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New custom PC no power. Help !

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  • Computers
  • Systems
  • PC gaming
Last response: in Systems
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October 7, 2014 3:46:24 PM

Fairly new to PC building have made a few, they all worked fine in the past. Made a PC for light gaming (SC2 and older games etc).

I put everything together the way I normally do (although this is my first time using a micro ATX mobo, is there something different to do here because of this ?) and for some reason I can't even get the computer to power up.

No fans spin ,no lights come on no noise what so ever. I don't think there could be a PSU fault as it is brand new and I only opened it today (same goes for the other parts).I don't think a faulty kettle lead is the problem because when I put it in it makes a kind of electrical sound (probably should have turned the socket off first :/ ). would the fact the cpu power conector has 8 pins and I have only 4 or 6 pin connectors available matter (I have read it would not). I have tried bothe the 6 and the 4 pin just to see if it made a difference.

What do you think could be the issue ?

Parts:

PSU: http://www.ebay.co.uk/itm/Tesla-Black-750W-PC-power-Sup...

Mobo+CPU:http://www.ebay.co.uk/itm/181472400938

Ram(only1):http://www.ebay.co.uk/itm/Kingston-HyperX-FURY-Blue-4GB...

HDD: 3x 500gb seagate 7200rpm


tl;dr: All the parts are brand new(listed above) but I cant figure out how make my PC power up (no power at all). Please help.

Thanks in advance.

-Dalton

P.S The PSU is a bit overkill in how much power is needed but this is on purpose because I plan to upgrade in a few month (If i can get it working).

More about : custom power

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October 7, 2014 3:52:27 PM

Bad choice on power supply. It probably doens't even power up to 750W. Maybe 444W on the 12V rails.
You should consider getting a better quality psu so you don't risk breaking your pc.
Stick to Tier 1 and 2 of this list:
http://www.tomshardware.co.uk/answers/id-1804779/power-...

You don't want to skimp on power supplies.

Follow this guide:

"No POST", "system won't boot", and "no video output" troubleshooting checklist
"No POST", "system won't boot", and "no video output" troubleshooting checklist This checklist is a compilation of troubleshooting ideas from many forum members. It's very important to actually perform every step in the checklist if you want to... See full content
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October 7, 2014 3:58:33 PM

That Tesla PSU is bullshit. It's actual output is closer to 400-450W. Modern computers don't use the 3.3 and 5V rails as they used to. 32A on 3.3 and 38A on 5V is all wasted power. Modern computers use primarily the 12V rail - which here is 37A.

As far as the 8 pin connector going to the motherboard goes - some older Intel boards could run with 4 pin instead of 8 pin, if you were having lower end CPU and good enough PSU. But the problem with you is that you have an APU, which consumes 100+ watts. You definitely need a way to power it somehow, and plugging 4 pins ain't going to cut it. All modern PSUs have a 8 pin connector for the extra CPU power. The fact that you don't have one on your PSU should tell you enough. It is a PSU from the Pentium 4 era - design from 2000.

Return that PSU if you can, and get a good solid 500W unit. Seasonic, Corsair (NOT CX or VS), Be Quiet!, XFX are all good choices. There are many other good options, but those were the ones on the tip of my head.
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October 8, 2014 7:54:36 AM

Thanks for the help guys. I will defiantly buy a better quality PSU and have learned my lesson not to skimp on this part next time around :/  But what I would like to know is ,is there a good enough PSU I can buy for now for £35 or less because my budget is kinda tight atm. Also if there is no decent qulity PSU I can get for that price would buying a 4 pin to 8 pin converter do anything or would it make no difference since the amount of power going through the wire is the same ?

Cheers guys.
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October 8, 2014 9:19:42 AM

DaltonG said:
Thanks for the help guys. I will defiantly buy a better quality PSU and have learned my lesson not to skimp on this part next time around :/  But what I would like to know is ,is there a good enough PSU I can buy for now for £35 or less because my budget is kinda tight atm. Also if there is no decent qulity PSU I can get for that price would buying a 4 pin to 8 pin converter do anything or would it make no difference since the amount of power going through the wire is the same ?

Cheers guys.


There nothing good at £35. You get what you pay for at that price a rubbish power supply. If the quality of the internal unit is rubbish, no matter what cable and connectors yo got, it is more or less the same.
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October 8, 2014 3:30:31 PM

OK I get the point , buy cheap and buy twice (or in this case thrice) the XFX PRO550W is at a reasonable price and looks to be of a good quality I will consider getting it (or maybe a Corsair one I have seen). I am just a little clueless when it comes to power supplys and reliability, but hey live and learn :)  Thanks to everyone who commented this is definitely a very helpful and supportive community.
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October 8, 2014 3:39:05 PM

If you buy Corsair - avoid CX and VS at all costs. Even though they are Corsair, they use cheap capacitors and fail prematurely.
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