Why do you need to download a separate 3DBench App?
-- The separate 3DBench app is to avoid re-downloading 3D part when version updated. Save your mobile data!
-- To test the 64 bit CPU and UX performance we need a separate 3DBench app

NOTE:
In order to more realistically simulate future game scenarios, we used the Vulkan engine API and ultra-high-precision textures and lighting effects in the new Terracotta Warriors scene. that resulting in a Antutu 3Dbench installation package size almost equal to a real 3D game, about 600MB. Therefore, we recommend that you download it only when using a WIFI network to avoid wasting data traffic.

We noticed that some devices can't run the Terracotta Warriors scene because those devices can't get vulkan support. In the future, we will be launching an Antutu Go version without vulkan scenes for these devices. please wait.
From version Antutu 3DBench 8.1.1:
Fix Fisheye stuck on some devices
Variant
Arch
Version
DPI
(universal)
Latest: 8.1.1 on January 5, 2020
(x86)
Latest: 6.0.3 on January 1, 2016
All versions
December 24, 2019
December 18, 2019
December 2, 2019
December 21, 2018
July 16, 2018
January 30, 2018
December 30, 2017