Acer Z520 is a high-end smartphone made by Acer Inc. much slimmer than IPhone 4. Its hardware was 1.3 GHz Mediatek MT6582 quad core, 2.3 GHz dual-core NVIDIA Tegra Denver or 1.4 GHz Qualcomm Snapdragon 320 and can underclock to 1.2 GHz (for MTK Only) and the graphics was ARM Mali-400, ULP GeForce with tesselation, instant rendering and vertex array object from OpenGL ES 3.0, or else Adreno 320. For Liquid variant, it uses 1.6 GHz dual core Intel Atom with PowerVR SGX 544MP2. RAM is 1 GB and in Liquid 2 GB.