GeForce GT 640 vs Iris Plus Graphics 655
When choosing between GeForce GT 640 and Iris Plus Graphics 655, 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 640 and Iris Plus Graphics 655.
Iris Plus Graphics 655 is a Laptop Graphics Card
Note: Iris Plus Graphics 655 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 Iris Plus Graphics 655 here:
Main Specs
GeForce GT 640
Iris Plus Graphics 655
Power consumption (TDP)
65 Watt
15 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Supplementary power connectors
None
Memory type
DDR3
DDR3/DDR4
Maximum RAM amount
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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GeForce GT 640 has 333% more power consumption, than Iris Plus Graphics 655.
GeForce GT 640 is connected by PCIe 3.0 x16, and Iris Plus Graphics 655 uses PCIe 3.0 x1 interface.
GeForce GT 640 is used in Desktops, and Iris Plus Graphics 655 - in Laptops.
GeForce GT 640 is build with Kepler architecture, and Iris Plus Graphics 655 - with Gen. 9.5 Kaby Lake.
Core clock speed of GeForce GT 640 is 602 MHz higher, than Iris Plus Graphics 655.
GeForce GT 640 is manufactured by 28 nm process technology, and Iris Plus Graphics 655 - by 14 nm process technology.
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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655.
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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 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 Iris Plus Graphics 655 in World of Tanks is 53% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Iris Plus Graphics 655
Architecture
Kepler
Gen. 9.5 Kaby Lake
Code name
GK107
Kaby Lake GT3e
Type
Desktop
Laptop
Release date
5 June 2012
1 September 2017
Pipelines
384
48
Core clock speed
902 MHz
300 MHz
Boost Clock
1200 MHz
Transistor count
1,270 million
189 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
28.86
50.40
Floating-point performance
692.7 gflops
Length
145 mm
Memory bus width
128 Bit
Memory clock speed
1782 MHz
Memory bandwidth
28.51 GB/s
Shared memory
+
DirectX
12 (11_0)
12 (12_1)
Shader Model
5.1
6.4
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.1.126
1.1.103
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
Quick Sync
+
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