Hpet

okay firstly i hope i posted in the right section...

i stumbled across this by accident. seems nearly everyone is advising to disable it, so i tried to myself. don't get me wrong i've done a lot of googling, but this command

bcdedit /deletevalue {current} useplatformclock

doesnt work for me. Says "An error occurred while attempting to delete the specified data element. Element not found."

My bios (being Dell ) has no bloody options worth changing either. I have no idea if HPET is still enabled, or is 32 or 64 bit. The only indicator is command

bcdedit

that shows Boot Loader not having the line for HPET at the end.

 

bump (10char)

 

why do you need to disable it?

Basically everything I am reading is indicating its a good thing to have running it has no real negative effects on a system, If anything it has positive effects in video playback, java and so on so forth.


I haven't read every line but the trend is good.


Sources

http://msdn.microsoft.com/en-us/windows/hardware/gg463347.aspx#ECD

http://www.ephur.net/2008/07/25/hpet-no-not-a-toy-a-way-to-save-lots-of-cpu-time/

http://www.intel.com/hardwaredesign/hpetspec_1.pdf

 

Guru3D.com Forums - View Single Post - AMD Catalyst Von modded

you're getting from MS and Intel which are the designers of HPET, so obviously they can only praise their creation

 

I merely linked their hard facts of what it is, There is no real reason to turn it off.

the post you linked while very informative is for one specific machine. Is it the same as yours? are you seeing issues to really feel the need to turn it off? The only real reason in that post that particular person mentioned was for gaming rigs running Sli. I have asked but you haven't highlighted any reasons other than someone said to turn it off. you haven't highlighted any issues to warrant it.

I mean come on we are talking tenths of a millisecond! what are you going to really need to get that time back for? if it was seconds then I could see your reasons.

 

>< my question was how to disable HPET, and check if its HPET 32 or 64 bit.. and why is the command line not working.

 

OK fair enough. I'm not trying to say you shouldn't do this. I am just trying to highlight that IMO, You haven't raised it as an issue to warrant the need to disable it.

If you want to continue then go ahead. I hope I have no way caused any issues or passed any wrong judgement. Also from your link you gave it has a link and guide on how to disable it if your motherboard (as you have said) won't allow you to disable it.

 

bump after a long while

 

HPET has to be enabled/disabled from the BIOS or UEFI layer. If the option doesn't exist to enable/disable it in your BIOS, you can't switch it on/off.

Basically what I got from what you linked is that he disabled HPET to decrease DPC latency. That is a real issue, and on some notebooks it's pretty bad. That's the only real reason I would consider disabling it though. If DPC latency is pretty bad it can cause microstutters all over the OS, including audio output. So are there any issues in particular you think that disabling HPET would resolve?

 

As HAL said, best done in the BIOS.

Check ACPI tables, for instance you could use RWEverything.

Because you can not delete something that has not been created in the first place.

You'll probably find W7 default behavior is to use the CPU clock and not HPET. You can check this post to see what is being used.

Using the useplatformclock option just tells the OS to use HPET or CPU clock for timing, it does not disable the HPET.

 

hmm audio works just fine.. but i have some games that i experience microstutters (checked not throttling, overheating) while my friend's lappy is nearly identical..

 

this could be a large number of factors causing this. Not necessarily the Hpet.

 

Graphics drivers? Settings too high on an HD4670?

 

hmm by some rights his lappy SHOULD be slower than mine.
both are Studio XPS16, differences:
His i7-820qm, 1333MHz 8GB RAM, Factory drivers (never updated), HDD nearly full (red), tons of apps running in the tray

mine i5-520m, 1066MHz 4GB RAM, 10.11 catalyst + ati tray tools tweaks + rivatuner OC, HDD with Diskeeper & plenty of space, tray next to empty

same game, same settings. I've searched everywhere and this is the first time i've come across this topic.

Dufus: thanks for RWeverything tip... its 64bit ^^

 

Am I stupid or are you wrong?

Why would your i5 be faster than his i7? I think you have made a mistake? also he has double the ram capacity.

I can't see a hdd full of data making that much difference.

 

Dell SXPS with micro stutters while gaming...

Chipset(or clock) modulation.

Download ThrottleStop and leave it reporting in the background while plaing and you will more than likely see throttling.

See here for more info