Nvidia’s new RTX 50 series Blackwell GB203 and GB205 graphics cards will have the same memory bus width as the existing Nvidia RTX 40 series AD103 and AD104 GPUs found in the RTX 4080 Super and RTX 4070 Super. In this respect reports Tech4gamers portal with insider link to Kopite7kimi.
According to the source, the GB205 and GB203 will use 192 and 256-bit buses respectively, while the GB202 will have a 512-bit memory bus, likely making it the successor to the GeForce RTX 4090. Although the memory remains the same, the use of GDDR7 will allow the GeForce RTX 5090 to surpass its predecessor in terms of throughput.
Thus, GB202, a possible Nvidia GeForce RTX 5090, will receive 24 GB of memory with a 512-bit bus and 1536 GB/s bandwidth. GB203 will offer 384-bit bus and 16 GB memory with 1024 GB/s bandwidth, while GB204 will offer 256-bit bus with 12 GB memory and 768 GB/s bandwidth.
The reduction in memory interface width on the latest Nvidia and AMD GPUs is due to the use of faster memory combined with increased L2/L3 cache size.
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Source: Gazeta
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