PC Ekspert Forum - View Single Post - Nvidia GeForce RTX 50X0 series (Blackwell)

The Exiled · 26.12.2024., 12:36

Citiraj:

nVidia GeForce RTX 5090 powered by "GB202" silicon, 512-bit GDDR7, ASIC pictured

Citiraj:

Here is the first picture of what is very likely the GeForce RTX 5090 "Blackwell," the successor to the RTX 4090 "Ada." The picture, its massive GPU, and layout appear to confirm the weekend's bare PCB leak. The RTX 5090 is powered by the "GB202" silicon, the largest gaming GPU based on the "Blackwell" graphics architecture. The silicon in the picture has the ASIC code "GB202-300-A1." From this ASIC code, we can deduce that the RTX 5090 may not max out the silicon (i.e. enable all SM present on it), as maxed-out nVidia ASICs tend to have the variant designation "450."

Memory: 32GB GDDR7
TGP: 600W
PCB: 14-layer
Power Design: 16+6+7 phase
Power Connector: 1x 12V-2×6
Interface: PCI Express 5.0×16

The "GB202" ASIC is surrounded by sixteen GDDR7 memory chips, which reportedly make the 32 GB memory size of the RTX 5090. The chip count, coupled with the large GPU package size (high pin-count), confirm that the "GB202" features a 512-bit wide memory bus. Assuming a memory speed of 28 Gbps, this memory bus should yield a stellar memory bandwidth of 1,792 GB/s. The GPU and memory are surrounded by the card's 24-phase VRM solution. This draws power from a single 16-pin 12V-2x6 power connector. nVidia will likely max out the 600 W continuous power-delivery capability of the connector, and give the card a TGP of around 500-550 W, if not more.

Izvor: TechPowerUp