# Disable DDIO for a NIC

**URL:** <https://forums.developer.nvidia.com/t/disable-ddio-for-a-nic/206084>\
**Category:** InfiniBand/VPI Adapter Cards\
**Created:** [June 21, 2021, 11:38am UTC](https://forums.developer.nvidia.com/t/disable-ddio-for-a-nic/206084 "2021-06-21T11:38:27Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![1422440546](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1422440546](https://forums.developer.nvidia.com/u/1422440546)\
**Post date:** [June 21, 2021, 11:38am UTC](https://forums.developer.nvidia.com/t/disable-ddio-for-a-nic/206084/1 "2021-06-21T11:38:27Z")

</div>

Is it possible to disable DDIO for a ConnectX NIC (rather than disable DDIO for all IO devices) ?

---

<div class="post-metadata">

**Author:** ![Levei\_Luo](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/levei_luo/32/166736_2.png) [@Levei\_Luo](https://forums.developer.nvidia.com/u/Levei_Luo)\
**Post date:** [July 9, 2021, 4:53am UTC](https://forums.developer.nvidia.com/t/disable-ddio-for-a-nic/206084/2 "2021-07-09T04:53:18Z")

</div>

Hi Qiang,

Mellanox Socket Direct enables Intel® DDIO optimization on both sockets by creating a direct connection between the sockets and the adapter card.

I don’t think NIC side can disable this. What’s the purpose you want to disable it?

Maybe you can consult Intel® vendor if it can be disable for specific device.

Regards,

Levei

---

<div class="post-metadata">

**Author:** ![1422440546](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1422440546](https://forums.developer.nvidia.com/u/1422440546)\
**Post date:** [July 28, 2021, 2:46am UTC](https://forums.developer.nvidia.com/t/disable-ddio-for-a-nic/206084/3 "2021-07-28T02:46:36Z")

</div>

Thank you for your reply