Radeon R9 M270 vs 840M

Primary details

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

Place in the ranking	518	not rated
Place by popularity	not in top-100	not in top-100
Architecture	RDNA 3.5 (2024−2025)	GCN (2012−2015)
GPU code name	Krackan Point	no data
Market segment	Laptop	Laptop
Release date	March 2025 (1 year ago)	1 April 2014 (11 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	256	640
Core clock speed	400 MHz	725 MHz
Boost clock speed	2900 MHz	no data
Number of transistors	no data	1500 Million
Manufacturing process technology	4 nm	28 nm
Power consumption (TDP)	15 Watt	no data
Texture fill rate	46.40	no data
Floating-point processing power	1.4848 TFLOPS	no data
ROPs	8	no data
TMUs	16	no data
Ray Tracing Cores	4	no data
L0 Cache	64 KB	no data
L1 Cache	64 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	large
Interface	PCIe 4.0 x8	no data
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	GDDR5
Maximum RAM amount	System Shared	4 GB
Memory bus width	System Shared	128 Bit
Memory clock speed	System Shared	4500 MHz
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 data

API and SDK support

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

DirectX	12 Ultimate (12_2)	12 (FL 11_1)
Shader Model	6.8	no data
OpenGL	4.6	no data
OpenCL	2.1	no data
Vulkan	1.4	-

Pros & cons summary

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Chip lithography

4 nm

28 nm