GDDR6X VRAM is claimed to be in short supply and could lead to an RTX 4070 being launched with slower GDDR6 to meet the demand

A tech site in China is reporting that the supply of Micron GDDR6X VRAM is currently in short supply. So much so that to meet the demand for the most popular GPU to use that memory, the GeForce RTX 4070, Nvidia may release a variant with slower, and cheaper, GDDR6 chips.

When it comes to VRAM and Nvidia's GeForce RTX 40-series, there's mostly only one choice: GDDR6X. The RTX 4070, 4080, and 4090 graphics cards, as well as all the Super variants, use high-speed memory that's exclusive to Micron. It also makes GDDR6 but so do other vendors, such as Samsung and SK Hynix, which helps keep the price down, though it's not quite as fast.

However, with Nvidia's dominance of the discrete video card market reliant on a single company in its supply chain, all it takes are a few hiccups to impact the chain and cause the production of cards to drop. According to BenchLife.info (via Harukaze5719 on X) that's exactly what's happening right now with the RTX 4070, Nvidia's most popular card that uses GDDR6X.

To meet the Chinese market's demand for that GPU, BenchLife suggests that Nvidia might be considering releasing a GDDR6-equipped variant of the RTX 4070.

The Founders Edition RTX 4070 and all third-party models come with 12 GB of Micron GDDR6X, clocked to 21 GT/s. Samsung mass produces 20 MT/s GDDR6 (though it does offer 24 MT/s for 'sampling') which is close enough in speed to be a suitable replacement. Where the former offers 504 GB/s of total memory bandwidth, an RTX 4070 with such GDDR6 would have 480 GB/s—a drop of just 5%.

Assuming that Nvidia does produce a GDDR6 variant of the RTX 4070, even if it's just for PC gamers in China, the obvious question to ask next is how much difference would there be in price? GDDR6 is used by AMD, Intel, Microsoft, Nvidia, and Sony so it's produced in far larger quantities and by three of the largest DRAM manufacturers in the world.

So, in general, it's a fair bit cheaper than GDDR6X, though determining exactly how much cheaper is hard to