CPU: AMD Ryzen 7 7800x3D
Motherboard: Gigabyte B650 Aorus elite AX v2
I recently saw videos related to an issue with Ryzen 7 processers from a year ago.
Gamers Nexus video describing the issue: https://www.youtube.com/watch?v=kiTngvvD5dI
Sperate video describing a fix: https://www.youtube.com/watch?v=EF76fdyx6fs
Having the same exact CPU concerned me, so I went to check if my SoC voltages were under 1.3v.
When checking HWinfo, I found 2 numbers related to SoC voltages. The first was from the CPU and the second from the motherboard.
Before making any adjustments in the BIOS:
- The CPU VDDCR_SOC Voltage was stable at ~1.290V
- The CPU VCORE SoC was ~1.34V +/- 0.01V
Afterwards, I adjusted the SoC voltage in the BIOS from "Auto" to a manual "1.23V"
HWinfo output after BIOS adjustment (CPU)
HWinfo output after BIOS adjustment (motherboard)
I have a few questions:
- Which SoC voltage should I be concerned with? The "fix" video looked at the readings from the motherboard.
- What does the SoC voltage affect and what kind of performance hit should I expect from lowering the voltage?
- Is the Bios change I made appropriate or am I being overly cautious?
2 Comments
VDDCR_SOC is SOC voltage measured at the CPU. CPU VCORE SoC is SOC voltage measured at the motherboard VRM.
Motherboard value – CPU value = loss induced by motherboard PCB and CPU socket resistance.
SOC voltage powers the IO die. This contains your memory controller, iGPU, PCI-E lanes, USB, etc.
Your previous SOC voltage was at the upper limit of safety, your new value is better.
There is no performance hit from running lower SOC voltage, as long as it remains stable. Run it as low as you can go without WHEA errors. Reduced SOC voltage means less waste heat and more power budget for the CPU cores.
Yeah it shouldn’t be going near 1.3v really. Most don’t need more than 1.2v