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DRAM vs Graphics DRAM

Unlike standard DRAM, graphics DRAM is a dedicated memory specifically designed to handle the enormous demands of graphics processing. Graphics DRAM helps shift the display and graphics workload away from the computer’s main memory, improving the performance of the GPU and the system display.

Our GDDR5X line offers higher densities and up to twice the memory bandwidth of its predecessor, GDDR5.  Because it uses traditional discrete package technologies GDDR5X will also extend the lifespan of graphic card ecosystem, providing next-generation data rates on a reliable, proven graphics architecture.

See the chart and table for more detail on some of the key differences between these memory types.


Standard DRAM vs. Graphics DRAM: Specifications

 
  DDR3 SDRAM DDR4 SDRAM GDDR5 SGRAM GDDR5X SGRAM
Densities 4Gb, 8Gb 8Gb (16Gb)* 4Gb, 8Gb 8Gb (16Gb)*
Data rate 1.6–2.1 Gb/s 2.4–3.2 Gb/s 5–8 Gb/s 10–16 Gb/s
VDD, VDDQ 1.5V (1.35V) 1.2V 1.5V, 1.35V 1.35V
VPP N/A 2.5V N/A 1.8V
I/O Width (4)* 8, 16 4, 8 (16Gb)* 32/16 32/16
Number of Banks 8 16 16 16
Burst Length 4 (burst chop), 8 4 (burst chop), 8 8 16
Access Granularity (32-)* 64-, 128-bit 32-, 64- (128-)* bit 256-bit 512-bit (256-bit pseudo) *
CRC N/A Yes Yes Yes
Interface SSTL POD12 POD15, POD135 POD135
Package 78-, 96-ball BGA 78- (96-)* ball BGA 170-ball BGA 190-ball BGA

*These specifications denote future designs.