Clock Frequency = x
Data Rate = 2 * Frequency
Bandwith = 8 * Data Rate = 16 * Frequency
DRAM Access Time = 1 / Frequency
| Frequency | RAM Rating (= Data Rate) |
Module Rating (=Bandwith) |
Access Time (Ram Spec) |
Comment |
| 100 MHz | DDR200 | PC1600 | 10 ns | Use PC2100 Instead |
| 133 MHz | DDR266 | PC2100 | 7.5 ns | Mainstay for servers |
| 166 MHz | DDR333 | PC2700 | 6.0 ns | New desktop standard |
| 150 MHz | [DDR300] | XMS2400 [PC2400] |
7.5 ns | Basically obsolete |
| 187.5 MHz | [DDR375] | XMS3000 [PC3000] |
6.0 ns | Some comp´s use 185 or 183MHz |
| 200 MHz | DDR400 | XMS3500 [PC3500] |
5.0 ns | Ram, chipset and vendors pushing as quasi-standard |
| 217 MHz | [DDR433] | XMS3500 [PC3500] |
5.0 ns | Recently introduced overclocking parts |