10 July 2023

GDDR6 Vs HBM2 | Difference | Comparison

GDDR6 and HBM2 are both types of memory that are commonly used in high-performance graphics cards and higher bandwidth applications. Here we have given the difference between GDDR6 and HBM2 to better understand this topic.

What is GDDR6? 

The system RAM used in contemporary computers, DDR4 or DDR5, is similar to graphics double data rate 6, or GDDR6. GDDR6, the replacement for GDDR5, has more bandwidth and capacity than its forerunner. The two main categories of memory transfer speeds have seen the most advancements. GDDR6, which transfers data at a rate of 14–16 GB per second, is roughly twice as quick as GDDR5, which does so at an 8 GB per second pace. Moreover. GDDR6 has a greater module capacity than GDDR5. While actively consuming all of it, a GPU divides the available VRAM into several modules. Memory comes in five different sizes: 512 MB, 1 GB, 2 GB, 4 GB, and 8 GB.

What is HBM2?

HBM stands for High Bandwidth Memory (2). Along with 3D stack DRAM chips, Graphics cards also have this memory functionality. It makes use of silicon vias and micro bumps to connect DRAM dies.

GDDR6 Vs HBM2 | Difference between GDDR6 and HBM2

  • GDDR6 manufactures Samsung, Micron, and Hynix, whereas HBM2 manufactures Hynix and Samsung.
  • The total capacity of GDDR6 is 16 to 24 GB, While HBM2's total capacity is up to 32 GB or more.
  • Samsung, Micron, and Hynix are manufactured in GDDR6, whereas Hynix and Samsung are manufactured in HBM2.
  • The total capacity of GDD6 is 16 to 24 GB, on the other hand, HBM2's total capacity is up to 32 GB or more.
  • The appearance of GDDR6 is square or rectangular, and HBM2 are cuboid or cub types structure.
  • The maximum capacity of GDDR6 is 2 GB per stack, whereas HBM2's maximum capacity is 4 to 8 GB per stack. 
  • The maximum speed of GDDR6 is 16 Gbps, whereas the HBM2 speed is 2.4 Gbps.
  • The bus width of GDDR6 is 256 to 384 bits, Whereas the HBM2 bus width is 3092 bits.
  • Power consumption is low in GDDR6, and HBM2 power consumption is the lowest.
  • The power efficiency of HBM2 is higher compared to GDDR6. GDDR6 requires more power to achieve higher bandwidth.
  • Application areas of GDDR6 are high-end gaming, virtual reality, cryptocurrency mining and artificial intelligence(AI), HBM2 application VR gaming, AR gaming, and other heavy memory-intensive applications and gaming.
  • HBM2 provides higher memory bandwidth compared to GDDR6.
  • GDDR6 offers higher memory capacities compared to HBM2.
  • GDDR6 is generally considered to be more cost-effective compared to HBM2.
  • GDDR6 is more commonly found in mainstream gaming graphics cards where high memory capacity and lower cost are prioritized, HBM2 is typically used in high-end graphics cards and computing applications that require high memory bandwidth.
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