Remember the GeForce GTX 280? The “GT200” GPU was a gigantic beast that maxed out the limits of the “Tesla” design it was based on. It boasted 32 ROPs and something almost unseen in graphics cards before or since: a 512-bit GDDR memory bus. Well, NVIDIA could be bringing the half-kilobit bus back when the next generation of GeForce cards hits

Source: Hot Hardware – GeForce RTX 5090 Tipped For A Huge Memory Bandwidth Boost With A 512-Bit Bus