3 ms·
Forgive my naivete but: 20 megabit/mm^2 for SRAM...a 1u rack is 600mm X 914mm = 548,400mm^2. Multiply that by 20 megabits and that is about 70 Gigabytes. Does t
by g8oz 6y ago
Forgive my naivete but: 20 megabit/mm^2 for SRAM...a 1u rack is 600mm X 914mm = 548,400mm^2. Multiply that by 20 megabits and that is about 70 Gigabytes. Does that mean in theory we could build a rackmount server with an external L1 cache of 70 Gigabytes? The cost would be horrendous but I'm sure there is a scenario where it could make sense.
- opwieurposiu 6y agoThis would require an impractical amount of wires. For an 8 core, 64 bit cpu with differential signaling would need something like 8(64+64)2 = 2048 wires, and the length of the wires would mean the latency would be much worse then an on-die cache.