what is hpet mode?

DTV DRAGON · Mar 30, 2010

hey guys can ya tellme what hpet support and mode realy does in the bios,, it says it a high precision event timer, whatever that means, and by default it is set to 32bit mode. should i do anything with it like set it to 64 bit mode? or is it a waist of time?

francis511 · Mar 30, 2010

I think it`s for hyperthreading.

DTV DRAGON · Mar 30, 2010

hmm could be, but if iam running a 64 bit do ya think its a benifit for me to change it to 64 bit mode cause default is 32bit?

francis511 · Mar 30, 2010

http://en.wikipedia.org/wiki/HPET

There`s an entry in wikipedia but it didn`t make it much clearer for me !

W1zzard · Mar 30, 2010

HPET is a new timer that you can use to measure time. it's more accurate than previous methods, but only supported on vista and up

due to buggy implementations sometimes the 64 bit counter in the bios/motherboard doesnt work with the implementation in the 64-bit os, that's why you can change it to 32-bit here.

no reason to change it to 32-bit unless you have problems

all that changes when going from HPET to no HPET is that QueryPerformanceCounter uses the HPET, or not. nothing else

DTV DRAGON · Mar 30, 2010

so you are saying just leave it as is at 32 bit even though i have a 64 bit win7? or try 64bit and see if its buggy or not lol

W1zzard · Mar 30, 2010

set it to 64-bit if you want, makes no difference really

you can run this http://msdn.microsoft.com/en-us/library/dd424533.aspx to check if your hpet works right

oh i forgot .. with hpet enabled, applications that use timer functions gain a very slight performance benefit

also look in your PC's Event Viewer for a HAL error like this:
'Initialization of the High Precision Event Timer failed due to a BIOS configuration problem'

DTV DRAGON · Mar 30, 2010

you have given me more info on it that i can understand ,then what i found googling it

95Viper · Mar 30, 2010

Older Intel specification paper on High precision event timers, if you like reading, it may explain things.

If you don't like reading; there are a couple of pictures.

System Name	family system
Processor	intel quad core Q9650 o/c'ed to 4.1
Motherboard	gigabyte EP45T-USB3P ( new board)
Cooling	custom cpu and gpu cooling
Memory	8 gig G.Skills RipJaws @ 7,8,7,24,@1440mhz
Video Card(s)	HD5870 SAPPHIRE 1018@1310at1.29v on water
Storage	750 gig sata 7500rpm X2 seagate barracuda
Display(s)	acer 22.5 lcd
Case	Antec 600
Audio Device(s)	7.1 internal, soon to be auzentech x-fi forte
Power Supply	thermaltake 850 watt modular (new version, single rail)
Software	Windows 7, 64 ult.
Benchmark Scores	vantage E47428 3DMARK06 23290 needs updateing

Processor	Core I5 4440 / 4430
Motherboard	Asus z87-k / Gigabyte ga h97- d3h
Cooling	Arctic freezer / Generic
Memory	8 gb Mushkin / Various
Video Card(s)	Radeon 7850 cf / Gtx 690
Storage	Samsung 850 EVO 250 gb / 2x1 terabyte hdds Wd 256 gb nvme
Display(s)	Technika 32" / Asus 24` ips
Case	Corsair
Audio Device(s)	X-fi Titanium
Power Supply	Corsair 850 w
Software	Windows 10

System Name	family system
Processor	intel quad core Q9650 o/c'ed to 4.1
Motherboard	gigabyte EP45T-USB3P ( new board)
Cooling	custom cpu and gpu cooling
Memory	8 gig G.Skills RipJaws @ 7,8,7,24,@1440mhz
Video Card(s)	HD5870 SAPPHIRE 1018@1310at1.29v on water
Storage	750 gig sata 7500rpm X2 seagate barracuda
Display(s)	acer 22.5 lcd
Case	Antec 600
Audio Device(s)	7.1 internal, soon to be auzentech x-fi forte
Power Supply	thermaltake 850 watt modular (new version, single rail)
Software	Windows 7, 64 ult.
Benchmark Scores	vantage E47428 3DMARK06 23290 needs updateing

Processor	Core I5 4440 / 4430
Motherboard	Asus z87-k / Gigabyte ga h97- d3h
Cooling	Arctic freezer / Generic
Memory	8 gb Mushkin / Various
Video Card(s)	Radeon 7850 cf / Gtx 690
Storage	Samsung 850 EVO 250 gb / 2x1 terabyte hdds Wd 256 gb nvme
Display(s)	Technika 32" / Asus 24` ips
Case	Corsair
Audio Device(s)	X-fi Titanium
Power Supply	Corsair 850 w
Software	Windows 10

Processor	Ryzen 7 5700X
Memory	48 GB
Video Card(s)	RTX 4080
Storage	2x HDD RAID 1, 3x M.2 NVMe
Display(s)	30" 2560x1600 + 19" 1280x1024
Software	Windows 10 64-bit

what is hpet mode?

DTV DRAGON

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