Replacing my PSU, help?

laurence95 · Aug 23, 2014

Hello, I am replacing my Power supply for my HP Computer.
Here is my exact computer:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03513449&tmp_task=prodinfoCategory&cc=uk&dlc=en&lc=en&product=5311892#N203

As I am upgrading my GPU also, I need a power supply of 750w or over.
My problem is, does it have to be the exact dimensions of my current psu?
And do you recommend any?

tiny voices · Aug 23, 2014

What GPU are you going to use? I highly doubt you need 750w.

Also if you are spending that much on a new GPU, you should be able to fork out $40 for a new case to hold this all properly.

SnakeGTX · Aug 23, 2014

The form factor of the PSU is just called ATX. The ATX12V will also work, and that is the standard PSU for computers now days.

Most GPUs do not need a 750W PSU. That power is really only for SLI/Crossfire GPUs. Here is an example: GeForece GTX 780 Ti (most powerful card) only requires a 600W power supply.

If you are really needing a PSU with atleast 750W, this is one of the best. And if you are on a budget, here is a PSU that is going to do its job, but isn't the best quality.

Also, here is a very useful tier list for PSUs.

avenseth12 · Aug 23, 2014

Your computer is not that bad, but the power supply in there is most likely a really bad 460 watt model. HP and Dell are notorius for using low rated power supplies. Depending on which gpu you want to buy (give us what you are thinking) you can probably use a good quality 550 to 600 watt to power your system.

laurence95 · Aug 23, 2014

I am investing in a GTX 780 by Asus. A new case is a last resort for me, apologies. I am clueless about installing hardware. This will be challenging enough. My case right now is well ventilated and the stock fans run excellently.
Im genuinely new to this. I gamed on mostly consoles for the past numerous years.
Does my new psu need to be the exact same size as my current one, to fit in the case and at the back of the case?

Also Id prefer a 750w psu, Ive heard 600 isnt enough.

tiny voices · Aug 23, 2014

650w is more than enough for a single 780 and anyone saying anything different is liar. get an XFX 650w unit.

laurence95 · Aug 23, 2014

Does the PSU dimensions matter? if they slightly differ in size with my current one?

tiny voices · Aug 23, 2014

No, your computer uses an ATX PSU. Any modern PSU will fit. They might be longer, but not wider.

Also if you are not getting a new case, I STRONGLY recommend a fully modular PSU as you will have SO many cables to deal with in that case with absolutely ZERO cable management.

I do recommend a new case though. A gtx780 in a prebuilt case is a recipe for disaster

laurence95 · Aug 23, 2014

Ok thank you.
Yes I know it isnt the greatest. I will be monitoring the temperature, dont worry.
My next step would be to fit a water cooler. If that makes no change then I will buy a case, and no doubt send it to a professional.

avenseth12 · Aug 23, 2014

I agree with Tiny, when you open that case you will see how tight the inside is. I would like about a good solid case like this:

Corsair Carbide Series 200R $59
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139018

tiny voices · Aug 23, 2014

You won;t be putting a water cooler in that case. Isn't possible. Just get a nee case. I also don;t recommend closed loop water coolers. they are loud and expensive and easily beaten by air coolers for less money and noise.

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Replacing my PSU, help?

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