GeForce GT 645M vs GeForce GTX 275
In this comparison between GeForce GT 645M and GeForce GTX 275 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GT 645M will be the best choice, for others GeForce GTX 275 will be their preference. Study the comparison tables below and make your choice.
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 275
Power consumption (TDP)
32 Watt
219 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
Memory type
DDR3\GDDR5
GDDR3
Maximum RAM amount
2 GB
896 MB
Display Connectors
No outputs
2x DVI
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GeForce GTX 275 has 584% more power consumption, than GeForce GT 645M.
GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 275 uses PCIe 2.0 x16 interface.
GeForce GTX 275 has 894 GB more memory, than GeForce GT 645M.
GeForce GT 645M is used in Laptops, and GeForce GTX 275 - in Desktops.
GeForce GT 645M is build with Kepler architecture, and GeForce GTX 275 - with Tesla 2.0.
GeForce GT 645M is manufactured by 28 nm process technology, and GeForce GTX 275 - by 55 nm process technology.
Memory clock speed of GeForce GT 645M is 666 MHz higher, than GeForce GTX 275.
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
6−7
ultra / 1080p
0−1
4−5
QHD / 1440p
0−1
0−1
low / 720p
12−14
16−18
medium / 1080p
2−3
8−9
The average gaming FPS of GeForce GTX 275 in Assassin's Creed Odyssey is 100% more, than GeForce GT 645M.
high / 1080p
−
10−12
ultra / 1080p
3−4
10−11
QHD / 1440p
0−1
0−1
low / 720p
12−14
24−27
medium / 1080p
4−5
12−14
The average gaming FPS of GeForce GTX 275 in Battlefield 5 is 128% more, than GeForce GT 645M.
low / 768p
50−55
45−50
high / 1080p
45−50
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 6% more, than GeForce GTX 275.
low / 768p
110−120
130−140
medium / 768p
85−90
100−110
ultra / 1080p
35−40
50−55
QHD / 1440p
−
27−30
4K / 2160p
10−11
27−30
high / 768p
60−65
75−80
The average gaming FPS of GeForce GTX 275 in Counter-Strike: Global Offensive is 27% more, than GeForce GT 645M.
low / 768p
70−75
55−60
ultra / 1080p
14−16
18−20
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GT 645M in Cyberpunk 2077 is 9% more, than GeForce GTX 275.
low / 768p
70−75
75−80
medium / 768p
45−50
55−60
ultra / 1080p
18−20
30−35
The average gaming FPS of GeForce GTX 275 in Dota 2 is 19% more, than GeForce GT 645M.
high / 1080p
2−3
8−9
ultra / 1080p
2−3
7−8
4K / 2160p
0−1
3−4
low / 720p
10−11
18−20
medium / 1080p
3−4
8−9
The average gaming FPS of GeForce GTX 275 in Far Cry 5 is 150% more, than GeForce GT 645M.
high / 1080p
−
14−16
ultra / 1080p
5−6
10−11
QHD / 1440p
1−2
−
low / 720p
45−50
60−65
medium / 1080p
8−9
21−24
The average gaming FPS of GeForce GTX 275 in Fortnite is 55% more, than GeForce GT 645M.
high / 1080p
3−4
12−14
ultra / 1080p
−
10−12
QHD / 1440p
0−1
1−2
low / 720p
14−16
24−27
medium / 1080p
6−7
12−14
The average gaming FPS of GeForce GTX 275 in Forza Horizon 4 is 112% more, than GeForce GT 645M.
low / 768p
40−45
50−55
medium / 768p
−
45−50
high / 1080p
3−4
12−14
ultra / 1080p
2−3
6−7
QHD / 1440p
0−1
0−1
medium / 720p
35−40
−
The average gaming FPS of GeForce GTX 275 in Grand Theft Auto V is 50% more, than GeForce GT 645M.
high / 1080p
1−2
4−5
ultra / 1080p
0−1
3−4
4K / 2160p
0−1
0−1
low / 720p
3−4
12−14
medium / 1080p
2−3
6−7
The average gaming FPS of GeForce GTX 275 in Metro Exodus is 300% more, than GeForce GT 645M.
low / 768p
85−90
90−95
high / 1080p
55−60
85−90
ultra / 1080p
−
80−85
medium / 1080p
−
90−95
The average gaming FPS of GeForce GTX 275 in Minecraft is 25% more, than GeForce GT 645M.
high / 1080p
14−16
16−18
ultra / 1080p
12−14
14−16
low / 720p
24−27
30−35
medium / 1080p
14−16
18−20
The average gaming FPS of GeForce GTX 275 in PLAYERUNKNOWN'S BATTLEGROUNDS is 17% more, than GeForce GT 645M.
ultra / 1080p
3−4
7−8
QHD / 1440p
0−1
0−1
low / 720p
4−5
10−12
medium / 1080p
−
10−12
The average gaming FPS of GeForce GTX 275 in Red Dead Redemption 2 is 125% more, than GeForce GT 645M.
low / 768p
8−9
24−27
medium / 768p
7−8
16−18
high / 1080p
3−4
9−10
ultra / 1080p
3−4
6−7
4K / 2160p
0−1
−
The average gaming FPS of GeForce GTX 275 in The Witcher 3: Wild Hunt is 180% more, than GeForce GT 645M.
low / 768p
70−75
85−90
medium / 768p
35−40
40−45
ultra / 1080p
12−14
18−20
high / 768p
30−33
35−40
The average gaming FPS of GeForce GTX 275 in World of Tanks is 21% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
GeForce GTX 275
Architecture
Kepler
Tesla 2.0
Code name
N13P-GS
GT200B
Type
Laptop
Desktop
Release date
22 March 2012
15 January 2009
Pipelines
384
240
Core clock speed
1404 MHz
Transistor count
1,270 million
1,400 million
Manufacturing process technology
28 nm
55 nm
Texture fill rate
22.7 billion/sec
50.6 billion/sec
Floating-point performance
544.5 gflops
673.9 gflops
Length
10.5" (267 mm) (26.7 cm)
Memory bus width
128bit
448 Bit
Memory clock speed
1800 MHz
1134 MHz
Memory bandwidth
127.0 GB/s
Shared memory
-
DirectX
12 API
11.1 (10_0)
Shader Model
5.1
4.0
OpenGL
4.5
3.0
OpenCL
1.1
1.1
Vulkan
1.1.126
N/A
CUDA
+
+
CUDA cores
384
240
Bus support
PCI Express 2.0, PCI Express 3.0
PCI-E 2.0
Height
4.376" (111 mm) (11.1 cm)
SLI options
+
Multi monitor support
+
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
2048x1536
Audio input for HDMI
S/PDIF
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
19 Mh/s
Laptop size
medium sized
Optimus
+
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