Ps5 ram allocation. The ps5 gddr6 ram memory bandwidth clocks in at a super quick 448gbsec which is much faster than the 176gbsec that the 8gb of gddr5 ram within ps4 is clocked at. So for the critical bandwidth dependent scenarios xbox ram would outperform ps5. On the other hand sonys playstation 5 ram pool is 16gb gddr6 on a 256 bit bus.
The ps5 chip is apparantly still using multiples of 8 shader units so it makes sense to keep ram to multiples of 8 as well. When it comes to ps5 vs xbox series x this gives playstation 5 a noticeable lead. With a fast ssd than can supposedly push 4 gb of data to ram every second there are diminishing returns for more ram.
Xbox series x ram vs playstation 5 ram. So they will put in 16 gb gddr6 and another 4 gb ddr4 just for the os. Microsofts xbox series x ramn pool is a sizable 16 gb gddr6 on a 320mb bus.
It can be argued that this split ram config is more optimized as compared to an average speed 448gbs 16gb ram because ps5 would allocate same capacity ram to different operations which have different bandwidth requirements. As delightfully confirmed by mark cerny during his ps5 livestream broadcast we now know that the ps5 will boast 16gb of gddr6 system ram that will provide 448 gbsec of bandwidth.