Radeon RX 6900 XTX: specs and benchmarks

Summary

AMD started Radeon RX 6900 XTX sales 28 October 2020. This is a desktop graphics card based on a RDNA 2.0 architecture and made with 7 nm manufacturing process. It is primarily aimed at gamer market. 16 GB of GDDR6 memory clocked at 2.25 GHz are supplied, and together with 256 Bit memory interface this creates a bandwidth of 576.0 GB/s.

Compatibility-wise, this is a dual-slot graphics card attached via PCIe 4.0 x16 interface. Its manufacturer default version has a length of 267 mm. Two 8-pin power connectors are required, and power consumption is at 330 Watt.

Primary details

Some basic facts about Radeon RX 6900 XTX: architecture, market segment, release date etc.

Place in the ranking	not rated
Place by popularity	not in top-100
Architecture	RDNA 2.0 (2020−2024)
GPU code name	Navi 21
Market segment	Desktop
Release date	28 October 2020 (4 years ago)

Detailed specifications

Radeon RX 6900 XTX's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of Radeon RX 6900 XTX's performance, but for precise assessment you have to consider its benchmark and gaming test results.

Pipelines / CUDA cores	5120	of 21760 (GeForce RTX 5090)
Core clock speed	2075 MHz	of 2670 MHz (Arc B580)
Boost clock speed	2435 MHz	of 3599 MHz (Radeon RX 7990 XTX)
Number of transistors	26,800 million	of 208,000 million (B200 SXM 192 GB)
Manufacturing process technology	7 nm	of 3 nm (Arc Graphics 140V)
Power consumption (TDP)	330 Watt	of 2400 Watt (Data Center GPU Max Subsystem)
Texture fill rate	779.2	of 2,554 (Radeon Instinct MI300X)
Floating-point processing power	24.93 TFLOPS	of 109.7 (GeForce RTX 5090)
ROPs	128	of 192 (Radeon RX 7900 XTX)
TMUs	320	of 1280 (Data Center GPU Max NEXT)
Ray Tracing Cores	80	of 170 (GeForce RTX 5090)

Form factor & compatibility

This section provides details about the physical dimensions of Radeon RX 6900 XTX and its compatibility with other computer components. This information is useful when selecting a computer configuration or upgrading an existing one. For desktop graphics cards, it includes details about the interface and bus (for motherboard compatibility) and additional power connectors (for power supply compatibility).

Interface	PCIe 4.0 x16
Length	267 mm
Width	2-slot
Supplementary power connectors	2x 8-pin

VRAM capacity and type

Parameters of memory installed on Radeon RX 6900 XTX: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated memory and use a shared part of system RAM instead.

Memory type	GDDR6
Maximum RAM amount	16 GB	of 294912 (Radeon Instinct MI325X)
Memory bus width	256 Bit	of 8192 Bit (Radeon Instinct MI250X)
Memory clock speed	2250 MHz	of 20000 (RTX 5000 Ada Generation Mobile)
Memory bandwidth	576.0 GB/s	of 5,171 GB/s (Radeon Instinct MI300X)

Connectivity and outputs

Types and number of video connectors present on Radeon RX 6900 XTX. As a rule, this section is relevant only for desktop reference graphics cards, since for notebook ones the availability of certain video outputs depends on the laptop model, while non-reference desktop models can (though not necessarily will) bear a different set of video ports.

Display Connectors	1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C
HDMI	+

API compatibility

APIs supported by Radeon RX 6900 XTX, sometimes including their particular versions.

DirectX	12 Ultimate (12_2)
Shader Model	6.7
OpenGL	4.6
OpenCL	2.1
Vulkan	1.3

Benchmark performance

Synthetic benchmark performance of Radeon RX 6900 XTX. The combined score is measured on a 0-100 point scale.

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