Comment by aurareturn
Comment by aurareturn 8 days ago
If I can summarize what you wrote: Same IPC gain as normal Zen5 but more power can be drawn to increase performance due to moving the cache chiplet to the bottom.
Comment by aurareturn 8 days ago
If I can summarize what you wrote: Same IPC gain as normal Zen5 but more power can be drawn to increase performance due to moving the cache chiplet to the bottom.
The previous 3D cache solutions were not just limited thermally, but also the cache chiplet could not tolerate the high voltages that AMD's CPU cores use at high frequencies. Even with excellent cooling, you weren't going to get a 7800X3D or 5800X3D to match frequencies with the non-3D parts. (This might have been less of a problem if AMD could put the extra cache on a different power rail, but that's hard to retrofit into an existing CPU socket.) This new cache chiplet still has a lower voltage limit than the CPU cores, but it's not as big a disparity.