Upgrade PSU

[Bervenia]

Hello everyone,

I'm currently trying to upgrade my GPU to RTX 3070 but the current PSU, HP 849655-001 - 500W,  is not big enough power supply. Does anyone know of a compatible 650w or above I can use in my machine?

Also I'm not certain, but I'm pretty sure the RTX 3070  is compatible with machine (minus the PSU) with smaller dimensions then the current GTX 1070 and its PCIe 4 card is backwards compatible with the motherboards PCIe 3 slot. Please let me know if I am horribly wrong.   

Thank you,

[old_geekster · Accepted solution]

@Bervenia , welcome to the forum.

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@Bervenia wrote:

Hello everyone,

I'm currently trying to upgrade my GPU to RTX 3070 but the current PSU, HP 849655-001 - 500W,  is not big enough power supply. Does anyone know of a compatible 650w or above I can use in my machine?

Also I'm not certain, but I'm pretty sure the RTX 3070  is compatible with machine (minus the PSU) with smaller dimensions then the current GTX 1070 and its PCIe 4 card is backwards compatible with the motherboards PCIe 3 slot. Please let me know if I am horribly wrong.   

Thank you,

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Here is a HP Knowledge Base article to tell you what to consider when upgrading your video card: https://h30434.www3.hp.com/t5/Gaming-Knowledge-Base/Upgrade-Video-Card/ta-p/7481981

The two major things to consider as stated in the article are 1) the length of the card and 2) the wattage required to run it properly.  The 650W minimum for the 3070 is a bit low.  Here is a Power Supply Calculator to help you determine the wattage that your system will need: https://www.newegg.com/tools/power-supply-calculator/?nm_mc=AFC-RAN-COM&cm_mmc=AFC-RAN-COM&utm_mediu...

You can use any standard ATX PSU.  I like Corsair products.  A full modular PSU is good in smaller mid-size cases like yours.  They allow you to use only the cables that are absolutely necessary.  This allows for better airflow in the case.  It is extremely important with the 3070 series cards.  They develop a lot of HEAT!

Your statement about the 3070 being backward compatible should be correct.  I have not heard anything to the contrary.  The length of the card depends on the number of fans.  My RTX 2080 Gaming X Trio is 12.87" in length.  Of course, the most difficult part of the equation is finding the 3070.  Everywhere that I have looked is sold out.

Please click the Thumbs up + button if I have helped you and click Accept as Solution if your problem is solved.