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Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
HP Recommended

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

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

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.

View solution in original post

7 REPLIES 7
HP Recommended

I don't think there is, I am looking into it, I will post back.

 

 

HP Recommended

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.

HP Recommended

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.

HP Recommended

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 6055, HP Deskjet 1112
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
HP Recommended

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.

HP Recommended

Odd numbers are Physical, even numbers are hyperthreads, so no, you cannot disable them using msconfig.

 

All you can do is disabe a core and a hyperthread as one, now way to split them using msconfig.

HP Recommended

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 6055, HP Deskjet 1112
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
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