Radeon Steam Deck 8CU vs RX 5900

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	not rated	485
Place by popularity	not in top-100	not in top-100
Architecture	RDNA 2.0 (2020−2025)	RDNA 2 (2022−2023)
GPU code name	Navi 21	RDNA 2 Sephiroth
Market segment	Desktop	Laptop
Release date	no data	9 November 2023 (2 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	4096	512
Boost clock speed	1635 MHz	1900 MHz
Number of transistors	21,000 million	no data
Manufacturing process technology	7 nm	6 nm
Power consumption (TDP)	300 Watt	no data
Texture fill rate	418.6	no data
Floating-point processing power	13.39 TFLOPS	no data
ROPs	96	no data
TMUs	256	no data
L1 Cache	no data	512 KB
L2 Cache	no data	1 MB

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 4.0 x16	no data
Width	2-slot	no data
Supplementary power connectors	2x 8-pin	no data

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	GDDR6	no data
Maximum RAM amount	12 GB	no data
Memory bus width	384 Bit	no data
Memory clock speed	14000 MHz	no data
Memory bandwidth	672.0 GB/s	no data
Shared memory	-	+
Resizable BAR	+	-

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors	1x HDMI, 3x DisplayPort	no data
HDMI	+	-

API and SDK support

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

DirectX	12 Ultimate (12_1)	12_1
OpenGL	4.6	no data

Pros & cons summary

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Chip lithography

7 nm

6 nm