GeForce GT 645M vs Iris Pro Graphics P580
In this comparison between GeForce GT 645M 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 GT 645M 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 GT 645M and Iris Pro Graphics P580 are Laptop Graphics Cards
Note: GeForce GT 645M 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 GT 645M or Iris Pro Graphics P580 here:
Main Specs
GeForce GT 645M
Iris Pro Graphics P580
Power consumption (TDP)
32 Watt
15 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Memory type
DDR3\GDDR5
DDR3L/LPDDR3/DDR4
Maximum RAM amount
2 GB
64 GB
Display Connectors
No outputs
No outputs
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GeForce GT 645M has 113% more power consumption, than Iris Pro Graphics P580.
GeForce GT 645M is connected by PCIe 3.0 x16, and Iris Pro Graphics P580 uses PCIe 3.0 x1 interface.
Iris Pro Graphics P580 has 62 GB more memory, than GeForce GT 645M.
Both cards are used in Laptops.
GeForce GT 645M is build with Kepler architecture, and Iris Pro Graphics P580 - with Gen. 9 Skylake.
GeForce GT 645M 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
1−2
10−11
ultra / 1080p
0−1
6−7
QHD / 1440p
0−1
0−1
low / 720p
12−14
21−24
medium / 1080p
2−3
12−14
The average gaming FPS of Iris Pro Graphics P580 in Assassin's Creed Odyssey is 200% more, than GeForce GT 645M.
high / 1080p
−
16−18
ultra / 1080p
3−4
14−16
QHD / 1440p
0−1
0−1
low / 720p
12−14
35−40
medium / 1080p
4−5
18−20
The average gaming FPS of Iris Pro Graphics P580 in Battlefield 5 is 228% more, than GeForce GT 645M.
low / 768p
50−55
45−50
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 10% more, than Iris Pro Graphics P580.
low / 768p
110−120
170−180
medium / 768p
85−90
140−150
ultra / 1080p
35−40
70−75
QHD / 1440p
−
40−45
4K / 2160p
10−11
30−33
high / 768p
60−65
100−110
The average gaming FPS of Iris Pro Graphics P580 in Counter-Strike: Global Offensive is 69% more, than GeForce GT 645M.
low / 768p
70−75
55−60
ultra / 1080p
14−16
27−30
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GT 645M in Cyberpunk 2077 is 2% more, than Iris Pro Graphics P580.
low / 768p
70−75
90−95
medium / 768p
45−50
75−80
ultra / 1080p
18−20
45−50
The average gaming FPS of Iris Pro Graphics P580 in Dota 2 is 56% more, than GeForce GT 645M.
high / 1080p
2−3
10−12
ultra / 1080p
2−3
10−12
4K / 2160p
0−1
4−5
low / 720p
10−11
27−30
medium / 1080p
3−4
12−14
The average gaming FPS of Iris Pro Graphics P580 in Far Cry 5 is 275% more, than GeForce GT 645M.
high / 1080p
−
18−20
ultra / 1080p
5−6
12−14
QHD / 1440p
1−2
−
low / 720p
45−50
75−80
medium / 1080p
8−9
35−40
The average gaming FPS of Iris Pro Graphics P580 in Fortnite is 110% more, than GeForce GT 645M.
high / 1080p
3−4
16−18
ultra / 1080p
−
14−16
QHD / 1440p
0−1
4−5
low / 720p
14−16
35−40
medium / 1080p
6−7
18−20
The average gaming FPS of Iris Pro Graphics P580 in Forza Horizon 4 is 200% more, than GeForce GT 645M.
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
35−40
−
The average gaming FPS of Iris Pro Graphics P580 in Grand Theft Auto V is 93% more, than GeForce GT 645M.
high / 1080p
1−2
6−7
ultra / 1080p
0−1
5−6
4K / 2160p
0−1
1−2
low / 720p
3−4
18−20
medium / 1080p
2−3
9−10
The average gaming FPS of Iris Pro Graphics P580 in Metro Exodus is 450% more, than GeForce GT 645M.
low / 768p
85−90
100−110
high / 1080p
55−60
−
ultra / 1080p
−
90−95
medium / 1080p
−
95−100
The average gaming FPS of Iris Pro Graphics P580 in Minecraft is 20% more, than GeForce GT 645M.
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 Iris Pro Graphics P580 in PLAYERUNKNOWN'S BATTLEGROUNDS is 41% more, than GeForce GT 645M.
high / 1080p
−
12−14
ultra / 1080p
3−4
8−9
QHD / 1440p
0−1
0−1
low / 720p
4−5
18−20
medium / 1080p
−
12−14
The average gaming FPS of Iris Pro Graphics P580 in Red Dead Redemption 2 is 225% more, than GeForce GT 645M.
low / 768p
8−9
35−40
medium / 768p
7−8
21−24
high / 1080p
3−4
12−14
ultra / 1080p
3−4
8−9
4K / 2160p
0−1
7−8
The average gaming FPS of Iris Pro Graphics P580 in The Witcher 3: Wild Hunt is 300% more, than GeForce GT 645M.
low / 768p
70−75
90−95
medium / 768p
35−40
50−55
ultra / 1080p
12−14
24−27
high / 768p
30−33
40−45
The average gaming FPS of Iris Pro Graphics P580 in World of Tanks is 39% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
Iris Pro Graphics P580
Architecture
Kepler
Gen. 9 Skylake
Code name
N13P-GS
Skylake GT4e
Type
Laptop
Laptop
Release date
22 March 2012
1 September 2015
Pipelines
384
72
Core clock speed
350 MHz
Boost Clock
1100 MHz
Transistor count
1,270 million
189 million
Manufacturing process technology
28 nm
14 nm
Texture fill rate
22.7 billion/sec
75.60
Floating-point performance
544.5 gflops
Memory bus width
128bit
Memory clock speed
1800 MHz
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
HDMI
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
19 Mh/s
Laptop size
medium sized
Optimus
+
Quick Sync
+
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