Editing List of interface bit rates (section)

===[[Dynamic random-access memory]]===
The table below shows values for [[IBM PC compatible|PC]] memory module types.
These modules usually combine multiple chips on one [[circuit board]].
SIMM modules connect to the computer via an 8-bit- or 32-bit-wide interface. RIMM modules used by [[RDRAM]] are 16-bit- or 32-bit-wide.<ref>{{cite web |url=https://www.rambus.com/memory-and-interfaces/rdram-memory-architecture/ |title=RDRAM Memory Architecture}}</ref>
DIMM modules connect to the computer via a 64-bit-wide interface.
Some other computer architectures use different modules with a different bus width.

In a single-channel configuration, only one module at a time can transfer information to the CPU.
In multi-channel configurations, multiple modules can transfer information to the CPU at the same time, in parallel.
[[FPM DRAM|FPM]], [[EDO DRAM|EDO]], [[SDRAM#SDR SDRAM|SDR]], and [[RDRAM]] memory was not commonly installed in a dual-channel configuration. [[DDR SDRAM|DDR]] and [[DDR2 SDRAM|DDR2]] memory is usually installed in single- or dual-channel configuration. [[DDR3]] memory is installed in single-, dual-, tri-, and quad-channel configurations.
Bit rates of multi-channel configurations are the product of the module bit-rate (given below) and the number of channels.

{|class="wikitable sortable"
|-
! Module type            !! Chip type  !! Internal clock{{ref label|int-clock|a|a}} !!               Bus clock      !!               Bus speed{{ref label|bus-speed|b|b}}      !! colspan=2   | Transfer rate
|-
| FPM DRAM               || 70 ns tRAC || align="right" | {{val|22|ul=MHz}} || align=right | {{val|22|u=MHz}} || align=right | {{val|0.0177|ul=GT/s}}|| align="right" | {{val|1.416|u=Gbit/s}} || align=right | {{val|177|u=MB/s}}
|-
| EDO DRAM (486 CPU) || 60 ns tRAC || align="right" | {{val|33|u=MHz}} || align=right | {{val|33|u=MHz}} || align=right | {{val|0.0266|u=GT/s}}|| align="right" | {{val|2.128|u=Gbit/s}} || align=right | {{val|266|u=MB/s}}

|-
| EDO DRAM (Pentium CPU) || 60 ns tRAC || align="right" | {{val|66|u=MHz}} || align=right | {{val|66|u=MHz}} || align=right | {{val|0.066|u=GT/s}} || align="right" | {{val|4.264|u=Gbit/s}} || align=right | {{val|533|u=MB/s}}

|-
| PC-66 SDR SDRAM        || 10/15 ns  || align=right | {{val|66|u=MHz}} || align=right | {{val|66|u=MHz}} || align=right | {{val|0.066|u=GT/s}} || align=right | {{val|4.264|u=Gbit/s}} || align=right | {{val|533|u=MB/s}}
|-
| PC-100 SDR SDRAM       || 8 ns      || align=right | {{val|100|u=MHz}} || align=right | {{val|100|u=MHz}} || align=right | {{val|0.100|u=GT/s}} || align=right | {{val|6.4|u=Gbit/s}} || align=right | {{val|800|u=MB/s}}
|-
| PC-133 SDR SDRAM       || 7/7.5 ns  || align=right | {{val|133|u=MHz}} || align=right | {{val|133|u=MHz}} || align=right | {{val|0.133|u=GT/s}} || align=right | {{val|8.528|u=Gbit/s}} || align=right | {{val|1.066|u=GB/s}}
|-
| RIMM-1200 RDRAM        || PC600     || align=right | {{val|75|u=MHz}} || align=right | {{val|300|u=MHz}} || align=right | {{val|0.600|u=GT/s}} || align=right | {{val|9.6|u=Gbit/s}} || align=right | {{val|1.2|u=GB/s}}
|-
| RIMM-1400 RDRAM        || PC700     || align=right | {{val|87.5|u=MHz}} || align=right | {{val|350|u=MHz}} || align=right | {{val|0.700|u=GT/s}} || align=right | {{val|11.2|u=Gbit/s}} || align=right | {{val|1.4|u=GB/s}}
|-
| RIMM-1600 RDRAM        || PC800     || align=right | {{val|100|u=MHz}} || align=right | {{val|400|u=MHz}} || align=right | {{val|0.800|u=GT/s}} || align=right | {{val|12.8|u=Gbit/s}} || align=right | {{val|1.6|u=GB/s}}
|-
| PC-1600 DDR SDRAM      || DDR-200   || align=right | {{val|100|u=MHz}} || align=right | {{val|100|u=MHz}} || align=right | {{val|0.200|u=GT/s}} || align=right | {{val|12.8|u=Gbit/s}} || align=right | {{val|1.6|u=GB/s}}
|-
| RIMM-2100 RDRAM        || PC1066    || align=right | {{val|133|u=MHz}} || align=right | {{val|533|u=MHz}} || align=right | {{val|1.066|u=GT/s}} || align=right | {{val|17.034|u=Gbit/s}} || align=right | {{val|2.133|u=GB/s}}
|-
| PC-2100 DDR SDRAM      || DDR-266   || align=right | {{val|133|u=MHz}} || align=right | {{val|133|u=MHz}} || align=right | {{val|0.266|u=GT/s}} || align=right | {{val|17.034|u=Gbit/s}} || align=right | {{val|2.133|u=GB/s}}
|-
| RIMM-2400 RDRAM        || PC1200    || align=right | {{val|150|u=MHz}} || align=right | {{val|600|u=MHz}} || align=right | {{val|1.2|u=GT/s}} || align=right | {{val|19.2|u=Gbit/s}} || align=right | {{val|2.4|u=GB/s}}
|-
| PC-2700 DDR SDRAM      || DDR-333   || align=right | {{val|166|u=MHz}} || align=right | {{val|166|u=MHz}} || align=right | {{val|0.333|u=GT/s}} || align=right | {{val|21.336|u=Gbit/s}} || align=right | {{val|2.667|u=GB/s}}
|-
| PC-3200 DDR SDRAM      || DDR-400   || align=right | {{val|200|u=MHz}} || align=right | {{val|200|u=MHz}} || align=right | {{val|0.400|u=GT/s}} || align=right | {{val|25.6|u=Gbit/s}} || align=right | {{val|3.2|u=GB/s}}
|-
| PC2-3200 DDR2 SDRAM    || DDR2-400  || align=right | {{val|100|u=MHz}} || align=right | {{val|200|u=MHz}} || align=right | {{val|0.400|u=GT/s}} || align=right | {{val|25.6|u=Gbit/s}} || align=right | {{val|3.2|u=GB/s}}
|-
| PC-3500 DDR SDRAM      || DDR-433   || align=right | {{val|216|u=MHz}} || align=right | {{val|216|u=MHz}} || align=right | {{val|0.433|u=GT/s}} || align=right | {{val|27.728|u=Gbit/s}} || align=right | {{val|3.466|u=GB/s}}
|-
| PC-3700 DDR SDRAM      || DDR-466   || align=right | {{val|233|u=MHz}} || align=right | {{val|233|u=MHz}} || align=right | {{val|0.466|u=GT/s}} || align=right | {{val|29.864|u=Gbit/s}} || align=right | {{val|3.733|u=GB/s}}
|-
| PC-4000 DDR SDRAM      || DDR-500   || align=right | {{val|250|u=MHz}} || align=right | {{val|250|u=MHz}} || align=right | {{val|0.500|u=GT/s}} || align=right | {{val|32|u=Gbit/s}} || align=right | {{val|4|u=GB/s}}
|-
| PC-4200 DDR SDRAM      || DDR-533   || align=right | {{val|266|u=MHz}} || align=right | {{val|266|u=MHz}} || align=right | {{val|0.533|u=GT/s}} || align=right | {{val|34.128|u=Gbit/s}} || align=right | {{val|4.266|u=GB/s}}
|-
| PC2-4200 DDR2 SDRAM    || DDR2-533  || align=right | {{val|133|u=MHz}} || align=right | {{val|266|u=MHz}} || align=right | {{val|0.533|u=GT/s}} || align=right | {{val|34.128|u=Gbit/s}} || align=right | {{val|4.266|u=GB/s}}
|-
| PC-4400 DDR SDRAM      || DDR-550   || align=right | {{val|275|u=MHz}} || align=right | {{val|275|u=MHz}} || align=right | {{val|0.550|u=GT/s}} || align=right | {{val|35.2|u=Gbit/s}} || align=right | {{val|4.4|u=GB/s}}
|-
| PC-4800 DDR SDRAM      || DDR-600   || align=right | {{val|300|u=MHz}} || align=right | {{val|300|u=MHz}} || align=right | {{val|0.600|u=GT/s}} || align=right | {{val|38.4|u=Gbit/s}} || align=right | {{val|4.8|u=GB/s}}
|-
| PC2-5300 DDR2 SDRAM    || DDR2-667  || align=right | {{val|166|u=MHz}} || align=right | {{val|333|u=MHz}} || align=right | {{val|0.667|u=GT/s}} || align=right | {{val|42.664|u=Gbit/s}} || align=right | {{val|5.333|u=GB/s}}
|-
| PC2-6000 DDR2 SDRAM    || DDR2-750  || align=right | {{val|188|u=MHz}} || align=right | {{val|375|u=MHz}} || align=right | {{val|0.750|u=GT/s}} || align=right | {{val|48|u=Gbit/s}} || align=right | {{val|6|u=GB/s}}
|-
| PC2-6400 DDR2 SDRAM    || DDR2-800  || align=right | {{val|200|u=MHz}} || align=right | {{val|400|u=MHz}} || align=right | {{val|0.800|u=GT/s}} || align=right | {{val|51.2|u=Gbit/s}} || align=right | {{val|6.4|u=GB/s}}
|-
| PC3-6400 DDR3 SDRAM    || DDR3-800  || align=right | {{val|100|u=MHz}} || align=right | {{val|400|u=MHz}} || align=right | {{val|0.800|u=GT/s}} || align=right | {{val|51.2|u=Gbit/s}} || align=right | {{val|6.4|u=GB/s}}
|-
| PC2-7200 DDR2 SDRAM    || DDR2-900  || align=right | {{val|225|u=MHz}} || align=right | {{val|450|u=MHz}} || align=right | {{val|0.900|u=GT/s}} || align=right | {{val|57.6|u=Gbit/s}} || align=right | {{val|7.2|u=GB/s}}
|-
| PC2-8000 DDR2 SDRAM    || DDR2-1000 || align=right | {{val|250|u=MHz}} || align=right | {{val|500|u=MHz}} || align=right | {{val|1|u=GT/s}} || align=right | {{val|64|u=Gbit/s}} || align=right | {{val|8|u=GB/s}}
|-
| PC2-8500 DDR2 SDRAM    || DDR2-1066 || align=right | {{val|266|u=MHz}} || align=right | {{val|533|u=MHz}} || align=right | {{val|1.066|u=GT/s}} || align=right | {{val|68|u=Gbit/s}} || align=right | {{val|8.5|u=GB/s}}
|-
| PC3-8500 DDR3 SDRAM    || DDR3-1066 || align=right | {{val|133|u=MHz}} || align=right | {{val|533|u=MHz}} || align=right | {{val|1.066|u=GT/s}} || align=right | {{val|68|u=Gbit/s}} || align=right | {{val|8.5|u=GB/s}}
|-
| PC2-8800 DDR2 SDRAM    || DDR2-1100 || align=right | {{val|275|u=MHz}} || align=right | {{val|550|u=MHz}} || align=right | {{val|1.1|u=GT/s}} || align=right | {{val|70.4|u=Gbit/s}} || align=right | {{val|8.8|u=GB/s}}
|-
| PC2-9200 DDR2 SDRAM    || DDR2-1150 || align=right | {{val|288|u=MHz}} || align=right | {{val|575|u=MHz}} || align=right | {{val|1.15|u=GT/s}} || align=right | {{val|73.6|u=Gbit/s}} || align=right | {{val|9.2|u=GB/s}}
|-
| PC2-9600 DDR2 SDRAM    || DDR2-1200 || align=right | {{val|300|u=MHz}} || align=right | {{val|600|u=MHz}} || align=right | {{val|1.2|u=GT/s}} || align=right | {{val|76.8|u=Gbit/s}} || align=right | {{val|9.6|u=GB/s}}
|-
| PC2-10000 DDR2 SDRAM   || DDR2-1250 || align=right | {{val|312|u=MHz}} || align=right | {{val|625|u=MHz}} || align=right | {{val|1.25|u=GT/s}} || align=right | {{val|80|u=Gbit/s}} || align=right | {{val|10|u=GB/s}}
|-
| PC3-10600 DDR3 SDRAM   || DDR3-1333 || align=right | {{val|167|u=MHz}} || align=right | {{val|667|u=MHz}} || align=right | {{val|1.333|u=GT/s}} || align=right | {{val|85.336|u=Gbit/s}} || align=right | {{val|10.667|u=GB/s}}
|-
| PC3-11000 DDR3 SDRAM   || DDR3-1375 || align=right | {{val|172|u=MHz}} || align=right | {{val|688|u=MHz}} || align=right | {{val|1.375|u=GT/s}} || align=right | {{val|88|u=Gbit/s}} || align=right | {{val|11|u=GB/s}}
|-
| PC3-12800 DDR3 SDRAM   || DDR3-1600 || align=right | {{val|200|u=MHz}} || align=right | {{val|800|u=MHz}} || align=right | {{val|1.6|u=GT/s}} || align=right | {{val|102.4|u=Gbit/s}} || align=right | {{val|12.8|u=GB/s}}
|-
| PC3-13000 DDR3 SDRAM   || DDR3-1625 || align=right | {{val|203|u=MHz}} || align=right | {{val|813|u=MHz}} || align=right | {{val|1.625|u=GT/s}} || align=right | {{val|104|u=Gbit/s}} || align=right | {{val|13|u=GB/s}}
|-
| PC3-14400 DDR3 SDRAM   || DDR3-1800 || align=right | {{val|225|u=MHz}} || align=right | {{val|900|u=MHz}} || align=right | {{val|1.8|u=GT/s}} || align=right | {{val|115.2|u=Gbit/s}} || align=right | {{val|14.4|u=GB/s}}
|-
| PC3-14900 DDR3 SDRAM   || DDR3-1866 || align=right | {{val|233|u=MHz}} || align=right | {{val|933|u=MHz}} || align=right | {{val|1.866|u=GT/s}} || align=right | {{val|119.464|u=Gbit/s}} || align=right | {{val|14.933|u=GB/s}}
|-
| PC3-16000 DDR3 SDRAM   || DDR3-2000 || align=right | {{val|250|u=MHz}} || align=right | {{val|1000|u=MHz}} || align=right | {{val|2|u=GT/s}} || align=right | {{val|128|u=Gbit/s}} || align=right | {{val|16|u=GB/s}}
|-
| PC3-17000 DDR3 SDRAM   || DDR3-2133 || align=right | {{val|267|u=MHz}} || align=right | {{val|1067|u=MHz}} || align=right | {{val|2.133|u=GT/s}} || align=right | {{val|136.528|u=Gbit/s}} || align=right | {{val|17.066|u=GB/s}}
|-
| PC4-17000 DDR4 SDRAM   || DDR4-2133 || align=right | {{val|267|u=MHz}} || align=right | {{val|1067|u=MHz}} || align=right | {{val|2.133|u=GT/s}} || align=right | {{val|136.5|u=Gbit/s}} || align=right | {{val|17|u=GB/s}}
|-
| PC3-17600 DDR3 SDRAM   || DDR3-2200 || align=right | {{val|275|u=MHz}} || align=right | {{val|1100|u=MHz}} || align=right | {{val|2.2|u=GT/s}} || align=right | {{val|140.8|u=Gbit/s}} || align=right | {{val|17.6|u=GB/s}}
|-
| PC3-19200 DDR3 SDRAM   || DDR3-2400 || align=right | {{val|300|u=MHz}} || align=right | {{val|1200|u=MHz}} || align=right | {{val|2.4|u=GT/s}} || align=right | {{val|153.6|u=Gbit/s}} || align=right | {{val|19.2|u=GB/s}}
|-
| PC4-19200 DDR4 SDRAM   || DDR4-2400 || align=right | {{val|300|u=MHz}} || align=right | {{val|1200|u=MHz}} || align=right | {{val|2.4|u=GT/s}} || align=right | {{val|153.6|u=Gbit/s}} || align=right | {{val|19.2|u=GB/s}}
|-
| PC3-21300 DDR3 SDRAM   || DDR3-2666 || align=right | {{val|333|u=MHz}} || align=right | {{val|1333|u=MHz}} || align=right | {{val|2.666|u=GT/s}} || align=right | {{val|170.5|u=Gbit/s}} || align=right | {{val|21.3|u=GB/s}}
|-
| PC4-21300 DDR4 SDRAM   || DDR4-2666 || align=right | {{val|333|u=MHz}} || align=right | {{val|1333|u=MHz}} || align=right | {{val|2.666|u=GT/s}} || align=right | {{val|170.5|u=Gbit/s}} || align=right | {{val|21.3|u=GB/s}}
|-
| PC3-24000 DDR3 SDRAM   || DDR3-3000 || align=right | {{val|375|u=MHz}} || align=right | {{val|1500|u=MHz}} || align=right | {{val|3.0|u=GT/s}} || align=right | {{val|192|u=Gbit/s}} || align=right | {{val|24|u=GB/s}}
|-
| PC4-24000 DDR4 SDRAM   || DDR4-3000 || align=right | {{val|375|u=MHz}} || align=right | {{val|1500|u=MHz}} || align=right | {{val|3.0|u=GT/s}} || align=right | {{val|192|u=Gbit/s}} || align=right | {{val|24|u=GB/s}}
|-
| PC4-25600 DDR4 SDRAM   || DDR4-3200 || align=right | {{val|400|u=MHz}} || align=right | {{val|1600|u=MHz}} || align=right | {{val|3.2|u=GT/s}} || align=right | {{val|204.8|u=Gbit/s}} || align=right | {{val|25.6|u=GB/s}}
|-
| PC5-41600 DDR5 SDRAM   || DDR5-5200 || align=right |{{val|650|u=MHz}} || align=right | {{val|2600|u=MHz}} || align=right | {{val|5.2|u=GT/s}} || align=right | {{val|332.8|u=Gbit/s}} || align=right | {{val|41.6|u=GB/s}}
|-
| PC5-44800 DDR5 SDRAM   || DDR5-5600 || align=right |{{val|700|u=MHz}} || align=right | {{val|2800|u=MHz}} || align=right | {{val|5.6|u=GT/s}} || align=right | {{val|358.4|u=Gbit/s}} || align=right | {{val|44.8|u=GB/s}}
|-
| PC5-51200 DDR5 SDRAM   || DDR5-6400 || align=right |{{val|800|u=MHz}} || align=right | {{val|3200|u=MHz}} || align=right | {{val|6.4|u=GT/s}} || align=right | {{val|409.6|u=Gbit/s}} || align=right | {{val|51.2|u=GB/s}}
|-
| PC5-57600 DDR5 SDRAM   || DDR5-7200 || align=right |{{val|900|u=MHz}} || align=right | {{val|3600|u=MHz}} || align=right | {{val|7.2|u=GT/s}} || align=right | {{val|460.8|u=Gbit/s}} || align=right | {{val|57.6|u=GB/s}}
|-
| PC5-64000 DDR5 SDRAM   || DDR5-8000 || align=right |{{val|1000|u=MHz}} || align=right | {{val|4000|u=MHz}} || align=right | {{val|8.0|u=GT/s}} || align=right | {{val|512.0|u=Gbit/s}} || align=right | {{val|64.0|u=GB/s}}
|-
| PC5-70400 DDR5 SDRAM   || DDR5-8800 || align=right |{{val|1100|u=MHz}} || align=right | {{val|4400|u=MHz}} || align=right | {{val|8.8|u=GT/s}} || align=right | {{val|563.2|u=Gbit/s}} || align=right | {{val|70.4|u=GB/s}}
|}

{{note label|int-clock|a|a}} The clock rate at which [[DRAM]] memory cells operate. The [[memory latency]] is largely determined by this rate. Note that until the introduction of [[DDR4]] the internal clock rate saw relatively slow progress. [[DDR SDRAM|DDR]]/[[DDR2 SDRAM|DDR2]]/[[DDR3]] memory uses 2n/4n/8n (respectively) [[SDRAM#DDR SDRAM prefetch architecture|prefetch buffer]] to provide higher throughput, while the internal memory speed remains similar to that of the previous generation.

{{note label|bus-speed|b|b}} The memory speed or clock rate advertised by manufactures and suppliers usually refers to this rate (with 1&nbsp;GT/s&nbsp;= 1&nbsp;GHz). Note that modern types of memory use [[double data rate|DDR bus]] with two transfers per clock.