The Outlook On AMD's Fusion Plans

PreacherTom writes "Now that AMD's acquisition of ATI is complete, what do the cards hold for the parent company? According to most experts, it's a promising outlook for AMD . One of the brightest stars in AMD's future could be the Fusion program, which will 'fuse' AMD's CPUs with ATI's GPUs (graphics processing units) in a single, unified processor. The product is expected to debut in late 2007 or early 2008. Fusion brings a hopes of energy efficiency, with the CPU and GPU residing on a single chip. Fusion chips could also ease the impact on users who plan to use Windows Vista with Aero, an advanced interface that will only run on computers that can handle a heavy graphics load. Lastly, the tight architecture provided by Fusion could lead to a new set of small, compelling devices that can handle rich media."

Comments

Maybe...

[MobyDisk]

The article says that this might be attractive to businesses: I can see that since most businesses don't care about graphics. This is similar to businesses buying computers with cheap on-board video cards. But that means they will be profiting on the low-end. It seems like this is more of a boon for laptops and consoles: Currently, laptops with decent video cards are expensive and power-hungry. Same with consoles. But for mid-range and high-end systems, there must be a modular bus connecting these two parts since they are likely to evolve at different rates, and likely to be swapped-out individually.

Re:this will fail

[NSIM]

Do you really want to have to replace an entire system when you upgrade? You buy a Dell, a new game comes out 6 months and your system can't play it reasonably well. So then you either a) buy a new system or b) gut in a video card and not use the one on the proc.

Integrating the GPU with the CPU will be about driving down cost and power consumption, not something that is usually a high-priority for folks that want to run the latest greatest games and get all the shiniest graphics. So, I'd be very surprised if this is intended to hit that part of the market, more likely it's designed to address the same market segment that Intel hits with graphics embedded in the CPU's supporting chipset.

That said, having the CPU & GPU combined (from the point of view of register and memory access etc) might open up some interesting new possibilities of using the the power of the GPU for certain non-graphic functions.

Back in the day at Intergraph we had a graphics processor that could be combined with a very expensive (and for the time powerful) dedicated floating point array processor. To demonstrate the power of that add-on somebody handcoded an implementation of the Mandelbrot Fractal algorithm on the add-on and it was blistering fast. I can imagine similar highly-parallelized algorithms doing very well on a GPU/CPU combo.

Re:Heat???

[Pulzar]

Although CPUs have gotten better in the past year, GPUs (particularly ATI's) still keep outdoing each other in just how much power they can suck.

You're talking about the high-end "do everything you can" GPUs... ATI is dominating the (discrete) mobile GPU industry because their mobile GPUs use so little power. Integrating (well) one of those into a CPU should still result in a low-power chip.

Re:It's for laptops and budget systems

[modeless]

I highly doubt AMD is planning on using combined CPU/GPU solutions on their mainstream desktop parts, and they are absolutely not going to do so for server parts

I think they are, and I think it's the right choice. The GPU that will be integrated will not be today's GPU, but a much more general processor. Look at NVidia's G80 for the beginning of this trend; they're adding non-graphics-oriented features like integer math, bitwise operations, and soon double-precision floating point. G80 has 128 (!) fully general-purpose SISD (not SIMD) cores, and soon with their CUDA API you will be able to run C code on them directly instead of hacking it up through DirectX or OpenGL.

AMD's Fusion will likely look a lot more like a Cell processor than, say, Opteron + X1900 on the same die. ATI is very serious about doing more than graphics: look at their CTM initiative (now in closed beta); they are doing the previously unthinkable and publishing the *machine language* for their shader engines! They want businesses to adopt this in a big way. And it makes a lot of sense: with a GPU this close to the CPU, you can start accelerating tons of things, from scientific calculations to SQL queries. Basically *anything* that is parallelizable can benefit.

I see this as nothing less than the future of desktop processors. One or two x86 cores for legacy code, and literally hundreds of simpler cores for sheer calculation power. Forget about games, this is much bigger than that. These chips will do things that are simply impossible for today's processors. AMD and Intel should both be jumping to implement this new paradigm, because it sets the stage for a whole new round of increasing performance and hardware upgrades. The next few years will be an exciting time for the processor business.