AMD released the firm’s first RDNA 3 GPUs, the RX 7900 XTX and RX 7900 XT, on December 13. Nonetheless this hasn’t stopped the rumor mill from churning out knowledge pertaining to RDNA 4, a GPU structure that’s still better than a three hundred and sixty five days. This time, Paul from RedGamingTech has shared information concerning the RDNA 4 structure alongside with performance estimates for Navi 41, 42, and 43 SKUs.
Wait on in June, AMD shared that it’d be using an “Developed Node” for its RDNA 4 structure. The firm additionally printed that the Navi 4x GPUs would are within the market in 2024. This changed into the total knowledge that we got from AMD at the time. RedGamingTech has now detailed some early rumors concerning RDNA 4.
In line with Paul, RDNA 4 is a sign-fresh structure with far-reaching adjustments. One in all the splendid is the presence of a single Graphics Compute Die (GCD) that’s split into a lot of GCXs. Corresponding to RDNA 3, RDNA 4 can possess 128/64 Arithmetic Common sense Items (ALU) per Compute Unit (CU). There’ll allegedly be forty eight CUs and 3 Shader Engines (SE) per GCX. Nonetheless, the number can substitute looking on a bunch of components.
Additionally, Memory Cache Die (MCD) chips in RDNA 4 will reportedly lend a hand their reminiscence and cache controller feature with GDDR7 being historical rather then GDDR6. By task of cache, Paul mentions a mammoth enlarge in cache sizes, as effectively as third-gen Infinity Cache (IC) but the leaker doesn’t present any figures.
There would possibly maybe maybe well additionally be significant beneath-the-hood improvements within the task of fresh files prefetching, better machine dependency manager, Wave Matrix Multiply Earn (WMMA) model two that can maybe maybe tempo up performance per CU for sure instructions by 2x, and so forth. At final, as a consequence of the architectural improvements, AMD would possibly maybe maybe well also enlarge the sequence of skilled and server SKUs.
At final, Paul experiences that RDNA 4 will utilize PCIe 5 and the GCDs will be manufactured using TSMC’s 3 and 4 nm processes.
RDNA 4 performance estimate
The leaker alleges that RDNA 4 can possess a 50-60% performance/watt advantage over RDNA 3. Nonetheless he is “less confident” in this number, so preserve it with a grain of salt. The clock frequencies will reportedly survey an so much of uplift over the most up-to-date RDNA 3 boards as RDNA 4 would possibly maybe maybe well without considerations hit 3.5+ GHz equipped AMD meets its aim which is one thing the firm has supposedly didn’t enact with RX 7900 XT and RX 7900 XTX.
Moreover, RDNA 4’s performance targets additionally appear to be slightly ambitious with an anticipated enlarge of better than 2x vs RDNA 3. AI/ML performance would possibly maybe maybe well additionally survey a mammoth bump. Paul claims that Navi 41, a GPU that can maybe maybe well appear in a likely RX 8900 XT/XTX if AMD follows the most up-to-date naming draw, can possess double the performance of Navi 31 featured within the RX 7900 XT/XTX.
Navi 41, Navi 42, and Navi 43 specs
Navi 41, the flagship RDNA 4 GPU, will reportedly possess forty eight CUs per GCX and a total of three GCXs per GCD. This outcomes in 144 CUs for a fully-enabled Navi 41 GPU. As a comparability, the Navi 31 chip featured within the RX 7900 XTX has 96 CUs. The final ALU depend of Navi 41 would possibly maybe maybe well land at 18,432.
Transferring on to VRAM, the leaker mentions two likely configurations, a 4 MCD configuration with 32 GB of GDDR7 and a 6 MCD setup with 24/forty eight GB of GDDR7. Paul thinks that the 2d configuration is more likely.
Navi 42, which will likely be a tier below Navi 41, curiously has two GCXs ensuing in 96 CUs and 12,288 ALUs in total and 4 MCDs. The CU and ALU figures are such as Navi 31. Even then, Navi 42 would possibly maybe maybe well revel in a 2x performance enlarge over the unreleased Navi 32.
Navi 43, the weakest of the RDNA 4 lineup, will allegedly possess a single GCX for a total of forty eight CUs. There’ll be 2 MCDs with GDDR7 reminiscence. The performance aim of Navi 43 is such as its better-rupture brethren with a 2 cases performance enlarge over Navi 33.
Best likely time will present how valuable of the files equipped by RedGamingTech ends up being factual. We are at the starting of the RDNA 3’s lifecycle with a slew of AMD Radeon GPUs to quiz forward to. As such, it is simply too early to make investments on the closing specs and performance targets of RDNA 4. Therefore, preserve the files presented here as early rumors and nothing concrete.
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