Radeon R5 A320 vs ATI HD 4870

Primary details

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

Place in the ranking	716	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.27	no data
Power efficiency	1.64	no data
Architecture	TeraScale (2005−2013)	GCN 1.0 (2011−2020)
GPU code name	RV770	Jet
Market segment	Desktop	Desktop
Release date	25 June 2008 (16 years ago)	2015 (9 years ago)
Launch price (MSRP)	$299	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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	800	320
Core clock speed	750 MHz	750 MHz
Boost clock speed	no data	825 MHz
Number of transistors	956 million	690 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	150 Watt	no data
Texture fill rate	30.00	16.50
Floating-point processing power	1.2 TFLOPS	no data
ROPs	16	8
TMUs	40	20

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 2.0 x16	PCIe 3.0 x8
Length	250 mm	no data
Width	2-slot	no data
Supplementary power connectors	2x 6-pin	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	GDDR5	DDR3
Maximum RAM amount	1 GB	1 GB
Memory bus width	256 Bit	64 Bit
Memory clock speed	900 MHz	2 GB/s
Memory bandwidth	115.2 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

2x DVI, 1x S-Video

Portable Device Dependent

API compatibility

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

DirectX	10.1 (10_1)	12 (11_1)
Shader Model	4.1	6.5 (5.1)
OpenGL	3.3	4.6
OpenCL	1.1	2.1 (1.2)
Vulkan	N/A	1.2.170

Pros & cons summary

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Chip lithography

55 nm

28 nm

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