PSU's fuse blown while gaming

Nocche93 · Nov 2, 2014

Hi all, I'm new in this forum, just registered because I have a problem that I don't know how to solve even googling.
Well, I was playing Warface for the first time (still in the tutorial, so I didn't play for long time) when my PSU's fuse blew up.
I heard a blow sound, and my house gone dark...
Anyone knows what can cause that?

These are my components:

750w blown PSU, that I did pay about 30€ (low budget...)
CPU: AMD FX 8320 (with stock sink)
RAM: Corsair DDR3 8gb (1 board)
MOBO: Asrock 980DE3/U3S3
GPU: Geforce GTX 650ti
Aerocool GT advance case (with 3 fans)
2 HDD (320 and 500 GB)

Anyway, I have 2 other questions:
-Actually I have a 600w PSU on my PC, that I'm using for posting there, but my MOBO has a 8pin slot for the CPU alimentation, and this PSU has only the 4pin, but my CPU (AMD FX 8320) works at full power (4.0 ghz) even with the 4pin plug, so:
do the 8pin alimentation "over-aliment" my CPU, blowing my PSU?
-My stock sink for the CPU sucks, sometimes it goes at full speed (6k+ rpm) while gaming, even with not so powerful games (like Warface...), so can the fan be the problem?

Thanks.

dottorrent · Nov 2, 2014

Ahem... 750w unit for €30? I would seriously doubt it even had 400 watts. Your PSU has surged your house and possibly taken your components with it. Please, please find a 550w PSU from a reputable brand. Take a look at this tier list for more information -

http://www.tomshardware.co.uk/forum/id-1804779/power-supply-unit-tier-list.html

Nocche93 · Nov 2, 2014

dottorrent :

I'm pretty sure that my PSU has 750w... My components wouldn't run with 400-500w, because of the 560ti (I played Crysis 3 and other games with that graphics without problems).
It costs only 30€ because it's a poor PSU.
My components are safe, I'm posting with the same PC, but with another PSU (600w, I don't know the brand, but I payed it about 50€, and it's actually a good component).
I was thinking about the Aerocool VP-750 PSU, for 60€, but before buying it I have to know if the problem was effectively the PSU or another component. I cannot melt a 60€ PSU.

dottorrent · Nov 2, 2014

Pretty much all Aerocool units are junk. Try and find a PSU made by XFX, Antec, Be Quiet or even EVGA. They are some of the top makes.

ko888 · Nov 2, 2014

A Seasonic G-Series 360 Watt G-360 (SSR-360GP Active PFC F3) would have no problem powering your system configuration.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

Nocche93 · Nov 2, 2014

ko888 :

So my system can run safely at 100% use on a 400/500 watt PSU? Oh...
Anyway, I was normally playing and the CPU fan was noisly rotating at 6k RPM, and my PSU exploded...
What can blow a PSU's fuse like this? I need to know it, because I cannot destroy another PSU possibly because of one of my other components.

Arindel · Nov 2, 2014

Bad quality PSU can do that. Better to have a good brand PSU 500W instead of a crappy PSU of 1000W.

Also, a good quality PSU provides stable voltages inside. Yours probably overvoltaged something making the fans runs really fast and then BOOM. The electronics inside matter a lot more than "just" the wattage mentioned. Like others said, buy a good brand PSU.

capt_taco · Nov 2, 2014

According to this calculator (which I have found pretty good for ballpark power consumption), you can run your system on 337W. With a 360W unit that would be running it pretty close to maximum capacity, so I'd go with at least 400W.

http://www.extreme.outervision.com/PSUEngine

Graphics card manufacturers are notorious for overstating the size power supply you need with their card. It's a cover-your-ass thing. If some guy has 10 hard drives and an overclocked CPU and a mini fridge hooked up to his computer, they don't want his power supply to blow out and start a fire, then he comes back and sues them because the video card was the last thing he added and he didn't have any warning. Generally, you can take what the manufacturer recommends and cut it by 40%, and then you're in the neighborhood of what you actually need.

As for your question about why it blew up in the first place - probably just because it was junk. Off-name brands use cheap components and often aren't put together well, so stressing them even a little bit is liable to turn them into a firecracker. It's cheap Chinese manufacturing at its finest.

Nocche93 · Nov 2, 2014

Ok, thank you all guys, really.
Can you please recommend me a product with good quality and price? I'm a bit ignorant about the brands, and I cannot pay 70/80€ for a PSU, I'm a poor jobless man lol...

ko888 · Nov 2, 2014

Motherboard: Asrock 980DE3/U3S3 ............................... 38 W
CPU: AMD FX 8320 (with stock sink) ............................. 101 W
RAM: Corsair DDR3 8gb (1 board) .................................... 3 W
Video Card: Geforce GTX 650ti ....................................... 99 W
Hard Drives: 2 HDD (320 and 500 GB) ........................... 20 W
Fans: Aerocool GT Advance Edition case (with 3 fans) ... 13 W

Sub-Total: ................................................................... 274 W
Headroom ..................................................................... 50 W

Total: ........................................................................... 324 W

XFX P1-450S-X2B9
Germany: http://de.pcpartpicker.com/part/xfx-power-supply-p1450sx2b9
Spain: http://es.pcpartpicker.com/part/xfx-power-supply-p1450sx2b9
Italy: http://it.pcpartpicker.com/part/xfx-power-supply-p1450sx2b9

Nocche93 · Nov 2, 2014

Ok I'll look for that one, the price is good and I think the product too.
Thank you again.

ko888 · Nov 2, 2014

Nocche93 :

All of XFX's power supplies are made by Seasonic. You'd be getting a top quality unit.

Nocche93 · Nov 19, 2014

If anyone has the same problem, I want to post an interesting thing that I found Googling a bit:
A decent video card (like my 560ti) requires AT LEAST 30A on the 12V rail, and the power supply I was using has only 16A.
Some PSUs have some more protection and make the PC to shutdown, others (like this one) simply explode.
Seems that the cheap PSUs can support only cheap video cards...
Thanks again for your help.

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