GeForce GTX 660 vs Radeon R9 M390X
If you are going to buy a new graphics card and are choosing between GeForce GTX 660 and Radeon R9 M390X, 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 stacks up against Radeon R9 M390X, check out specs charts below.
Radeon R9 M390X is a Laptop Graphics Card
Note: Radeon R9 M390X 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 R9 M390X here:
Main Specs
GeForce GTX 660
Radeon R9 M390X
Power consumption (TDP)
140 Watt
100 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
One 6-pin
None
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
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GeForce GTX 660 has 40% more power consumption, than Radeon R9 M390X.
Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
Radeon R9 M390X has 2 GB more memory, than GeForce GTX 660.
GeForce GTX 660 is used in Desktops, and Radeon R9 M390X - in Laptops.
GeForce GTX 660 is build with Kepler architecture, and Radeon R9 M390X - with GCN 3.
Core clock speed of GeForce GTX 660 is 257 MHz higher, than Radeon R9 M390X.
GeForce GTX 660 and Radeon R9 M390X are manufactured by 28 nm process technology.
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
20−22
21−24
ultra / 1080p
12−14
12−14
QHD / 1440p
6−7
8−9
4K / 2160p
5−6
5−6
low / 720p
40−45
40−45
medium / 1080p
24−27
27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 5% more, than GeForce GTX 660.
high / 1080p
30−35
35−40
ultra / 1080p
27−30
30−35
QHD / 1440p
10−12
14−16
4K / 2160p
8−9
9−10
low / 720p
65−70
70−75
medium / 1080p
35−40
40−45
The average gaming FPS of Radeon R9 M390X in Battlefield 5 is 13% more, than GeForce GTX 660.
low / 768p
50−55
50−55
QHD / 1440p
0−1
0−1
GeForce GTX 660 and Radeon R9 M390X have the same average FPS in Call of Duty: Warzone.
low / 768p
230−240
230−240
medium / 768p
200−210
210−220
ultra / 1080p
120−130
120−130
QHD / 1440p
90−95
100−110
4K / 2160p
50−55
55−60
high / 768p
160−170
170−180
The average gaming FPS of Radeon R9 M390X in Counter-Strike: Global Offensive is 4% more, than GeForce GTX 660.
low / 768p
60−65
60−65
ultra / 1080p
50−55
55−60
medium / 1080p
55−60
55−60
The average gaming FPS of Radeon R9 M390X in Cyberpunk 2077 is 3% more, than GeForce GTX 660.
low / 768p
120−130
120−130
medium / 768p
100−110
110−120
ultra / 1080p
80−85
85−90
The average gaming FPS of Radeon R9 M390X in Dota 2 is 4% more, than GeForce GTX 660.
high / 1080p
24−27
27−30
ultra / 1080p
21−24
24−27
QHD / 1440p
18−20
20−22
4K / 2160p
8−9
9−10
low / 720p
50−55
55−60
medium / 1080p
27−30
30−33
The average gaming FPS of Radeon R9 M390X in Far Cry 5 is 7% more, than GeForce GTX 660.
high / 1080p
30−35
35−40
ultra / 1080p
24−27
27−30
QHD / 1440p
16−18
16−18
low / 720p
120−130
130−140
medium / 1080p
70−75
75−80
The average gaming FPS of Radeon R9 M390X in Fortnite is 9% more, than GeForce GTX 660.
high / 1080p
30−35
35−40
ultra / 1080p
24−27
27−30
QHD / 1440p
14−16
16−18
4K / 2160p
12−14
14−16
low / 720p
65−70
75−80
medium / 1080p
35−40
40−45
The average gaming FPS of Radeon R9 M390X in Forza Horizon 4 is 16% more, than GeForce GTX 660.
low / 768p
100−110
110−120
medium / 768p
90−95
95−100
high / 1080p
40−45
45−50
ultra / 1080p
16−18
18−20
QHD / 1440p
7−8
9−10
The average gaming FPS of Radeon R9 M390X in Grand Theft Auto V is 9% more, than GeForce GTX 660.
high / 1080p
12−14
14−16
ultra / 1080p
10−11
10−12
QHD / 1440p
10−11
10−12
4K / 2160p
3−4
3−4
low / 720p
40−45
40−45
medium / 1080p
18−20
20−22
The average gaming FPS of Radeon R9 M390X in Metro Exodus is 6% more, than GeForce GTX 660.
low / 768p
120−130
120−130
medium / 1080p
110−120
110−120
GeForce GTX 660 and Radeon R9 M390X have the same average FPS in Minecraft.
ultra / 1080p
14−16
14−16
low / 720p
70−75
75−80
medium / 1080p
18−20
18−20
The average gaming FPS of Radeon R9 M390X in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GTX 660.
high / 1080p
14−16
16−18
ultra / 1080p
10−11
10−12
QHD / 1440p
1−2
3−4
4K / 2160p
1−2
2−3
low / 720p
35−40
40−45
medium / 1080p
21−24
21−24
The average gaming FPS of Radeon R9 M390X in Red Dead Redemption 2 is 14% more, than GeForce GTX 660.
low / 768p
70−75
80−85
medium / 768p
45−50
50−55
high / 1080p
24−27
27−30
ultra / 1080p
14−16
16−18
4K / 2160p
8−9
9−10
The average gaming FPS of Radeon R9 M390X in The Witcher 3: Wild Hunt is 15% more, than GeForce GTX 660.
low / 768p
90−95
90−95
medium / 768p
60−65
60−65
ultra / 1080p
40−45
40−45
high / 768p
55−60
55−60
GeForce GTX 660 and Radeon R9 M390X have the same average FPS in World of Tanks.
Full Specs
GeForce GTX 660
Radeon R9 M390X
Architecture
Kepler
GCN 3
Code name
GK106
Amethyst (XT) / Tonga
Type
Desktop
Laptop
Release date
6 September 2012
9 June 2015
Pipelines
960
2048
Core clock speed
980 MHz
723 MHz
Boost Clock
1033 MHz
Transistor count
2,540 million
5,000 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
78.4 billion/sec
92.54
Floating-point performance
1,981 gflops
2,961 gflops
Length
9.5" (24.1 cm)
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
Memory bandwidth
144.2 GB/s
160.0 GB/s
Shared memory
-
DirectX
12 (11_0)
Shader Model
5.1
6.3
OpenGL
4.3
4.4
OpenCL
1.2
Not Listed
Vulkan
1.1.126
+
CUDA
+
FreeSync
+
CUDA cores
960
Bus support
PCI Express 3.0
PCIe 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)
66 Mh/s
Laptop size
large
Eyefinity
+
HD3D
+
PowerTune
+
DualGraphics
+
ZeroCore
+
Switchable graphics
+
Mantle
+
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