Old PSU works fine but new PSU won't?

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HowieeBoyy

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Nov 26, 2013
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Hello, I have bought myself a 750w PSU so I can use my new GPU (which I have not yet installed cause I am testing the PSU)
My old psu is only 500w

I have installed the psu and installed the 4-pin 24-pin and all the molex connectors to each and every part. The problem is all the fans will turn on and the processor but the computer itself won't boot as the monitors will display "no signal" and I have tried turning caps locks on to see if it worked but nothing had happened.

I'm only 16 and not the biggest computer expert so if there is any way I could get help that would be great!
 
Solution
markwp
That psu is useful only as a doorstop or a boat anchor. Do NOT use that psu with the 770 or with your system. Even though it says it is 750w, in actuality, it is probably closer to 350.

The 770 needs a 600-650w psu, and you need to spend a few pounds to get a good one. If you are using amazon, I would suggest THIS as the minimum starting point.

I know you're young and probably very budget minded, but the psu is absolutely the last thing to save money on when you buy. I know the psu I noted above is 40 pounds more than what you chose, but you absolutely need a quality psu. If the psu dies (and the Alpine will, and quickly), there is a substantial chance that it will also take the motherboard, cpu, gpu and other hardware...
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markwp

markwp

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Jan 22, 2013
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Make sure you have the 24 pin connector firmly seated as well as the 4 (or 8) pin EATX connector near the cpu seated. What did you need molex connectors for? Your drives, etc., should be using sata type power connectors.

Last - what make and model of psu did you buy and what make and model of gpu?

When you post questions asking for help, please include your system specs - i.e. motherboard, cpu, gpu, psu, ram, etc. The more info you provide, the better the answer.

EDIT: Please delete your duplicate post. Be patient when you post - it takes a little time for the post to show up in the forum.

Mark
 
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HowieeBoyy

Honorable
Nov 26, 2013
17
0
10,510
The psu I have bought is this: http://www.amazon.co.uk/Alpine-750W-PSU-120mm-Red/dp/B004ZK317A/ref=sr_1_1?ie=UTF8&qid=1385452159&sr=8-1&keywords=750w+psu+6pin

And my motherboard is: http://www.gigabyte.com/products/product-page.aspx?pid=3833

The molex were to connect to the fans and the HDD as it is a sata to molex for some reason. And I double checked it was all secure when putting in. The new gpu I have bought is the GTX 770 but i have not installed the drivers nor the card yet until i get the PSU working propperly.

Also I do not know my old PSU as it came with my pc

EDIT: The name of the old psu (as it says on the side) is a win power+plus 500w
 
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markwp

markwp

Dignified
Jan 22, 2013
3,183
0
14,960
That psu is useful only as a doorstop or a boat anchor. Do NOT use that psu with the 770 or with your system. Even though it says it is 750w, in actuality, it is probably closer to 350.

The 770 needs a 600-650w psu, and you need to spend a few pounds to get a good one. If you are using amazon, I would suggest THIS as the minimum starting point.

I know you're young and probably very budget minded, but the psu is absolutely the last thing to save money on when you buy. I know the psu I noted above is 40 pounds more than what you chose, but you absolutely need a quality psu. If the psu dies (and the Alpine will, and quickly), there is a substantial chance that it will also take the motherboard, cpu, gpu and other hardware with it.

A good psu is the best insurance you can buy for your rig.

Mark
 
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Solution
H

HowieeBoyy

Honorable
Nov 26, 2013
17
0
10,510



Thanks for letting me know, I'll send this back and hopefully get my money back.

 
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