# \#simulation

**URL:** https://ask.cyberinfrastructure.org/tag/simulation/280.md

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## [When using a GPU to accelerate NAMD, what are the drawbacks of using a single-precision GPU?](https://ask.cyberinfrastructure.org/t/when-using-a-gpu-to-accelerate-namd-what-are-the-drawbacks-of-using-a-single-precision-gpu/1429)

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**Author:** [@jgoodhue](https://ask.cyberinfrastructure.org/u/jgoodhue)\
**Replies:** 2\
**Last updated:** [July 27, 2020, 7:57pm UTC](https://ask.cyberinfrastructure.org/t/when-using-a-gpu-to-accelerate-namd-what-are-the-drawbacks-of-using-a-single-precision-gpu/1429 "2020-07-27T19:57:27Z")

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I see that NAMD has versions for both double precision and single precision GPUs. Single-precision GPUs are attractive because they are less expensive. Can someone say how the lower precision would affect the quality o…