Iris i5 4258U Game Requirement Analysis
Intel Iris i5 4258U is the Specific Version of Intel Iris Graphics 5100 Mobile that is integrated in the Core i5-4258U Processor.
The Haswell GT3 Core includes support for DirectX 11.1, OpenCL 1.2 and OpenGL 4.0. Additionally, it also offers better Decoding Performance, when compared to its Predecessors.
It equips a GPU Codenamed GT3 which offers 40 Shader Processing Units, 8 TMUs and 4 ROPs. The Central Unit Initially Runs at 200MHz and goes up to 1100MHz, in Turbo Mode.
The GPU Shares the System's RAM which varies from laptop to laptop. Typically, the GPU reserves 1GB. Depending on whether or not the system's RAM is Dual-Channeled, it can access either a 64-bit or 128-bit memory interface. The operating memory clock also depends on the at which speed the System's RAM is running and is limited by the highest operating speed that the Processor supports. In this case, it is 800MHz.
It is then obvious the Memory Bandwidth depends on a lot of factors and thus this Graphics Card performance may vary heavily from system to system.
Gaming benchmarks put its performance slightly above a dedicated GeForce GT 540M.
We recommend 4GB of RAM for a System with Iris i5 4258U.