When you will buy a Android smartphone that really needed to check their performance first, like as Processor/CPU, GPU, RAM, Screen, and Battery.
Because of the Android is the OS which need large power. exp; Android with Single Core Processor 1 GHz RAM 512 MB that will slowly/lag sometimes. Lot of RAM in the Android will be cut by the System/Kernel Android.
For example : 512 of RAM will be left 350-400 MB, 1 GB of RAM will left 800 MB
The different think with OS Symbian, that will consumed less power, Symbian can running well although 600 MHz of processor and 128/256 MB of RAM.
But unfortunately the support for the OS Symbian has been stopped.
Lets back to the topic.
When you will buy the android smartphone for the high performance for the games HD app, you should pay your attention for some specification:
PROCESSOR WITH RAM
-Processor Dual Core = RAM minimal 512
MB
-Processor Quad Core = RAM minimal 1 GB
SCREEN RESOLUTION WITH PROCESSOR
-WVGA (480x800) = Min Single Core 1
GHz (*Dual Core is better)
-qHD (540x960) = Min Dual Core 1.2
GHz
-HD (720x1280) = Min Dual Core 1.2
GHz
-Full HD (1080x1920) = Minimal Quad Core
SCREEN RESOLUTION WITH GPU
-HVGA (320x480) = Minimal memakai GPU
Adreno 200-205
-WVGA (480x800) = Min USE GPU Adreno 205 / PowerVR SGGX 531 /Mali400 / PowerVR 540
-HD (720x1280) = Min USE GPU Adreno 220-225
-Full HD (1080x1920) = Minimal use GPU Adreno 320
Best GPU list :
Adreno 420 > Nvidia
Tegra 4 > Adreno 330 > PowerVR G6430 > PowerVR
SGX544mp3 > Adreno 320 > Nvidia Tegra 3 > Mali Tx/
Mali-T604 > PowerVR SGX544 > Mali 400 MP4
Adreno 305 > PowerVR SGX 543 > Adreno 225 >
VideoCore IV HW > Adreno 220 > Nvidia Tegra 2 >
PowerVR SGX 540, 535,531 > Adreno 205 > Adreno
203 > Adreno 200 > SGX530