Though AMD revealed its RDNA 3 structure in June, the chipmaker refused to share any specs relating to the next-generation graphics playing cards. Nevertheless, Angstronomics (opens in new tab) has shared new details about AMD’s latest Navi 3x silicon. The brand new outlet claims that the specs have been finalized in 2020 and no modifications have been made since. Nonetheless, deal with the data with some warning.
Angstronomics particulars three Navi 3x silicon: Navi 31, Navi 32, and Navi 33. Ranging from the biggest to the smallest, Navi 31 is the flagship silicon and touted because the world’s first GPU with a chiplet design. Navi 31, which carries the GFX1100 ID (codename Plum Bonito), reportedly options one Graphics Chiplet Die (GCD) with six accompanying Reminiscence Chiplet Dies (MCD). The publication believes that the GCD is on TSMC’s 5nm course of node whereas the MCD is a product of the 6nm course of node.
The GCD, which roughly measures 308 mm², homes as much as 48 Workgroup Processors (WGPs). If we break that down, every WGP has two compute models (CUs), that means that the Navi 31 die sports activities 96 CUs or 12,288 ALUs. Alternatively, the MCD is round 37.5 mm² in measurement. Every MCD has 16MB of AMD’s Infinity Cache so Navi 31-powered graphics playing cards will rock as much as 96MB of Infinity Cache. Navi 31 comes with a 384-bit reminiscence interface. Navi 31’s Infinity Cache is smaller than Navi 21, which has 128MB of Infinity Cache. Angstronomics reckons that AMD is prepping a 3D-stacked MCD (1-hi) that might double the Infinity Cache. Nonetheless, the efficiency uplift isn’t substational given the rise in price so mainstream Navi 31 will stick with 96MB. Actually, a beefed-up model with 288MB Infinity Cache (2-hi) was beforehand in AMD’s plans, however the chipmaker could have canned it because of the abysmal benefit-cost ratio.
As per Angstronomics’ data, AMD could provide a cut-down model of the Navi 31 SKU. The lesser variant could arrive with solely 42 WGPs (84 CUs or 10,752 ALUs). The silicon purportedly has one much less MCD, maxing out with a 80MB Infinity Cache configuration and a 320-bit reminiscence bus.
Barring any modifications, the Navi 31-based reference design seemingly sports activities an up to date triple-fan cooling system that is reasonably taller than the present Navi 21 design. The makeover additionally features a three red-stripe accent on the heatsink fins. By way of energy requirement, Navi 31 might do with simply two 8-pin PCIe energy connectors.
AMD RDNA 3 Specs*
| Navi 31 | Navi 32 | Navi 33 | |
|---|---|---|---|
| GFX ID | GFX1100 | GFX1101 | GFX1102 |
| Codename | Plum Bonito | Wheat Nas | Hotpink Bonefish |
| Design | Chiplet: 1x GCD, 6x MCD | Chiplet: 1x GCD, 4x MCD | Monolithic (TSMC N6, ~203 mm²) |
| GCD | TSMC N5, ~308 mm² | TSMC N5, ~200 mm² | N/A |
| MCD | TSMC N6, ~37.5 mm² | TSMC N6, ~37.5 mm² | N/A |
| WGPs | 48 | 30 | 16 |
| CUs | 96 | 60 | 32 |
| ALUs | 12,288 | 7,680 | 4,096 |
| Infinity Cache (MB) | 96 | 64 | 32 |
| Reminiscence Interface | 384-bit | 256-bit | 128-bit |
*Specs are unconfirmed.
Navi 32, aka GFX1101 (codename Wheat Nas) is the smaller model of Navi 31, concentrating on each cellular and desktop segments. The GCD and MCD measure 200 mm² and 37.5 mm², respectively. The GCD solely has 30 WGPs, amounting as much as 60 CUs (7,680 ALUs). The Navi 32 solely has 4 MCDs, limiting the Infinity Cache to 64MB. As soon as once more, it’s lower than Navi 22’s 96MB configuration. Angstronomics thinks that AMD contemplated a 128MB (1-hi) variant for Navi 32. The profit simply can’t justify the upper price In order that mannequin could not make it to the market.
Quite the opposite, Navi 33, GFX1102 (Hotpink Bonefish) sticks to a monolithic design, measuring round 203 mm² in die measurement. Based on Angstronomics‘ report, AMD had deliberate to make Navi 33 a chiplet die with 18 WGPs with two MCDs. Because the quantity and price didn’t meet AMD’s objectives, the chipmaker reportedly caught with a monolithic die.
We’ll see Navi 33 on each cellular and desktop graphics playing cards. Nevertheless, AMD’s precedence is to push Navi 33 on cellular units, particularly with the AMD Benefit initiative. Subsequently, laptops will get precedence over their desktop counterparts.
Navi 33 has 16 WGPs, which equals to 32 CUs (4,096 ALUs). Navi 33 boasts drop-in compatibility with Navi 23 PCBs, facilitating adoption amongst distributors. It has 32MB of Infinity Cache and a 128-bit reminiscence interface. Based on Angstronomics, Navi 33 outpeforms Intel’s highest-tier Arc Alchemist providing and instructions solely half the price of manufacturing whereas additionally being extra energy environment friendly.
AMD will launch the corporate’s high-end RDNA 3 graphics playing cards earlier than the top of the yr. Nvidia will compete with RDNA 3 with the brand new GeForce RTX 40-series lineup, rumored to launch in August or September.
