GDDR DIMM Memory Module Manufacturers and Description, Graphics Double Data Rate Memory

DDR DIMM Memory Modules Manufacturers with Descriptions, Data Rates, and Pinouts

GDDR DIMM

Graphics Double Data Rate

GDDR Description

Graphics Double Data Rate DIMM [GDDR-DIMM, or GDDR DIMM] is similar to the JEDEC standard for Double Date Rate SDRAMs. This page covers the GDDR memory modules, which are only found on high-end Video cards used in desktop PCs. Refer to the general Memory Module page for a more complete listing of different types of modules, manufactures and descriptions. GDDR1 uses 2.5 volt signalling, GDDR2 uses 1.8 volt signalling.
GDDR 3 runs at up to around 1.5 times the speed of GDDR 2 but consumes half the power. DDR3 SDRAM devices offer data transfer rates up to 1600 Mbps. Module densities range from 256MByte up to 8GByte for standard JEDEC modules.

GDDR1 Bandwidth: up to 1.2Gbytes/s with a 300MHz clock, GDDR2 Bandwidth: up to 2.0Gbytes/s with a 500MHz clock, GDDR3 Bandwidth: up to 9.6 Gbytes/s with a 1GHz clock. GDDR4 which is just now starting to show up provides a bandwidth of 18GHz. GDDR5 operates at up to 5Gbps at 1.5 volts, [GDDR5 Pin out].

GDDR Road Map

GDDR Electrical Interface

GDDR1 uses 2.5 volt signalling, GDDR2 uses 1.8 volt signalling, GDDR3 uses 1.5 volt signalling.

GDDR DIMM Manufacturers

GDDR memory modules are found in desk tops, and workstations.
Some companies have discontinued GDDR1 support. Example IC package types:
GDDR1; TSOP-66, GDDR2; JEDEC FBGA-84, GDDR3; JEDEC FBGA-136.

Hynix {256Mb/512Mb GDDR, GDDR3, 512Mb GDDR4 SDRAM ICs}

Qimonda {Graphics RAM; GDDR, GDDR2, GDDR3, GDDR5 ICs}

Rambus {GDDR Controller, GDDR1, GDDR2, GDDR3 Controllers}

Samsung Semiconductor Inc. {GDDR1, GDDR2, GDDR3 ICs and GDDR4 memory}

DIMM Sockets; DIMM/SIMM Socket Manufacturers.

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