Thanks to zs in Comments for pointing to a post that forensically analyzes the Onda V989 and reveals how it gets its incredible — and fraudulent — AnTuTu score [Google Translate].
So after the root, began to run antutu future use
setprop sys.quickmode 0
Forced to make it valid, a miracle happened
antutu 4.5.2 scores dropped from 55,000 to 33,000, almost halved the time to run sub-
Onda — or likely platform supplier Allwinner — modified one of the Android system files!
Note that this is with Android 4.5.2. AnTuTu X isn’t mentioned nor AnTuTu version 5 Beta 1.
But perhaps this fraud can subvert all versions of AnTuTu?
As I said regarding the fraudulent AnTuTu score of the CUBE Talk9X, this cheating is ridiculous.
This latest generation of tablets is far superior to the prior one in terms of computing strength. It doesn’t matter if the tablet is using an Intel Bay Trail, Rockchip, MediaTek, or Allwinner CPU — in most cases, people should find them to provide generally satisfactory experiences.
If all of them have AnTuTu scores generally near between 29,000-33,000, there’s really little difference between them other than what they can natively handle in terms of video playback. What becomes most important is vendor support (Android update speed), hardware build quality, and battery life.