AnsweredAssumed Answered

HPET on Windows 10?

Question asked by marekbujko on Dec 30, 2017
Latest reply on Jan 3, 2018 by blazek

Hello,

I noticed that Windows 10 does not use default HPET (High Precision Event Timer), but TSC (Time Stamp Counter).

Bcdedit had a given value: useplatformclock yes

So I deleted it: bcdedit /deletevalue useplatformclock

for disable HPET (AMD A10-6800K, Asus F2A85-V PRO).

My second PC with AMD FX 8350 (spec bellow) have default without useplatformclock value.

I also turned it off in BIOS -> HPET in time menu (Gigabyte motherboard, but some boards do not have this option, it's turned off only in Win 10).

I tested it on WinTimerTester program, where I had a HPET QueryPerformanceFrequency 14 MHz (AMD A10-6800K, Asus F2A85-V PRO). When I switched HPET off so it was only 3.9 MHz and the games go better, without microshuttering, higher FPS. Why is that so?

What are the overall advantages and disadvantages of HPET? Why does HPET have such a big and bad impact on games in Win 10?

 

  • Desktop System
  • CPU/APU: FX-8350 @ 4.2 GHz
  • AMD GPU: reference Sapphire RX 480 8 GB
  • OS: Windows 10 64 bit - Fall Creators Update
  • Driver version installed: Radeon Software Adrenalin Edition 17.12.1
  • Display: custom LVDS, LG panel - HDMI - 1920x1080 @ 60 Hz
  • Motherboard: Gigabyte GA-990XA-UD3 R5
  • PSU: EVGA 600B1
  • RAM : 8 GB
  • SSD: 500 GB Samsung EVO 850
  • HDD. Seagate Barracuda 7200.14 (2016)

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