Default vcore for Ryzen 7700

Anooshorseville · 5 Apr 2023 at 07:29

Greetings.

I have been out of the PC scene many years, just getting back into it.

I have a Ryzen 7700 which arrived yesterday. The 7000 series are pretty new so info is really hard to find, I have tried Youtube and googling like mad and of course looking at 'specifications' on AMD website, but nothing is turning up 'specific' to my question.

I am currently using PBO Curve Optimiser -30, my concern is how high the vcore is on the 7700, before I did that, it was going up to 1.34+ under stress test/load and I **** my shorts.

As I said I am on -30 now, and that's brought it down to 1.224, which is less concerning, but despite googling I just can't find a damn straight answer as to what sort of default vcore under load I should be expecting/aiming for, with a 7700 (non X) on default. And maybe what would be normal after PBO -30.

Any info in general appreciated. I feel really in the dark here..

My specs;

Ryzen 7700 (NON X)
Gigabyte B650 GAMING X AX
Corsair 32GB 5600 CL36

Temps are fine btw.

CPU-Z under load/stress test.

Dg834man · 5 Apr 2023 at 13:17

Anything between 0.9-1.5v depends on load nothing to be worried about.

Anooshorseville · 5 Apr 2023 at 14:32

Aye, I meant to say under load.

str · 5 Apr 2023 at 16:01

I am interested in this type of thing too and I have been writing diagnostics programs to learn more.

The evidence shows the answer to be a core voltage range from the lightest 100% load (highest clock/core voltage) to the heaviest 100% load (lowest clock/core voltage) and the actual voltage supplied is dependant on the voltage requested by the worst core.

My 5950X B2 with Auto PBO settings running 32 threads (2 per core) at a light 100% load (TDC ~65A), clocks the cores at 4.65GHz and the best core's max voltage request was 1.153v (avg 1.151v) whereas the worst core max requested was 1.261v (avg 1.259v) and the all cores average was 1.22v. The average voltage supplied by the VRMs was ~1.34v.

To be clear, a single Core Voltage is provided by the VRMs, so regardless my CPU's best core max voltage request was 1.153v, it received 1.261 because of the worst core.

When I change the program to increase the 100% load (PPT maxed at 142W, TDC ~91A) it resulted in 4.41GHz at average 1.133v and the average voltage supplied by the VRMs was ~1.2v.

All voltage readings were obtained from the CPU's PM Table.

For reference with the higher load run I had CPU-Z running and it showed a constant 1.232v which corresponded with the Vcore reading provided by the motherboard.

Anooshorseville · 5 Apr 2023 at 16:58

str said:
To be clear, a single Core Voltage is provided by the VRMs, so regardless my CPU's best core max voltage request was 1.153v, it received 1.261 because of the worst core.

This is all much more complex than what I was after, but understood, idea being you could underclock the weakest core a bit and up the others with less overall vcore being supplied to the chip? :confused:

I myself mind was just wondering in for example, CPU-Z, what sort of vcore, on default settings, would be expected for a 7700 under load - as I was surprised, and concerned, by being faced with 1.34v, under a load.

str · 5 Apr 2023 at 17:33

I know what you mean.

The evidence is that the max all-core voltage from the VRMs is ~1.35v assuming the core temperatures and power consumption allows it to be that high which probably corresponds to a little bit less than what is reported in CPU-Z (Vcore provided by external motherboard sensor).