The device in question is ThinkPad T460P with i7 7820HQ motherboard from T470p. Boards are interchangeable, and everything works fine with stock voltages.
Undervolting, however, gives very strange results. -0.085 CPU/Cache is stable on idle and in Cinebench R23, and the scores improve a lot thanks to lowered wattages/temps. No cache errors to be seen in those scenarios (idle, light load or stress test with CB).
However, heavy games like BeamNG.drive or Metro 2033 throw a lot of WHEA Cache L2 errors in HWinfo. What's strange about those errors is that 9/10 times they will appear like 100 at once, and after that they can add up by 2-5 every minute, or by 100. Without any crashes.
And once a single error shows up they will start popping up even I close the game and leave the laptop on desktop. To add more to the strangeness is that if I remove the undervolt by setting it to 0, the errors would still add up.
The only cure is to powercycle the system, and then the errors won't show up.
Lowering the undervolt to 0.056 seems to slightly delay the time it takes for heavy games to bring the first errors (or maybe it's a placebo)
Judging by the graph in HWinfo those errors tend to appear when there is big voltage/load/frequency spike. I've tried to set cache ratio to a smaller value (like 30), but this setting doesn't seem to work.
Am I that unlucky with the CPU lottery or is there something wrong with my settings/windows setup?
P.S. Could not fresh install of windows be the problem? I'm running the same installation that was used with original T460p motherboard (which had an i5 6440HQ with a successful stable undervolt of -0.153). I've deleted throttlestop.ini to reset the settings when I've replaced the motherboard.
Undervolting, however, gives very strange results. -0.085 CPU/Cache is stable on idle and in Cinebench R23, and the scores improve a lot thanks to lowered wattages/temps. No cache errors to be seen in those scenarios (idle, light load or stress test with CB).
However, heavy games like BeamNG.drive or Metro 2033 throw a lot of WHEA Cache L2 errors in HWinfo. What's strange about those errors is that 9/10 times they will appear like 100 at once, and after that they can add up by 2-5 every minute, or by 100. Without any crashes.
And once a single error shows up they will start popping up even I close the game and leave the laptop on desktop. To add more to the strangeness is that if I remove the undervolt by setting it to 0, the errors would still add up.
The only cure is to powercycle the system, and then the errors won't show up.
Lowering the undervolt to 0.056 seems to slightly delay the time it takes for heavy games to bring the first errors (or maybe it's a placebo)
Judging by the graph in HWinfo those errors tend to appear when there is big voltage/load/frequency spike. I've tried to set cache ratio to a smaller value (like 30), but this setting doesn't seem to work.
Am I that unlucky with the CPU lottery or is there something wrong with my settings/windows setup?
P.S. Could not fresh install of windows be the problem? I'm running the same installation that was used with original T460p motherboard (which had an i5 6440HQ with a successful stable undervolt of -0.153). I've deleted throttlestop.ini to reset the settings when I've replaced the motherboard.
