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AMD's Radeon RX 7900 GRE Gets Benchmarked

AMD's China exclusive Radeon RX 7900 GRE has been put through its paces by Expreview and the US$740 equivalent card should in short not carry the 7900-series moniker. In most of the tests, the card performs like a Raden RX 6950 XT or worse, with it being beaten by the Radeon RX 6800 XT in 3D Mark Fire Strike, even if it's only by the tiniest amount. Expreview has done a fairly limited comparison, mainly pitching the Radeon RX 7900 GRE against the Radeon RX 7900 XT and NVIDIA's GeForce RTX 4070, where it loses by a mile towards AMD's higher-end GPU, which by no means was unexpected as this is a lower tier product.

However, when it comes the GeForce RTX 4070, AMD struggles to keep up at 1080p, where NVIDIA takes home the win in games like The Last of US Part 1 and Diablo 4. In games like F1 22 and Assassin's Creed Hall of Valor, AMD is only ahead by a mere percentage point or less. Once ray tracing is enabled, AMD only wins in F1 22 and it's by less than one percent again and Far Cry 6, where AMD is almost three percent faster. Moving up in resolution, the Radeon RX 7900 GRE ends up being a clear winner, most likely partially due to having 16 GB of VRAM and at 1440p the GeForce RTX 4070 also falls behind in most of the ray traced game tests, if only just in most of them. At 4K the NVIDIA card can no longer keep up, but the Radeon RX 7900 GRE isn't really a 4K champion either, dropping under 60 FPS in more resource heavy games like Cyberpunk 2077 and The Last of Us Part 1. Considering the GeForce RTX 4070 Ti only costs around US$50 more, it seems like it would be the better choice, despite having less VRAM. AMD appears to have pulled an NVIDIA with this card, which at least performance wise, seems to belong in the Radeon RX 7800 segment. The benchmark figures also suggests that the actual Radeon RX 7800 cards won't be worth the wait, unless AMD prices them very competitively.

Update 11:45 UTC: [Editor's note: The official MSRP from AMD appears to be US$649 for this card, which is more reasonable, but the performance still places this in in a category lower than the model name suggests.]

AMD Radeon RX 7900 GRE ASIC Smaller than Navi 31, Slightly Larger than Navi 21

The GPU at the heart of the China-exclusive AMD Radeon RX 7900 GRE (Golden Rabbit Edition) sparked much curiosity. It is a physically different GPU from the one found in desktop Radeon RX 7900 XT and RX 7900 XTX graphics cards. AMD wouldn't go through all that effort designing a whole different GPU just for a limited edition graphics card, which means this silicon could find greater use for the company—for example, this could be the package AMD uses for its upcoming mobile RX 7900 series. AMD wouldn't go through all the effort designing a first-party MBA (made by AMD) PCB for the silicon just for the RX 7900 GRE, and so this PCB, with this particular version of the "Navi 31" silicon, could see a wider global launch, probably as the rumored Radeon RX 7800 XT, or something else (although with a different set of specs from the RX 7900 GRE).

We compared the sizes of the new "Navi 31" package found in the RX 7900 GRE, with those of the regular "Navi 31" powering the RX 7900 XT/XTX, the previous-generation "Navi 21" powering the RX 6900 XT, and the NVIDIA AD103 silicon powering the desktop GeForce RTX 4080. There are some interesting findings. The new smaller "Navi 31" package is visibly smaller than the one powering the RX 7900 XT/XTX. It is a square package, compared to the larger rectangular one, and has a significantly thinner metal reinforcement brace. What's interesting is that the 5 nm GCD is still surrounded by six 6 nm MCDs. We don't know if they've disabled two of the six MCDs, or whether they're dummies. AMD uses dummy chiplets as structural reinforcement in some of its EPYC server processors. The dummies spread some of the mounting pressure applied by the IHS or cooling solution, so the logic behind surrounding the GCD with six of these MCDs could be the same.

AMD Radeon RX 7900 GRE Configured with 80 CU?

AMD's upcoming China-exclusive Radeon RX 7900 GRE (Golden Rabbit Edition) graphics card is reportedly configured with 80 compute units (CU), and not the previously thought 84, according to a leaked TechPowerUp GPU-Z screenshot. While GPU-Z 2.54.0 isn't fully aware of the RX 7900 GRE, and can get some hard-coded details (such as release dates) wrong, since it has the ability to detect "Navi 31" and the RX 7900 series, it is able to count the compute units.

The screenshot describes the RX 7900 GRE as featuring 80 CU, or 5,120 stream processors—the same count as the previous-gen RX 6900 XT, but based on the newer RDNA3 graphics architecture. Also detected are a TMU count of 320, ROP count of 80 (a vast reduction from the 192 available on the silicon, if true). We've known from older reports that the RX 7900 GRE is configured with a 256-bit wide GDDR6 memory interface, holding 16 GB of video memory. What's new is that while the RX 7900 XT and RX 7900 XTX use 20 Gbps memory, the RX 7900 GRE is given slower 18 Gbps memory, as detected by GPU-Z. This results in a memory bandwidth of 576 GB/s, a significant reduction from the 960 GB/s enjoyed by the RX 7900 XTX.

AMD Radeon RX 7900 GRE Could be Introduced at ChinaJoy 2023 Conference

AMD's Chinese office has announced that company representatives will be present at this year's ChinaJoy event—their Weibo social media account confirmed that: "from July 28th to July 31st, 2023, in Hall E6 of Shanghai New International Expo Center, super hardcore and mega cool AMD hardware will be on the scene, bringing you a fast and fun gaming experience. We are looking forward to meeting you!" ITHome thinks that the timing of this announcement points to a possible official unveiling of the Radeon RX 7900 GRE (Golden Rabbit Edition) on the showroom floor.

The publication has cited a tip provided by the one and only momomo_us—the Chinese market exclusive Golden Rabbit Edition will be released tomorrow, which lines up with ChinaJoy 2023's kick off time. Recent leaks have revealed that the 84 Compute Units + 16 GB configured graphics card is a new SKU, sitting below the RX 7900 XT in Team Red's Radeon RDNA 3 hierarchy. It seems to be "built on the mysterious Navi 31 + Navi 32 hybrid GPU." Additionally, ITHome reports that AMD has partnered up with ASUS, and will be exhibiting ROG Moba 7 Plus series laptops (sporting Ryzen Dragon Range APUs) at the Shanghai event.

Radeon RX 7900 GRE Confirmed to Debut New Navi 3X GPU

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.

Sapphire Radeon RX 7900 GRE Pictured: A Unique China-specific SKU

Here are some of the first pictures of the Sapphire Radeon RX 7900 GRE, a unique China-specific product that isn't just its own Sapphire custom-design, but also a whole different SKU. We first learned about the existence of the RX 7900 GRE earlier this month, and this would be one of its first custom design implementations. The Golden Rabbit Edition (GRE), is a limited edition SKU of the Radeon RX 7900 series. It's neither the RX 7900 XTX nor the RX 7900 XT, but positioned a notch below the latter. Based on the same "Navi 31" silicon as the two, the RX 7900 GRE is equipped with 84 CU (5,376 stream processors), or the same GCD core-configuration as the RX 7900 XT. It however, gets just 16 GB of memory, across a narrower 256-bit wide memory bus.

The Radeon RX 7900 GRE is carved out of the "Navi 31" by disabling two of the six MCDs, which reduces the Infinity Cache size to 64 MB, and the GDDR6 memory bus width to 256-bit. The 5 nm GCD is carried over from the RX 7900 XT—you get 5,376 stream processors, 168 AI accelerators, 84 Ray accelerators, 336 TMUs, and 192 ROPs. It is possible that the Sapphire RX 7900 GRE uses a variation of the company's NITRO+ cooling solution that's similar to the NITRO+ Lite SKUs available in markets outside China. The key difference here is that the cooler lacks a vapor-chamber plate, and instead uses a solid copper base-plate to pull heat from the GPU and memory. AMD needs to fill the vast gap in its product stack between the $250 RX 7600 and the $700+ RX 7900 XT, and SKUs such as the RX 7900 GRE could help it compete better against the likes of the RTX 4070 Ti in competitive markets such as China.
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