2 ms·

> PCIe 7.0 x16 is limited to 242GB/sec Meanwhile the DDR4 memory in my computer is limited[1] to just 41GB/s... [1]: https://www.tomshardware.com/reviews/gski

• bayindirh 3y ago
  That's per channel. An AMD Epyc processor have 8 channels per socket, topping at 246GB/sec per socket.
  • magicalhippo 3y ago
    True, and IMHO just highlights my point, which is that PCIe 7.0 has quite insane bandwidth. After all the memory is sitting right next to the CPU, with tons of IO pins to do its work. Meanwhile the PICe device is far away and using only 16 differential pairs.
• mplewis9z 3y ago
  Yeah, but your cache throughput is already faster than PCIe 7.0 (and way lower latency), and cache replacement algorithms for modern CPUs are really, really good.