# PIX4Dmapper not using all 64-cores Threadripper

**URL:** <https://community.pix4d.com/t/pix4dmapper-not-using-all-64-cores-threadripper/31002>\
**Category:** PIX4Dmapper\
**Created:** [August 21, 2024, 3:20pm UTC](https://community.pix4d.com/t/pix4dmapper-not-using-all-64-cores-threadripper/31002 "2024-08-21T15:20:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![welly.gibson](https://avatars.discourse-cdn.com/v4/letter/w/c68b51/32.png) [@welly.gibson](https://community.pix4d.com/u/welly.gibson)\
**Post date:** [August 21, 2024, 3:20pm UTC](https://community.pix4d.com/t/pix4dmapper-not-using-all-64-cores-threadripper/31002/1 "2024-08-21T15:20:15Z")

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Early this year I built a 64-core Threadripper (5995WX), ASUS Pro WS WRX80E-SAGE SE WIFI II motherboard, 256GB memory, and a GeForce 4070ti. After processing multiple projects with Mapper and Matic images I discovered that both apps were only using 32 cores and 64 Threads. After several days of searching this is what I found.

To resolve this, I had to disable SMT (Symmetrical Multi-Threading) in the ASUS BIOS. With SMT disabled, the apps can now access all 64-cores, however even with the Resources and Notifications (R&N) sliders moved all the way to the right you will still only see 64 threads. I haven’t timed any processing, but it seems much faster with all 64 cores.

FYI: You don’t need a GeForce 4070ti. It has never gone above 8-10% during processes.

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**Author:** ![Andrew\_Milanes](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew\_Milanes](https://community.pix4d.com/u/Andrew_Milanes)\
**Post date:** [August 21, 2024, 11:47pm UTC](https://community.pix4d.com/t/pix4dmapper-not-using-all-64-cores-threadripper/31002/2 "2024-08-21T23:47:42Z")

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I have a 64 core Threadripper 7980x. With SMT enabled I see 70-80% CPU utilization. Better than 50%, but not 100% like I see with SMT disabled.

With SMT disabled, the max boost frequency is slightly higher too.

But I haven’t timed the two to see which one is actually faster.

I also haven’t found any photogrammetry software that will fully utilize more than 64 threads, so this isn’t a unique problem to Pix4D products.