The huge image: Graphics playing cards based mostly on AMD’s new RDNA3 structure are rumored to debut later this 12 months. The flagship Radeon RX 7900 XT will reportedly function a Multi-Chip-Module (MCM) GPU design with 384 MB of Infinity Cache and a staggering 24 GB of GDDR6 reminiscence.
Both AMD and Nvidia are anticipated to launch their next-gen graphics playing cards later this 12 months. We’ve already had loads of leaks involving Nvidia’s GPUs, so as we speak, we’re specializing in information involving AMD’s upcoming RDNA3-based playing cards.
Judging by previous releases, AMD might be going to announce the higher-end fashions first, that are going to be based mostly on the Navi 31 GPU. Rumors are that it’ll function a 384-bit reminiscence bus, and it’ll ship with as much as 24 GB of VRAM. Assuming that the corporate will use 18 Gbps GDDR6 modules once more, this might end in a reminiscence bandwidth of 864 GB/s.
You ought to replace to 128bit-256bit-384bit
— Greymon55 (@greymon55) May 18, 2022
We already knew that the GPU would possibly function an MCM design, however as an alternative of that includes a number of GCDs (Graphics Compute Dies) as beforehand thought, AMD will reportedly use six MCDs (Memory Compute Dies) with one huge GCD.
What this implies is that every MCD will function 64 MB of L3 cache, combining for a complete of 384 MB of what AMD calls Infinity Cache. That is thrice greater than the monolithic Navi 21 GPU. Splitting the GPU up into a number of dies might additionally enhance yields, leading to decrease manufacturing prices.
RDNA3 design based mostly on the most recent rumors/leaks.
– 1 GCD 5nm, 2x FP32 cores, 1xFP16 cores, 3ghz, 40% die measurement discount.
– 386MB L3 64MBx6 MCD @ 4TB/s through TSMC CoWoS IO cloth.
– 24GB GDDR6 @ 768GB/s
— AMDGPU (@AMDGPU_) May 17, 2022
The GCD can be fabricated on certainly one of TSMC’s 5nm course of nodes, with the MCDs relegated to a 6nm node. AMD’s Zen 3 CPUs use an identical design, because the I/O dies use a less-advanced GlobalFoundries course of.
The Radeon RX 7900 XT might be going to be the highest-end SKU based mostly on the Navi 31 (at the least till a refresh arrives). It’ll reportedly arrive within the third or fourth quarter, with rumors placing its gaming efficiency at over twice that of the 6900XT.