# Cambium Epmp 4500c 8x8 mu mimo **URL:** https://community.cambiumnetworks.com/t/cambium-epmp-4500c-8x8-mu-mimo/107320 **Category:** ePMP **Created:** [October 6, 2025, 7:31pm UTC](https://community.cambiumnetworks.com/t/cambium-epmp-4500c-8x8-mu-mimo/107320 "2025-10-06T19:31:21Z") **Posts on this page:** 1 **Showing post:** 10
### Author: ![Eric\_Ozrelic](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/eric_ozrelic/32/16188_2.png) [@Eric\_Ozrelic](https://community.cambiumnetworks.com/u/Eric_Ozrelic) #### Post date: [October 8, 2025, 5:59pm UTC](https://community.cambiumnetworks.com/t/cambium-epmp-4500c-8x8-mu-mimo/107320/10 "2025-10-08T17:59:43Z")
While MU-MIMO does work for flexible mode, when it was released in 5.10, its status was that of “Performance optimization is pending for Flexible TDD ratio configurations.” I’m not sure how much has been optimized since then in the newest release, 5.10.3. Eventually it will be fully optimized as it was with e3k. There are a bunch of MU-MIMO performance optimizations planned for the upcoming 5.11 firmware release. You can read about this and more in the official firmware new feature release post: > [@\[New Feature - 5.10.0\] MU-MIMO Support](https://community.cambiumnetworks.com/t/new-feature-5-10-0-mu-mimo-support/104421): > > Affected platforms: ePMP 4500C 8x8, ePMP 4500 8x8 and ePMP 4600 4x4 (ROW/FCC) Affected versions: 5.10.0 and newer The 5.10 software release introduces MU-MIMO (Multi-User Multiple Input Multiple Output) support for 5GHz and 6GHz multi-chain Access Points (APs), including ePMP 4500C 8x8, ePMP 4500 8x8, and ePMP 4600 4x4 (ROW/FCC). Simultaneous Downlink Transmission: Enables concurrent data transmission to multiple Subscriber Modules (SMs), improving sector efficiency. Configurable via Web Int… That being said, I don’t think you’ll be able to see MU-MIMO gains using the RFE horn antenna arrays. When we tried using the RFE 4x4 horn array using a ePMP 3000, we found that it did not work well at all. You can read more about my experience [HERE](https://community.cambiumnetworks.com/t/how-will-mu-mimo-work-with-rf-elements-4x4-horns/102065). You could temporarily try TDD fixed mode to see if it makes a difference in triggering MU-MIMO. --- _[View the full topic](https://community.cambiumnetworks.com/t/cambium-epmp-4500c-8x8-mu-mimo/107320)._