Radeon R5 340X OEM vs RX 455 OEM

Primary details

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

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	GCN 2.0 (2013−2017)	GCN 1.0 (2011−2020)
GPU code name	Tobago	Oland
Market segment	Desktop	Desktop
Release date	30 June 2016 (8 years ago)	5 May 2015 (9 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	768	384
Core clock speed	1050 MHz	900 MHz
Boost clock speed	no data	1050 MHz
Number of transistors	2,080 million	950 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	100 Watt	65 Watt
Texture fill rate	50.40	21.60
Floating-point processing power	1.613 TFLOPS	0.6912 TFLOPS
ROPs	16	8
TMUs	48	24

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 3.0 x8
Length	165 mm	145 mm
Width	1-slot	1-slot
Supplementary power connectors	1x 6-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	GDDR5	DDR3
Maximum RAM amount	2 GB	2 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	1625 MHz	1000 MHz
Memory bandwidth	104.0 GB/s	16 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, 1x DisplayPort	1x DVI, 1x DisplayPort
HDMI	+	-

API compatibility

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

DirectX	12 (12_0)	12 (11_1)
Shader Model	6.3	5.1
OpenGL	4.6	4.6
OpenCL	2.0	1.2
Vulkan	1.2.131	1.2.131

Pros & cons summary

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Recency	30 June 2016	5 May 2015
Power consumption (TDP)	100 Watt	65 Watt

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