GeForce GTX 660 Ti vs Radeon HD 7990
If you are going to buy a new graphics card and are choosing between GeForce GTX 660 Ti and Radeon HD 7990, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GTX 660 Ti stacks up against Radeon HD 7990, check out specs charts below.
Main Specs
GeForce GTX 660 Ti
Radeon HD 7990
Power consumption (TDP)
150 Watt
375 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
Two 6-pin
2x 8-pin
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
3 GB
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 4x mini-DisplayPort
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Radeon HD 7990 has 150% more power consumption, than GeForce GTX 660 Ti.
Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
Radeon HD 7990 has 1 GB more memory, than GeForce GTX 660 Ti.
Both cards are used in Desktops.
GeForce GTX 660 Ti is build with Kepler architecture, and Radeon HD 7990 - with GCN 1.0.
Core clock speed of Radeon HD 7990 is 35 MHz higher, than GeForce GTX 660 Ti.
GeForce GTX 660 Ti and Radeon HD 7990 are manufactured by 28 nm process technology.
Radeon HD 7990 is 298 mm longer, than GeForce GTX 660 Ti.
Memory clock speed of Radeon HD 7990 is 5994 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
35−40
ultra / 1080p
12−14
21−24
QHD / 1440p
8−9
16−18
4K / 2160p
5−6
10−11
low / 720p
40−45
60−65
medium / 1080p
27−30
40−45
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 60% more, than GeForce GTX 660 Ti.
high / 1080p
35−40
55−60
ultra / 1080p
30−35
45−50
QHD / 1440p
14−16
35−40
4K / 2160p
9−10
18−20
low / 720p
70−75
100−110
medium / 1080p
40−45
60−65
The average gaming FPS of Radeon HD 7990 in Battlefield 5 is 58% more, than GeForce GTX 660 Ti.
low / 768p
50−55
50−55
QHD / 1440p
0−1
0−1
GeForce GTX 660 Ti and Radeon HD 7990 have the same average FPS in Call of Duty: Warzone.
low / 768p
230−240
250−260
medium / 768p
210−220
220−230
ultra / 1080p
120−130
180−190
QHD / 1440p
100−110
110−120
4K / 2160p
55−60
70−75
high / 768p
170−180
210−220
The average gaming FPS of Radeon HD 7990 in Counter-Strike: Global Offensive is 16% more, than GeForce GTX 660 Ti.
low / 768p
60−65
60−65
ultra / 1080p
55−60
−
medium / 1080p
55−60
55−60
GeForce GTX 660 Ti and Radeon HD 7990 have the same average FPS in Cyberpunk 2077.
low / 768p
120−130
120−130
medium / 768p
110−120
110−120
ultra / 1080p
85−90
100−110
The average gaming FPS of Radeon HD 7990 in Dota 2 is 5% more, than GeForce GTX 660 Ti.
high / 1080p
27−30
45−50
ultra / 1080p
24−27
40−45
QHD / 1440p
20−22
27−30
4K / 2160p
9−10
14−16
low / 720p
55−60
80−85
medium / 1080p
30−33
45−50
The average gaming FPS of Radeon HD 7990 in Far Cry 5 is 53% more, than GeForce GTX 660 Ti.
high / 1080p
35−40
60−65
ultra / 1080p
27−30
45−50
QHD / 1440p
16−18
27−30
4K / 2160p
−
27−30
low / 720p
130−140
180−190
medium / 1080p
75−80
110−120
The average gaming FPS of Radeon HD 7990 in Fortnite is 47% more, than GeForce GTX 660 Ti.
high / 1080p
35−40
60−65
ultra / 1080p
27−30
45−50
QHD / 1440p
16−18
30−35
4K / 2160p
14−16
24−27
low / 720p
75−80
100−110
medium / 1080p
40−45
65−70
The average gaming FPS of Radeon HD 7990 in Forza Horizon 4 is 55% more, than GeForce GTX 660 Ti.
low / 768p
110−120
140−150
medium / 768p
95−100
120−130
high / 1080p
45−50
70−75
ultra / 1080p
18−20
30−35
QHD / 1440p
9−10
21−24
The average gaming FPS of Radeon HD 7990 in Grand Theft Auto V is 38% more, than GeForce GTX 660 Ti.
high / 1080p
14−16
24−27
ultra / 1080p
10−12
20−22
QHD / 1440p
10−12
16−18
4K / 2160p
3−4
8−9
low / 720p
40−45
65−70
medium / 1080p
20−22
30−35
The average gaming FPS of Radeon HD 7990 in Metro Exodus is 64% more, than GeForce GTX 660 Ti.
low / 768p
120−130
130−140
medium / 1080p
110−120
120−130
The average gaming FPS of Radeon HD 7990 in Minecraft is 8% more, than GeForce GTX 660 Ti.
ultra / 1080p
14−16
14−16
low / 720p
75−80
100−110
medium / 1080p
18−20
18−20
The average gaming FPS of Radeon HD 7990 in PLAYERUNKNOWN'S BATTLEGROUNDS is 24% more, than GeForce GTX 660 Ti.
high / 1080p
16−18
24−27
ultra / 1080p
10−12
16−18
QHD / 1440p
3−4
10−11
4K / 2160p
2−3
7−8
low / 720p
40−45
65−70
medium / 1080p
21−24
35−40
The average gaming FPS of Radeon HD 7990 in Red Dead Redemption 2 is 68% more, than GeForce GTX 660 Ti.
low / 768p
80−85
130−140
medium / 768p
50−55
85−90
high / 1080p
27−30
45−50
ultra / 1080p
16−18
24−27
4K / 2160p
9−10
16−18
The average gaming FPS of Radeon HD 7990 in The Witcher 3: Wild Hunt is 63% more, than GeForce GTX 660 Ti.
low / 768p
90−95
90−95
medium / 768p
60−65
60−65
ultra / 1080p
40−45
50−55
high / 768p
55−60
60−65
The average gaming FPS of Radeon HD 7990 in World of Tanks is 6% more, than GeForce GTX 660 Ti.
Full Specs
GeForce GTX 660 Ti
Radeon HD 7990
Architecture
Kepler
GCN 1.0
Code name
GK104
Malta
Type
Desktop
Desktop
Release date
16 August 2012
24 April 2013
Pipelines
1344
2048
Core clock speed
915 MHz
950 MHz
Boost Clock
980 MHz
1000 MHz
Transistor count
3,540 million
4,313 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
102.5 billion/sec
128.0
Floating-point performance
2,459.5 gflops
2x 4,096 gflops
Length
9.5" (24.1 cm)
307 mm
Memory bus width
192-bit GDDR5
384 Bit
Memory clock speed
6.0 GB/s
6000 MHz
Memory bandwidth
144.2 GB/s
288.0 GB/s
Shared memory
-
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
1.2.131
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
459 Mh/s
Ethereum / ETH (DaggerHashimoto)
44 Mh/s
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