Sign in with
Sign up | Sign in
Your question

Pc won't startup

Tags:
  • Homebuilt
  • Graphics Cards
  • Power
  • Systems
Last response: in Systems
Share
January 25, 2013 7:09:22 PM

I built my PC by customizing each part bit by bit starting 3 years ago. I recently got a new Graphics card and PSU. After installing these new parts my motherboards power light isn't coming on, but everthing else starts up when I press the power button. I've checked the cables multiple times and can't see a problem.

My build:
Motherboard - Asus M4A89GTD PRO/USB3
CPU - AMD Phenom II X6 1100T Black Edition
RAM - 2x4gb Corsair Vengeance DDR3
HHD - 3.5 Sata 500gb
Graphics* - XFX Radeon HD 7950 Double Dissipation 3GB
PSU - 780W G7 Power Extreme

*Note the graphics card needs an 8pin and a 6pin even though every I look online says it has 2x6pins.

Thanks

More about : startup

January 25, 2013 7:41:34 PM

I've just went through testing my computer with various parts removed. It starts fine with the Graphics Card not installed. Is this a power shortage or would it be something else?
Related resources
a b U Graphics card
January 25, 2013 7:52:45 PM

MarpoOcknew said:
I've just went through testing my computer with various parts removed. It starts fine with the Graphics Card not installed. Is this a power shortage or would it be something else?


It is difficult to say with an unbranded power supply. 780W is more than enough but does it put out that much? From what I see on the net it seems to be made by HEC. Are you sure both power plugs are installed in the card and it is securely in the slot? Does the card fan power up?
January 25, 2013 8:18:25 PM

jnkweaver said:
It is difficult to say with an unbranded power supply. 780W is more than enough but does it put out that much? From what I see on the net it seems to be made by HEC. Are you sure both power plugs are installed in the card and it is securely in the slot? Does the card fan power up?


This is the PSU I got - http://www.maplin.co.uk/780w-g7-atx-psu-393044

I've just checked the card and it seems to be in as secure as I can get it. The cards fans are both spinning and both power cables are connected.
a b U Graphics card
January 25, 2013 8:36:25 PM

MarpoOcknew said:
The PSU has 2 6pins. I have an adapter on one set of pins to convert it from 6pins to 8pins. Would this have any effect?


I would say either this is the issue or your power supply is not putting out what it claims.

If you want to read a little, look at the first 3 pages of this http://www.tomshardware.com/reviews/power-supply-oem-ma...

If it ends up being the power supply try to stick with a good brand. Seasonic, Corsair, Antec, XFX to name a few.

If you have the ability get one of those power supplies with the right pins.

Of course it could still be the graphics card. If you have a local shop see if they get it to run.

January 25, 2013 9:16:15 PM

jnkweaver said:
I would say either this is the issue or your power supply is not putting out what it claims.

If you want to read a little, look at the first 3 pages of this http://www.tomshardware.com/reviews/power-supply-oem-ma...

If it ends up being the power supply try to stick with a good brand. Seasonic, Corsair, Antec, XFX to name a few.

If you have the ability get one of those power supplies with the right pins.

Of course it could still be the graphics card. If you have a local shop see if they get it to run.


Would it this PSU be enough to work? Don't really want to spend this much on a PSU but if it helps I think I could force myself to.

http://www.maplin.co.uk/650w-xfx-proseries-semi-modular...
a b U Graphics card
January 25, 2013 9:51:21 PM

MarpoOcknew said:
Would it this PSU be enough to work? Don't really want to spend this much on a PSU but if it helps I think I could force myself to.

http://www.maplin.co.uk/650w-xfx-proseries-semi-modular...


XFX is a good company. All their psu are made by SeaSonic. That is a very good choice.

You need a good reliable PSU as it runs everything in the computer.
January 25, 2013 10:25:53 PM

I found a leaflet for XFX PSUs in the box my graphics card came in. It showed that the 650W is on minimum requirements. But maplin also has the 850W XXX version at £100. Should hopefully be able to get refund for this latest PSU as I still have the receipt. Can't afford to keep both and have no reason too either.

Thanks for all your help.
a b U Graphics card
January 25, 2013 10:36:49 PM

Were you ever able to test the VGA card to be sure its not a bad VGA card?
!