GeForce GT 640M vs Maxwell GPU Surface Book 940M GDDR5
If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Maxwell GPU Surface Book 940M GDDR5, 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 640M stacks up against Maxwell GPU Surface Book 940M GDDR5, check out specs charts below.
GeForce GT 640M and Maxwell GPU Surface Book 940M GDDR5 are Laptop Graphics Cards
Note: GeForce GT 640M and Maxwell GPU Surface Book 940M GDDR5 are only used in laptop graphics. They have 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 640M or Maxwell GPU Surface Book 940M GDDR5 here:
Main Specs
GeForce GT 640M
Maxwell GPU Surface Book 940M GDDR5
Power consumption (TDP)
32 Watt
Interface
PCIe 3.0 x16
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Display Connectors
No outputs
Check Price
Check Price
GeForce GT 640M has 1 GB more memory, than Maxwell GPU Surface Book 940M GDDR5.
Both cards are used in Laptops.
GeForce GT 640M is build with Kepler architecture, and Maxwell GPU Surface Book 940M GDDR5 - with Maxwell.
GeForce GT 640M and Maxwell GPU Surface Book 940M GDDR5 are manufactured by 28 nm process technology.
Memory clock speed of Maxwell GPU Surface Book 940M GDDR5 is 3212 MHz higher, than GeForce GT 640M.
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
0−1
9−10
ultra / 1080p
0−1
5−6
QHD / 1440p
0−1
0−1
low / 720p
10−12
21−24
medium / 1080p
2−3
12−14
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Assassin's Creed Odyssey is 183% more, than GeForce GT 640M.
high / 1080p
−
16−18
ultra / 1080p
3−4
14−16
QHD / 1440p
0−1
0−1
low / 720p
12−14
30−35
medium / 1080p
4−5
16−18
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Battlefield 5 is 200% more, than GeForce GT 640M.
low / 768p
50−55
45−50
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640M in Call of Duty: Warzone is 10% more, than Maxwell GPU Surface Book 940M GDDR5.
low / 768p
110−120
160−170
medium / 768p
85−90
130−140
ultra / 1080p
35−40
70−75
QHD / 1440p
−
40−45
4K / 2160p
10−11
30−33
high / 768p
55−60
100−110
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Counter-Strike: Global Offensive is 65% more, than GeForce GT 640M.
low / 768p
70−75
55−60
ultra / 1080p
12−14
27−30
medium / 1080p
45−50
45−50
GeForce GT 640M and Maxwell GPU Surface Book 940M GDDR5 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
90−95
medium / 768p
40−45
70−75
ultra / 1080p
18−20
45−50
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Dota 2 is 59% more, than GeForce GT 640M.
high / 1080p
2−3
10−12
ultra / 1080p
2−3
10−11
4K / 2160p
0−1
4−5
low / 720p
9−10
24−27
medium / 1080p
3−4
12−14
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Far Cry 5 is 275% more, than GeForce GT 640M.
high / 1080p
−
18−20
ultra / 1080p
5−6
12−14
QHD / 1440p
1−2
−
low / 720p
45−50
75−80
medium / 1080p
7−8
30−35
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Fortnite is 105% more, than GeForce GT 640M.
high / 1080p
2−3
16−18
ultra / 1080p
−
14−16
QHD / 1440p
0−1
4−5
low / 720p
14−16
35−40
medium / 1080p
5−6
18−20
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Forza Horizon 4 is 242% more, than GeForce GT 640M.
low / 768p
40−45
65−70
medium / 768p
−
55−60
high / 1080p
3−4
18−20
ultra / 1080p
2−3
8−9
QHD / 1440p
0−1
0−1
medium / 720p
30−35
−
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Grand Theft Auto V is 93% more, than GeForce GT 640M.
high / 1080p
1−2
6−7
ultra / 1080p
0−1
4−5
4K / 2160p
0−1
1−2
low / 720p
2−3
18−20
medium / 1080p
2−3
8−9
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Metro Exodus is 450% more, than GeForce GT 640M.
low / 768p
85−90
100−110
high / 1080p
55−60
−
ultra / 1080p
−
90−95
medium / 1080p
−
95−100
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Minecraft is 20% more, than GeForce GT 640M.
high / 1080p
14−16
18−20
ultra / 1080p
12−14
14−16
low / 720p
24−27
40−45
medium / 1080p
14−16
20−22
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in PLAYERUNKNOWN'S BATTLEGROUNDS is 41% more, than GeForce GT 640M.
high / 1080p
−
12−14
ultra / 1080p
3−4
8−9
QHD / 1440p
0−1
0−1
low / 720p
3−4
18−20
medium / 1080p
−
12−14
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Red Dead Redemption 2 is 333% more, than GeForce GT 640M.
low / 768p
7−8
35−40
medium / 768p
6−7
21−24
high / 1080p
3−4
12−14
ultra / 1080p
−
8−9
4K / 2160p
0−1
7−8
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in The Witcher 3: Wild Hunt is 380% more, than GeForce GT 640M.
low / 768p
70−75
90−95
medium / 768p
35−40
50−55
ultra / 1080p
12−14
24−27
high / 768p
27−30
40−45
The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in World of Tanks is 43% more, than GeForce GT 640M.
Full Specs
GeForce GT 640M
Maxwell GPU Surface Book 940M GDDR5
Architecture
Kepler
Maxwell
Code name
N13P-GS
Surface Book
Type
Laptop
Laptop
Release date
22 March 2012
1 October 2015
Pipelines
384
384
Core clock speed
954 MHz
Boost Clock
645 MHz
993 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
28 nm
Floating-point performance
480.0 gflops
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
5012 MHz
Shared memory
-
-
DirectX
12 API
DirectX 12 (FL 11_0), Shader 5.0
Shader Model
5.1
OpenGL
4.5
OpenCL
1.1
Vulkan
1.1.126
CUDA
+
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
18 Mh/s
Laptop size
medium sized
Optimus
+
+
Check Price
Check Price