GeForce GTX 660M vs Iris Pro Graphics P580
In this comparison between GeForce GTX 660M and Iris Pro Graphics P580 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 GTX 660M will be the best choice, for others Iris Pro Graphics P580 will be their preference. Study the comparison tables below and make your choice.
GeForce GTX 660M and Iris Pro Graphics P580 are Laptop Graphics Cards
Note: GeForce GTX 660M and Iris Pro Graphics P580 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 Pro Graphics P580 here:
Main Specs
GeForce GTX 660M
Iris Pro Graphics P580
Power consumption (TDP)
50 Watt
15 Watt
Interface
MXM-B (3.0)
PCIe 3.0 x1
Memory type
GDDR5
DDR3L/LPDDR3/DDR4
Maximum RAM amount
2 GB
64 GB
Display Connectors
No outputs
No outputs
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GeForce GTX 660M has 233% more power consumption, than Iris Pro Graphics P580.
GeForce GTX 660M is connected by MXM-B (3.0), and Iris Pro Graphics P580 uses PCIe 3.0 x1 interface.
Iris Pro Graphics P580 has 62 GB more memory, than GeForce GTX 660M.
Both cards are used in Laptops.
GeForce GTX 660M is build with Kepler architecture, and Iris Pro Graphics P580 - with Gen. 9 Skylake.
Core clock speed of GeForce GTX 660M is 485 MHz higher, than Iris Pro Graphics P580.
GeForce GTX 660M is manufactured by 28 nm process technology, and Iris Pro Graphics P580 - 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
10−11
ultra / 1080p
4−5
6−7
QHD / 1440p
0−1
0−1
low / 720p
16−18
21−24
medium / 1080p
8−9
12−14
The average gaming FPS of Iris Pro Graphics P580 in Assassin's Creed Odyssey is 44% more, than GeForce GTX 660M.
high / 1080p
12−14
16−18
ultra / 1080p
10−11
14−16
QHD / 1440p
0−1
0−1
low / 720p
24−27
35−40
medium / 1080p
12−14
18−20
The average gaming FPS of Iris Pro Graphics P580 in Battlefield 5 is 46% more, than GeForce GTX 660M.
low / 768p
45−50
45−50
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
GeForce GTX 660M and Iris Pro Graphics P580 have the same average FPS in Call of Duty: Warzone.
low / 768p
130−140
170−180
medium / 768p
110−120
140−150
ultra / 1080p
50−55
70−75
QHD / 1440p
27−30
40−45
4K / 2160p
27−30
30−33
high / 768p
80−85
100−110
The average gaming FPS of Iris Pro Graphics P580 in Counter-Strike: Global Offensive is 30% more, than GeForce GTX 660M.
low / 768p
55−60
55−60
ultra / 1080p
18−20
27−30
medium / 1080p
45−50
45−50
The average gaming FPS of Iris Pro Graphics P580 in Cyberpunk 2077 is 7% more, than GeForce GTX 660M.
low / 768p
80−85
90−95
medium / 768p
55−60
75−80
ultra / 1080p
30−35
45−50
The average gaming FPS of Iris Pro Graphics P580 in Dota 2 is 26% more, than GeForce GTX 660M.
high / 1080p
8−9
10−12
ultra / 1080p
7−8
10−12
4K / 2160p
3−4
4−5
low / 720p
18−20
27−30
medium / 1080p
8−9
12−14
The average gaming FPS of Iris Pro Graphics P580 in Far Cry 5 is 44% more, than GeForce GTX 660M.
high / 1080p
14−16
18−20
ultra / 1080p
10−11
12−14
low / 720p
60−65
75−80
medium / 1080p
21−24
35−40
The average gaming FPS of Iris Pro Graphics P580 in Fortnite is 33% more, than GeForce GTX 660M.
high / 1080p
12−14
16−18
ultra / 1080p
10−12
14−16
QHD / 1440p
1−2
4−5
low / 720p
24−27
35−40
medium / 1080p
14−16
18−20
The average gaming FPS of Iris Pro Graphics P580 in Forza Horizon 4 is 38% more, than GeForce GTX 660M.
low / 768p
50−55
65−70
medium / 768p
45−50
55−60
high / 1080p
12−14
18−20
ultra / 1080p
6−7
8−9
QHD / 1440p
0−1
0−1
The average gaming FPS of Iris Pro Graphics P580 in Grand Theft Auto V is 31% more, than GeForce GTX 660M.
high / 1080p
4−5
6−7
ultra / 1080p
3−4
5−6
4K / 2160p
0−1
1−2
low / 720p
12−14
18−20
medium / 1080p
6−7
9−10
The average gaming FPS of Iris Pro Graphics P580 in Metro Exodus is 66% more, than GeForce GTX 660M.
low / 768p
95−100
100−110
high / 1080p
90−95
−
ultra / 1080p
80−85
90−95
medium / 1080p
90−95
95−100
The average gaming FPS of Iris Pro Graphics P580 in Minecraft is 8% more, than GeForce GTX 660M.
high / 1080p
16−18
18−20
ultra / 1080p
14−16
14−16
low / 720p
30−35
40−45
medium / 1080p
18−20
20−22
The average gaming FPS of Iris Pro Graphics P580 in PLAYERUNKNOWN'S BATTLEGROUNDS is 20% more, than GeForce GTX 660M.
high / 1080p
−
12−14
ultra / 1080p
7−8
8−9
QHD / 1440p
0−1
0−1
low / 720p
12−14
18−20
medium / 1080p
10−12
12−14
The average gaming FPS of Iris Pro Graphics P580 in Red Dead Redemption 2 is 30% more, than GeForce GTX 660M.
low / 768p
24−27
35−40
medium / 768p
16−18
21−24
high / 1080p
9−10
12−14
ultra / 1080p
6−7
8−9
4K / 2160p
6−7
7−8
The average gaming FPS of Iris Pro Graphics P580 in The Witcher 3: Wild Hunt is 30% more, than GeForce GTX 660M.
low / 768p
85−90
90−95
medium / 768p
45−50
50−55
ultra / 1080p
18−20
24−27
high / 768p
35−40
40−45
The average gaming FPS of Iris Pro Graphics P580 in World of Tanks is 12% more, than GeForce GTX 660M.
Full Specs
GeForce GTX 660M
Iris Pro Graphics P580
Architecture
Kepler
Gen. 9 Skylake
Code name
N13E-GE
Skylake GT4e
Type
Laptop
Laptop
Release date
22 March 2012
1 September 2015
Pipelines
384
72
Core clock speed
835 MHz
350 MHz
Boost Clock
950 MHz
1100 MHz
Transistor count
1,270 million
189 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
30.4 billion/sec
75.60
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
1.1.97
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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