Adjust voltage settings for the 9750H model.
Adjust voltage settings for the 9750H model.
Hey everyone, I just tried undervolting my laptop using Intels XTU software. The machine is an Intel i7-9750H with 2070MaxQ, 32GB of 2666 memory, and a 1TB Intel 660p NVMe drive. I began by running a 30-minute stress test in XTU to check baseline temperatures and speeds. After letting it cool down, I kept it idle for about an hour. Then I switched it to the "Redline Gaming" power mode and ran R20, which gave me a score around 2345. I gradually lowered the voltage by -0.010mV each time, reaching a stable -0.200mV setting. After another round of testing with R20, I checked stability and temperatures again—still solid performance.
The final stress test lasted three hours and passed. Now I regularly use a -0.200mV setting. While my power consumption is still high in battery saver or balanced profiles, I don’t notice a big difference when gaming. Most people who tried this saw their temps drop by 4–5 degrees or more with just -0.050 to -0.100mV. I wonder if my settings are too aggressive or if I should check the GPU as well? Also, have you considered changing the thermal paste for better heat dissipation?
I was considering pushing it even further, maybe down to -0.300mV undervolt. It's been about a week since I've been running at -0.200mV, and the system has stayed really stable. I figured it might give me more noticeable improvements in my thermals and battery life, even though both seem fine. I actually achieved a 16% boost in performance.
Undervolting reduces power only when the CPU consumes less energy. On these 6 core (and more) units they are built to stay within limits most of the time, allowing them to operate faster without lowering power. Conversely, other processors might already reach their maximum speeds or close to it from the start, so they maintain similar power consumption after being undervolted.
Additionally, the voltages observed during hardware monitoring while executing R20 clearly indicated a consistent undervolt condition. My baseline voltage seemed to be between 1.380 and 1.425. During the R20 or XTU stress test, it appeared my voltage stayed around 1.188 to 1.265. This suggests the undervolt issue was effectively resolved. Even under sustained stress, my boost clocks maintained stability, dropping to 3.5GHz during the test and settling at 3.72GHz afterward.