Radeon R9 M290X Mac Edition vs HD 8870 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 1.0 (2012−2020)	GCN 1.0 (2012−2020)
GPU code name	Pitcairn	Pitcairn
Market segment	Desktop	Laptop
Release date	8 January 2013 (13 years ago)	23 November 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	1280	1024
Core clock speed	1000 MHz	850 MHz
Boost clock speed	no data	975 MHz
Number of transistors	2,800 million	2,800 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	175 Watt	80 Watt
Texture fill rate	80.00	62.40
Floating-point processing power	2.56 TFLOPS	1.997 TFLOPS
ROPs	32	32
TMUs	80	64
L1 Cache	320 KB	256 KB
L2 Cache	512 KB	512 KB

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 x16
Length	241 mm	no data
Width	2-slot	no data
Supplementary power connectors	2x 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	GDDR5
Maximum RAM amount	2 GB	2 GB
Memory bus width	256 Bit	256 Bit
Memory clock speed	1200 MHz	1365 MHz
Memory bandwidth	153.6 GB/s	174.7 GB/s

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	1x DVI, 1x HDMI, 2x mini-DisplayPort	No outputs
HDMI	+	-

API and SDK support

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

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

Pros & cons summary

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Recency	8 January 2013	23 November 2014
Power consumption (TDP)	175 Watt	80 Watt