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Hi everyone, im looking to upgrade my hp 8300 further with a gtx 1070 and a 500 watt psu but I dont know if have a 500W psu to this old pc is safe (not if it'll fit) but if it'll get fried so whats the max watts the hp 8300 motherboard can handle before getting cooked? 

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In this thread, they are discussing the question

https://h30434.www3.hp.com/t5/Desktops-Archive-Read-Only/Graphics-Card-upgrade-for-HP-Compaq-Elite-8...  Notice there are two pages. 

https://h30434.www3.hp.com/t5/Desktops-Archive-Read-Only/Graphics-Card-upgrade-for-HP-Compaq-Elite-8...

The last page has a link to a YouTube video where there is a long explanation

https://www.youtube.com/watch?v=0VCslFs6lW0

To owners of the SFF (Small Form Factor) model of the HP Compaq Elite 8300 computer:


I'm not an HP employee.
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HP ELITE 8100 8200 AND 8300 SERIES MINITOWER USE YOUR OWN PSU WITH A CABLE CONVERTOR SO NOW YOU CAN INSTALL A DECENT GRAPHICS CARD :). The cable is for sale here update 24 May 2018 https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F113012217849 All cables are tested
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