riderz13371 said: 4.5 GB GDDR5 of ram for games? Honestly even this is too much considering it's GDDR5 and not DDR3. I don't think devs (specifically multi platform devs) would have taken advantage of the so called "7 GB ram for games" so it would have just been a waste. Better to put some more on the OS to make it super quick. 3.5 GB of GDDR5 for the OS this thing is gonna be lightning speed lol!
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RAM-speed and the amount of RAM are used for different things, one doesn't offset the other. The RAM-speed can be used if data is manipulated or copied in RAM. So for calculation. A strategy-game with many independent agents can make use of the RAM-speed. Think Pikmin or Starcraft. You could calculate more elements in the same timeframe. Also image or video-manipulation can make use of it. I don't think the shaders change the data in RAM though, they process the image for output. It would help transferring data fast between GPU-memory and main-memory, but PS4 uses unified memory, so no need for this. Transferring data from and to Harddisk and BluRay, then the harddisk and BluRay are the limiting factor, every RAM will be fast enough for that. Faster RAM could help a lot for calculation of polygons and physics. It also helps if compressed textures are decompressed on the fly.
The amount of RAM makes higher-res textures possible and reduces popup in open-world-game (as more stuff can already be preloaded). This will suffer if OS uses up more RAM.
The speed of the RAM probably helps the most for the video-sharing feature, because that needs on the fly encoding of the video-data. Probably that share-feature is the reason for GDDR5. Anyways, the speed will help some games as I pointed out, but it doesn't offset the pure amount of RAM, that helps other game-features.
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