GeForce GTX 660M Mac Edition vs Radeon R6 M255DX

Place in the ranking	962	964
Place by popularity	not in top-100	not in top-100
Power efficiency	no data	2.16
Architecture	GCN 1.0 (2011−2020)	Kepler (2012−2018)
GPU code name	Jet	GK107
Market segment	Laptop	Laptop
Release date	7 January 2014 (10 years ago)	1 April 2013 (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	320	384
Core clock speed	780 MHz	950 MHz
Boost clock speed	855 MHz	no data
Number of transistors	690 million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	no data	50 Watt
Texture fill rate	17.10	30.40
Floating-point processing power	0.5472 TFLOPS	0.7296 TFLOPS
ROPs	8	16
TMUs	20	32

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).

Laptop size	medium sized	no data
Interface	IGP	MXM-B (3.0)
Supplementary power connectors	no data	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	System Shared	GDDR5
Maximum RAM amount	System Shared	512 MB
Memory bus width	System Shared	128 Bit
Memory clock speed	System Shared	1250 MHz
Memory bandwidth	no data	80 GB/s
Shared memory	+	-

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	No outputs	No outputs
Eyefinity	+	-

Supported technologies

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

AppAcceleration

API compatibility

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

DirectX	12 (11_1)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.6	4.6
OpenCL	1.2	1.2
Vulkan	1.2.131	1.1.126
CUDA	-	3.0

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

10
+11.1%

9−10

−11.1%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

4−5
+33.3%

3−4

−33.3%

Full HD
Medium Preset

Assassin's Creed Odyssey	6−7 +20%	5−6 −20%
Call of Duty: Modern Warfare	5−6 +25%	4−5 −25%
Cyberpunk 2077	4−5 +33.3%	3−4 −33.3%
Far Cry 5	2−3 +100%	1−2 −100%
Far Cry New Dawn	4−5 +33.3%	3−4 −33.3%
Forza Horizon 4	4−5 +33.3%	3−4 −33.3%
Hitman 3	6−7 +20%	5−6 −20%
Horizon Zero Dawn	16−18 +14.3%	14−16 −14.3%
Red Dead Redemption 2	3−4 +50%	2−3 −50%
Shadow of the Tomb Raider	9−10 +12.5%	8−9 −12.5%
Watch Dogs: Legion	30−35 +13.3%	30−33 −13.3%

Full HD
High Preset

Assassin's Creed Odyssey	6−7 +20%	5−6 −20%
Call of Duty: Modern Warfare	5−6 +25%	4−5 −25%
Cyberpunk 2077	4−5 +33.3%	3−4 −33.3%
Far Cry 5	2−3 +100%	1−2 −100%
Far Cry New Dawn	4−5 +33.3%	3−4 −33.3%
Forza Horizon 4	4−5 +33.3%	3−4 −33.3%
Hitman 3	6−7 +20%	5−6 −20%
Horizon Zero Dawn	16−18 +14.3%	14−16 −14.3%
Red Dead Redemption 2	3−4 +50%	2−3 −50%
Shadow of the Tomb Raider	9−10 +12.5%	8−9 −12.5%
The Witcher 3: Wild Hunt	12−14 +20%	10−11 −20%
Watch Dogs: Legion	30−35 +13.3%	30−33 −13.3%

Full HD
Ultra Preset

Assassin's Creed Odyssey	6−7 +20%	5−6 −20%
Call of Duty: Modern Warfare	5−6 +25%	4−5 −25%
Cyberpunk 2077	4−5 +33.3%	3−4 −33.3%
Far Cry 5	2−3 +100%	1−2 −100%
Forza Horizon 4	4−5 +33.3%	3−4 −33.3%
Hitman 3	6−7 +20%	5−6 −20%
Horizon Zero Dawn	16−18 +14.3%	14−16 −14.3%
Shadow of the Tomb Raider	9−10 +12.5%	8−9 −12.5%
The Witcher 3: Wild Hunt	12−14 +20%	10−11 −20%
Watch Dogs: Legion	30−35 +13.3%	30−33 −13.3%

Full HD
Epic Preset

Red Dead Redemption 2

3−4
+50%

2−3

−50%

1440p
High Preset

Battlefield 5	2−3 +100%	1−2 −100%
Far Cry New Dawn	2−3 +100%	1−2 −100%

1440p
Ultra Preset

Assassin's Creed Odyssey	1−2	0−1
Call of Duty: Modern Warfare	0−1	0−1
Cyberpunk 2077	1−2	0−1
Far Cry 5	2−3 +100%	1−2 −100%
Hitman 3	7−8 +16.7%	6−7 −16.7%
Horizon Zero Dawn	5−6 +25%	4−5 −25%
The Witcher 3: Wild Hunt	1−2	0−1
Watch Dogs: Legion	8−9 +14.3%	7−8 −14.3%