# CalculiX and PaStiX solver Windows version

**URL:** <https://calculix.discourse.group/t/calculix-and-pastix-solver-windows-version/130>\
**Category:** Getting started\
**Created:** [August 18, 2020, 7:33am UTC](https://calculix.discourse.group/t/calculix-and-pastix-solver-windows-version/130 "2020-08-18T07:33:42Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![rafal.brzegowy](https://avatars.discourse-cdn.com/v4/letter/r/a9adbd/32.png) [@rafal.brzegowy](https://calculix.discourse.group/u/rafal.brzegowy)\
**Post date:** [September 29, 2020, 6:19am UTC](https://calculix.discourse.group/t/calculix-and-pastix-solver-windows-version/130/18 "2020-09-29T06:19:58Z")

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Please take a look:

> <https://github.com/Dhondtguido/PaStiX4CalculiX/issues/4>
>
> Hi @3rav ,
> I will try to make a version without the need of cuda (at least a compile time option).
> You don't...

My performance of factorization: 130.29 GFlop/s if I have " set OPENBLAS\_NUM\_THREADS=1"  
My performance of factorization: 19.61 GFlop/s if I have " set OPENBLAS\_NUM\_THREADS=8"

If you don’t have the “OPENBLAS\_NUM\_THREADS” at all, it takes the value from “OMP\_NUM\_THREADS”.

> <https://github.com/msys2/MINGW-packages/pull/7137>

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