GeForce GT 640 vs GeForce GTX 660 Ti
Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640 and GeForce GTX 660 Ti. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640 and GeForce GTX 660 Ti. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
Main Specs
GeForce GT 640
GeForce GTX 660 Ti
Power consumption (TDP)
65 Watt
150 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
Two 6-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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GeForce GTX 660 Ti has 130% more power consumption, than GeForce GT 640.
Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
GeForce GT 640 and GeForce GTX 660 Ti have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce GT 640 and GeForce GTX 660 Ti are build with Kepler architecture.
Core clock speed of GeForce GTX 660 Ti is 13 MHz higher, than GeForce GT 640.
GeForce GT 640 and GeForce GTX 660 Ti are manufactured by 28 nm process technology.
GeForce GT 640 is 136 mm longer, than GeForce GTX 660 Ti.
Memory clock speed of GeForce GT 640 is 1776 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
2−3
21−24
ultra / 1080p
1−2
12−14
QHD / 1440p
0−1
8−9
4K / 2160p
−
5−6
low / 720p
14−16
40−45
medium / 1080p
5−6
27−30
The average gaming FPS of GeForce GTX 660 Ti in Assassin's Creed Odyssey is 333% more, than GeForce GT 640.
high / 1080p
7−8
35−40
ultra / 1080p
5−6
30−35
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
20−22
70−75
medium / 1080p
7−8
40−45
The average gaming FPS of GeForce GTX 660 Ti in Battlefield 5 is 360% more, than GeForce GT 640.
low / 768p
50−55
50−55
high / 1080p
35−40
−
QHD / 1440p
0−1
0−1
GeForce GT 640 and GeForce GTX 660 Ti have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
230−240
medium / 768p
90−95
210−220
ultra / 1080p
45−50
120−130
QHD / 1440p
24−27
100−110
4K / 2160p
18−20
55−60
high / 768p
65−70
170−180
The average gaming FPS of GeForce GTX 660 Ti in Counter-Strike: Global Offensive is 149% more, than GeForce GT 640.
low / 768p
70−75
60−65
ultra / 1080p
21−24
55−60
medium / 1080p
45−50
55−60
The average gaming FPS of GeForce GTX 660 Ti in Cyberpunk 2077 is 25% more, than GeForce GT 640.
low / 768p
70−75
120−130
medium / 768p
50−55
110−120
ultra / 1080p
27−30
85−90
The average gaming FPS of GeForce GTX 660 Ti in Dota 2 is 113% more, than GeForce GT 640.
high / 1080p
3−4
27−30
ultra / 1080p
3−4
24−27
QHD / 1440p
−
20−22
4K / 2160p
2−3
9−10
low / 720p
14−16
55−60
medium / 1080p
4−5
30−33
The average gaming FPS of GeForce GTX 660 Ti in Far Cry 5 is 500% more, than GeForce GT 640.
high / 1080p
10−12
35−40
ultra / 1080p
5−6
27−30
QHD / 1440p
2−3
16−18
low / 720p
50−55
130−140
medium / 1080p
16−18
75−80
The average gaming FPS of GeForce GTX 660 Ti in Fortnite is 247% more, than GeForce GT 640.
high / 1080p
6−7
35−40
ultra / 1080p
−
27−30
QHD / 1440p
4−5
16−18
4K / 2160p
2−3
14−16
low / 720p
21−24
75−80
medium / 1080p
9−10
40−45
The average gaming FPS of GeForce GTX 660 Ti in Forza Horizon 4 is 311% more, than GeForce GT 640.
low / 768p
45−50
110−120
medium / 768p
−
95−100
high / 1080p
7−8
45−50
ultra / 1080p
3−4
18−20
QHD / 1440p
0−1
9−10
medium / 720p
40−45
−
The average gaming FPS of GeForce GTX 660 Ti in Grand Theft Auto V is 215% more, than GeForce GT 640.
high / 1080p
2−3
14−16
ultra / 1080p
0−1
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
8−9
40−45
medium / 1080p
4−5
20−22
The average gaming FPS of GeForce GTX 660 Ti in Metro Exodus is 420% more, than GeForce GT 640.
low / 768p
80−85
120−130
ultra / 1080p
70−75
−
medium / 1080p
−
110−120
The average gaming FPS of GeForce GTX 660 Ti in Minecraft is 52% more, than GeForce GT 640.
ultra / 1080p
12−14
14−16
low / 720p
27−30
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 660 Ti in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce GT 640.
high / 1080p
6−7
16−18
ultra / 1080p
4−5
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
7−8
40−45
medium / 1080p
−
21−24
The average gaming FPS of GeForce GTX 660 Ti in Red Dead Redemption 2 is 283% more, than GeForce GT 640.
low / 768p
14−16
80−85
medium / 768p
10−11
50−55
high / 1080p
5−6
27−30
ultra / 1080p
4−5
16−18
4K / 2160p
0−1
9−10
The average gaming FPS of GeForce GTX 660 Ti in The Witcher 3: Wild Hunt is 462% more, than GeForce GT 640.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
16−18
40−45
high / 768p
30−35
55−60
The average gaming FPS of GeForce GTX 660 Ti in World of Tanks is 61% more, than GeForce GT 640.
Full Specs
GeForce GT 640
GeForce GTX 660 Ti
Architecture
Kepler
Kepler
Code name
GK107
GK104
Type
Desktop
Desktop
Release date
5 June 2012
16 August 2012
Pipelines
384
1344
Core clock speed
902 MHz
915 MHz
Boost Clock
980 MHz
Transistor count
1,270 million
3,540 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
102.5 billion/sec
Floating-point performance
692.7 gflops
2,459.5 gflops
Length
145 mm
9.5" (24.1 cm)
Memory bus width
128 Bit
192-bit GDDR5
Memory clock speed
1782 MHz
6.0 GB/s
Memory bandwidth
28.51 GB/s
144.2 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_0)
Shader Model
5.1
5.1
OpenGL
4.6
4.3
OpenCL
1.2
1.2
Vulkan
1.1.126
1.1.126
CUDA
3.0
+
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)
24 Mh/s
99 Mh/s
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