Nvidia’s RTX 50 series is expected to launch later this year and as we get closer to this time more leaks and rumors about its features and design seem to be spreading. We’ve recently covered the speculation surrounding the RTX 5090, including its dual-slot cooling solution, its cinderblock design, and improved VRAM.
However, the latest rumors related to this product are concerned with its potential to feature a 448-bit memory bus. This is a good improvement over the RTX 4090’s 384-bit, so let’s take a closer look.
What do the RTX 5090 memory bus rumors suggest?
The RTX 5090 has been rumored to feature a 448-bit memory bus out of the 512 bits available on the GB202 graphics processor. This rumor was introduced by a user on Chiphell, named Panzerlied, who simply stated “It is 512 bits, but 5090 is only 448 bits”. This was in response to another user asking if the 512-bit rumor was debunked:
Previous rumors suggested that the RTX 5090 had a 512-bit memory bus, with later speculation circling saying there could be a 384-bit memory bus. However, the most recent rumors offer a different view; suggesting that instead of a 512-bit the RTX 5090 will use a 448-bit bus. This implies that the product will only use 14 out of the 16 available memory modules. If this speculation is correct it would suggest that the RTX 590 would feature 28GB GDDR7 specs. If we pair the memory bus information with the memory speed information that was previously leaked, the bandwidth should be 1568 GB/s which demonstrates a massive 50% increase over its predecessor the RTX 4090.
Here is a list of the rumored memory specs we’ve heard so far:
- 14x 8Gbit (2GB) GDDR7 modules
- 28GB total capacity
- 28 Gbps speed
- 1568 GB/s maximum memory bandwidth
The total amount of capacity being 28GB rather than 32GB means that Nvidia may be leaving some room for additional “Ti/SUPER” upgrades to come. It could be suggested that the 512-bit memory won’t be used by gaming GPUs and is instead offered for ProViz RTX series, which may need the room for more memory capacity.
