Overview Of Memory Bandwidths
In asynchronous mode, because of the factor of 5/4 when using a 200 MHz FSB CPU, the result is a 160 MHz memory clock (DDR320). If you install a 133 MHz FSB CPU onto the board, then numerator and denominator switch to 4/5 - and the result here is 166 MHz (DDR333).
Swipe to scroll horizontally
| FSB | Memory | FSB/Memory |
|---|---|---|
| 100 - 132 MHz | DDR266 (133 MHz) | 3/4 |
| 133 - 199 MHz | DDR266 (133 MHz)DDR333 (166 MHz) | 1/14/5 |
| 200 - (overclock) MHz | DDR266 (133 MHz)DDR320 (160 MHz)DDR400 (200 MHz) | 3/25/41/1 |
Swipe to scroll horizontally
| Memory Type | Labeling | Eff. Clock | Data Bus | Bandwidth |
|---|---|---|---|---|
| SDRAM66 | PC66 | 66 MHz | 64 Bit | 0.5 GB/s |
| SDRAM100 | PC100 | 100 MHz | 64 Bit | 0.8 GB/s |
| SDRAM133 | PC133 | 133 MHz | 64 Bit | 1.1 GB/s |
| DDR266 | PC2100 | 133 MHz | 64 Bit | 2.1 GB/s |
| DDR266-Dual | PC2100 | 133 MHz | 64 Bit | 4.2 GB/s |
| DDR333 | PC2700 | 166 MHz | 64 Bit | 2.7 GB/s |
| DDR333-Dual | PC2700 | 166 MHz | 64 Bit | 5.4 GB/s |
| DDR400 | PC3200 | 200 MHz | 64 Bit | 3.2 GB/s |
| DDR400-Dual | PC3200 | 200 MHz | 64 Bit | 6.4 GB/s |
| RDRAM 400 | PC800 | 400 MHz | 16 Bit | 1.6 GB/s |
| RDRAM 400-Dual | PC800 | 400 MHz | 2 x 16 Bit | 3.2 GB/s |
| RDRAM 533-Dual | PC1066 | 533 MHz | 2 x 16 Bit | 4.2 GB/s |
| RDRAM 600-Dual | PC1200 | 600 MHz | 2 x 16 Bit | 4.8 GB/s |
