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- Re: Disable Hyperthreading - DV^-2005TX

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07-03-2011 05:26 PM
Hello,
Can someone please tell me how to disable Hyperthreading on my DVR-2005TX laptop. There is no option in the BIOS to do this. I am running the latest Insyde bios for this machine.
Kind Regards
Chris Grisdale
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Accepted Solutions
07-03-2011 06:56 PM
Yeah, HP bios's suck.
No answers yet, I am thinking it is impossible to do outside of the bios. I will post if anything turn up.
07-03-2011 06:28 PM
Awesome thanks. I have an i7 and it seems a bit of a waste having 8 cores when all I do is game so I would rather disable HT and get slightly better performance.
I've looked into Insyde bios modding but my laptops out of warranty so I dont want to risk bricking it just to disable this basic feature. No idea why this isant a built in feature to enable/disable.
07-03-2011 08:19 PM - edited 07-03-2011 09:00 PM
HI,
You might try this:
Open the run Window and enter MSCONFIG
Then go to the boot tab ---> advanced options. Reduce the number of processors down to number of real processors in your PC. If you have a dual core processor and HT is active then the number of processors will be 4.
This will not disable the bios support for HT but it will reduce the number of processors available for dispatching.
I did try the above on a quad core with HT active while I was in the process of debugging an issue. This only cut out the virtual thread and not one of the real processors. I haven't tried it on a dual core.
Look in Task Manager under Performance and make sure that the "real" processors are not disabled.
HP Envy 17", i7-8550u,16GB, 512GB NVMe, 4K screen, Windows 11 x64
Custom PC - Z690, i9-12900K, 32GB DDR5 5600, dual 512 GB NVMe, gen4 2 TB m.2 SSD, 4K screen, OC'd to 5 Ghz, NVIDIA 3080 10GB
07-04-2011 04:24 PM
Awesome thanks ill try this tonight.
Is there an easy way to tell if its displaying virtual/physical processors? I came across this method while i've been trying to find a way to disable HT but I was scared it would disable some physical cores vs virtual ones.
07-04-2011 08:40 PM
You might be able to knock off one logical processor but more than that will probably disable a core. I have disabled one logical and not a core.
The bios passes the number of logical processors to the Windows OS in a table of information. You would need to develop a patch to modify that table and envoke the code at the time Windows before starts to examine the table. This is not impossible but I don't recommend that you even think about doing it.
HP Envy 17", i7-8550u,16GB, 512GB NVMe, 4K screen, Windows 11 x64
Custom PC - Z690, i9-12900K, 32GB DDR5 5600, dual 512 GB NVMe, gen4 2 TB m.2 SSD, 4K screen, OC'd to 5 Ghz, NVIDIA 3080 10GB
