WhatMeWorry wrote:I keep wondering why AMD just doesn't slap a CPU and GPU architecture on the same die?
As others have stated - It is already happening
A 7750 has 72 GB/s of memory bandwidth, all dedicated to the GPU. The CPUs in the target market for integrated graphics have 16-20 GB/s, and it's shared between the cpu and the gpu.
WhatMeWorry wrote:Oh. There must be a (very large) gap in my understanding. So the 72 GB/s is over the bus? That would be a PCIe bus?
WhatMeWorry wrote:And are both these 72 GB/s and 16-20 GB/s interfaces communicating with the DRAM? I'm leaving out the Video memory on the discrete graphics card for simplicity. (That's mainly for texture and screen buffering?)
cynan wrote:Since an entirely new motherboard socket would need to be designed anyway, there is no reason AMD couldn't keep high speed frame buffer memory separate from system memory on the motherboard.
codedivine wrote:An alternative possibility is to look at GPU architectures that require less memory bandwidth. Tile based renderers might help?
just brew it! wrote:codedivine wrote:An alternative possibility is to look at GPU architectures that require less memory bandwidth. Tile based renderers might help?
Possibly. I am not certain by how much (if any) tile-based rendering reduces memory bandwidth requirements.
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