Upgrade an GTX 745 to GTX 1660 on HP Envy Phoenix 850se?

[stewcr03]

I've got a HP Envy Phoenix 850se with a GTX 745 graphics card.  The GPU is a bit old, but the rest of the computer is still pretty relevant.  Trying to upgrade to the newest and most capable GPU possible.  I'm looking at the GTX 1660. 

I've actually got two PCI-E x 16 slots.  Also, there's a spare PCI-E 6 pin and PCI-E 8 pin coming from the power supply (as well as two spare SATA for HD expansion slots). 

The power supply is 450W.  The GTX 1660 take an PCI-8 pin which I think means up to 150 additional watts than supplied by the PCI-E x 16 slot (75W). 

How do I know if the power supply can handle the additional 150W?  Seems like it should with all the extra power connectors.  Am I missing something? 

[old_geekster]

@stewcr03 , welcome to the forum.

What is the full model or product number of the computer? I need this information to review the specifications of it. Please don't furnish the Serial # or other personal information. Here is a guide to help you find it:  https://support.hp.com/us-en/document/bph07555

[stewcr03]

The product number is: M0K57AV#ABA

[old_geekster · Accepted solution]

Thank you for the additional information, @stewcr03!

According to the Product Specifications page: https://support.hp.com/us-en/product/hp-envy-phoenix-850-000-desktop-pc-series/7779683/model/7805190...

The power supply unit (PSU) is actually 500W.  Here are the specifications for the GTX 1660 Super from nVidia: https://www.nvidia.com/en-us/geforce/graphics-cards/gtx-1660-super/?ncid=afm-chs-44270&ranMID=44270&...

Click on the tab titled "SPECS" and then on "View Full Specs".

It appears that they recommend a PSU with a minimum of 450W and 1x8-pin power connector.  Here is a HP Knowledge Base article that should help you with your decision: https://h30434.www3.hp.com/t5/Gaming-Knowledge-Base/Upgrade-Video-Card/ta-p/7447100

As stated in the article, it is recommended to have 100W to 150W more than the video card requires, but it is only a recommendation.  Manufacturers tend to over-rate the power requirements to protect themselves.  Your motherboard will have UEFI.  The only concern that I have is with airflow in a smaller case.  These newer video cards develop a lot of heat.  Follow the steps in the article to assure there is enough space for the card to fit easily.

[stewcr03]

Thanks much for the quick reply and helpful insight.

[old_geekster]

You are welcome, @stewcr03!  Glad to help.