Radeon HD 4855 vs RX 460 1024SP

General info

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

Place in performance ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	GCN 4.0 (2016−2020)	TeraScale (2005−2013)
GPU code name	Baffin	RV770
Market segment	Desktop	Desktop
Release date	17 January 2017 (7 years ago)	3 January 2010 (14 years ago)

Technical specs

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	1024	640
Core clock speed	1090 MHz	575 MHz
Boost clock speed	1200 MHz	no data
Number of transistors	3,000 million	956 million
Manufacturing process technology	14 nm	55 nm
Power consumption (TDP)	75 Watt	110 Watt
Texture fill rate	76.80	18.40
Floating-point performance	2,458 gflops	736.0 gflops

Size and 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 x8	PCIe 2.0 x16
Length	170 mm	220 mm
Width	2-slot	2-slot
Supplementary power connectors	None	1x 6-pin

Memory

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	GDDR5
Maximum RAM amount	2 GB	512 MB
Memory bus width	128 Bit	256 Bit
Memory clock speed	7000 MHz	3600 MHz
Memory bandwidth	112.0 GB/s	115.2 GB/s

Video outputs and ports

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 HDMI, 1x VGA
HDMI	+	+

API support

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

DirectX	12 (12_0)	10.1 (10_1)
Shader Model	6.4	4.1
OpenGL	4.6	3.3
OpenCL	2.0	1.1
Vulkan	1.2.131	N/A

Advantages and disadvantages

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Recency	17 January 2017	3 January 2010
Maximum RAM amount	2 GB	512 MB
Chip lithography	14 nm	55 nm
Power consumption (TDP)	75 Watt	110 Watt

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