Radeon RX 7000 Series

The Radeon RX 7000 series is a series of graphics processing units developed by AMD, based on their RDNA 3 architecture. It was announced on November 3, 2022 and is the successor to the Radeon RX 6000 series. Currently AMD has announced two graphics cards of the 7000 series, RX 7900 XT and RX 7900 XTX. AMD officially launched the RX 7900 XT and RX 7900 XTX on December 13, 2022.

Radeon RX 7000 series features

* RDNA 3 microarchitecture
* Up to 96 Compute Units (CU) compared to the maximum of 80 in the RX 6000 series
* New dual-issue shaders in each CU with the ability to execute two instructions per cycle
* First consumer graphics card to be based on a chiplet design
** TSMC N5 for
** TSMC N6 for
* Up to 24GB of GDDR6 memory
* Doubled L1 cache from 128 KB to 256 KB per array
* 50% increased L2 cache from 4 MB to 6 MB maximum
* Second-generation Infinity Cache with up to 2.7x peak bandwidth and up to 96MB in capacity
* PCIe 4.0 x16 interface
* Second-generation Ray tracing accelerators
* Added dedicated AI accelerators
* Support for AV1 hardware encoding and decoding for 12-bit video up to 8K60
* New "Radiance Display" Engine with:
** DisplayPort 2.1 UHBR 13.5 support (up to 54 Gbps bandwidth)
** HDMI 2.1a support (up to 48 Gbps bandwidth)
** Support up to 8K 165 Hz or 4K 480 Hz output with DSC
** 12-bit color and Rec. 2020 support for HDR

Navi 3x Dies

Navi 31

The Navi 31 die features 58 billion transistors, a 165% increase in transistor density than the previous generation Navi 2x. The full Navi 31 die contained 12,288 FP32 cores, equivalent to 6144 Stream Processors. Reportedly, the Navi 31 die has been designed to scale up to 3GHz frequency, though AMD's Radeon RX 7900 XTX reference design can hit a boost frequency of 2.5GHz. The Navi 31 die is fabricated on TSMC's N5 process node.

Products

Issues

Idle power usage

Abnormally high power draw while at idle was observed with the Radeon RX 7900 XTX and RX 7900 XTX when using select high resolution, high refresh rate displays and when the GPU is decoding video. ''ComputerBase'' discovered that the RX 7900 XT and RX 7900 XTX drew a respective 71W and 80W when decoding and playing a 4K 60FPS YouTube video compared to the 30W used by the RX 6900 XT for the same task. AMD acknowledged the issue and it was added to the list of known isues to be addressed with future updates to drivers and Radeon Adrenalin software. On December 22, 2022, Adrenalin Edition 22.12.2 was released and its RDNA 3-exclusive driver significantly reduced the GPU's power usage at idle and when decoding video.

Reference card temperature issues

AMD's reference editions of the Radeon RX 7900 XTX and RX 7900 XTX have suffered from high temperatures of up to 109°C on the GPU hot spot. AIB partner cards were reportedly not affected. The noisy fans and thermal throttling on reference cards coud be as a result of poor contact between the reference cooler and the GPU chiplets. ''HardwareLuxx'' instead considered that the direct die cooling used for the Navi 31 chiplets could be difficult due to uneven contact pressure across the seven dies even if they may look to be level. AMD issued a statement in December 2022 that it was investigating the issue.

See also

* Radeon RX 5000 series - based on first implementation of RDNA architecture
* Radeon RX 6000 series - AMD's predecessor to Radeon RX 7000 series (RDNA 2 based)
* Radeon Pro - AMD's workstation graphics solution
* List of AMD graphics processing units
* GeForce 40 series - competing Nvidia architecture releasing in a similar time-frame

References

External links

Official website

{{AMD graphics

Computer-related introductions in 2022
AMD graphics cards
Graphics processing units
Graphics cards