Tomahawk X870 + RM850x V3.3 voltage
Tomahawk X870 + RM850x V3.3 voltage
I had another RM850x available, tried swapping it to check the impact, and the range narrowed slightly (3.248 to 3.260), though it remained largely unchanged.
The age of both PSUs is likely quite old—probably beyond what you need to worry about now.
My Lian-Li SP850 has a voltage that fluctuates between 3.332v and 3.344v. If you're not pushing the system hard, keep it as it is but monitor for any issues.
For your setup, here are the details in the requested format:
CPU: [CPU info]
CPU cooler: [cooler info]
Motherboard: [motherboard info]
Ram: [ram info]
SSD/HDD: [storage info]
GPU: [gpu info]
PSU: [psu details]
Chassis: [chassis info]
OS: [os info]
Monitor: [monitor info]
PSU age: [age in years]
BIOS version: [current version]
Both power supplies are less than a year old.
CPU: 9800X3D
CPU cooler: NH-D15 G2
Motherboard: Tomahawk X870 (latest BIOS)
Ram: 32 GB Kingston CL36
Storage: Lexar 4 Tb
GPU: Geforce RTX 5080 Asus Tuf
PSU: RM850x (both under a year old)
Chassis: Fractal Torrent
Operating System: Win11
Display: LG850
Everything is fine.
The 5% at 3.3V equals 0.165, which falls within the range.
Also possible issues exist with the voltage sensors themselves to consider. I remember my RM850x displaying low readings on the 3.3 volt level. With minimal load currently, it might be running slightly low during idle in a standard CPU/GPU/M.2 SSD configuration.
Changed the ATX cable and the power supply unit: identical outcome.
Doesn't suggest any issues with the power supply itself? The consistency between two similar units seems to point to a minor inaccuracy in the motherboard's sensor, not a problem with the PSU.
It is within the ATX spec regardless if the sensor is underreading or the PSU is a little low. As long as your system is functioning it is not worth worrying about.