Share to: share facebook share twitter share wa share telegram print page

GDDR SDRAM

Computer memory and data storage types
General
Volatile
RAM
Historical
Non-volatile
ROM
NVRAM
Early-stage NVRAM
Analog recording
Optical
In development
Historical

Graphics DDR SDRAM (GDDR SDRAM) is a type of synchronous dynamic random-access memory (SDRAM) specifically designed for applications requiring high bandwidth,[1] e.g. graphics processing units (GPUs). GDDR SDRAM is distinct from the more widely known types of DDR SDRAM, such as DDR4 and DDR5, although they share some of the same features—including double data rate (DDR) data transfers. As of 2023, GDDR SDRAM has been succeeded by GDDR2, GDDR3, GDDR4, GDDR5, GDDR5X, GDDR6, GDDR6X and GDDR6W.

Generations

See also: Synchronous dynamic random-access memory § Timeline
  • Hynix GDDR SDRAM
    Hynix GDDR SDRAM
  • A Samsung GDDR3 256MBit package
    A Samsung GDDR3 256MBit package
  • A 512 MBit Qimonda GDDR3 SDRAM package
    A 512 MBit Qimonda GDDR3 SDRAM package
  • Inside a Samsung GDDR3 256MBit package
    Inside a Samsung GDDR3 256MBit package

DDR SGRAM

GDDR was initially known as DDR SGRAM (double data rate synchronous graphics RAM). It was commercially introduced as a 16 Mb memory chip by Samsung Electronics in 1998.[2]

GDDR2

Main article: GDDR2 SDRAM

GDDR3

Main article: GDDR3 SDRAM

GDDR4

Main article: GDDR4 SDRAM

GDDR5

Main article: GDDR5 SDRAM
See also: GDDR5X

GDDR6

Main article: GDDR6 SDRAM
See also: GDDR6X and GDDR6W

GDDR7

Main article: GDDR7 SDRAM

Table of transfer rates

Module type Chip type Memory clock Transfers/s Transfer rate
32 lanes GDDR2 400–500 MHz 0.8–1.0 GT/s 25.6–32.0 Gbit/s 3.2–4.0 GB/s
32 lanes GDDR3 400–1000 MHz 0.8–2.0 GT/s 25.6–64.0 Gbit/s 3.2–8.0 GB/s
32 lanes GDDR4 868–1126 MHz 1.7–2.3 GT/s 55.6–72.1 Gbit/s 6.9–9.0 GB/s
32 lanes GDDR5[3] 1000–2000 MHz 4.0–8.0 GT/s 128.0–256.0 Gbit/s 16.0–32.0 GB/s
32 lanes GDDR5X[4] 1000–1808 MHz 8.0–14.5 GT/s 256.0–462.8 Gbit/s 32.0–57.9 GB/s
32 lanes GDDR6 1375–2500 MHz 11.0–20.0 GT/s 352.0–640.0 Gbit/s 44.0–80.0 GB/s
32 lanes GDDR6X 1188–1438 MHz 19.0–23.0 GT/s 608.0–736.0 Gbit/s 76.0–92.0 GB/s
64 lanes GDDR6W ? 22.0 GT/s 1408.0 Gbit/s 176.0 GB/s
32 lanes GDDR7 ? 28.0–40.0 GT/s 896.0–1280.0 Gbit/s 112.0–160.0 GB/s

See also

References

  1. ^ "Graphics Double Data Rate 6 (GDDR6) SGRAM Standard". JEDEC: Global Standards for the Microelectronics Industry. JEDEC. Retrieved 15 March 2022.
  2. ^ "Samsung Fortnite the best battle royale". Samsung Electronics. Samsung. 17 September 1998. Retrieved 23 June 2019.
  3. ^ "GRAPHICS DOUBLE DATA RATE (GDDR5) SGRAM STANDARD JESD212C". JEDEC. 2016-02-01. Retrieved 2016-08-10.
  4. ^ "GRAPHICS DOUBLE DATA RATE (GDDR5X) SGRAM STANDARD JESD232". JEDEC. 2015-11-01. Retrieved 2016-08-10.
Stub icon

This computer hardware article is a stub. You can help Wikipedia by expanding it.
Kembali kehalaman sebelumnya