GeForce GTX 660M vs Iris Plus Graphics 645
If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Iris Plus Graphics 645, 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 GTX 660M stacks up against Iris Plus Graphics 645, check out specs charts below.
GeForce GTX 660M and Iris Plus Graphics 645 are Laptop Graphics Cards
Note: GeForce GTX 660M and Iris Plus Graphics 645 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 GTX 660M or Iris Plus Graphics 645 here:
Main Specs
GeForce GTX 660M
Iris Plus Graphics 645
Power consumption (TDP)
50 Watt
15 Watt
Interface
MXM-B (3.0)
PCIe 3.0 x1
Memory type
GDDR5
DDR3/DDR4
Maximum RAM amount
2 GB
Display Connectors
No outputs
No outputs
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GeForce GTX 660M has 233% more power consumption, than Iris Plus Graphics 645.
GeForce GTX 660M is connected by MXM-B (3.0), and Iris Plus Graphics 645 uses PCIe 3.0 x1 interface.
Both cards are used in Laptops.
GeForce GTX 660M is build with Kepler architecture, and Iris Plus Graphics 645 - with Gen. 9.5 Coffee Lake.
Core clock speed of GeForce GTX 660M is 535 MHz higher, than Iris Plus Graphics 645.
GeForce GTX 660M is manufactured by 28 nm process technology, and Iris Plus Graphics 645 - 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
6−7
4−5
ultra / 1080p
4−5
2−3
QHD / 1440p
0−1
0−1
low / 720p
16−18
12−14
medium / 1080p
8−9
5−6
The average gaming FPS of GeForce GTX 660M in Assassin's Creed Odyssey is 50% more, than Iris Plus Graphics 645.
high / 1080p
12−14
−
ultra / 1080p
10−11
7−8
QHD / 1440p
0−1
0−1
low / 720p
24−27
16−18
medium / 1080p
12−14
8−9
The average gaming FPS of GeForce GTX 660M in Battlefield 5 is 45% more, than Iris Plus Graphics 645.
low / 768p
45−50
45−50
high / 1080p
45−50
45−50
QHD / 1440p
0−1
0−1
GeForce GTX 660M and Iris Plus Graphics 645 have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
100−110
medium / 768p
110−120
80−85
ultra / 1080p
50−55
35−40
QHD / 1440p
27−30
24−27
4K / 2160p
27−30
−
high / 768p
80−85
60−65
The average gaming FPS of GeForce GTX 660M in Counter-Strike: Global Offensive is 32% more, than Iris Plus Graphics 645.
low / 768p
55−60
55−60
ultra / 1080p
18−20
12−14
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GTX 660M in Cyberpunk 2077 is 5% more, than Iris Plus Graphics 645.
low / 768p
80−85
65−70
medium / 768p
55−60
45−50
ultra / 1080p
30−35
21−24
The average gaming FPS of GeForce GTX 660M in Dota 2 is 26% more, than Iris Plus Graphics 645.
high / 1080p
8−9
5−6
ultra / 1080p
7−8
5−6
4K / 2160p
3−4
3−4
low / 720p
18−20
12−14
medium / 1080p
8−9
5−6
The average gaming FPS of GeForce GTX 660M in Far Cry 5 is 50% more, than Iris Plus Graphics 645.
high / 1080p
14−16
12−14
ultra / 1080p
10−11
8−9
low / 720p
60−65
45−50
medium / 1080p
21−24
12−14
The average gaming FPS of GeForce GTX 660M in Fortnite is 35% more, than Iris Plus Graphics 645.
high / 1080p
12−14
8−9
ultra / 1080p
10−12
−
QHD / 1440p
1−2
0−1
low / 720p
24−27
16−18
medium / 1080p
14−16
9−10
The average gaming FPS of GeForce GTX 660M in Forza Horizon 4 is 54% more, than Iris Plus Graphics 645.
low / 768p
50−55
40−45
medium / 768p
45−50
35−40
high / 1080p
12−14
7−8
ultra / 1080p
6−7
5−6
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GTX 660M in Grand Theft Auto V is 26% more, than Iris Plus Graphics 645.
high / 1080p
4−5
3−4
ultra / 1080p
3−4
2−3
4K / 2160p
0−1
0−1
low / 720p
12−14
7−8
medium / 1080p
6−7
4−5
The average gaming FPS of GeForce GTX 660M in Metro Exodus is 50% more, than Iris Plus Graphics 645.
low / 768p
95−100
85−90
high / 1080p
90−95
80−85
ultra / 1080p
80−85
70−75
medium / 1080p
90−95
−
The average gaming FPS of GeForce GTX 660M in Minecraft is 12% more, than Iris Plus Graphics 645.
high / 1080p
16−18
16−18
ultra / 1080p
14−16
14−16
low / 720p
30−35
24−27
medium / 1080p
18−20
16−18
The average gaming FPS of GeForce GTX 660M in PLAYERUNKNOWN'S BATTLEGROUNDS is 11% more, than Iris Plus Graphics 645.
ultra / 1080p
7−8
7−8
QHD / 1440p
0−1
0−1
low / 720p
12−14
7−8
medium / 1080p
10−12
−
The average gaming FPS of GeForce GTX 660M in Red Dead Redemption 2 is 42% more, than Iris Plus Graphics 645.
low / 768p
24−27
16−18
medium / 768p
16−18
12−14
high / 1080p
9−10
6−7
ultra / 1080p
6−7
5−6
4K / 2160p
6−7
−
The average gaming FPS of GeForce GTX 660M in The Witcher 3: Wild Hunt is 40% more, than Iris Plus Graphics 645.
low / 768p
85−90
80−85
medium / 768p
45−50
35−40
ultra / 1080p
18−20
14−16
high / 768p
35−40
30−33
The average gaming FPS of GeForce GTX 660M in World of Tanks is 14% more, than Iris Plus Graphics 645.
Full Specs
GeForce GTX 660M
Iris Plus Graphics 645
Architecture
Kepler
Gen. 9.5 Coffee Lake
Code name
N13E-GE
Kaby Lake GT3e
Type
Laptop
Laptop
Release date
22 March 2012
10 July 2019
Pipelines
384
48
Core clock speed
835 MHz
300 MHz
Boost Clock
950 MHz
1150 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
30.4 billion/sec
50.40
Floating-point performance
729.6 gflops
Memory bus width
128bit
Memory clock speed
2000 MHz
Memory bandwidth
64.0 GB/s
Shared memory
-
+
DirectX
12 API
12 (12_1)
Shader Model
5.1
6.4
OpenGL
4.5
4.6
OpenCL
1.1
2.1
Vulkan
1.1.126
1.1.103
CUDA
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
SLI options
+
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
Bitcoin / BTC (SHA256)
36 Mh/s
Laptop size
large
Optimus
+
Quick Sync
+
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