Unreal Engine 5 is being optimized for 60fps
Epic China says you don't need PS5's SSD to run the demo, decent SSDs will do just fine.
Dunno if I have a decent SSD in my gaming laptop, this is what it can do
Only half as fast as the PS5 SSD in raw speed under optimal conditions.
Of course PS5 can also benefit from compression upping the data rate to 9 GB/S while directly reading into video memory.
For some reason my SSD suffers greatly from random access, perhaps that's normal or a windows thing?
It's much faster than the HDD at least which has it's own quirks. (Why is writing faster than reading?)
But it's obvious that random access is a death sentence for HDDs.
Anyway if this is a decent SSD (I don't know) then the ps5 is at least 3 times faster and can bypass reading things first to normal ram to transfer them through to vram afterwards.
It's kinda mind blowing that laptop SSDs less than 10 year old were not that much better than HDDs. My 2011 MacBook Air had read speed just around 120MB/s but it was one of the first laptops that adopted SSD as far as I remember.