AMD Radeon RX 7800 XT and 7700 XT: With lots of memory in the upper class

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AMD completes its RDNA3 graphics cards for gamers with the long-awaited Radeon RX 7800 XT and RX 7700 XT models for smooth gaming in WQHD resolution. This will be used to attack Nvidia’s GeForce models RTX 4060 Ti 16 GB and RTX 4070 from September 6th. AMD equips them with 12 or 16 GB of GDDR6 graphics memory. The Radeon RX 7800 XT will cost 549 euros, the RX 7700 XT will be available from 489 euros. At the start there will already be cards from all of AMD’s well-known board partners, including Asus, Asrock, Gigabyte, MSI, Powercolor, Sapphire and XFX.

The two new cards are positioned between the mid-range Radeon RX 7600 card and the high-end Radeon RX 7900 models. AMD is once again using chiplet technology consisting of a 5 nm graphics compute die and several memory cache dies manufactured using cheaper 6 nm technology. The same chip combination is used as in the Radeon Pro W7800. Like all RDNA3 GPUs, the Radeon RX 7800 XT and 7700 XT support DirectX 12 Ultimate, DirectML, Vulkan, OpenCL and OpenGL.

DisplayPort 2.1 (3x) and HDMI 2.1 (1x) are also on board, so that Hi-Res or Hi-Refresh screens are optimally provided. The video hardware is also state-of-the-art, the decoders and encoders support the modern, license-free AV1. AMD equips both cards with two eight-pin connectors to feed the TDPs of 245 and 263 watts.

AMD wants to make the cards attractive to interested buyers with a bundle with Starfield, which will appear on the same September 6th as the new Radeons.

Navi32 chip combination: 1 GCD and up to four MCDs.

(Image: AMD)

Navi32 with chiplets

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The Navi32 package has a GCD with 28.1 billion transistors and a maximum of four MCDs, each with 64 bits and 16 MB. When fully expanded, the configuration has 60 compute units (3840 shader cores) and 256 parallel data lines to the memory. These are supported by a 64 MB last-level cache, which AMD calls Infinity Cache. The Radeon RX 7700 XT, on the other hand, is trimmed back a bit and only has 54 compute units (3456 shaders) and a 192-bit interface to the GDDR6 memory. Because the MCD was switched off, its 16 MB LLC are also missing, so that the 7700 XT only has 48 MB. The previous generation Radeon RX 6000 still had significantly larger LL caches. The XT of the (6)700 series over 96 MB, the (6)800 even over 128 MB – AMD wants to compensate for this shortcoming with the higher speed of the RNDA3 caches.

Graphics card Radeon RX 7700 XT Radeon RX 7800 XT Radeon RX 7900 GRE Radeon RX 7900 XT Radeon RX 7900 XTX Compute Units / RT cores 54 60 80 84 96 Shader cores 3456 3840 5120 5376 6144 basic / game / boost beat – / 2171 / 2544 GHz – / 2124 / 2430 GHz 1.27 / 1.88 / 2.25 GHz 1.5 / 2.0 / 2.4 GHz 1.9 / 2.3 / 2.5 GHz FP32 processing power (Game clock) 30.0 TFlops 32.6 TFlops 38.5 TFlops 43 TFlops 56.5 TFlops Standard memory configuration 12 GB GDDR6 16 GB GDDR6 16 GB GDDR6 20 GB GDDR6 24 GB GDDR6 Memory connection 432 GB/s, 192 bit 624 GB/s, 256-bit 576 GB/s, 256-bit 800 GB/s, 320-bit 960 GB/s, 384-bit last-level cache 48 MB 64 MB 64 MB 80 MB 96 MB TDP 245 watts 263 watts 260 watts 315 watt 355 watt price 489 euros (RRP) 549 euros (RRP) 649 USD (RRP, ~705 euros) from 800 euros (retail) from 950 euros (retail)

AMD HyperRX: FSR3 and AFMF in the driver

In the course of the presentation of the two new Radeon cards, AMD promised that the long-awaited FSR3 should finally come from September. FSR3 combines the upscaling technology Fidelity FX Super Resolution with AMD Fluid Motion Frames (AFMF), an image generation that calculates intermediate frames in games based on the motion vectors of preceding frames. The first titles are said to be Immortals of Aveum and Forspoken, followed by Cyberpunk 2077, Crimson Desert and Warhammer Space Marine.

AMD not only wants to use FSR3 including AFMF as a sales argument for the RX 7000 series, but also, unlike Nvidia with the DLSS3 model with frame generation, also want to make this technology accessible to owners of Radeon RX 6000 cards.

In addition, image generation as part of HypeRX, which combines anti-lag, Radeon Boost and FSR3, should migrate to the driver from the first quarter of 2023 and make the technology for DirectX 11 and 12 games generally available and without special support for the games. This would give AMD Nvidia a big selling point.

(csp)

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