ConsoleWatch: PlayStation 4 "Orbis" CPU Specs Leak, But Likely Reflect Early Hardware

ConsoleWatch: PlayStation 4 "Orbis" CPU Specs Leak, But Likely Reflect Early Hardware

Inside sources have leaked information to the press claiming that the CPU in the next-generation PS4 (codenamed Orbis) is an AMD Llano A8-3850. The chip will supposedly be paired with an AMD Radeon 7670 GPU with 1GB of integrated VRAM. With all due respect to IGN, this is the sort of report that deserves a considerably better review than they apparently gave it. Sony may well be working with that level of AMD hardware, but that's not the same as shipping said configurations.

Let's start with the APU. The A8-3850 was one of AMD's earliest Llano chips; a 100W 2.9GHz quad-core with an integrated Radeon 6550D. It didn't ship in high quantity -- AMD chose to emphasize shipping out mobile Llano's rather than their desktop counterparts. Llano is a much stronger mobile chip than it is on the desktop; AMD has been unable to scale the chip to higher clock speeds (think 3GHz+) without dramatically increasing its TDP.


One fan's idea of what the PS4 "Orbis" might look like

Llano's Achilles heel is the interconnect between its CPU and GPU; the communication channel is very similar to an old-school motherboard northbridge implementation. It's easy for the CPU to transfer data to the GPU but much more difficult for the GPU to do the same -- which means it's also much harder for AMD to take advantage of Llano's array of GPU cores as a general-purpose compute array. Bandwidth is quite limited; Llano's GPU is critically dependent on main memory bandwidth to function well.

Now, let's talk about the Radeon 7670. It's a rebranded HD 6760, based on the budget Turks 40nm GPU. According to IGN, "When the APU is paired with the HD 7670, however, Sony will be able to utilize an asymmetrical CrossFire configuration to share the load of realtime graphics processing." That's technically true, but the benefits of Hybrid Crossfire are limited to DX10/11 games (it's unclear how AMD would scale the benefit to OpenGL and older DX9 titles are often slower than they'd be with just the dGPU.) Scaling benefits are also erratic and vary significantly from game to game.

The reason we don't believe reports that Sony would adopt the Llano+6760 is that AMD has <b>much</b> better hardware either already shipping or coming in the very near future -- certainly well before the PS4's launch date. Llano may have done a great job getting AMD's foot in the door, but the chip is based on AMD's four-year-old Shanghai CPU. AMD has no plans to continue building Llano at nodes below 32nm, and console manufacturers always plan to scale a CPU through multiple process nodes. The current PS3 is produced on a 45nm/40nm process, having begun life at 90nm.

If Llano's GPU was good, Trinity's is expected to be significantly better. More importantly, its GPU is based on Cayman, which means it's a substantial improvement over the HD 5000-era part baked into Llano. Similarly, AMD might well target a budget price point for whatever GPU the PS4 eventually uses, but it probably won't be derived from a graphics architecture that'll already be three years old by the time the system ships.


AMD's next-generation roadmap for 2013. Trinity is replaced by Kaveri / Kabini

If Sony is planning to use AMD hardware in a configuration similar to what IGN describes, we expect the shipping product will almost assuredly at least use Trinity and pair it with a 28nm HD 7000 chip. What's more likely is that the final product will be built around Kaveri; the architecture AMD expects to launch in 2013. Not only would a Kaveri-derived product put Sony on par with what's shipping in the mainstream market, the enhancements coming as part of AMD's Heterogeneous System Architecture would make it much easier for system programmers to exploit the CPU/GPU dynamic to extract maximum parallelism and performance.
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Nice article Joel, I think your speculations make sense.Sony still has plenty of time to work with, plus if they go with an AMD platform it will already be well developed as a system.

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Plus it would be one hell of a shot in the arm for AMD.

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I just registered to say that was a quality informed article. Nice to get a better perspective on the technologies potentially being considered. Cheers.

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TenaciousNiplet:
I just registered to say that was a quality informed article. Nice to get a better perspective on the technologies potentially being considered. Cheers.

Welcome to our site. Lots of good reading here.

 

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I also just registered to leave a comment. Something I rarely do. Nice to see such an article written by someone who knows what the hell he's talking about.

I question the overall strategy for Sony and their PS4. Your article is written to suggest more powerful hardware which you expect Sony will use.

I believe it's very possible that Sony may not be going for expensive cutting edge hardware next gen. The news for Sony lately has been bleak. 10,000 jobs cut, losses of 6.4 billion ect.

It's at least plausible that Sony will want to ( be forced to? ) release a somewhat more humble console than many people are expecting.

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Good point Princeton, although strategically, does it really make sense for Sony to do such a thing, just to make a quick buck? Look, in the technology world, innovation = revenue. Sony has had a track record of making bad decisions over the last decade or even two decades. But the PlayStation brand has for the most part been a positive contributor to their overall success. I think its fair to say that Sony has a unique culture, and their gaming division has always been backboned by powerful, high tech hardware. Is this a compelling strategy in the ever-evolving industry? Clearly the Wii proved that graphics and glitz doesn't always win out.

Ultimately, I believe Sony will stick to creating a powerful and unique gaming console, but they will not sell at nearly the loss as they did with PlayStation 3. I look for them to innovate more this time around and really entice consumers with some new aspect of gaming that has yet to be fully explored. Sony is in a dire situation, just as you mentioned. They need to keep the PlayStation momentum strong, and even among all the rumours and news, I believe that PlayStation 4 will be a hit.

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Correction: Rebrand of a Radeon HD 6670*

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