AMD today announced the next generation of desktop graphics cards. The company today revealed two new flagships Radeon RX 7900 XTX and RX 7900 XT.
Based on the new RDNA 3 architecture, the new 7000 series GPU from AMD is the world’s first chiplet-based design. A GPU die has two main components, the graphics computation die or GCD and the memory cache die or MCD. The GCD is built using the new 5nm manufacturing process, while the MCD uses the older 6nm process.
Switching to a chiplet-based design allows AMD to mix and match components for different configurations. It also allows them to use different production processes for each component. The smaller parts also have a better yield than making a large monolithic die, which helps the company to produce these parts more cheaply and efficiently.
A look at the new GCD reveals the new RDNA 3 compute units, a new display engine and a new dual media engine. Each compute unit has 1.5x VGPR (Vector General Purpose Register), 64 dual-edition stream processors with 2x learning rate, 2x AI accelerators for 2.7x performance, and a 2nd Gen RT accelerator for 50% more performance per CU. The new MCD features a 64-bit memory controller and 2nd Gen Infinity Cache for 2.7x higher memory bandwidth.
Now moving on to the cards, RX 7900 XTX can be powered by 96 compute units, 2.3GHz gaming clock, 24GB GDDR6 384-bit memory with 96MB Infinity Cache and 355W board power limit with two 8-pin connectors.
Meanwhile, the 7900 XT has 84 compute units, a 2.0GHz game clock, 20GB GDDR6 320-bit memory with 80MB Infinity Cache and a 300W board power limit.
Both cards support the new DisplayPort 2.1 standard, which is limited to a medium UHBR 13.5 bandwidth of 54Gbps, as well as a new media engine with simultaneous encode/decode for AVC/HEVC and 8K60 AV1 encode/decode.
AMD had surprisingly few first-party benchmarks to show this time around. The 7900 XTX is said to be up to 1.7x faster in pure rasterization and up to 1.6x faster in 4K compared to the 6950 XT. No numbers were given on the competition or for the 7900 XT.
The 7900 XTX is priced at $999 and the 7900 XT is priced at $899. Available December 13.