As mentioned in other threads I’m currently trying to undervolt my 2700X. My default process is undervolting via my BIOS’ offset mode and reducing the voltage step by step. After undervolting I boot into my system, work/game for a couple of days and after that I fire OCCT 4.5.1 (10min, 0 idle periods, 64bits, large date set, 16 threads) for 10 minutes. I read online that most unstable overclocks should be detected in 5 minutes, which is why I doubled the duration to be on the safer side. (I don’t intend to achieve a 24/7/365 stable undervolt, but I don’t like any surprises either ). I have the OCCT results on my PC and if someone’s interested I can upload a requested picture.
Currently, I’m at -50mV and I haven’t encountered any problems so far. According to OCCT my maximum temperature was 47° which seems perfectly fine and I’m hitting 3.949GHz on all cores (with peaks to 3.9GHz).
What I’m wondering is if undervolting might increase the CPU’s clockspeed, because of the way SenseMI works, but further testing should be requied to determine this.
The next value I’m going to (probably) try is -60mV. Once I’ve tested this, I’ll update this thread.
2x Ballistix Sport LT 16GB Single DDR4 2400 MT/s
NXZT Kraken x62
(I know that faster memory would have been better, but I grabbed these sticks when the were on discount on Amazon and I think that purchasing 3200 or 3400 RAM wouldn’t be worth it)
Edit - Final Note:
I have concluded my undervolt testing. At -75mV I encountered some minor stability issues, which is why I went back to -62.15mV. I’ve also started to mistrust CPU-Z’s benchmark, because even when running the single threaded test my clock was at all-core lows. (Thanks to @Ruffalo again for reminding me to look the core-clock).
As a result I downloaded cinebench r15 and used it to benchmark my undervolts. My procedure was the following: When I boot my PC I start cinebench and run it 3 times for multi and single threaded. I do this for three days with the same undervolt. After that - and after a successful OCCT run - I try a lower undervolt. Here are my results:
-75mV --> 6 runs only
I should be noted that “Stock” settings are the settings used by my mainboard at"Auto", so there might be a difference to a 0.0 offset, but I’m not sure. The percentage values are always compared to the stock settings of course. As can be seen, it is safe to assume that undervolting does not slow down my CPU. If anything, it might get a tiny bit faster
Therefore, I can only recommend undervolting to every Ryzen owner, feel free to aks questions
Edit: Fixed all comma ("." vs “,”, e.g. 0,5 vs. 0.5) and mV (-0.5mV -> -50mV) errors…