Beyond3D Forum

AlStrong · 26-Apr-2011, 15:13

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!

iwod · 28-Apr-2011, 05:58

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?

Malo · 29-Apr-2011, 21:23

Well it was already being discussed here

http://forum.beyond3d.com/showthread.php?t=60046

26-Apr-2011, 15:13	#1
AlStrong penguins Join Date: Feb 2004 Posts: 13,979	RWT Analyzes Memory Bandwidth Implications 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! __________________

29-Apr-2011, 21:23	#3
Malo Oz Yak Join Date: Feb 2002 Location: US of A Posts: 2,512	Well it was already being discussed here http://forum.beyond3d.com/showthread.php?t=60046 __________________ Is EA still bleeding cash like an executive doing an ED-209 demonstration.... - Grall

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

28-Apr-2011, 05:58	#2
iwod Member Join Date: Jun 2004 Posts: 168	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?

Beyond3D Forum

Welcome, Unregistered.