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 chips, 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].
GDDR1 uses 2.5 volt signalling, GDDR2 uses 1.8 volt signalling, GDDR3 uses 1.5 volt signalling.
GDDR memory chips are found in desk tops, and work-stations.
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}
Rambus {GDDR Controller, GDDR1, GDDR2, GDDR3 Controllers}
Samsung Semiconductor Inc.
{GDDR1, GDDR2, GDDR3 ICs and GDDR4 memory}
DIMM Sockets;
DIMM/SIMM Socket Manufacturers.
Navigation: Engineering Home > OEM Equipment Vendors > Computer Gear > Memory Modules > GDDR DIMM Sticks.
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