GeForce GTX 660 vs Radeon HD 6850 X2
If you are going to buy a new graphics card and are choosing between GeForce GTX 660 and Radeon HD 6850 X2, 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 HD 6850 X2, check out specs charts below.
Radeon HD 6850 X2
Main Specs
GeForce GTX 660
Radeon HD 6850 X2
Power consumption (TDP)
140 Watt
254 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
One 6-pin
2x 8-pin
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
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Radeon HD 6850 X2 has 81% more power consumption, than GeForce GTX 660.
GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon HD 6850 X2 uses PCIe 2.0 x16 interface.
GeForce GTX 660 and Radeon HD 6850 X2 have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce GTX 660 is build with Kepler architecture, and Radeon HD 6850 X2 - with TeraScale 2.
Core clock speed of GeForce GTX 660 is 180 MHz higher, than Radeon HD 6850 X2.
GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon HD 6850 X2 - by 40 nm process technology.
Memory clock speed of Radeon HD 6850 X2 is 4194 MHz higher, than GeForce GTX 660.
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
12−14
ultra / 1080p
12−14
7−8
QHD / 1440p
6−7
2−3
4K / 2160p
5−6
−
low / 720p
40−45
27−30
medium / 1080p
24−27
16−18
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 61% more, than Radeon HD 6850 X2.
high / 1080p
30−35
21−24
ultra / 1080p
27−30
18−20
QHD / 1440p
10−12
4−5
4K / 2160p
8−9
−
low / 720p
65−70
45−50
medium / 1080p
35−40
21−24
The average gaming FPS of GeForce GTX 660 in Battlefield 5 is 52% more, than Radeon HD 6850 X2.
low / 768p
50−55
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GTX 660 in Call of Duty: Warzone is 10% more, than Radeon HD 6850 X2.
low / 768p
230−240
190−200
medium / 768p
200−210
160−170
ultra / 1080p
120−130
85−90
QHD / 1440p
90−95
45−50
4K / 2160p
50−55
30−33
high / 768p
160−170
120−130
The average gaming FPS of GeForce GTX 660 in Counter-Strike: Global Offensive is 34% more, than Radeon HD 6850 X2.
low / 768p
60−65
55−60
ultra / 1080p
50−55
35−40
medium / 1080p
55−60
45−50
The average gaming FPS of GeForce GTX 660 in Cyberpunk 2077 is 21% more, than Radeon HD 6850 X2.
low / 768p
120−130
100−110
medium / 768p
100−110
85−90
ultra / 1080p
80−85
55−60
The average gaming FPS of GeForce GTX 660 in Dota 2 is 25% more, than Radeon HD 6850 X2.
high / 1080p
24−27
14−16
ultra / 1080p
21−24
14−16
QHD / 1440p
18−20
−
4K / 2160p
8−9
5−6
low / 720p
50−55
30−35
medium / 1080p
27−30
16−18
The average gaming FPS of GeForce GTX 660 in Far Cry 5 is 58% more, than Radeon HD 6850 X2.
high / 1080p
30−35
21−24
ultra / 1080p
24−27
16−18
QHD / 1440p
16−18
16−18
low / 720p
120−130
85−90
medium / 1080p
70−75
45−50
The average gaming FPS of GeForce GTX 660 in Fortnite is 42% more, than Radeon HD 6850 X2.
high / 1080p
30−35
21−24
ultra / 1080p
24−27
16−18
QHD / 1440p
14−16
7−8
4K / 2160p
12−14
−
low / 720p
65−70
45−50
medium / 1080p
35−40
24−27
The average gaming FPS of GeForce GTX 660 in Forza Horizon 4 is 45% more, than Radeon HD 6850 X2.
low / 768p
100−110
75−80
medium / 768p
90−95
65−70
high / 1080p
40−45
24−27
ultra / 1080p
16−18
10−11
QHD / 1440p
7−8
1−2
The average gaming FPS of GeForce GTX 660 in Grand Theft Auto V is 44% more, than Radeon HD 6850 X2.
high / 1080p
12−14
8−9
ultra / 1080p
10−11
6−7
QHD / 1440p
10−11
−
4K / 2160p
3−4
2−3
low / 720p
40−45
24−27
medium / 1080p
18−20
10−12
The average gaming FPS of GeForce GTX 660 in Metro Exodus is 70% more, than Radeon HD 6850 X2.
low / 768p
120−130
100−110
ultra / 1080p
−
95−100
medium / 1080p
110−120
100−110
The average gaming FPS of GeForce GTX 660 in Minecraft is 14% more, than Radeon HD 6850 X2.
high / 1080p
−
21−24
ultra / 1080p
14−16
16−18
low / 720p
70−75
50−55
medium / 1080p
18−20
21−24
The average gaming FPS of GeForce GTX 660 in PLAYERUNKNOWN'S BATTLEGROUNDS is 16% more, than Radeon HD 6850 X2.
high / 1080p
14−16
12−14
ultra / 1080p
10−11
9−10
QHD / 1440p
1−2
0−1
4K / 2160p
1−2
−
low / 720p
35−40
24−27
medium / 1080p
21−24
14−16
The average gaming FPS of GeForce GTX 660 in Red Dead Redemption 2 is 40% more, than Radeon HD 6850 X2.
low / 768p
70−75
45−50
medium / 768p
45−50
27−30
high / 1080p
24−27
16−18
ultra / 1080p
14−16
9−10
4K / 2160p
8−9
7−8
The average gaming FPS of GeForce GTX 660 in The Witcher 3: Wild Hunt is 50% more, than Radeon HD 6850 X2.
low / 768p
90−95
95−100
medium / 768p
60−65
55−60
ultra / 1080p
40−45
30−35
high / 768p
55−60
50−55
The average gaming FPS of GeForce GTX 660 in World of Tanks is 5% more, than Radeon HD 6850 X2.
Full Specs
GeForce GTX 660
Radeon HD 6850 X2
Architecture
Kepler
TeraScale 2
Code name
GK106
Barts
Type
Desktop
Desktop
Release date
6 September 2012
19 September 2011
Pipelines
960
960
Core clock speed
980 MHz
800 MHz
Boost Clock
1033 MHz
Transistor count
2,540 million
1,700 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
78.4 billion/sec
38.40
Floating-point performance
1,981 gflops
2x 1,536.0 gflops
Length
9.5" (24.1 cm)
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
4200 MHz
Memory bandwidth
144.2 GB/s
134.4 GB/s
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
960
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)
66 Mh/s
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