It turns out that the upcoming Radeon RX 7900 GRE (Golden Rabbit Edition) is built on the mysterious Navi 31 + Navi 32 hybrid GPU that's been in the news for a few weeks now. AMD has reportedly developed its answer to NVIDIA's AD103 silicon in the form of a new MCM that combines the 5 nm GCD of the "Navi 31," along with the substrate of the "Navi 32," which is physically smaller, and only has four 6 nm MCDs. This hybrid MCM could power AMD's mobile Radeon RX 7900 series. The chip physically only has a 256-bit wide GDDR6 memory interface. AMD felt the need for such a contraption as the "Navi 31" is likely too big for mobile platforms, and because the "Navi 32" GCD with its 60 CU (3,840 stream processors) might prove inadequate against a maxed out AD104 or cut-down AD103.

VideoCardz caught whiff of the new GPU by comparing the back sides of the Sapphire RX 7900 GRE from yesterday's leak, with that of the production Sapphire RX 7900 XT/XTX NITRO+. There are visible differences in the layout of the SMDs, and the reinforcement brace behind the GPU has a square cutout, compared to the rectangular one behind the "Navi 31" powering the RX 7900 XT/XTX NITRO+. On the RX 7900 GRE, the GCD is configured with 84 CU, or the same core-config as the RX 7900 XT, albeit with the narrower 256-bit memory interface, and 64 MB of Infinity Cache memory. It's highly likely that AMD uses this GPU to carve out the Radeon RX 7800 XT (with fewer than 84 but higher than 60 CU); while creating the RX 7800 with a maxed out "Navi 32," and the RX 7700 series with a cut-down "Navi 32" (including by narrowing the memory bus width to 192-bit by disabling one of the four MCDs). AMD is reportedly planning to launch the RX 7900 GRE in China, on July 28, 2023.

As we get closer to a possible late summer/early autumn release window for mid-range AMD Radeon RX 7000-series gaming graphics cards, more leaks have emerged from sources in Asia. Benchlife believes that "in addition to Radeon RX 7900 GRE, AMD and its AIB partners are also preparing two Navi 32 chip graphics cards such as Radeon RX 7800 XT and Radeon RX 7700 XT, which are expected to be available in early September." Previous leaks have indicated that a September launch is planned, albeit with the RX 7800 XT SKU being based on a heavily modified Navi 31 GPU.

Two non-XT units have recently emerged via leaked benchmark results, so there could be a good number of options lined up for a third quarter 2023 launch. Jon Peddle Research (JPR) has added their two cents, by reconfirming that Team Red could be showcasing mid-range models at a late summer trade fair: "AMD is rumored to announce two new 7000-series AIBs at Gamescom in late August. The leaks suggest that AMD is behind NVIDIA in terms of AIBs and has open slots in its SKU lineup. The leaked benchmark data (see below) indicates that the RX 7800 and RX 7700 may compete with the RTX 4070 and RTX 4060 Ti, respectively." JPR proposes that AMD is preparing at least two mid-range models for launch, although this could increase to five. If a mysterious fifth candidate does exist outside of the oft mentioned RX 7700, RX 7700 XT, RX 7800 and RX 7800 XT SKUs, where would it be placed in the hierarchy? We can exclude the RX 7900 16 GB GRE GPU since it seems to be a Chinese market exclusive, with performance estimated to be just below RX 7900 XT standards.

AMD is planning to plug the Atlantic gap between its mainstream Radeon RX 7600 and enthusiast-class RX 7900 XT with the RX 7800 series and RX 7700 series, with either an announcement or teaser planned for 2023 Gamescom, which is scheduled for August. There could be up to four new graphics card SKUs announced, with their product launches spread across Q3 and Q4 2023. The "Navi 32" MCM is expected to power at least three of these SKUs, while it was recently rumored that AMD could design a new GPU that has the GCD of the "Navi 31" on the package of "Navi 32" with its four MCDs, to end up with a higher CU count than what the "Navi 32" can offer.

The "Navi 32" GPU is an MCM, just like the "Navi 31" powering the RX 7900 series. It is rumored to feature a 5 nm GCD (graphics compute die) with 60 RDNA3 compute units, which work out to 3,840 stream processors, 120 AI accelerators, 60 Ray Accelerators, 240 TMUs, and possibly 128 ROPs. The four 6 nm MCDs give it 64 MB of Infinity Cache, and a 256-bit wide GDDR6 memory interface. Assuming the RX 7800 XT uses the unnamed new MCM with the GCD of the "Navi 31" that has a CU count somewhere between 60 and 72, a maxed-out "Navi 32" could power the RX 7800, while its cut-down variants power the RX 7700 XT and RX 7700.

AMD Radeon RX 7800 XT will be a much-needed performance-segment addition to the company's Radeon RX 7000-series, which has a massive performance gap between the enthusiast-class RX 7900 series, and the mainstream RX 7600. A report by "Moore's Law is Dead" makes a sensational claim that it is based on a whole new ASIC that's neither the "Navi 31" powering the RX 7900 series, nor the "Navi 32" designed for lower performance tiers, but something in between. This GPU will be AMD's answer to the "AD103." Apparently, the GPU features the same exact 350 mm² graphics compute die (GCD) as the "Navi 31," but on a smaller package resembling that of the "Navi 32." This large GCD is surrounded by four MCDs (memory cache dies), which amount to a 256-bit wide GDDR6 memory interface, and 64 MB of 2nd Gen Infinity Cache memory.

The GCD physically features 96 RDNA3 compute units, but AMD's product managers now have the ability to give the RX 7800 XT a much higher CU count than that of the "Navi 32," while being lower than that of the RX 7900 XT (which is configured with 84). It's rumored that the smaller "Navi 32" GCD tops out at 60 CU (3,840 stream processors), so the new ASIC will enable the RX 7800 XT to have a CU count anywhere between 60 to 84. The resulting RX 7800 XT could have an ASIC with a lower manufacturing cost than that of a theoretical Navi 31 with two disabled MCDs (>60 mm² of wasted 6 nm dies), and even if it ends up performing within 10% of the RX 7900 XT (and matching the GeForce RTX 4070 Ti in the process), it would do so with better pricing headroom. The same ASIC could even power mobile RX 7900 series, where the smaller package and narrower memory bus will conserve precious PCB footprint.

Harukaze5719 has brought attention to a curious registration of unreleased AsRock graphics cards at the Eurasian Economic Commission (ECC) regulatory office. The self-described (South) Korean PC Tech enthusiast has found out that ASRock is likely preparing for an imminent launch of custom design AMD Radeon RX 7800 XT PG 16 GB and RX 7800 XT PGW 16 GB models.

No specifications were found in the ECC registration, so it is too early to confirm whether the leaked RX 7800 XT series is based on AMD's RDNA 3 Navi 31 or Navi 32 GPU. Igor Lab's simulated a hypothetical version via the benchmarking of a workstation Radeon Pro W7800 (Navi 31) 32 GB graphics card. Model codes (registered on May 18 2023) indicate that the two AsRock Radeon RX 7800 XT models could sport the company's Phantom Gaming (PG) triple-fan cooling solution, possibly available in a standard shade or a (PGW) white option.

A bunch of unreleased AMD Radeon RX 7000 series graphics card have been spotted in ROCm 5.6 pull request, including the Radeon RX 7950 XTX, 7950 XT, 7800 XT, 7700 XT, 7600 XT, and 7500 XT. AMD has not yet launched its mainstream Radeon RX 7000 graphics cards, but according to the latest pull request, there are several unreleased graphics cards in for both high-end and mainstream segments. While the pull request has been removed from GitHub, it has been saved on Reddit. So far, it appears that AMD's RDNA 3 Radeon 7000 series lineup will be based on just three GPUs, Navi 33, Navi 32, and the Navi 31.

According to the list, we can expect a high-end refresh with Radeon RX 7950 XTX/XT version, also based on Navi 31 GPU. The list also shows that the Radeon RX 7800 series will be the only one based on the Navi 32 GPU, at least for now, while the Navi 33 GPU should cover the entire mainstream lineup, including the Radeon RX 7700 series, Radeon RX 7600 series, and the Radeon RX 7500 series. The list only includes XT versions, while non-XT should show up later, as it was the case with the Radeon RX 6000 series graphics cards. AMD's President and CEO, Dr. Lisa Su, already confirmed during Q1 2023 earnings call that mainstream Radeon RX 7000 series GPUs based on RDNA 3 architecture will launch during this quarter, and earlier rumors suggest we might see them at Computex 2023.

AMD's upcoming Radeon RX 7800 XT has made an appearance online, having been tested in Geekbench. The entire system appears to be some kind of internal test system at AMD, as it's listed as "Advanced Micro Devices X670_E7" on Geekbench. The system consists of an AMD Ryzen 9 7950X CPU paired with what should be 64 GB of RAM and oddly enough running Debian Linux. It's also entirely possible that this is a fake submission, which makes somewhat sense considering the weak performance. The Radeon RX 7800 XT was tested using the Vulkan test in Geekbench and you can find the numbers below.

Overall, the card scored 113,819 points in the Vulkan test, which is close to what an AMD Radeon RX 6700 XT scores on an older Ryzen 7 5700X system with 32 GB of RAM, so not too much should be read into the performance figures here. However, this gives us the first indication that AMD is readying its RX 7800 XT GPUs—assuming it's a real submission—which may or may not be announced at Computex later this month. However, there have been rumours that the RX 7800 XT has been pushed back, with the lower-end cards launching first, but we don't have long until we find out at least.