# Are update gpu flag and md-vv integrator compatibles in current version?

**URL:** <https://gromacs.bioexcel.eu/t/are-update-gpu-flag-and-md-vv-integrator-compatibles-in-current-version/5139>\
**Category:** User discussions\
**Tags:** gpu\
**Created:** [October 31, 2022, 3:33pm UTC](https://gromacs.bioexcel.eu/t/are-update-gpu-flag-and-md-vv-integrator-compatibles-in-current-version/5139 "2022-10-31T15:33:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![amleon](https://avatars.discourse-cdn.com/v4/letter/a/9e8a1a/32.png) [@amleon](https://gromacs.bioexcel.eu/u/amleon)\
**Post date:** [October 31, 2022, 3:33pm UTC](https://gromacs.bioexcel.eu/t/are-update-gpu-flag-and-md-vv-integrator-compatibles-in-current-version/5139/1 "2022-10-31T15:33:30Z")

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Hi, just a small question. On version GROMACS v.2021.1, `-update gpu` flag and the integrator `md-vv` were not compatible. Are they compatible in current version?

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**Author:** ![al42and](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/al42and/32/1393_2.png) [@al42and](https://gromacs.bioexcel.eu/u/al42and)\
**Post date:** [October 31, 2022, 8:09pm UTC](https://gromacs.bioexcel.eu/t/are-update-gpu-flag-and-md-vv-integrator-compatibles-in-current-version/5139/2 "2022-10-31T20:09:29Z")

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Hi @amleon.

Unfortunately, only `md` (leap-frog) integrator is supported with GPU update in GROMACS 2022 and the upcoming 2023.

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**Author:** ![jochenhub](https://avatars.discourse-cdn.com/v4/letter/j/977dab/32.png) [@jochenhub](https://gromacs.bioexcel.eu/u/jochenhub)\
**Post date:** [January 16, 2023, 9:06am UTC](https://gromacs.bioexcel.eu/t/are-update-gpu-flag-and-md-vv-integrator-compatibles-in-current-version/5139/3 "2023-01-16T09:06:27Z")

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Hi Gromacs team,

if you have slots free in the wish list for 2024, support for md-vv with update on the GPU would be great for more efficient simulated tempering simulations. An alternative would of course be to support simulated tempering with integrator=md.

Many thanks, Jochen