N1 20SM vs Radeon Pro V620

Primary details

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

Place in the ranking	37	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	16.41	no data
Architecture	RDNA 2.0 (2020−2025)	Blackwell 2.0 (2025−2026)
GPU code name	Navi 21	GB20B
Market segment	Workstation	Laptop
Release date	4 November 2021 (4 years ago)	1 June 2026 (less than a year ago)

Detailed specifications

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

Pipelines / CUDA cores	4608	2560
Core clock speed	1825 MHz	741 MHz
Boost clock speed	2200 MHz	2346 MHz
Number of transistors	26,800 million	no data
Manufacturing process technology	7 nm	5 nm
Power consumption (TDP)	300 Watt	no data
Texture fill rate	633.6	375.4
Floating-point processing power	20.28 TFLOPS	12.01 TFLOPS
ROPs	128	24
TMUs	288	160
Tensor Cores	no data	80
Ray Tracing Cores	72	20
L0 Cache	1.1 MB	no data
L1 Cache	1 MB	2.5 MB
L2 Cache	4 MB	50 MB
L3 Cache	128 MB	no data

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	PCIe 5.0 x16
Length	267 mm	no data
Width	2-slot	no data
Supplementary power connectors	2x 8-pin	None

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	LPDDR5X
Maximum RAM amount	32 GB	128 GB
Memory bus width	256 Bit	256 Bit
Memory clock speed	2000 MHz	1067 MHz
Memory bandwidth	512.0 GB/s	273.2 GB/s
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	No outputs	1x HDMI
HDMI	-	+

API and SDK support

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

DirectX	12 Ultimate (12_2)	N/A
Shader Model	6.5	N/A
OpenGL	4.6	N/A
OpenCL	2.1	3.0
Vulkan	1.2	N/A
CUDA	-	12.1
DLSS	-	+

Pros & cons summary

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Recency	4 November 2021	1 June 2026
Maximum RAM amount	32 GB	128 GB
Chip lithography	7 nm	5 nm