I need help with upgrading Power Supply on HP ENVY Desktop - 750-427c

[Shirley2021]

Hi I'm trying to upgrade the power supply of my PC as the one I have currently is only 300W and I need a new one if I want to get a new GPU. I am thinking of getting a RTX 3050/60,  RTX 2060/70 GTX 1060 or if I can't get any of those I'll get a 1650, I may also get a new CPU . However I'm not sure if  the PSU I want to buy will be compatible, this is what I had in mind for my upgrade.

https://www.amazon.com/EVGA-Supernova-Modular-Warranty-220-G6-0750-X1/dp/B0998KZ8SP

I heard prebuilt PCs such as my own require proprietary power supplies which have proprietary pin connector to connect to the mother board and components which I'm not sure what they exactly are. Here is the info about my computer

https://support.hp.com/us-en/document/c05257472

I'm hoping you can give me more insight about this topic as I want to know if I can use the PSU and if I'd have to use any proprietary pin connections or I have chosen to buy or I can buy a different on that will work just fine. I'm looking for something around 750W.  

[NonSequitur777]

Hi Shirley2021, I would like to give this a shot.

Please take a careful look at this 460 watt power supply unit: https://www.atxpowersupplies.com/460-watt-power-supply-Sparkle-SPI460PFB2.php, and see if the PSU connectors match yours.

This PSU is supposedly compatible with the HP Envy 750-xxx series.

I am not affiliated with HP.

[Shirley2021]

Is this where HP get's their supply the site seems old 

[NonSequitur777]

Hi Shirley2021,

Thank you for asking this question -no, this is a non-HP affiliated company.  The intent is to find an upgraded power supply for your desktop, which often is not made available by HP, thus we have to look elsewhere.  I just emailed this company with some questions about the compatibility of this PSU for your desktop.  Will keep you informed.

[EDIT:]  It is, in my opinion, very unfortunate that HP equipped very nice desktops like yours with anemic 300 watt PSUs.  It would seem reasonable that once you introduce a PCIe X16 graphics slot on a motherboard, you want to offer your customers plenty of GPU upgrade options, but 300 watt doesn't go very far when it comes to installing higher end GPUs.

And come to think of it, even if the aforementioned 460 watt PSU were to be compatible with your PC, it would definitely not be enough if you're thinking RTX 3060.

Anyway, I also contacted other companies, including "MemoryClearance", and their tech support claims that there are no 500-750 watt replacement PSUs available for your desktop.

There are alternative but non-HP approved/endorsed power constructs available [DISCLAIMER!], but that would involve adding a daisy-chained external PSU to power your high end GPU.  If you are interested, please let me know.