ATI Radeon DDR MAXX vs GeForce GTX 660M Mac Edition

Primary details

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

Place in the ranking	1033	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	2.26	no data
Architecture	Kepler (2012−2018)	Rage 6 (2000−2007)
GPU code name	GK107	Rage 6
Market segment	Laptop	Desktop
Release date	1 April 2013 (13 years ago)	1 June 2000 (25 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	384	no data
Core clock speed	950 MHz	148 MHz
Number of transistors	1,270 million	30 million
Manufacturing process technology	28 nm	180 nm
Power consumption (TDP)	50 Watt	no data
Texture fill rate	30.40	0.89 ×2
Floating-point processing power	0.7296 TFLOPS	no data
ROPs	16	2 ×2
TMUs	32	6 ×2
L1 Cache	32 KB	no data
L2 Cache	256 KB	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).

Interface	MXM-B (3.0)	AGP 2x
Width	no data	1-slot
Supplementary power connectors	None	1x Molex

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	DDR
Maximum RAM amount	512 MB	32 MB ×2
Memory bus width	128 Bit	128 Bit ×2
Memory clock speed	1250 MHz	148 MHz
Memory bandwidth	80 GB/s	4.736 GB/s ×2

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

No outputs

2x VGA

API and SDK support

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

DirectX	12 (11_0)	7.0
Shader Model	5.1	no data
OpenGL	4.6	1.3
OpenCL	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	3.0	-

Pros & cons summary

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Recency	1 April 2013	1 June 2000
Maximum RAM amount	512 MB	32 MB
Chip lithography	28 nm	180 nm