PlayStation 4 has a secondary processor with 256 MB dedicated RAM

PlayStation 4 secondary chip

By now we all know that the PlayStation 4 features an AMD CPU+GPU, with 8 GB of RAM. But recent teardowns of the console have revealed that the PlayStation 4 has a secondary processor, a co-CPU, with its own dedicated RAM.

The secondary processor, known as SCEI CXD90025G, is based on the ARM architecture, common in smartphones and other smaller devices. It has its own dedicated ram — 256 MB of DDR3 SDRAM memory.

This is the processor that likely deals with all the background tasks, such as downloading, streaming live gameplay videos, and more. In addition, it has 256 MB of flash storage on the board as well. We’ve previously reported that the PlayStation 4 also features a hardware upscaler chip, to upscale content up to 1080p.

As mentioned before, the secondary CPU deals with minor tasks such as downloads, voice chat, and video transcoding. All of that frees up resources from the main CPU, which is used for games.

It’s interesting to see how far we’ve come in just one console generation. Consider that the PS3 had 256 MB of main system memory. Now that same amount is used just for background tasks in the PlayStation 4. We can only imagine how things will be in the PS5…

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  • Gilbert Nicks

    that is awesome… I just dont like the cooling set up…

  • Gamer Mania

    So the PS4 has:
    2GB of DDR3 SDRAM
    8GB of GDDR5 RAM

    So overall the console has 10GB of RAM… damn… I know the 2GB is for the other RAM but damn the PS4 is packing some firer power

    • Morris ヅ

      256 MB of DDR3 SDRAM not 2GB

  • DiFiasco

    It’s ‘Azure’ in chip form – BAM!

    • Hugo Stiglitz

      Azure can’t come close to that. 256 MB of RAM unless you have a 2 gb/s connection.

      Internet connections are measured in megabits, not megabytes. RAM is measured in megabytes. So just for Azure to match this chips RAM alone, you would need to have a 2048 Mbps internet connection (8 bits in a byte, 256 MB in megabits is 2048) LOL

      Even gigabit connections are only in Kansas City right now, let alone 2 gigabit. And that’s only one component of data transfer going on with that chip let alone being able to fully match it.

      The whole cloud power crap is a pipe dream as long as the internet is as slow as it is

      • DiFiasco

        Actually, Carmack would disagree although there is only so much you can do on an unstable connection. The real issue is that most connections are heavily contended – so while they achieve a certain speed over time, that is not necessarily true at a moments notice when the game actually needs it. As such, all studios can’t really count on Azure as part of their application resources and any additional functionality is added in as a bonus.

  • Gabrielsp85

    we know about the secondary chip since February, it is used for the backgrounds and idle downloads


    Yes! is a very powerfu l!!!

  • Rinslowe

    Likely to look after background tasks as mentioned + security.

  • Hugo Stiglitz

    Man that is so cool. That secondary processor is no joke. No wonder gameplay isn’t even remotely affected by gameplay recording or live streaming. Sick.