Learn the basics of memory in 10 minutes through the SuperTalent “Memory 101” slide show.
Memory 101 Topics:
DDR versus DDR2
DDR and DDR2 are very similar
-- DDR2 has enhancements that improve signal quality at high speeds
-- DDR2 is scalable to much higher clock speeds and uses less power
DDR and DDR2 are not interchangeable
-- Different signaling, and different pin count
|
| DDR | DDR2 |
| 184-pin DIMM | 240-pin DIMM |
| 64-bit data bus | 64-bit data bus |
| 200, 333, 400 MHz | 400, 533, 667, 800 MHz |
| 2.5 Volts | 1.8 Volts |
| TSOP-II, FBGA chips | FBGA chips only |
| 2-bit prefetch | 4-bit prefetch |
| None | On-die termination |
|
