NVIDIA's GeForce RTX cards are the first to adopt the new GDDR6 memory standard. Based on a recent price list from electronics components wholeseller DigiKey, the new memory chips are a lot more expensive than typical GDDR5 memory chips.
The company charge about 70 percent more for a 14Gbps GDDR5 memory chip than for a common 8Gbps GDDR5 memory chip of the same capacity. It's unknown how much more NVIDIA and add-in board partners pay for GDDR6 memory, but it's obvious that there's a pretty big price difference versus previous-gen graphics memory.
The sheer disparity in pricing between GDDR6 and GDDR5 could explain why NVIDIA is developing cheaper GDDR5 variants of the RTX 2060. Graphics card manufacturers can save around $22 per card by using six GDDR5 chips instead of GDDR6.