Our friends at RealWorldTech have put out a new article taking a look at memory bandwidth and its relevance to GPU performance: "Memory bandwidth is a critical to feeding the shader arrays in programmable GPUs. We show that memory is an integral part of a good performance model and can easily impact graphics by 40% or more. The implications are important for upcoming integrated graphics, such as AMD’s Llano and Intel’s Ivy." It's a pretty interesting analysis with a wide variety of GPUs referenced from AMD and nVidia. Check it out!
No one reply? Strange. To summarize, Assuming Drivers plays the +- 5% difference in test, an actual GFLOPS output / Bandwidth Performance Numbers actually gives a VERY accurate results of the GPU performance. But it doesn't take into account the amount of memory with GFX card. With 22nm and 3D Package, Intel could literally stack 64MB of L3 Cache offering ~300GB/s of bandwidth to its iGPU. Of coz since the iGPU has low number of GFlops, it doesn't require that much bandwidth. But would these excess bandwidth help with the lower amount of memory?