to me that your unit cant sustain the required amount of amperage and fails. 750W by itself says nothing. What you need is a quality unit like xfx pro 550W or anything from the top tiers of that list http://www.tomshardware.co.uk/faq/id-2185279/power-supply-tier-list.html .
 
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shortstuff_mt

shortstuff_mt

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Apr 1, 2008
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I'm also going to stress the importance of a high quality PSU to power your system. The PSU is the most important component for a stable, long-lasting system. We have a troubleshooting checklist for this type of problem. Perform all the steps in the checklist and let us know how it goes. There's a link to the checklist in my signature.
 
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Angolmagyar

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thank you very much! i was panicking how something more expensive broke :D yea, i wasnt really saving money on it, it just came with the case i wanted, and a friend confirmed that 750W is enough.. never mentioned anything about quality + im a software guy, not hardware :p but yea, thanks for your help, ill find a better PSU, but also just to make sure, what would anyone recommend (wattage wise) for my specs? ). or if you know a good PSU that will properly power my specs.
 
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Angolmagyar

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yes, i have done and checked all these, but it still doesnt work :/



what do you mean fry the rest of my components? have i fried anything? i payed close attention and there was no smoke or smell of anything being burned, and i've smelled electrical burns before, even the smallest burns are easy to smell, but again, nothing, so what have i fried? :O
 
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hang-the-9

hang-the-9

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I did not mean you already damaged something, but if you keep trying to start the system that does not want to start, you could.
 
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Angolmagyar

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Well, turns out it was in fact the motherboard's fault, not the PSU, as after i took a look at the pins and saw every single one of them bent, i sent it for repair, where a pin broke off, so ultimately, i had to buy a new one, as broken / bent pins void the warranty, and it turned out those pins were supposed to be bent, in that exact way.... oh well, 115 euros out the window >.< .. anyway, i installed the new mobo with all the other stuff and it works. purrs like a kitten, except the factory fans on the CPU are shit, so the cores heat up quick and they go as high as 80+ °C while gaming, 70 °C in a good case, so i guess i'll have to get a new CPU fan, but other from that, everything works.
 
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shortstuff_mt

shortstuff_mt

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The CPU cooler must not be installed correctly if it's going up to 80C while gaming. Did you re-install thermal paste when you installed the CPU into the new motherboard? It shouldn't get nearly that high even with the stock cooler. Is there a cutout in the case behind the motherboard so you can ensure all four push-pins are fully seated?
 
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Angolmagyar

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The fan, to my view, is plugged in correctly, and it spins at around 1500 rpm when its below 30 °C and goes up to 2500-3000 when its really high. I'm not an expert in fan speeds, but I believe that 2500 rpm is good. the chassis fans are installed on the motherboard and they run a couple hundred RPM's higher at all times. I did not aply thermal paste, as i have none, but there was some already applied. Or is that just low quality?
 
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hang-the-9

hang-the-9

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Make sure you don't have the case fans on backwards pushing air the wrong way. Also the stock thermal paste on the heasink is often not the best, you should get something better (I like arctic silver), the stock heatsink are pretty good these days as long as you are not oveclocking. The issue is likely not with the heatsink or fan on it, but the contact with the CPU and possibly the overall case cooling.
 
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shortstuff_mt

shortstuff_mt

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After a heat sink has been installed and removed you should clean the paste off the CPU and HSF and re-install fresh paste. When you say there was some already applied do you just mean there was still some paste on the HSF after you removed it? I would order some decent thermal paste. Arctic Silver 5 really isn't a great option any more. There are many better pastes out yet. I'd look for some Arctic MX-4 or GELID Solutions GC-Extreme paste since they are considerably better than Arctic Silver. Better yet, since you have an overclocking CPU and motherboard maybe it's time to pick up an aftermarket CPU cooler even if you aren't planning on overclocking right away. The Cooler Master Hyper 212 EVO is a very popular, inexpensive, CPU cooler that comes with decent thermal compound.
 
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Angolmagyar

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Well, there are 2 fans on the side, sucking air in, no fan on the back, and 1 in the front, that pushes air out. i often clean the fan filters, so it doesnt get dusty, but it could be just that, like i said, im not good with fans, and the 2 on the sides arent supposed to be sucking in? :D the front 1 i cant change, as it only has the big 4 pin connector and i cant flip the polarity on it, or anything :/ i could probably unscrew it and flip it like that, but it came with the case like that, so i assume it's right as it is.
 
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Angolmagyar

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i bought the 212 evo, i installed it on the mobo, i reinstalled the mobo into the case, and only then my thick head realized its too tall... im unable to fit the side panels on now, PLUS on the side panel the cooler faces, there are 2 fans on it too, so that gives it an extra pinch of bulls**t :D no need to state the obvious, if im gonna build a pc, i need to be a lot more careful with these kind of things :) although, i removed the previous thermal paste, and i applied the new that came with the cooler, and now it seems as though that fixed it (mostly) as it doesnt go too high while im gaming, 58 is the highest i've seen with SpeedFan. i dont know what im gonna do with that cooler now, but somehow i feel that i'Ll have to buy a new case... this pc is just sucking money from me like a bi*ch :p
 
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shortstuff_mt

shortstuff_mt

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What case do you have? You really don't need the fans on the side panel, especially with a low power GPU like the GTX 750 Ti. I would remove the fans from the side panel and see if the Hyper 212 EVO fits without the fans installed. If it does then I would either find a new spot in the case for the fans that were on the side panel or just do without them.
 
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Angolmagyar

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I have the EZCOOL K2 RED LED USB 3.0 ATX GAMING TOWER CASE.
and i have tried it without the fans on, and it mostly fits, but there will still be a roughly 2cm gap between the case and the end of the side panel (if you know what i mean). i COULD just use some tape or something and close it, but i really dont want to do that..
 
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Angolmagyar

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Update in 2020: I bought the same motherboard as I had originally bought, reinstalled all the components and to date everything still works. The PSU is still the same so it was definitely not the issue and it has never caused any problems. There must have been some fault with the motherboard, I guess. I'll never know because my dumb ass decided the pins on the CPU socket were bent so I tried straightening them and ended up breaking a few pins off. Voided warranty, so I had to buy it again only for the new mobo to have all the pins bent as well.... they were meant to be like that... anyway, PC works fine today :) same components with a few upgrades since (more HDD + m.2 nvme, plus wifi card plus usb 3.0 PCIe card plus new case with CoolerMaster 212 evo running 2 fans.
 
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