# Select devices for V-Ray GPU rendering.

**URL:** <https://forums.chaos.com/t/select-devices-for-v-ray-gpu-rendering/103933>\
**Category:** General\
**Created:** [March 17, 2021, 4:10pm UTC](https://forums.chaos.com/t/select-devices-for-v-ray-gpu-rendering/103933 "2021-03-17T16:10:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Karol.Osinski](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/karol.osinski/32/40361_2.png) [@Karol.Osinski](https://forums.chaos.com/u/Karol.Osinski)\
**Post date:** [March 17, 2021, 4:10pm UTC](https://forums.chaos.com/t/select-devices-for-v-ray-gpu-rendering/103933/1 "2021-03-17T16:10:19Z")

</div>

Hi, I want to add slave’s cpu the list of GPU devices use them in CUDA mode. I updated the list and restarted the machine but it seems that sill only GPU’s are used. Do I have to restart the V-Ray GPU render server manually somehow?