T400 Mobile vs Radeon 820M

Primary details

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

Place in the ranking	676	not rated
Place by popularity	not in top-100	not in top-100
Architecture	RDNA 3.5 (2024−2025)	Turing (2018−2022)
GPU code name	Krackan Point	TU117
Market segment	Laptop	Laptop
Release date	March 2025 (1 year ago)	no data

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	128	896
Core clock speed	400 MHz	no data
Boost clock speed	2800 MHz	1425 MHz
Number of transistors	no data	4,700 million
Manufacturing process technology	4 nm	12 nm
Power consumption (TDP)	15 Watt	18 Watt
Texture fill rate	22.40	79.80
Floating-point processing power	0.7168 TFLOPS	2.554 TFLOPS
ROPs	4	32
TMUs	8	56
Ray Tracing Cores	2	no data
L0 Cache	32 KB	no data
L1 Cache	32 KB	no data
L2 Cache	1024 KB	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).

Laptop size	medium sized	no data
Interface	PCIe 4.0 x8	PCIe 3.0 x16
Supplementary power connectors	None	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	System Shared	GDDR6
Maximum RAM amount	System Shared	2 GB
Memory bus width	System Shared	64 Bit
Memory clock speed	System Shared	10 GB/s
Memory bandwidth	no data	80 GB/s
Shared memory	+	-

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

Portable Device Dependent

No outputs

API and SDK support

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

DirectX	12 Ultimate (12_2)	12 (12_1)
Shader Model	6.8	6.6
OpenGL	4.6	4.6
OpenCL	2.1	3.0
Vulkan	1.4	1.2
CUDA	-	7.5

Pros & cons summary

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Chip lithography	4 nm	12 nm
Power consumption (TDP)	15 Watt	18 Watt