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Ryzen- What is "CPU VDD" powers? It's higher than CPU package powers!


Utopia-Phoenix
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^^read topic

I've overclocked my R7 1700 with MSI X370 krait gaming MB. It's set as 1.4125V at 3875 Mhz and I've been frying it with Prime95.

I read the powers stats and found it quite similar to the Intel platform (4790K/Z97) I used before. There is a CPU package power and a CPU VDDNB power. I assume that they are the powers corresponding to the CPU core, and the X370 chipset.

Then I've found there is another power stat known as CPU VDD, and it's higher than the CPU package power! What is this and does it apply to my heatsink?

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On ‎2018‎. ‎01‎. ‎23‎. at 10:43 AM, Utopia-Phoenix said:

^^read topic

I've overclocked my R7 1700 with MSI X370 krait gaming MB. It's set as 1.4125V at 3875 Mhz and I've been frying it with Prime95.

I read the powers stats and found it quite similar to the Intel platform (4790K/Z97) I used before. There is a CPU package power and a CPU VDDNB power. I assume that they are the powers corresponding to the CPU core, and the X370 chipset.

Then I've found there is another power stat known as CPU VDD, and it's higher than the CPU package power! What is this and does it apply to my heatsink?

The CPU Package value and the other 2 values (CPU VDD power and CPU VDDNB power) are measured using different interfaces of the CPU.  Hence their values may not match each other, and one (or both) may well be inaccurate -- we've seen such issues with previous AMD processor generations like Kaveri already.  BTW, VDDNB is the north bridge (memory controller and fabric) section of the Ryzen CPU.

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