Review: X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM

By | March 14, 2020

Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM

The X99 is an Android TV Box built to play high resolution 4K UHD videos as well as games and other media.

It comes with some impressive hardware with the fast RK3399 CPU and 4GB of DDR3 RAM.

The RK3399 CPU is currently one of the fastest built for Android Boxes and has come down in price recently.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Power On Close
This gives it some good hardware which I ran some test on below to see how well it performed.

*This unit was sent to me to review with my honest opinion and results below.

CPU: RK3399
GPU: ARM Mali-T860MP4
Operating System: Android 7.1
Bluetooth 4.1
Dual Band 802.11ac WiFi

The package comes with the box, power supply, HDMI cable, remote control, and user manual.
Review X99 Android TV BOX RK3399 4GB RAM 32GB ROM ALL

The side has a SIM slot, Micro-SD, USB 2.0, and a USB 3.0 port.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM SIDE

The back has a Type-C port, SPDIF, HDMI, Ethernet, and power port.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM BACK

The remote control is a combination air mouse with a small dongle in the battery pack that needs to be plugged into the box.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Remote
The remote also has a voice button which is a nice feature.

Powering the box on a clock displays on the front along with a power light.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Power On Close

The box comes to a basic setup menu with Language, Screen, WiFi, Launcher, and Remote Control.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Power On

The Launcher is standard with basic Apps installed such as YouTube, Play Store, Netflix and so on.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Luancher 1

Kodi does not come installed which is easy to do from the Play Store.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Kodi
I installed Kodi which used very little resources in System Info.

I also installed some of the current top add-ons which it had no problems with.

Testing the unit with Netflix it would only play standard definition due to Netflix restrictions.
Review X96 Android TV Box Amlogic S905W 2GB RAM Netflix
Netflix requires a box be certified or it will only play 480p and not HD resolution.

While the X99 has the hardware to play HD 4K video Netflix streams will play at only standard definition.

Testing the WiFi I used Ookla App which gave some impressive results at 163Mbps Download, and 21Mbps Upload.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM Wifi Speed Test

Running AnTuTu Benchmark Version 6.2.6 gave an overall score of 76606.

UPDATE: Others having been getting different AnTuTu scores ranging from 60000-70000. This is likely due to AnTuTu recent updates. Version 6.2.6 was used for testing with no Apps running in the background.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM ANTUTU
Other scores are 3D: 1507, UX: 33855, CPU: 23427, RAM: 3817.

I used 4K YouTube videos to test the video resolution and it had no problems playing any 4K UHD videos even at 60fps.
Review X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM 4K test

The X99 comes with some nice hardware for streaming videos and did not disappoint.

The AnTUTU score of 76606 is very good even higher than the Fire TV without the restrictions.

It will have no problem running Kodi, Netflix or most any other video streaming App.

I am still testing the unit so far with good results and will update if anything changes.

As always be sure to read the reviews on Amazon, forums, or elsewhere to be sure a unit is a good fit for you.

28 thoughts on “Review: X99 4K Android TV BOX RK3399 4GB RAM 32GB ROM

  1. Bill S.

    After getting my X99 box, it set up and ran flawlessly until my airmouse remote quit and could not be paired to the unit. Since getting a replacement airmouse remote there are no problems and this unit runs perfectly, with very fast downloading. The extra RAM really comes in handy if you have a lot of apps and you can do a lot more customization on this box than Nvidia Shield with just about the same level of performance. I’d recommend this box as a streamer over just about anything else out there other than Nvidia Shield.

  2. Quantum

    Bought this X99 android TV Bo, 5 weeks ag, to connected on 40 ” Samsung, smart TV, newer started to work.. cheers.. Quantum..

  3. Rohan Wirasinha

    I have a problem with my X99. The system knocks off after a few minutes, and then the remote wont work. I have to pull the power plug out to restart and the same problem happens after a few minutes. Is rthis a hardware problem or a software problem and any software fixes??

    Would appreciate assistance

    Thanks RohanW

  4. 1bit

    AVOID THE BOX = the Rockchip chipset can not handle 4K @ 60p or 50p, the screen flickers, also on other frame rates I get micro-stuttering on streaming on ALL apps, some worse than others, after doing weeks of research it turns out that Rockchip chipsets are extremely poor and to be avoided at all costs

  5. Mel

    Hi there, does the sim slot really work? Because the sim slot on my X99 is way too big to fit any type of sim that’s available in the market!

  6. Eric Dunn

    I have a x99 box. When I put a build on it it works fine,turn it off and return later and switch it on again it is on kodi . The build is still in repositories but I have to reload it .I do notice after reloading the build if I put it back to kodi and turn it off then turn it on again it comes back on my build.Any clues .
    Regards Eric

  7. Chaz

    X99 is the best box. It flies & it uses 64bit kodi.
    It has a bad fork installed. Either reset box or install Chief Kodi 64bit build. It will solve all your issues.
    You can side load 4k Netflix. You can side load just about anything. The box is sweet. Not for Lammers

  8. Mayko Cardoso

    Se não houver uma grande atualização para esta caixa x99
    Perderá dinheiro pelos seus problemas.

  9. Pielle

    To be hornets 60000 is very very low. Must be something wrong with your box.

  10. John

    Hello Guys,

    I have the same Android TV Box „X99 Max 3399 with Android 7.1.2“.

    I have change all the Screen Resolutions from „Auto till 4096x2160p“ also with Other HDMI Cable, from 2.0/2.0a and 2.0b. But almost Every „4K HDR“ Movies that i want to Play with it, it do NOT PLAY with Real „HDR or HLG“.
    I have a LG OLEDC6D with HDR, HDR10, HLG and Dolby Vision.
    With my Other Android Device „NVIDIA SHIELD TV“ and i have a „Minix U9“ and Both „CAN Play Real HDR and HLG“. But with this „X99 3399 Android Box“ i can‘t Play HDR or HLG Movies.

    If some of you have any Solutions „HOW I CAN PLAY 4K HDR & HLG Movies“ Please Reply/Help me.

    Thanks in Advance

  11. Chaz

    People its not the rock chip its the build with a bad fork installed. You can try to reset box as soon as you get it cause I think some Chinese guy put a fork on box after mfg. Or install Chef Kodi 64 bit or install a different fork yourself. I would reset via botton in back. Worked on my X99 box which flies! Really fast box with no problems. S912 cpu is nicer but only 32 bit builds are out.

  12. Aua

    Has anybody succeeded to install Smart IPTV on the X99-box. If you have please tell me how, thanks, Aua

    1. Chaz

      I told you guys the x99 has a BAD fork installed which is why when you reboot it reverts back. Go find Chief Kodi Build install that it will install a new fork! Problem solved!

  13. Hmm

    I have given up on these Android boxes and Gearbest as well. I will only buy locally where I can return the item without hassle. From my experience, there’s too many counterfeit and cheap chipsets that render the box useless. Most recently, I had a bad with the H96 Pro+ by Alfawise. Reviews seemed good until I googled the issues I was having. Then all sorts of issues popped up. Instructions to reinstall the factory firmware are lacking too and you need to take the box apart to see what chipset there is.

    I’m done with these Android boxes. I will only buy a premium Android Box like Evpad or use my laptop connected to my TV.

    1. Dellboy

      Hahha ha evepad is Chinese like the rest off them only box that’s not Chinese but then again it’s made to the company’s specs is the Nvidia shield all other boxes are Chinese especially evebox as it comes with Chinese channels installed

  14. John

    I am having a problem with kodi. It will load a build and appear to run fine, but after a day or so, kodi loses the build info and reverts to a first run state. Also happens on a power cycle.

    I also have an H96 Max with the same build, 7.1.2. It does the same thing with kodi, so I am thinking this is maybe an rk3399 platform problem.

    Another disappointment is middling antutu scores in the low 60000 range. I am going to experiment with some cooking techniques to see if it is a thermal related issue.

    Another problem is losing setups on alternative launchers like nova. It will appear to set up fine, but after a few starts will lose the widgets and I have to start over. I do not recommend this box. The H96 Max is much faster with fewer bugs.

    1. Can Ozyman


      Its totally true and agreed with you
      Dont buy this unit ever!
      For KODI(even 17.6 or 18.0)useless! such as if you power-off unit than you will loose all your installed
      Kodi addons! so you wont do it power-off with this device;like a “joke”!

      First I’v tried to load BUILD but when I’v power-off than all addons gone for ever!
      Second time I’v installed couple of Addons(such NeptuneRising and MagicDragon)then when
      I did power-off device than lost/deleted all my addons again!

      So this device never work stable with any Kodi version too
      Kodi still remain but your all addons lost so never power-off this device!

      Seems that RK3399 does not stable work with Kodi!

      Device also very hot!

      There is a lot of BUGs!

      Need a big updating/upgrade

      1. Oscar Aguilar

        I have a X99 with the same problem as you.
        Kodi 17.6 does not work.
        Avery time I disconnect the box from the power supply, I loose everything that I have installed on Kodi.
        This box has a serious problem and I hope there is a upgrade to fix this problem.

        1. Jim

          You’re right when using kodi 17.6 powering off you will lose all add ons. I installed XBMC 18, which is essentially kodi 18, and I can power off the box no problem all my add ons and data remain now my box works great.

            1. TheAce

              Bit surprised to read all the negative comments about my box and setup. I have H96 Pro+ with Kodi 17.6. Never a problem. Switched off every night, on again every evening, no loss of addons or selected favourites. I did install a ‘magic’ rebuild which I hated, so uninstalled Kodi, reinstalled 17.6 and had to redo all my addons and favourites. Absolutely no problems. I’d recommend to anybody.

  15. G

    Hi, Thanks for sharing with us.
    I have some questions…
    Can X99 play 4K HDR?
    Does X99 have HDMI 2.0a?

    Thank you!

  16. Riaz Ansari

    Hi,I like your links and it help me a lot.
    If you find any way to addon zemtv for desi programs. I will appreciate your help.

    1. S

      Hey, try search for it in the search bar. Great site


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