DRAM internals
What actually happens when you read one number?
Scenario:
Row miss (slow)
Row hit (fast)
Row switch (slowest)
▶ Step forward
↺ Reset
Ready
Choose a scenario above, then step through what happens inside the chip. Each scenario shows a different access
cost
.
Latency cost
—
—
Row being opened
Row buffer loaded
Column being read
Row closed (writeback)
ROW BUFFER
empty