AMD could be working on separate Navi 3X GPU with 16,384 stream processors

nanoguy

Posts: 1,243   +24
Staff member
Rumor mill: We're still months away from the expected launch of AMD's first RDNA 3 cards, and the rumors around them are intensifying. Leakers are now saying the Navi 31 GPU will have fewer stream processors than previously expected, suggesting there will be a different full-fat Navi 3X GPU that will land in 2023 that might not necessarily be a gaming product.

AMD is expected to launch the first Radeon RX 7000 series graphics card sometime in October or November, but there have been conflicting rumors about the exact specs of the new card.

Official information about the RDNA 3 architecture is also limited. AMD says its upcoming GPUs will have a 50 percent performance per watt uplift when compared to the current generation, mostly afforded by a transition to a 5nm process technology from TSMC.

The company also confirmed rumors that RDNA 3 hardware will feature advanced chiplet packaging, Infinity Cache, and a redesigned compute unit. The flagship RX 7000 series GPU (Navi 31) was previously rumored to have 16,384 stream processors spread across two Graphic Complex Dies (GCDs). Recently, leakers have been posting a different story — only 12,288 cores contained in a single GCD.

This could be a last-minute design change or a sign that leakers have been fed old or incorrect information. That said, Greymon55 says there may still be a separate GPU with 16,384 stream processors in the works, although it's not yet clear whether it will be a consumer product or a workstation graphics solution (like a Radeon Pro card).

Either way, this is expected to carry a Navi 3X moniker and will likely arrive sometime in 2023. If it's not a gaming card, AMD may have decided to test the dual-GCD configuration in workstation hardware before eventually using it in consumer Radeon products, possibly as soon as RDNA 4 (Navi 4X).

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NeoMorpheus

Posts: 1,174   +2,397
bd5e07eaaa1a69eaad755c08221a3c546f42e7519c62029f2f81d68c6187d007.jpg
 

passwordistaco

Posts: 339   +790
6900XT with the full Navi21 has 5120 stream processors. Even with a "reduced" 12288, Navi31 will be a beast. How many watts, though?
 

Gars

Posts: 316   +29
If5120=350w[max]
12288=840w
pure speculating, but...
last article for nVidia was about the same watting /if
right?
/maybe I misreading something/
 

passwordistaco

Posts: 339   +790
If5120=350w[max]
12288=840w
pure speculating, but...
last article for nVidia was about the same watting /if
right?
/maybe I misreading something/
50% more perf/watt. 2/3 power for the same performance per stream processor, so maybe 560W?
 

dangh

Posts: 663   +1,040
If5120=350w[max]
12288=840w
pure speculating, but...
last article for nVidia was about the same watting /if
right?
/maybe I misreading something/
Won't be there a node change as well reducing power consumption by quite a bit?
 

kinetix

Posts: 37   +37
I think that if AMD plans to improve the ray tracing aspect of RDNA 3, it should be focusing on three aspects
-double at least the number of ray-triangle intersection operations
-increase the amount of registers or create a certain number of separate registers dedicated to RT...
-... and thereby decouple the RT from the shaders a bit more, allowing more concurrency.

this should nearly double the ability to perform RT on RDNA 3