February 22, 2019

GDDR5 vs GDDR6 – What is The Difference?

Whether you are using a smartphone or a laptop, the graphics cards are an important piece of the system. In fact, they can, in a way, it is termed as the backbone of your display or how you see things on your screen. One of the common and most widely used graphics memory remains to be GDDR5. Now, graphics cards are available in multiple price options that include budget range, medium range, and the ultra high-end range. The recent development in the arena of Graphics cards has been the launch of GDDR6 chips. So, how do GDDR5 vs GDDR6 differ from each other? Let us find out.

Also Read: HBM2 vs GDDR6

Related: GDDR5 vs GDDR5x

GDDR5 vs. GDDR6 – What is The Difference?

Well, we usually do not get to see them in reality, but you cannot deny the fact that RAM (Random Access Memory) is an essential part of your smartphones, laptops and similar other devices. The GDDR5 memory standard has been the most widely used one and has been the preferred option for most of the device manufacturers.

However, the times are moving forward, and there have been new technological advancements. We have been witnessing the launch of new more powerful graphics cards surpassing the current standards. GDDR6 is one of the new graphics-memory types that has been making waves. It may be a good idea to compare the GDDR5 and GDDR6 against each other.

We will begin checking out the features and capabilities of each of them separately.


Source: Micron

We stated it already. GDDR5 has been one of the best High-end low latency RAM among the current breed of graphics cards. Continuing the trend of GDDR3 and GDDR4, the new generation graphics card has replaced the older standards. In fact, GDDR3 is now used only in the entry-level devices, while the GDDR4 has almost ceased to be available on OEM designs.

GDDR5 is undoubtedly the fastest among the graphics card memory. In fact, several graphics card manufacturers including Nvidia have been making use of the technology. The GTX 1060, GTX 1070 and AMD’s RX 580 are some of the choicest examples that we can names that use the GDDR5 memory modules.

A few features that would make it a good option is it comes with high bandwidth memory performance. Low power consumption has been one of the key highlights that would make it an exceptional choice. It can offer you speeds of up to 8 GB per sec. The graphics cards are available in multiple sizes viz 512 MB, 1 GB, 2 GB, 4 GB, and 8 GB. It would be worth mentioning that the DDR5 chips are being manufactured by several manufacturers like Samsung, Hynix, ELPIDA or Micron.

And yes, DDR5 already has a new advanced version – GDDR5X. High SGRAM and high bandwidth would make it an excellent choice for use in graphics cards in high-performance servers and other advanced units. The GDDR5X standards offer transfer speeds between 10 to 14 GB per sec.


The GDDR6 memory has been of recent origin. Samsung has recently announced to this effect. The memory standard is still under development and has been set for a launch in early 2018.

It has been a successor to GDDR5 and GDDR5X. The power consumption for the memory standard would be 1.35 Watts. The memory is capable of providing transfer speeds of up to 16 Gbps. The bandwidth supported is up to 72 GB per sec. NVidia has been planning the launch of its Volta series of graphics cards with this standard of advanced memory. The expected applications of the new age memory standard would be in Cryptocurrency mining, high-performance gaming, virtual reality, and artificial intelligence workloads. You should find the new age GDDR6 memory being manufactured by Samsung, Micron, and Hynix. The GDDR6 memory from Samsung and Micron have been planned to offer excellent speeds up to 16 Gbps. Those from Hynix will cater to the regular segment where the speeds will be limited to up to 12 to 14 Gbps.

The Comparative Chart For GDDR5 and GDDR6

GDDR6 is still just around the corner. Samsung has announced that they will be available soon in the latter half of 2018. Announcements apart, we don’t expect them to be available anytime soon. In the current scenarios, it looks like making them available would take more time than expected.

As such, we are not aware as of now, of many features and specifications that the GDDR6 is likely to come up with. However, we have been attempting to compare them based on the available information as things stand as of now.

Features / Particulars GDDR5/5X GDDR6
Power Consumption High Low *
Manufacturer Samsung, Micron, and Hynix Samsung, Micron, and Hynix
Transfer Speeds 8 Gbps for GDDR5

10 to 12 Gbps for GDDR5X

14 Gbps to 16 Gbps
Availability FBGA190, 0.65 mm pitch, 14x10mm FBGA180, 0.75 mm pitch, 14×12 mm
I/O Configuration X16/x32 X8/x16
Channel Count 1 2
Power Drawn 1.5 V 1.3 V
Sizes available 512 MB, 1 GB, 2 GB, 4 GB and 8 GB 8 GB and 16 GB
  • *- Please note that the power consumption differences indicated above are in comparison.
  • *- GRRD5 consumes low power than the old standards.


Nvidia recently announced their 2000 series of consumer focussed GPUs and their Quadro lineups which uses Raytracing and notably GDDR6 chips. Here is a quick comparison table:

Features / Particulars

NVIDIA GeForce RTX 2080 Ti

RTX 6000

RTX 8000

Number of CUDA Cores 4352 4608 4608
Number of Tensor Cores 576 576
Boost Clock Speed 1545MHz 1730 MHZ 1730 MHz
Memory Bandwidth 14 Gbps GDDR6 (616 GB/s) 14 Gbps GDDR6 14 Gbps GDDR6
Bus-width for memory 352 bit 384 bit 384 bit
VRAM Capacity 11 GB 24 GB 48 GB
Ray Performance 10 GRays per sec 10 Grays per sec 10 Grays per sec
TDP NA, likely 250 W NA, likely 250 W NA, likely 250 W
GPU  Turing Turing Turing
Architecture Support Turing Turing Turing
Compute capacity 13.4 Tflops 16 Tflops 16 Tflops

The Concluding Ideas

Well, what would we conclude with all those comparisons? Either GDDR5 or GDDR6 (with GDDR5X thrown in between) – both of them are meant and manufactured for high-end performance. They find widespread usage in the several high-end applications such as crypto, machine learning or gaming with heavy physics.

Which among them is the best? It will only depend upon the sort of applications you are putting them into. The GDDR6 is designed for the new chip structures where chips are stacked. The GDDR5 memory can be best suited in situations where older technology is used which do not opt for stacked chips.

It may be practical enough to expect more GDDR6 memory standards being in the making (GDDR6X?). We would expect the launch of the new GDDR6 standards to be out by the second half of 2018 and implementation of these memories in the graphics cards from NVidia and AMD by the end of 2018.

If you think you still have any doubts, do let us know through the comments section. We would try addressing your queries.

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