GeForce GT 640 vs Radeon HD 6850 X2
If you are going to buy a new graphics card and are choosing between GeForce GT 640 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 GT 640 stacks up against Radeon HD 6850 X2, check out specs charts below.
Radeon HD 6850 X2
Main Specs
GeForce GT 640
Radeon HD 6850 X2
Power consumption (TDP)
65 Watt
254 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
2x 8-pin
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
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Radeon HD 6850 X2 has 290% more power consumption, than GeForce GT 640.
GeForce GT 640 is connected by PCIe 3.0 x16, and Radeon HD 6850 X2 uses PCIe 2.0 x16 interface.
GeForce GT 640 and Radeon HD 6850 X2 have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 6850 X2 - with TeraScale 2.
Core clock speed of GeForce GT 640 is 102 MHz higher, than Radeon HD 6850 X2.
GeForce GT 640 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 2418 MHz higher, than GeForce GT 640.
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
2−3
12−14
ultra / 1080p
1−2
7−8
QHD / 1440p
0−1
2−3
low / 720p
14−16
27−30
medium / 1080p
5−6
16−18
The average gaming FPS of Radeon HD 6850 X2 in Assassin's Creed Odyssey is 166% more, than GeForce GT 640.
high / 1080p
7−8
21−24
ultra / 1080p
5−6
18−20
QHD / 1440p
0−1
4−5
low / 720p
20−22
45−50
medium / 1080p
7−8
21−24
The average gaming FPS of Radeon HD 6850 X2 in Battlefield 5 is 170% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
35−40
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640 in Call of Duty: Warzone is 10% more, than Radeon HD 6850 X2.
low / 768p
110−120
190−200
medium / 768p
90−95
160−170
ultra / 1080p
45−50
85−90
QHD / 1440p
24−27
45−50
4K / 2160p
18−20
30−33
high / 768p
65−70
120−130
The average gaming FPS of Radeon HD 6850 X2 in Counter-Strike: Global Offensive is 77% more, than GeForce GT 640.
low / 768p
70−75
55−60
ultra / 1080p
21−24
35−40
medium / 1080p
45−50
45−50
GeForce GT 640 and Radeon HD 6850 X2 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
100−110
medium / 768p
50−55
85−90
ultra / 1080p
27−30
55−60
The average gaming FPS of Radeon HD 6850 X2 in Dota 2 is 62% more, than GeForce GT 640.
high / 1080p
3−4
14−16
ultra / 1080p
3−4
14−16
4K / 2160p
2−3
5−6
low / 720p
14−16
30−35
medium / 1080p
4−5
16−18
The average gaming FPS of Radeon HD 6850 X2 in Far Cry 5 is 240% more, than GeForce GT 640.
high / 1080p
10−12
21−24
ultra / 1080p
5−6
16−18
QHD / 1440p
2−3
16−18
low / 720p
50−55
85−90
medium / 1080p
16−18
45−50
The average gaming FPS of Radeon HD 6850 X2 in Fortnite is 123% more, than GeForce GT 640.
high / 1080p
6−7
21−24
ultra / 1080p
−
16−18
QHD / 1440p
4−5
7−8
4K / 2160p
2−3
−
low / 720p
21−24
45−50
medium / 1080p
9−10
24−27
The average gaming FPS of Radeon HD 6850 X2 in Forza Horizon 4 is 150% more, than GeForce GT 640.
low / 768p
45−50
75−80
medium / 768p
−
65−70
high / 1080p
7−8
24−27
ultra / 1080p
3−4
10−11
QHD / 1440p
0−1
1−2
medium / 720p
40−45
−
The average gaming FPS of Radeon HD 6850 X2 in Grand Theft Auto V is 94% more, than GeForce GT 640.
high / 1080p
2−3
8−9
ultra / 1080p
0−1
6−7
4K / 2160p
0−1
2−3
low / 720p
8−9
24−27
medium / 1080p
4−5
10−12
The average gaming FPS of Radeon HD 6850 X2 in Metro Exodus is 200% more, than GeForce GT 640.
low / 768p
80−85
100−110
ultra / 1080p
70−75
95−100
medium / 1080p
−
100−110
The average gaming FPS of Radeon HD 6850 X2 in Minecraft is 31% more, than GeForce GT 640.
high / 1080p
−
21−24
ultra / 1080p
12−14
16−18
low / 720p
27−30
50−55
medium / 1080p
14−16
21−24
The average gaming FPS of Radeon HD 6850 X2 in PLAYERUNKNOWN'S BATTLEGROUNDS is 66% more, than GeForce GT 640.
high / 1080p
6−7
12−14
ultra / 1080p
4−5
9−10
QHD / 1440p
0−1
0−1
low / 720p
7−8
24−27
medium / 1080p
−
14−16
The average gaming FPS of Radeon HD 6850 X2 in Red Dead Redemption 2 is 166% more, than GeForce GT 640.
low / 768p
14−16
45−50
medium / 768p
10−11
27−30
high / 1080p
5−6
16−18
ultra / 1080p
4−5
9−10
4K / 2160p
0−1
7−8
The average gaming FPS of Radeon HD 6850 X2 in The Witcher 3: Wild Hunt is 212% more, than GeForce GT 640.
low / 768p
70−75
95−100
medium / 768p
35−40
55−60
ultra / 1080p
16−18
30−35
high / 768p
30−35
50−55
The average gaming FPS of Radeon HD 6850 X2 in World of Tanks is 53% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 6850 X2
Architecture
Kepler
TeraScale 2
Code name
GK107
Barts
Type
Desktop
Desktop
Release date
5 June 2012
19 September 2011
Pipelines
384
960
Core clock speed
902 MHz
800 MHz
Transistor count
1,270 million
1,700 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
28.86
38.40
Floating-point performance
692.7 gflops
2x 1,536.0 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
4200 MHz
Memory bandwidth
28.51 GB/s
134.4 GB/s
DirectX
12 (11_0)
11.2 (11_0)
Shader Model
5.1
5.0
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.1.126
N/A
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
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