Radeon RX 6900 vs RX 580 2048SP

Place in the ranking	276	22
Place by popularity	52	not in top-100
Power efficiency	9.11	18.66
Architecture	GCN 4.0 (2016−2020)	RDNA 2.0 (2020−2024)
GPU code name	Polaris 20	Navi 21
Market segment	Desktop	Desktop
Release date	15 October 2018 (6 years ago)	28 October 2020 (4 years ago)

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	2048	4608
Core clock speed	1168 MHz	no data
Boost clock speed	1284 MHz	2105 MHz
Number of transistors	5,700 million	23,000 million
Manufacturing process technology	14 nm	7 nm
Power consumption (TDP)	150 Watt	255 Watt
Texture fill rate	164.4	606.2
Floating-point processing power	5.259 TFLOPS	19.4 TFLOPS
ROPs	32	64
TMUs	128	288

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Interface	PCIe 3.0 x16	PCIe 4.0 x16
Length	241 mm	no data
Width	2-slot	2-slot
Supplementary power connectors	1x 8-pin	2x 8-pin

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	GDDR6
Maximum RAM amount	8 GB	16 GB
Memory bus width	256 Bit	256 Bit
Memory clock speed	1750 MHz	16 GB/s
Memory bandwidth	224.0 GB/s	512.0 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	1x DVI, 1x HDMI, 3x DisplayPort	1x HDMI, 2x DisplayPort, 1x USB Type-C
HDMI	+	+

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (12_0)	12 Ultimate (12_2)
Shader Model	6.4	6.5
OpenGL	4.6	4.6
OpenCL	2.0	2.0
Vulkan	1.2.131	1.2

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

RX 580 2048SP 19.93

RX 6900 69.42
+248%

Passmark

This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

RX 580 2048SP 7681

RX 6900 26751
+248%

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	19.93	69.42
Recency	15 October 2018	28 October 2020
Maximum RAM amount	8 GB	16 GB
Chip lithography	14 nm	7 nm
Power consumption (TDP)	150 Watt	255 Watt

RX 580 2048SP has 70% lower power consumption.

RX 6900, on the other hand, has a 248.3% higher aggregate performance score, an age advantage of 2 years, a 100% higher maximum VRAM amount, and a 100% more advanced lithography process.

The Radeon RX 6900 is our recommended choice as it beats the Radeon RX 580 2048SP in performance tests.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.