GeForce GTX 660 Ti vs Radeon HD 6990M
In this comparison between GeForce GTX 660 Ti and Radeon HD 6990M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GTX 660 Ti will be the best choice, for others Radeon HD 6990M will be their preference. Study the comparison tables below and make your choice.
Radeon HD 6990M is a Laptop Graphics Card
Note: Radeon HD 6990M is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Radeon HD 6990M here:
Main Specs
GeForce GTX 660 Ti
Radeon HD 6990M
Power consumption (TDP)
150 Watt
100 Watt
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
Two 6-pin
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
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GeForce GTX 660 Ti has 50% more power consumption, than Radeon HD 6990M.
GeForce GTX 660 Ti is connected by PCIe 3.0 x16, and Radeon HD 6990M uses MXM-B (3.0) interface.
GeForce GTX 660 Ti and Radeon HD 6990M have maximum RAM of 2 GB.
GeForce GTX 660 Ti is used in Desktops, and Radeon HD 6990M - in Laptops.
GeForce GTX 660 Ti is build with Kepler architecture, and Radeon HD 6990M - with Terascale 2.
Core clock speed of GeForce GTX 660 Ti is 200 MHz higher, than Radeon HD 6990M.
GeForce GTX 660 Ti is manufactured by 28 nm process technology, and Radeon HD 6990M - by 40 nm process technology.
Memory clock speed of Radeon HD 6990M is 894 MHz higher, than GeForce GTX 660 Ti.
Game benchmarks
Assassin's Creed Odyssey
Battlefield 5
Call of Duty: Warzone
Counter-Strike: Global Offensive
Cyberpunk 2077
Dota 2
Far Cry 5
Fortnite
Forza Horizon 4
Grand Theft Auto V
Metro Exodus
Minecraft
PLAYERUNKNOWN'S BATTLEGROUNDS
Red Dead Redemption 2
The Witcher 3: Wild Hunt
World of Tanks
high / 1080p
21−24
14−16
ultra / 1080p
12−14
8−9
QHD / 1440p
8−9
3−4
4K / 2160p
5−6
−
low / 720p
40−45
30−33
medium / 1080p
27−30
16−18
The average gaming FPS of GeForce GTX 660 Ti in Assassin's Creed Odyssey is 53% more, than Radeon HD 6990M.
high / 1080p
35−40
21−24
ultra / 1080p
30−35
18−20
QHD / 1440p
14−16
6−7
4K / 2160p
9−10
5−6
low / 720p
70−75
45−50
medium / 1080p
40−45
24−27
The average gaming FPS of GeForce GTX 660 Ti in Battlefield 5 is 61% more, than Radeon HD 6990M.
low / 768p
50−55
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GTX 660 Ti in Call of Duty: Warzone is 10% more, than Radeon HD 6990M.
low / 768p
230−240
200−210
medium / 768p
210−220
170−180
ultra / 1080p
120−130
90−95
QHD / 1440p
100−110
50−55
4K / 2160p
55−60
30−33
high / 768p
170−180
130−140
The average gaming FPS of GeForce GTX 660 Ti in Counter-Strike: Global Offensive is 32% more, than Radeon HD 6990M.
low / 768p
60−65
55−60
ultra / 1080p
55−60
35−40
medium / 1080p
55−60
45−50
The average gaming FPS of GeForce GTX 660 Ti in Cyberpunk 2077 is 25% more, than Radeon HD 6990M.
low / 768p
120−130
100−110
medium / 768p
110−120
90−95
ultra / 1080p
85−90
60−65
The average gaming FPS of GeForce GTX 660 Ti in Dota 2 is 26% more, than Radeon HD 6990M.
high / 1080p
27−30
16−18
ultra / 1080p
24−27
14−16
QHD / 1440p
20−22
−
4K / 2160p
9−10
6−7
low / 720p
55−60
35−40
medium / 1080p
30−33
18−20
The average gaming FPS of GeForce GTX 660 Ti in Far Cry 5 is 57% more, than Radeon HD 6990M.
high / 1080p
35−40
24−27
ultra / 1080p
27−30
18−20
QHD / 1440p
16−18
16−18
low / 720p
130−140
95−100
medium / 1080p
75−80
50−55
The average gaming FPS of GeForce GTX 660 Ti in Fortnite is 40% more, than Radeon HD 6990M.
high / 1080p
35−40
24−27
ultra / 1080p
27−30
18−20
QHD / 1440p
16−18
8−9
4K / 2160p
14−16
−
low / 720p
75−80
50−55
medium / 1080p
40−45
27−30
The average gaming FPS of GeForce GTX 660 Ti in Forza Horizon 4 is 53% more, than Radeon HD 6990M.
low / 768p
110−120
80−85
medium / 768p
95−100
70−75
high / 1080p
45−50
27−30
ultra / 1080p
18−20
10−12
QHD / 1440p
9−10
2−3
The average gaming FPS of GeForce GTX 660 Ti in Grand Theft Auto V is 46% more, than Radeon HD 6990M.
high / 1080p
14−16
9−10
ultra / 1080p
10−12
7−8
QHD / 1440p
10−12
−
4K / 2160p
3−4
2−3
low / 720p
40−45
27−30
medium / 1080p
20−22
12−14
The average gaming FPS of GeForce GTX 660 Ti in Metro Exodus is 50% more, than Radeon HD 6990M.
low / 768p
120−130
110−120
ultra / 1080p
−
100−110
medium / 1080p
110−120
100−110
The average gaming FPS of GeForce GTX 660 Ti in Minecraft is 9% more, than Radeon HD 6990M.
high / 1080p
−
21−24
ultra / 1080p
14−16
16−18
low / 720p
75−80
55−60
medium / 1080p
18−20
24−27
The average gaming FPS of GeForce GTX 660 Ti in PLAYERUNKNOWN'S BATTLEGROUNDS is 12% more, than Radeon HD 6990M.
high / 1080p
16−18
14−16
ultra / 1080p
10−12
9−10
QHD / 1440p
3−4
0−1
4K / 2160p
2−3
−
low / 720p
40−45
27−30
medium / 1080p
21−24
16−18
The average gaming FPS of GeForce GTX 660 Ti in Red Dead Redemption 2 is 35% more, than Radeon HD 6990M.
low / 768p
80−85
50−55
medium / 768p
50−55
30−35
high / 1080p
27−30
18−20
ultra / 1080p
16−18
10−11
4K / 2160p
9−10
8−9
The average gaming FPS of GeForce GTX 660 Ti in The Witcher 3: Wild Hunt is 58% more, than Radeon HD 6990M.
low / 768p
90−95
100−105
medium / 768p
60−65
60−65
ultra / 1080p
40−45
30−35
high / 768p
55−60
50−55
The average gaming FPS of GeForce GTX 660 Ti in World of Tanks is 1% more, than Radeon HD 6990M.
Full Specs
GeForce GTX 660 Ti
Radeon HD 6990M
Architecture
Kepler
Terascale 2
Code name
GK104
Blackcomb XTX
Type
Desktop
Laptop
Release date
16 August 2012
12 July 2011
Pipelines
1344
1120
Core clock speed
915 MHz
715 MHz
Boost Clock
980 MHz
Transistor count
3,540 million
1,700 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
102.5 billion/sec
40.04
Floating-point performance
2,459.5 gflops
1,601.6 gflops
Length
9.5" (24.1 cm)
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
900 MHz
Memory bandwidth
144.2 GB/s
115.2 GB/s
Shared memory
-
-
DirectX
12 (11_0)
11.2 (11_0)
Shader Model
5.1
5.0
OpenGL
4.3
4.4
OpenCL
1.2
1.2
Vulkan
1.1.126
N/A
CUDA
+
CUDA cores
1344
Bus support
PCI Express 3.0
Height
4.376" (11.1 cm)
SLI options
+
Multi monitor support
4 displays
HDMI
+
HDCP
+
Maximum VGA resolution
2048x1536
Audio input for HDMI
Internal
3D Blu-Ray
+
3D Gaming
+
3D Vision
+
Bitcoin / BTC (SHA256)
99 Mh/s
Laptop size
large
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