Upgrading Power Supply a6040n

[Silverthunder]

I am trying to upgrade the power supply because I installed a video card and so the 250W that was in there might not be sufficient anymore.

I have a Corsair CX450.  It seems that both power supplies are ATX power supplies (both the one that I am removing and the one that I am putting in its place).  

First, here is a link to the specs of my computer.

https://support.hp.com/us-en/document/c00878693

Link to spes of the new power supply:

https://www.corsair.com/us/en/Power/Plug-Type/cx-series-config/p/CP-9020120-NA

The old power supply is ATX-250-12Z Rev. D3R

I see that the old power supply has this info printed on it:

+12V 14A

+5V 25A

+3.3V 18A

-12V 0.8A

+5VSB 2A

The new power supply has this info printed on it:

+3.3V 20A

+5V 20A

+12V 37.4A

-12V 0.8A

+5Vsb 3A

So, the voltages on both are the same.  The difference is the amps.  Will it work?

 Also, one of the connections on the motherboard is 24 pin.  The power supply that was in there is 20 pin (it was still inserted into the 24 pin).  The new power supply that I am putting in has the 20 pin, and a 4 pin adapter attached to it.  

Based on this article, it seems like I might be able to use all 24 pins.  But, the article does caution the reader about HP proprietary power supplies.

https://www.smps.us/20-to-24pin-atx.html

[Barachiel]

@Silverthunder

Thank you for posting on HP Forums, 

Barachiel is at your service. 

I Understand you are in need of support,

And to help you out, I'm sending out a Private message with the required information's,

Good Luck. 🙂

[Silverthunder]

It's ok to replace a power supply with one that has higher amps for one of the voltages.  When you are taking out a lower watt power supply and installing a higher watt power supply, that's just going to be the case.  You see, watts = amps * volts.  So, the power supply has the same voltage on a rail but higher amps, resulting in the higher wattage.

The new power supply stated in the OP, however, has lower amps on the 5V rail.  So, it can't deliver as much power to the 5V computer components.   

[JROS2k]

Hey there Silverthunder!

This may seem daunting and all, but yes, you can replace the power supply just fine.

All voltages and amperage are standard, the power supply will just be able to take a higher power load before overloading. 

Think of it as a glass of water versus a pitcher of water, one can hold more than the other before overflowing

The 20+4 pin motherboard connector is simply so it can work on all motherboards. If you only had a 20 pin motherboard connector on the old power supply, plug in only the 20 pins to be safe. they only had those plugged in for a reason.

To answer your question, Yes! You can replace your power supply.

Great choice on Corsair too, I love their products.

I hope this helped you, Have an excellent day!