Rdram Rambus Memory Rambus RDRAM 184-Pin 232-Pin PC-800  PC-1066  PC-1200
 

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| What is RAM and what does it do? | Different types of RAM | How to identify the size of RAM modules? | How to install RAM? | Frequently asked questions on computer memory RAM | Computer Memory Upgrade Websites | Mixing different kinds of RAM brands | What is DDR SDRAM and Rambus RAM ? | Which DDR RAM to buy? |

How to identify the size of RAM modules?

You have purchased a large collection of RAM modules - SIMMs and DIMMs, but you have no idea of how to identify the memory capacity in megabytes (MB) of the individual modules, and you want to know if there is any way to determine the size of a module other than by installing it on a motherboard in a computer that supports that type of RAM.

It is possible to identify the chips by part number. You have to identify the size of each the chips on a module, and then multiply the size by the number of chips on the module to determine its memory capacity.

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Different RAM manufacturers have developed their own methods of identification, so it is has become difficult to identify the chips without looking up the exact part number on a website that provides the information.

Unless they have been remarked by unscrupulous dealers that are selling substandard modules not passed for use in a computer as computer-quality, all of the chips on a particular module will have the manufacturer's name (or logo), and a part number printed on them.

For example, a 30-pin SIMM module with nine chips on the module, could have the part number - KM41C4000AJ-8. Drop the AJ-8 (the first letter is usually the quality - A, B, C, etc.), then use KM41C4000 to conduct a Google search. You should be provided with links to many sites that provide information about part numbers. One of them is http://www.memoryusa.com/guide.html.

The KM indicates parts made by Samsung. The 41 indicates that it is a 1Mbit x 4 part. This means that the chip holds 4Mbits. Eight of the nine chips hold memory, so this is a 8 x 4Mbit, or 32Mbit module. There are eight bits to a byte, therefore this is an 4MB module. The ninth chip is there to add parity. This was used as a means of checking for memory errors that is no longer used.

For a 168-pin DIMM module that has eight chips (no parity chip), and the part number - TMS626812DGE-12A - you would use TMS626812 to search for information on it.

Each chip is a 2Mbit x 8 (16Mbit) SDRAM chip. There are eight chips, so this is a 16MB SDRAM module, which is slow compared to the fastest speed that SDRAM modules reached. The 12 in the part number indicates that the module has a maximum frequency (speed) of 66MHz. SDRAM modules, now superseded by DDR and Rambus RAM, reached a maximum speed of 133MHz.

Decode RAM chip part numbers

At the following site, you just enter the RAM chip part numbers to find out the manufacturer and specifications. -

http://www.chipmunk.nl/DRAM/ChipManufacturers.htm


16-bit Rambus RDRAM memory (184 pins)
This type of RAM is increasing in popularity. These modules operate at up to 533Mhz speed compared to 133Mhz for SDRAM. Most Pentium 4 systems support RDRAM modules for top performance.
PC800 Rambus RIMM (RDRAM) - 184 pins
64Mb Rambus RIMM Samsung
184pins, PC800, 40ns, 16-bit, MR16R1622DF0-CM8
Manufacturer: Samsung, Warranty: Lifetime.

128Mb Rambus RIMM Samsung
184pins, PC800, 40ns, 16-bit, MR16R1624AF0-CM8
Manufacturer: Samsung, Warranty: Lifetime.

256Mb Rambus RIMM Samsung
184pins, PC800, 40ns, 16-bit, MR16R1628DF0-CM8
Manufacturer: Samsung, Warranty: Lifetime.

512Mb Rambus RIMM Samsung
184pins, PC800, 40ns, 16-bit, MR16R162GDF0-CM8
Manufacturer: Samsung, Warranty: Lifetime.

128Mb ECC Rambus RIMM Samsung
184pins, PC800, 40ns, 18-bit, ECC Error Correction
MR18R1624AF0-CM8, Manufacturer: Samsung
Warranty: Lifetime.

256Mb ECC Rambus RIMM Elpida Stock clearance!
184pins, PC800, 40ns, 18-bit, ECC Error Correction
MC-4R256FKE8D-840, Manufacturer: Elpida
Warranty: 2 years.

256Mb ECC Rambus RIMM Samsung
184pins, PC800, 40ns, 18-bit, ECC Error Correction
MR18R1628DF0-CM8, Manufacturer: Samsung
Warranty: Lifetime.

512Mb ECC Rambus RIMM Samsung
184pins, PC800, 40ns, 18-bit, ECC Error Correction
MR18R162GAF0-CM8, Manufacturer: Samsung
Warranty: Lifetime.
PC1066 Rambus RIMM (RDRAM) - 184 pins - for overclocking

Special offer on Samsung PC1066 RDRAM 184 pins
128Mb, 256Mb, 512Mb

128Mb Rambus PC1066 RDRAM (RIMM2100)
184 pins, 16-bit, 1066Mhz, RIMM2100, 32ns, for Intel
850E chipsets, P/N: MR16R1624DF0-CT9,
Manufacturer: Samsung, Warranty: 10 years.

256Mb Rambus PC1066 RDRAM (RIMM2100)
184 pins, 16-bit, 1066Mhz, RIMM2100, 32ns, for Intel
850E chipsets, P/N: MR16R1628DF0-CT9.
Manufacturer: Samsung, Warranty: 10 years.

256Mb Rambus PC1066 RDRAM (RIMM2100)
184 pins, 16-bit, 1066Mhz, RIMM2100, 32ns
for Intel 850E, P/N: KVR1066X16-8/256,
Manufacturer: Kingston, Warranty: Lifetime.

512Mb Rambus PC1066 RDRAM (RIMM2100)
184 pins, 16-bit, 1066Mhz, RIMM2100, 32ns, for Intel
850E chipsets, P/N: MR16R162GDF0-CT9,
Manufacturer: Samsung, Warranty: 10 years
PC1200 Rambus RIMM (RDRAM) - 184 pins - for overclocking

256Mb Rambus PC1200 RDRAM (RIMM2400) - OCZ New product!
184 pins, 16-bit, 1200Mhz, RIMM2400, 32ns
Suitable for i850E and SIS658 chipsets, non-ECC
Bandwidth 4,8Gb/s Dual Channel,Manufacturer: OCZ Technology, Warranty: Lifetime.

Upgrade Kits (special deals on 2 modules)

128Mb RIMM Upgrade Kit, Samsung
(2x 64Mb modules), 184pins, PC800, 40ns, non-ECC
Manufacturer: Samsung, Warranty: Lifetime.


256Mb RIMM Upgrade Kit, Samsung
(2x 128Mb modules), 184pins, PC800, 40ns, non-ECC
Manufacturer: Samsung, Warranty: Lifetime.

512Mb RIMM Upgrade Kit, Samsung
(2x 256Mb modules), 184pins, PC800, 40ns, non-ECC
Manufacturer: Samsung, Warranty: Lifetime.

1Gb RIMM Upgrade Kit, Samsung
(2x 512Mb modules), 184pins, PC800, 40ns, non-ECC
Manufacturer: Samsung, Warranty: Lifetime.

256Mb ECC RIMM Upgrade Kit, Samsung
(2x 128Mb modules), 184pins, PC800, 40ns, 18 bit, ECC
Manufacturer: Samsung, Warranty: Lifetime.

512Mb ECC RIMM Upgrade Kit, Samsung
(2x 256Mb modules), 184pins, PC800, 40ns, 18 bit, ECC
Manufacturer: Samsung, Warranty: Lifetime.

1Gb ECC RIMM Upgrade Kit, Samsung
(2x 512Mb modules), 184pins, PC800, 40ns, 18 bit, ECC
Manufacturer: Samsung, Warranty: Lifetime .
32-bit Rambus RDRAM memory (232 pins)
32-bit Rambus modules provides two independent memory channels, which means there is no requirement to install these modules in pairs of two.
RIMM3200 modules provide a memory bandwidth of 3,2Gb/s, RIMM4200 provides 4,2Gb/s and RIMM4800 provides an unparalleled transfer rate of 4,8Gb/s.
PC800 Rambus RIMM3200 - 232 pins
256Mb Rambus RIMM PC800 32 bit (RIMM3200)
232 pins, 32-bit, PC800, RIMM3200, 40ns MD16R1628AF0-CM8, non-ECC.
Manufacturer: Samsung, Warranty: Lifetime
PC1066 Rambus RIMM4200 - 232 pins - for overclocking

256Mb Rambus PC1066 32-bit RDRAM (RIMM4200)
232 pins, 32 bit, 1066Mhz, RIMM4200, 32ns
for Intel 850 chipsets, P/N: MD16R1628AF0-CN9
Non-ECC, Manufacturer: Samsung, Warranty: 10 years


512Mb Rambus PC1066 32-bit RDRAM (RIMM4200)
232 pins, 32 bit, 1066Mhz, RIMM4200, 32ns
for Intel 850 chipsets, P/N: MD16R162GDF0-CT9
Non-ECC, Manufacturer: Samsung, Warranty: 10 years

512Mb ECC Rambus PC1066 32-bit RDRAM (RIMM4200)
232 pins, 32 bit, 1066Mhz, RIMM4200, 32ns
for Intel 850 chipsets, P/N: MD18R162GAF0-CN9
ECC Error Correction, Manufacturer: Samsung, Warranty: 10 years
PC1200 Rambus RIMM4800 - 232 pins - for overclocking

256Mb Rambus RIMM PC1200 32 bit (RIMM4800) - OCZ
232 pins, 32-bit, PC1200, RIMM4800, 32ns
4.8 Gb/s transfer, non-ECC, Manufacturer: OCZ, Warranty: Lifetime

 

| What is RAM and what does it do? | Different types of RAM | How to identify the size of RAM modules? | How to install RAM? | Frequently asked questions on computer memory RAM | Computer Memory Upgrade Websites | Mixing different kinds of RAM brands | What is DDR SDRAM and Rambus RAM ? | Which DDR RAM to buy? |

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