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GDDR vs DDR | Difference between GDDR and DDR

This page compares GDDR vs DDR and mentions difference between GDDR and DDR.

Both DDR and GDDR are memories used for CPU and GPU respectively. DDR is used as system memory with CPU (i.e. Central Processing Unit) in your PC. GDDR memory is used with GPU (i.e. Graphics Processing Unit) to speed up performance of graphics card. Both CPU and GPU processors are interfaced using PCI Express slot.

DDR Memory

It is one type of SDRAM (Sychronous Dynamic Random Access Memory). It synchronizes with CPU timing or clock signal. There are two types of SDRAM viz. SDR (Single Data Rate) and DDR (Double Data Rate).

DDR SDRAM types include DDR1, DDR2, DDR3 and DDR4. Following table compares different types of DDR memories.

difference between DDR memory types

GDDR Memory

It is also SDRAM type specially designed to work with GPU. It is short form of Graphics Double Data Rate Memory. There are different versions of GDDR viz. DDR1 to GDDR5, GDDR5X and GDDR6. It is manufactured by Samsung, Micron, ELPIDA and Hynix and available in various sizes.

Following table compares different types of GDDR memories.

difference between GDDR memory types

Tabular difference between DDR and GDDR memory

Following table mentions difference between DDR and GDDR memory types.

Specifications DDR GDDR
Bandwidth Lower Higher
Power consumption High Low
Heat dispersal requirements Higher Lower
Performance Low High
Capacity Low High
Speed Low High
Cost Less More

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