Radeon R9 M390 Mac Edition vs GeForce GTX 660 Ti

Primary Details

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

Place in performance ranking	384	not rated
Place by popularity	not in top-100	not in top-100
Cost-Effectiveness Evaluation	2.61	no data
Architecture	Kepler (2012−2018)	GCN 1.0 (2012−2020)
GPU code name	GK104	Pitcairn
Market segment	Desktop	Desktop
Release date	16 August 2012 (11 years ago)	5 May 2015 (8 years ago)
Launch price (MSRP)	$299	no data
Current price	$189 (0.6x MSRP)	no data

Cost-Effectiveness Evaluation

Performance to price ratio. The higher, the better.

Detailed Specifications

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	1344	1024
CUDA cores	1344	no data
Core clock speed	915 MHz	958 MHz
Boost clock speed	980 MHz	no data
Number of transistors	3,540 million	2,800 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	150 Watt	80 Watt
Texture fill rate	102.5 billion/sec	61.31
Floating-point performance	2,459.5 gflops	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).

Bus support	PCI Express 3.0	no data
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	9.5" (24.1 cm)	no data
Height	4.376" (11.1 cm)	no data
Width	2-slot	MXM Module
Supplementary power connectors	Two 6-pin	None
SLI options	+	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	GDDR5
Maximum RAM amount	2 GB	2 GB
Memory bus width	192-bit GDDR5	256 Bit
Memory clock speed	6.0 GB/s	5.5 GB/s
Memory bandwidth	144.2 GB/s	174.7 GB/s
Shared memory	-	no data

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	One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort	No outputs
Multi monitor support	4 displays	no data
HDMI	+	no data
HDCP	+	no data
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	Internal	no data

Supported GPU Technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	+	no data
3D Gaming	+	no data
3D Vision	+	no data

API Compatibility

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

DirectX	12 (11_0)	12 (11_1)
Shader Model	5.1	5.1
OpenGL	4.3	4.6
OpenCL	1.2	1.2
Vulkan	1.1.126	1.2
CUDA	+	no data

Pros & Cons Summary

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Recency	16 August 2012	5 May 2015
Power consumption (TDP)	150 Watt	80 Watt

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