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Intrinsic on 23 February 2018
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KBG29 said:

I would much rather see them go with 1TB of M.2 NVMe storage, with the ability for us to upgrade. I also think they should only support external SSD due to speed requirements. It will be a slight hit in 2020 or 2021, but SSD price will fall very fast and capacity will make leaps. If they don't stick it in, it opens the door to other companies to make much more capable boxes and have a generational leap over PS5 within a year or two of release.

Well, two things to consider here....

  1. Games don't really benefit that much from a faster Drive beyond a point. Like if you look at a PC running a game from a Sata 3 SSD (~550MB/s) and a M.2 NVME (~2GB/s), the game loading times remain practically identical. Maybe a second or two edge in favor of the M.2 drive. So there isn't any reason to prioritize putting in an NVMe or even an m.2 interface in a console.  

  2. The cost of an SSD, makes no sense throwing in a storage format but be strapped on pricing so much that it ends up becoming a nuisance.
Having said all that though, Its cheaper to build the technology of what would have been an NVMe m.2 drive (albeit custom) right onto the MB itself. That way, they can throw in their own controller and a specific amount of nand flash chips, say 240GB/480GB/720GB and have an on board solution that can hit speeds of 1500MB/s and up. Knowing fully well that if anyone wants extra space they could just plug in an external drive. This is kinda the best of both worlds. My money would be on 1TB on board nand flash storage.
EricHiggin said:

1. I thought PS4 was solely GDDR5. That would make more sense why Pro went that route then. Would also make me think a separate 4GB of DDR4 might be more likely in PS5. You learn something new everyday. I would think 16GB for GPU would be a definite, maybe 20GB. 24GB + 4GB seems too much.

2. Good points. Maybe 256GB flash plus 2TB HDD for base PS5, and 1TB flash and no drive for Pro? Base users will still mostly want a complete package out of the box I think, but Pro users should be able to add an external drive without issue, and possibly internal depending on the Pro case design.

  1.  Not only did it have an extra GDDR3 256MB or ram, it also had a low power ARM processor. And yh, 24GB of GDDR6 definately seems too much. But I could see 16GB-20GB and anything as much as 4-8GB of LPDDR4 ram to replace what is currently 1GB of DDR3 ram in the PS4pro but this time around not touch the App Ram and have the OS only use the LPDDR4 ram

  2. Well, the NS got away with having just 32GB flash in the console. I think things like that would make sony and MS think a little out of the box too. It honestly won't surprise me if they just went with 480GB-960GB on board flash and call it a day. If you want more storage plug in an external drive. And on the flip side, doing away with any accomodations for an internal HDD simplifies the design and gives them more room for cooling.