Omen 25L Desktop, issues with NVIDIA RTX 3070, 500W power supply enough?

[Andy_Hg]

Hi,

I am having issues with my GPU RTX 3070. The signal going to one or more monitors is not constant. Sometimes the monitor(s) go(es) dark for any period of time from 2-3 sec to forever.

After I contacted NVIDIA support, they told me that the RTX 3070 requires a PSU of at least 650 W (instead of the 500 W which is mounted). And they suspect, that the issues result of not enough Power supply.

What can I do?

Thanks

Andy

[NonSequitur777 · Accepted solution]

@Andy_Hg,

Welcome to our HP Community forum!

Well, the Nvidia support team is correct -an RTX 3070 typically requires a minimum 650-watt power supply, while the OMEN 25L GT11/GT12-0000i comes with a 500-watt PSU, which is likely insufficient. The symptoms you’re experiencing -intermittent signal loss and black screens, are common signs of power instability.

Solutions:

1. Upgrade the Power Supply (Recommended)

Since the stock 500-watt PSU is underpowered for an RTX 3070, upgrading to a 650-watt or higher PSU is the best long-term solution.

• Recommended PSU:

  • Minimum: 650-watt (80 Plus Gold)
  • Ideal: 750-watt (for headroom and future upgrades)
  • Preferred brands: Corsair, Asus, Thermaltake. 

• Things to Check Before Buying:

  • The OMEN 25L uses a standard ATX PSU, so you can install any high-quality aftermarket PSU.

 

2. Reduce Power Draw (Temporary Workarounds):

If you cannot upgrade the PSU immediately, try these steps:

• Lower the GPU Power Limit
  • Use Asus Tweak III, MSI Afterburner or NVIDIA Control Panel to reduce power consumption of the RTX 3070 (e.g., limit to 80–90% power).
• Disable GPU Overclocking
  • If overclocked, revert the GPU to factory default settings.
• Use Fewer Monitors
  • Running multiple monitors increases power demand; testing with only one may reduce crashes.
• Avoid High-Power Games or Applications
  • Running less demanding applications can reduce GPU power spikes.

 

3. Check for Other Possible Issues:

If the issue persists after upgrading the PSU, consider:

• Faulty DisplayPort/HDMI cable – Try replacing them.
• Driver conflicts – Use DDU (Display Driver Uninstaller) to clean install the latest NVIDIA drivers.
• Reseat GPU and power cables – Ensure the GPU is properly seated, and all PCIe power cables are firmly connected.

 

Conclusion:

The best likely fix is to replace the 500-watt PSU with a 650-watt or higher unit. If an upgrade isn’t possible yet, lowering GPU power limits can help temporarily.

Kind Regards,

NonSequitur777

[Andy_Hg]

Thanks for the quick reply. I will try replacing the PSU.

[NonSequitur777]

@Andy_Hg,

Replacing the power supply is a piece of cake: Replace the Power Supply | OMEN 25L GT11-0000a, GT11-0000i, 30L GT13-0000a, GT13-0000i | HP.

Kind Regards,

NonSequitur777

[Andy_Hg]

Thanks for the link. Two more questions:

1. I have an HP Omen L25 GT12-0xxx. Is the repalcement of the PSU the same as at the GT11 and GT 13 (as in the video)?

2. If I buy a new PSU: Does it already include all the cables in the right length?

best regards

Andy

[NonSequitur777]

@Andy_Hg,

There is no difference whatsoever between the GT11 or GT12.

Yes, all the power supply's power cables you'll need for your PC are included.  Personally, I prefer a so-called "fully modular" power supply, where you only plug in the power cables you need, which makes cable management a breeze.  The (cheaper) non-modular power supplies have all the power cables permanently attached to the unit.

Kind Regards,

NonSequitur777