反正人家就是稱作Unified Memory

至於你所謂"需要在CPU分配區跟GPU分配區搬來搬去"永遠看不到資料來源

下面Mark Cerny很明確點出，CPU跟GPU都可以對8GB的GDDR5進行完全尋址

那麼一份資料既然CPU跟GPU都可以去讀取，又何必搬來搬去複製成2份???

https://www.gamasutra.com/view/feat...rk_.php?print=1

"The 'supercharged' part, a lot of that comes from the use of the single unified pool of high-speed memory," said Cerny. The PS4 packs 8GB of GDDR5 RAM that's easily and fully addressable by both the CPU and GPU.

If you look at a PC, said Cerny, "if it had 8 gigabytes of memory on it, the CPU or GPU could only share about 1 percent of that memory on any given frame. That's simply a limit imposed by the speed of the PCIe. So, yes, there is substantial benefit to having a unified architecture on PS4, and it’s a very straightforward benefit that you get even on your first day of coding with the system. The growth in the system in later years will come more from having the enhanced PC GPU. And I guess that conversation gets into everything we did to enhance it."

The CPU and GPU are on a "very large single custom chip" created by AMD for Sony. "The eight Jaguar cores, the GPU and a large number of other units are all on the same die," said Cerny. The memory is not on the chip, however. Via a 256-bit bus, it communicates with the shared pool of ram at 176 GB per second.

"One thing we could have done is drop it down to 128-bit bus, which would drop the bandwidth to 88 gigabytes per second, and then have eDRAM on chip to bring the performance back up again," said Cerny. While that solution initially looked appealing to the team due to its ease of manufacturability, it was abandoned thanks to the complexity it would add for developers. "We did not want to create some kind of puzzle that the development community would have to solve in order to create their games. And so we stayed true to the philosophy of unified memory."

In fact, said Cerny, when he toured development studios asking what they wanted from the PlayStation 4, the "largest piece of feedback that we got is they wanted unified memory."

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另外老是有某些人說我捧PS捧上天

請看清楚，Unified Memory並沒有提升性能，只是方便開發

記憶體性能主要還是來自於頻寬、容量

所以PC顯卡依然可以輕鬆超越，我也認同UE5在PC上表現會更好