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Entire build won't work

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June 11, 2012 7:07:14 PM

Hi everyone. My current build is:

Generic case with one case fan
Biostar A880GU3 Motherboard
AMD Phenom II x4 965 BE w CoolerMaster EVO Hyper TX3 and Arctic Silver 5 Thermal Paste
ATI Radeon HD 5770
WD Caviar Green 2TB HDD
WD Caviar Black 1TB HDD
G.Skill Ripjaws X 4GB 1600mhz x2
Xenta Powerful & Stability System 600w PSU

So, let start this from the top.
Same Generic Case with one case fan
I had the same motherboard
An AMD Phenom II x4 955 BE w Stock Cooler and coolermaster Thermal paste
Kingston HyperX 1600mhz x2
Same Hard Drives
Same Graphics Card
Same PSU

I had this rig working for a week, and unexpectedly, while playing TF2, it shut off. And would power up, but wouldn't POST, and wouldn't display a thing. First thing I did was send the Motherboard back, it was tested and was sent back to me because they couldn't find a problem with it. Next thing i did was buy new RAM, the G.Skill ram shown above. No change, so I bought the Phenom II 965, the new heatsink/fan and the new thermal paste. I fitted it all properly, and no change at all. I've tested the PSU with a multimeter, all the voltages check out.

So at this point, I have no idea what to do.

I thought the new CPU would fix it because I thought the CPU burnt out due to my having the stock cpu cooler's fan set to the 'quiet' pre-set in the BIOS.

What could it be?

It's always just powered up the fans and LEDs and do nothing else when I power it on, no matter what I do. I have a POST speaker, I long for it to make a noise.

More about : entire build work

June 11, 2012 7:15:30 PM

I would be pretty certain that the issue lies with your PSU as its very cheap and nasty, i just hope its only a voltage supply failure and that it hasnt blown and taken some of your components with it, the only way to test is to buy a decent branded PSU and try it, (antec, corsair, xfx, seasonic, silverstone etc etc).
June 11, 2012 7:20:30 PM

But I tested the thing with a multimeter! Why would it just blow out like that and not be detectable?
Related resources
June 11, 2012 7:25:50 PM

Because thats what cheap PSUs do, as there made out of substandard components.

Find out how many AMps your 12v rail supplies then work out what your system draws at peak, i bet its more that your PSU can manage.
June 11, 2012 7:37:57 PM

It supplies 29A, does that sound like too little?
June 11, 2012 7:46:52 PM

Yes as thats barely 350watts


Converting Amps to Watts

The conversion of Amps to Watts at fixed voltage is governed by the equation Watts = Amps x Volts

For example 29 amp x 12 volts = 348watts

PSU calc for your system means you need at least a

Minimum PSU Wattage: - 342 W

Recommended PSU Wattage: 400w

June 11, 2012 8:04:01 PM

No matter what you are going to want to replace the PSU.
The PSU is the one part of a PC I will not skimp on.

The other parts just affect performance. The more money you spend the more performance.

With a low quality PSU you can take out the entire system in one fell swoop. That 29a 12 volt rail is terrible. This is what is called a liar label. They give you 600 watts with many watts on the 3v/5v rails where they are not needed.
June 11, 2012 8:12:21 PM

So.. What are the chances that a component has been taken out along with the PSU?
June 11, 2012 8:13:50 PM

liams123 said:
So.. What are the chances that a component has been taken out along with the PSU?


Good im afraid, you will have to see.
June 11, 2012 8:40:45 PM

Great! Corsair, Seasonic, Antec and PC Power and Cooling all get my recomendations
June 11, 2012 8:42:18 PM

Does Dedicated 12v rail mean that it can have as much amperage as the computer needs to get that advertised 500W? Or what
June 11, 2012 9:27:07 PM

liams123 said:
Does Dedicated 12v rail mean that it can have as much amperage as the computer needs to get that advertised 500W? Or what


Thats exactly what it means.
June 11, 2012 9:28:12 PM

The 500 watts just means that if you add the 12v and 5v/3v rail you get 500 watts.
So your 12v rail has 29 amps or 348 watts. Meaning the other 5v/3v gets the other 150 watts.
You don't need the watts on the 5v... you need them on the 12 v. If your 5v had 50 watts it would be fine.
Dedicated just means you have an individual rail that is isolated from the rest. The PSUs advertised wattage is a result of the addition of the 12v rail and the 5v rail. Some manufacturers use multiple 12v rails to get the total wattage on the 12v side... So you'll have a 15 and a 14 amp rail to get to the 29 amps advertised.

The corsair you linked is a 34 Amp x 12V power supply. So 408 Watts are on the 12v Rail
June 11, 2012 9:30:20 PM

I think hes asking about the single rail corsair unit.
June 11, 2012 9:40:13 PM

Corsair CX500 V2 Power Supply (CMPSU-500CXV2)
Voltage +3.3V +5V +12V -12V +5Vsb
Max. Current 25A 20A 34A 0.8A 3A
Max Combined Wattage 130W 408W 9.6W 15W
500 Watts @ 30°C ambient temperature

So here you see the 12v rail has 408 watts the combined 3.3v/5v rail has 130 watts the -12v rail has 9.6 watts and the 5vsb rail has 15 watts...
Add them up and you get over 570 watts... This is why Corsair rules... you pay for a 500 watt PSU and get what other less honest manufacturers would call a 600 watt PSU...
June 11, 2012 9:40:53 PM

So is that power supply I linked good enough for my rig?
June 11, 2012 9:42:44 PM

I'm literally about to buy it.
June 11, 2012 9:45:21 PM

Uther39 said:
I think hes asking about the single rail corsair unit.


It has a single dedicated rail but that rail is 34 amp x 12v rail = 408 watts

June 11, 2012 9:47:11 PM

liams123 said:
I'm literally about to buy it.



Buy it, it will be plenty for your machine.
June 11, 2012 9:48:23 PM

liams123 said:
I'm literally about to buy it.


You should be fine. The CX 500 do the trick.

I always go a bit overboard on the PSU. If it were my rig I'd upgrade to the Corsair CX 600.

My rig in my siggy could get by with the CX 500. But I have a 850 HX... So yes... I tend to go overboard...
June 11, 2012 9:49:18 PM

pacioli said:
You should be fine. The CX 500 do the trick.

I always go a bit overboard on the PSU. If it were my rig I'd upgrade to the Corsair CX 600.


Me too.
June 11, 2012 9:50:04 PM

Can i use this same thread if the PSU I receive doesn't fix everything?
June 11, 2012 9:51:53 PM

It's more of a budget thing, I can't really spend that £10 more sadly. Also, how much could I sell on ebay an AMD Phenom II x4 955 BE used? I can't get a refund because it was given to me. And If it hasn't been fried I'd want to recoop a bit of money.
June 11, 2012 9:57:36 PM

Go for the cx 500 you won't be disappointed...

I'd just start a new thread...
June 11, 2012 9:58:29 PM

Yup, I bought it. That should arrive sometime this week.
June 11, 2012 10:00:32 PM

liams123 said:
Yup, I bought it. That should arrive sometime this week.



Nooooooo, cancel quickly and get the 600w unit from my above link for the same price!
June 11, 2012 10:02:57 PM

It doesn't have free delivery, does it? It's kinda too late now anyway.
June 11, 2012 10:06:57 PM

Also, how much difference would it make to get a refund on the G.Skill RipjawsX 1600mhz 4gb X2 and use the Kingston HyperX 1600mhz 2GB x2?
June 11, 2012 10:11:16 PM

Ah well. Thanks for looking, though. I'll shop around more in the future. Ebuyer does have great customer service and delivery times though.
June 11, 2012 10:12:36 PM

Hey... No worries. Your CX 500 will be fine.
June 11, 2012 10:13:06 PM

G'night everyone, and thanks. I've gotta go get some sleep.
June 11, 2012 10:13:20 PM

So does amazon, last xmas i got a 1100t x6 amd cpu for free off amazon because it was 7 days late getting to me, so they refunded me the cash, but i still got the cpu as it was so late.
June 12, 2012 3:31:05 PM

What i don't understand is why the computer would work with that PSU for an entire week and only then decide to not work. Even when only the essentials are connected to the motherboard, it never comes back on. Did the PSU just lose most of it's use? All fans and LEDs still always come on when they're connected. I don't get it at all.
June 12, 2012 3:32:54 PM

I've connected other components to the computer after the PSU stopped working, would a few seconds of run time kill anything?
June 12, 2012 3:34:42 PM

"Xenta Powerful & Stability System 600w PSU" is the answer.
That is a terrible PSU. It likely fried shortly after you put it on.
!