GeForce GT 645M vs GeForce GTX 660 Ti
When choosing between GeForce GT 645M and GeForce GTX 660 Ti, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 645M and GeForce GTX 660 Ti.
GeForce GT 645M is a Laptop Graphics Card
Note: GeForce GT 645M 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 GeForce GT 645M here:
Main Specs
GeForce GT 645M
GeForce GTX 660 Ti
Power consumption (TDP)
32 Watt
150 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
Two 6-pin
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 1x DisplayPort
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GeForce GTX 660 Ti has 368% more power consumption, than GeForce GT 645M.
Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
GeForce GT 645M and GeForce GTX 660 Ti have maximum RAM of 2 GB.
GeForce GT 645M is used in Laptops, and GeForce GTX 660 Ti - in Desktops.
GeForce GT 645M and GeForce GTX 660 Ti are build with Kepler architecture.
GeForce GT 645M and GeForce GTX 660 Ti are manufactured by 28 nm process technology.
Memory clock speed of GeForce GT 645M is 1794 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
1−2
21−24
ultra / 1080p
0−1
12−14
QHD / 1440p
0−1
8−9
4K / 2160p
−
5−6
low / 720p
12−14
40−45
medium / 1080p
2−3
27−30
The average gaming FPS of GeForce GTX 660 Ti in Assassin's Creed Odyssey is 520% more, than GeForce GT 645M.
high / 1080p
−
35−40
ultra / 1080p
3−4
30−35
QHD / 1440p
0−1
14−16
4K / 2160p
−
9−10
low / 720p
12−14
70−75
medium / 1080p
4−5
40−45
The average gaming FPS of GeForce GTX 660 Ti in Battlefield 5 is 600% more, than GeForce GT 645M.
low / 768p
50−55
50−55
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
GeForce GT 645M and GeForce GTX 660 Ti have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
230−240
medium / 768p
85−90
210−220
ultra / 1080p
35−40
120−130
QHD / 1440p
−
100−110
4K / 2160p
10−11
55−60
high / 768p
60−65
170−180
The average gaming FPS of GeForce GTX 660 Ti in Counter-Strike: Global Offensive is 159% more, than GeForce GT 645M.
low / 768p
70−75
60−65
ultra / 1080p
14−16
55−60
medium / 1080p
45−50
55−60
The average gaming FPS of GeForce GTX 660 Ti in Cyberpunk 2077 is 31% more, than GeForce GT 645M.
low / 768p
70−75
120−130
medium / 768p
45−50
110−120
ultra / 1080p
18−20
85−90
The average gaming FPS of GeForce GTX 660 Ti in Dota 2 is 136% more, than GeForce GT 645M.
high / 1080p
2−3
27−30
ultra / 1080p
2−3
24−27
QHD / 1440p
−
20−22
4K / 2160p
0−1
9−10
low / 720p
10−11
55−60
medium / 1080p
3−4
30−33
The average gaming FPS of GeForce GTX 660 Ti in Far Cry 5 is 775% more, than GeForce GT 645M.
high / 1080p
−
35−40
ultra / 1080p
5−6
27−30
QHD / 1440p
1−2
16−18
low / 720p
45−50
130−140
medium / 1080p
8−9
75−80
The average gaming FPS of GeForce GTX 660 Ti in Fortnite is 326% more, than GeForce GT 645M.
high / 1080p
3−4
35−40
ultra / 1080p
−
27−30
QHD / 1440p
0−1
16−18
4K / 2160p
−
14−16
low / 720p
14−16
75−80
medium / 1080p
6−7
40−45
The average gaming FPS of GeForce GTX 660 Ti in Forza Horizon 4 is 550% more, than GeForce GT 645M.
low / 768p
40−45
110−120
medium / 768p
−
95−100
high / 1080p
3−4
45−50
ultra / 1080p
2−3
18−20
QHD / 1440p
0−1
9−10
medium / 720p
35−40
−
The average gaming FPS of GeForce GTX 660 Ti in Grand Theft Auto V is 275% more, than GeForce GT 645M.
high / 1080p
1−2
14−16
ultra / 1080p
0−1
10−12
QHD / 1440p
−
10−12
4K / 2160p
0−1
3−4
low / 720p
3−4
40−45
medium / 1080p
2−3
20−22
The average gaming FPS of GeForce GTX 660 Ti in Metro Exodus is 1200% more, than GeForce GT 645M.
low / 768p
85−90
120−130
high / 1080p
55−60
−
medium / 1080p
−
110−120
The average gaming FPS of GeForce GTX 660 Ti in Minecraft is 43% more, than GeForce GT 645M.
high / 1080p
14−16
−
ultra / 1080p
12−14
14−16
low / 720p
24−27
75−80
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 660 Ti in PLAYERUNKNOWN'S BATTLEGROUNDS is 117% more, than GeForce GT 645M.
high / 1080p
−
16−18
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
3−4
4K / 2160p
−
2−3
low / 720p
4−5
40−45
medium / 1080p
−
21−24
The average gaming FPS of GeForce GTX 660 Ti in Red Dead Redemption 2 is 550% more, than GeForce GT 645M.
low / 768p
8−9
80−85
medium / 768p
7−8
50−55
high / 1080p
3−4
27−30
ultra / 1080p
3−4
16−18
4K / 2160p
0−1
9−10
The average gaming FPS of GeForce GTX 660 Ti in The Witcher 3: Wild Hunt is 800% more, than GeForce GT 645M.
low / 768p
70−75
90−95
medium / 768p
35−40
60−65
ultra / 1080p
12−14
40−45
high / 768p
30−33
55−60
The average gaming FPS of GeForce GTX 660 Ti in World of Tanks is 65% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
GeForce GTX 660 Ti
Architecture
Kepler
Kepler
Code name
N13P-GS
GK104
Type
Laptop
Desktop
Release date
22 March 2012
16 August 2012
Pipelines
384
1344
Core clock speed
915 MHz
Boost Clock
980 MHz
Transistor count
1,270 million
3,540 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
22.7 billion/sec
102.5 billion/sec
Floating-point performance
544.5 gflops
2,459.5 gflops
Length
9.5" (24.1 cm)
Memory bus width
128bit
192-bit GDDR5
Memory clock speed
1800 MHz
6.0 GB/s
Memory bandwidth
144.2 GB/s
Shared memory
-
-
DirectX
12 API
12 (11_0)
Shader Model
5.1
5.1
OpenGL
4.5
4.3
OpenCL
1.1
1.2
Vulkan
1.1.126
1.1.126
CUDA
+
+
CUDA cores
384
1344
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 3.0
Height
4.376" (11.1 cm)
SLI options
+
Multi monitor support
4 displays
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
Up to 2048x1536
2048x1536
Audio input for HDMI
Internal
3D Blu-Ray
+
+
3D Gaming
+
3D Vision
+
Bitcoin / BTC (SHA256)
19 Mh/s
99 Mh/s
Laptop size
medium sized
Optimus
+
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