4 ms·
I don't get it. The point of (ddrN) memory is latency. If its on the far side of pcie latency is much worse than the system memory. In what sense is this better
by JonChesterfield 1y ago
I don't get it. The point of (ddrN) memory is latency. If its on the far side of pcie latency is much worse than the system memory. In what sense is this better than ssd on the far side of pcie?
- wmf 1y agoIt's only ~2x worse latency than main memory but 100x lower than SSD.
- JonChesterfield 1y agoI'm finding ~50ns best case for pcie, ~10ns for system. Which is a lot closer than I expected.
- adgjlsfhk1 1y agono system ram is 10ns. That's closer to L2 cache.
- Cr8 1y agopcie devices can also do direct transfers to each other - if you have one of these and a gpu its relatively quick to move data between them without bouncing through main ram