Not only did I see reduced performance across all games, I also noticed erratic mouse cursor movement and even Windows GUI performance degradation. Those 3yr old benchmarks were on my 8700k + 1080 Ti. I find that using this in combination with setting a system 0.5ms timer with ISLC gives a very consistent and low input lag experience. Saying that hpet reduces input lag or increase fps is misleading, I highly recommend to watch Fr33thy video about HPET, the general rule is ON in the bios and OFF in Windows 10. , 16:45Hpet generally forces the timer resolution to be rounded down, what it means is that 1 second is not 1 second according to your machine (it's generally slightly less), this screws any form of time sensitive fps or latency calculator, from fps benchmarks to even AIDA64 latency benchmar.Ģ50 frames in 1000ms = 250fps, 250 frames in 950ms = 263fps (just to make an example of how HPET OFF can screw benchmarks in windows 10) HPET/useplatformclock was literally the only change between the 2 runs. The "mouse feel" will likely change with HPET on/off so although I don't have any experience with an AMD or Ryzen system, I can guess that you simply prefer the HPET mouse feel in your system-specific setup (HW & SW).īelow are 3yr old FC5 benchmarks with my older configuration. However, with testing across 2 systems (my old Q6600 and my current 8700k builds with various GPUs) I've clearly found that HPET has severely degraded gaming performance on my Intel systems. Lower max ISR and DPC latency by definition is an indicator of how quickly your system can respond to any given interrupt and execute the driver routine and/or other code.Ĭlearly, if any of your input devices or GPU processing latency is unaffected in this regard, then technically, you may not see reduced input lag.
Sorry, but generally speaking, that's incorrect.
On my Ryzen PC with Windows 10 v2004 I have HPET enabled in BIOS and "useplatformclock true" in OS because it gives me better mouse input (less input-lag), and honestly I couldn't care less if this tweak raises DPC latency from 30 to 50. "Better DPC latency" doesn't necessary mean "better input lag". , 14:08However, as he mentions, do not enable HPET if you want low latency.
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