Sony just announced the PlayStation 4, along with some high level system specifications. The high level specs are what we've heard for quite some time:

  • 8-core x86-64 CPU using AMD Jaguar cores (built by AMD)
  • High-end PC GPU (also built by AMD), delivering 1.84TFLOPS of performance
  • Unified 8GB of GDDR5 memory for use by both the CPU and GPU with 176GB/s of memory bandwidth
  • Large local hard drive

Details of the CPU aren't known at this point (8-cores could imply a Piledriver derived architecture, or 8 smaller Jaguar cores—the latter being more likely), but either way this will be a big step forward over the PowerPC based general purpose cores on Cell from the previous generation. I wouldn't be too put off by the lack of Intel silicon here, it's still a lot faster than what we had before and at this level price matters more than peak performance. The Intel performance advantage would have to be much larger to dramatically impact console performance. If we're talking about Jaguar cores, then there's a bigger concern long term from a single threaded performance standpoint.

Update: I've confirmed that there are 8 Jaguar based AMD CPU cores inside the PS4's APU. The CPU + GPU are on a single die. Jaguar will still likely have better performance than the PS3/Xbox 360's PowerPC cores, and it should be faster than anything ARM based out today, but there's not huge headroom going forward. While I'm happier with Sony's (and MS') CPU selection this time around, I always hoped someone would take CPU performance in a console a bit more seriously. Given the choice between spending transistors on the CPU vs. GPU, I understand that the GPU wins every time in a console—I'm just always an advocate for wanting more of both. I realize I never wrote up a piece on AMD's Jaguar architecture, so I'll likely be doing that in the not too distant future. Update: I did.

The choice of 8 cores is somewhat unique. Jaguar's default compute unit is a quad-core machine with a large shared L2 cache, it's likely that AMD placed two of these together for the PlayStation 4. The last generation of consoles saw a march towards heavily threaded machines, so it's no surprise that AMD/Sony want to continue the trend here. Clock speed is unknown, but Jaguar was good for a mild increase over its predecessor Bobcat. Given the large monolithic die, AMD and Sony may not have wanted to push frequency as high as possible in order to keep yields up and power down. While I still expect CPU performance to move forward in this generation of consoles, I was reminded of the fact that the PowerPC cores in the previous generation ran at very high frequencies. The IPC gains afforded by Jaguar have to be significant in order to make up for what will likely be a lower clock speed.

We don't know specifics of the GPU, but with it approaching 2 TFLOPS we're looking at a level of performance somewhere between a Radeon HD 7850 and 7870. Update: Sony has confirmed the actual performance of the PlayStation 4's GPU as 1.84 TFLOPS. Sony claims the GPU features 18 compute units, which if this is GCN based we'd be looking at 1152 SPs and 72 texture units. It's unclear how custom the GPU is however, so we'll have to wait for additional information to really know for sure. The highest end PC GPUs are already faster than this, but the PS4's GPU is a lot faster than the PS3's RSX which was derived from NVIDIA's G70 architecture (used in the GeForce 7800 GTX, for example). I'm quite pleased with the promised level of GPU performance with the PS4. There are obvious power and cost constraints that would keep AMD/Sony from going even higher here, but this should be a good leap forward from current gen consoles.

Outfitting the PS4 with 8GB of RAM will be great for developers, and using high-speed GDDR5 will help ensure the GPU isn't bandwidth starved. Sony promised around 176GB/s of memory bandwidth for the PS4. The lack of solid state storage isn't surprising. Hard drives still offer a dramatic advantage in cost per GB vs. an SSD. Now if it's user replaceable with an SSD that would be a nice compromise.

Leveraging Gaikai's cloud gaming technology, the PS4 will be able to act as a game server and stream the video output to a PS Vita, wirelessly. This sounds a lot like what NVIDIA is doing with Project Shield and your NVIDIA powered gaming PC. Sony referenced dedicated video encode/decode hardware that allows you to instantaneously record and share screenshots/video of gameplay. I suspect this same hardware is used in streaming your game to a PS Vita.

Backwards compatibility with PS3 games isn't guaranteed and instead will leverage cloud gaming to stream older content to the box. There's some sort of a dedicated background processor that handles uploads and downloads, and even handles updates in the background while the system is off. The PS4 also supports instant suspend/resume.

The new box heavily leverages PC hardware, which is something we're expecting from the next Xbox as well. It's interesting that this is effectively how Microsoft entered the console space back in 2001 with the original Xbox, and now both Sony and MS have returned to that philosophy with their next gen consoles in 2013. The PlayStation 4 will be available this holiday season.

I'm trying to get more details on the CPU and GPU architectures and will update as soon as I have more info.

Source: Ustream

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  • Paulman - Wednesday, February 20, 2013 - link

    AMD-based CPU's are, perhaps, a generation or more behind Intel's current-gen CPU's in many benchmarks, including gaming. Do you think AMD's poor CPU performance will be a major limitation for the PS4, or will it not matter that much (i.e. future games won't be very CPU-bound)? Reply
  • steve walther - Wednesday, February 20, 2013 - link

    Might hurt it a bit, but it depends on the clock rate or if they balance across cores properly, but with GPGPU tech being utilized, that should take a good bit of load of the CPU
    Also depends on the resolution its gonna be running at.
    Reply
  • suprem1ty - Wednesday, February 20, 2013 - link

    My bet is that it wouldn't matter much. In multi-threaded scenarios Intel tends to still be ahead of AMD, but the gap is much smaller. And seeing as how there is 8 threads available hopefully developers will start putting more effort into multi-threading their games to take full advantage. Reply
  • mga318 - Wednesday, February 20, 2013 - link

    If the GPU is between a Radeon HD 7850 and a 7870, it probably won't a problem. Reply
  • MonkeyPaw - Wednesday, February 20, 2013 - link

    I don't see it as an issue, especially considering this will be a vast leap over CellBE and the GeForce 7900-class GPU of PS3. Besides, this combo is still driving just 1080P and eventually 4K displays. I think the hardware will be more than sufficient to produce a good gaming experience. Granted, this upcoming generation of console will probably run for 10 years. Reply
  • Wreckage - Wednesday, February 20, 2013 - link

    Their GPU is also a generation behind NVIDIA's GPU. Reply
  • RussianSensation - Wednesday, February 20, 2013 - link

    You are talking about desktop GPUs. The GPU inside the PS4 is as good as it gets for the $. ~ 2 Tflops with 176GB/sec suggests a GPU that's extremely close to HD7970M. HD7970M delivers 95% of the performance of a GTX680M for $350 less:

    http://www.notebookcheck.net/Review-Update-Radeon-...

    Since you cannot fit a 200W GPU inside a console, not even a 150W one, HD7970M style GPU was hands down the best possible high-end choice for PS4. You simply cannot do better for the price/performance and power consumption right now.
    Reply
  • Guspaz - Wednesday, February 20, 2013 - link

    The original XBox 360 shipped with a 203W power supply, and the Xenos GPU was believed to have a TDP of about a hundred watts, so 150 or 200W in a console isn't impossible.

    Heck, my Shuttle XPC has a 500W PSU that's much smaller than the 360's power brick. I suspect the large size of the 360's PSU had more to do with it being passively cooled than anything else. If the PS4 (or 720) had an internal GPU that could leverage the active cooling system inside the console, fitting a 150W GPU inside the thing would not be terribly difficult.
    Reply
  • blanarahul - Thursday, February 21, 2013 - link

    I did some calculations and it seems that the APU has 256-bit wide GDDR5 memory clocked at 5500 MHz and the GPU is clocked at 800 MHz. Reply
  • blanarahul - Thursday, February 21, 2013 - link

    GPU performance should be at par with the 7850 but it is slower than 7970M. It does have higher memory bandwidth as compared to 7970M. Reply

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