Sony might be useing 3D stacked chips to be more power effecient, have better cooling.

[vivster]

drkohler said:

vivster said:

As for 3D stacking, that has been used commercially since the PSP. Today it's mostly used in SSDs.

The memory chips in an ssd are layered, not stacked.

Nope, stacked. They are vertically connected to each other, not just layered on top of each other.

https://en.wikipedia.org/wiki/Three-dimensional_integrated_circuit#Commercial_3D_ICs_(2004%E2%80%93present)

Unless we're talking about something completely different.