HP Pavilion Gaming TG01-0023w gpu upgradeing

[Prométhée]

You have to make a choice, HP memory will normally be compatible, but the price can be very high.
You can find the references sometimes on the site

https://parts.hp.com/hpparts/ChangeCountry.aspx?mscssid=EDBE08E6438144408445B1EAA5D93C9A

If you have the part number, but not available, you can search HP partners
Or with this reference, search with a search engine like google, but the error can be possible, I have already seen sellers using the references anyhow!
Otherwise, take a risk to buy non HP modules you have this site which is rather efficient

Welcome to Crucial USA
But here it is better not to mix the HP modules with!
For the rest, stick to the good advice already given by @old_geekster 

[edit]

if this one :

Product Number: 6YR56AA
Description: HP Pavilion Gaming - TG01-0023w

934254-800   Part is not orderable in the HP Parts Store.
Memory - GNRC RAM UDIMM 8G DDR4 1.2V 2666  
RoHS: COMPLY_2.06

[B00G3YM4N]

i know that but what about what there saying cuz my ram is not from hp its from crucial so and my other stuff is also not hp its a stock single fan gtx

[B00G3YM4N]

promethee i seen a lot of people use that ram and others and there say its fine so i am gonna try the ram you said cuz it has Crucial in it and then try xvg or lpx ram ok now for the rtx they say its working fine in theses.  I know a lot of people and like said to geek and ill get a 500w or try it on the 400w if the psu or i see it over heat ill take it out and keep the stock gpu i am just testing this stuff i love this hp as i spent money on it lol. I love the advice from u 3 and the other guy is right but also maybe hp has it to ware the rtx works with the 310 or 400w psu so if any of you can send me a link to hps stock rtx 2060 ill buy it from them thanks for the answers.