GeForce GTX 660M vs Radeon HD 6990M Crossfire

Place in performance ranking	425	670
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	8.69	0.71
Architecture	Terascale 2 (2009−2015)	Kepler (2012−2018)
GPU code name	Blackcomb XTX	N13E-GE
Market segment	Laptop	Laptop
Release date	12 July 2011 (12 years ago)	22 March 2012 (12 years ago)
Current price	$170	$276

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

HD 6990M Crossfire has 1124% better value for money than GTX 660M.

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	2240	384
CUDA cores	no data	384
Core clock speed	715 MHz	835 MHz
Boost clock speed	no data	950 MHz
Number of transistors	2x1700 Million	1,270 million
Manufacturing process technology	40 nm	28 nm
Power consumption (TDP)	no data	50 Watt
Texture fill rate	no data	30.4 billion/sec
Floating-point performance	no data	729.6 gflops

Form factor & compatibility

Information on Radeon HD 6990M Crossfire and GeForce GTX 660M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Laptop size	large	large
Bus support	no data	PCI Express 2.0, PCI Express 3.0
Interface	no data	MXM-B (3.0)
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	2x2 GB	2 GB
Memory bus width	256 Bit	128bit
Memory clock speed	900 MHz	2000 MHz
Memory bandwidth	no data	64.0 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 data	No outputs
HDMI	no data	+
HDCP	no data	+
Maximum VGA resolution	no data	Up to 2048x1536

Supported technologies

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

Optimus

no data

API compatibility

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

DirectX	11	12 API
Shader Model	no data	5.1
OpenGL	no data	4.5
OpenCL	no data	1.1
Vulkan	no data	1.1.126
CUDA	no data	+

Synthetic benchmark performance

Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

HD 6990M Crossfire 9.75
+162%

GTX 660M 3.72

Radeon HD 6990M Crossfire outperforms GeForce GTX 660M by 162% based on our aggregate benchmark results.

3DMark 11 Performance GPU

3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.

Benchmark coverage: 17%

HD 6990M Crossfire 6422
+171%

GTX 660M 2369

Radeon HD 6990M Crossfire outperforms GeForce GTX 660M by 171% in 3DMark 11 Performance GPU.

3DMark Vantage Performance

3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.

Benchmark coverage: 17%

HD 6990M Crossfire 25759
+135%

GTX 660M 10971

Radeon HD 6990M Crossfire outperforms GeForce GTX 660M by 135% in 3DMark Vantage Performance.

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:

900p	99 +230%	30 −230%
Full HD	108 +200%	36 −200%
1200p	95−100 +150%	38 −150%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

14−16

no data

Full HD
Medium Preset

Assassin's Creed Odyssey	20−22	no data
Assassin's Creed Valhalla	14−16	no data
Battlefield 5	30−33	no data
Call of Duty: Modern Warfare	20−22	no data
Cyberpunk 2077	14−16	no data
Far Cry 5	21−24	no data
Far Cry New Dawn	27−30	no data
Forza Horizon 4	45−50	no data
Hitman 3	18−20	no data
Horizon Zero Dawn	40−45	no data
Metro Exodus	30−33	no data
Red Dead Redemption 2	27−30	no data
Shadow of the Tomb Raider	30−33	no data
Watch Dogs: Legion	35−40	no data

Full HD
High Preset

Assassin's Creed Odyssey	20−22	no data
Assassin's Creed Valhalla	14−16	no data
Battlefield 5	30−33	no data
Call of Duty: Modern Warfare	20−22	no data
Cyberpunk 2077	14−16	no data
Far Cry 5	21−24	no data
Far Cry New Dawn	27−30	no data
Forza Horizon 4	45−50	no data
Hitman 3	18−20	no data
Horizon Zero Dawn	40−45	no data
Metro Exodus	30−33	no data
Red Dead Redemption 2	27−30	no data
Shadow of the Tomb Raider	30−33	no data
The Witcher 3: Wild Hunt	20−22	no data
Watch Dogs: Legion	35−40	no data

Full HD
Ultra Preset

Assassin's Creed Odyssey	20−22	no data
Assassin's Creed Valhalla	14−16	no data
Call of Duty: Modern Warfare	20−22	no data
Cyberpunk 2077	14−16	no data
Far Cry 5	21−24	no data
Forza Horizon 4	45−50	no data
Horizon Zero Dawn	40−45	no data
Shadow of the Tomb Raider	30−33	no data
The Witcher 3: Wild Hunt	20−22	no data
Watch Dogs: Legion	35−40	no data

Full HD
Epic Preset

Red Dead Redemption 2

27−30

no data

1440p
High Preset

Battlefield 5	18−20	no data
Far Cry New Dawn	16−18	no data

1440p
Ultra Preset

Assassin's Creed Odyssey	9−10	no data
Assassin's Creed Valhalla	5−6 +400%	1−2 −400%
Call of Duty: Modern Warfare	12−14	no data
Cyberpunk 2077	5−6	no data
Far Cry 5	14−16	no data
Forza Horizon 4	18−20	no data
Hitman 3	12−14	no data
Horizon Zero Dawn	20−22	no data
Metro Exodus	14−16 +180%	5−6 −180%
Shadow of the Tomb Raider	12−14 +200%	4−5 −200%
The Witcher 3: Wild Hunt	9−10	no data
Watch Dogs: Legion	5−6	no data

1440p
Epic Preset

Red Dead Redemption 2

16−18

no data

4K
High Preset

Battlefield 5	9−10	no data
Far Cry New Dawn	7−8	no data
Hitman 3	6−7 +200%	2−3 −200%
Horizon Zero Dawn	10−11	no data
Shadow of the Tomb Raider	5−6	no data
The Witcher 3: Wild Hunt	7−8 +250%	2−3 −250%

4K
Ultra Preset

Assassin's Creed Odyssey	6−7	no data
Assassin's Creed Valhalla	4−5	no data
Call of Duty: Modern Warfare	4−5	no data
Cyberpunk 2077	1−2	no data
Far Cry 5	5−6	no data
Forza Horizon 4	12−14	no data
Horizon Zero Dawn	10−11	no data
Metro Exodus	10−11	no data
Watch Dogs: Legion	3−4	no data