Is it possible to charge Gigabyte RTX 3060 12GB with original 925W power supply of HP Z640?

[akb85]

Hello, I would like to buy Gigabyte GeForce RTX 3060 GAMING OC 12G (rev. 2.0) and upgrade my workstation HP Z640.

The video card needs 170W and the PC power supply is the standart 925W. There are 2 x 6 Male pins from the PSU and as I understand they will provide total 150W (75 each). 

❓1. Will the PCIe 3.0 port of the motherboard provide another 75W to the video card and it will have 225W total? Are these 225W too much for the video card and it's possible to burn out?

I read that I have to connect the 2 x 6 Male pins from the PSU to the 8 Female pins of the RTX 3060 with extention cables. They will connect both and provide these 150W to the video card.

❓2. How can I be sure the extention cable will provide these150W and not more or less? I see a lot of options for 2x6 Female to 8 Male extention charging cable, is there a difference between all providers of these cables?

[NonSequitur777 · Accepted solution]

@akb85,

Welcome to our peer-to-peer HP Community Forum!

You can absolutely use the dual 6-pin PCIe to 8-pin PCIe power adapter cable to power your RTX 3060.

Your high-end, quality stock HP 925-watt power supply has more than sufficient juice to power this card.  Yes, your PCIe x16 slot can/will provide up to 75 watt, whilst the dual 6-pin PCIe to 8-pin PCIe power adapter cable will provide whatever power your card needs: your graphics card will only use the power it needs, and no more.  You cannot burn out a graphics card like that.

Hope this was helpful.

Kind Regards,

NonSequitur777

[akb85]

Thank you very much! I will purchase everything now 💲💲💲

[NonSequitur777]

@akb85,

You are most welcome -let us know how things go!

Kind Regards,

NonSequitur777