Iris Plus Graphics 645 vs Radeon HD 7870M
If you are going to buy a new graphics card and are choosing between Iris Plus Graphics 645 and Radeon HD 7870M, 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 Iris Plus Graphics 645 stacks up against Radeon HD 7870M, check out specs charts below.
Iris Plus Graphics 645 and Radeon HD 7870M are Laptop Graphics Cards
Note: Iris Plus Graphics 645 and Radeon HD 7870M 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 Iris Plus Graphics 645 or Radeon HD 7870M here:
Main Specs
Iris Plus Graphics 645
Radeon HD 7870M
Power consumption (TDP)
15 Watt
45 Watt
Interface
PCIe 3.0 x1
PCIe 3.0 x16
Memory type
DDR3/DDR4
GDDR5
Maximum RAM amount
2 GB
Display Connectors
No outputs
No outputs
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Radeon HD 7870M has 200% more power consumption, than Iris Plus Graphics 645.
Iris Plus Graphics 645 is connected by PCIe 3.0 x1, and Radeon HD 7870M uses PCIe 3.0 x16 interface.
Both cards are used in Laptops.
Iris Plus Graphics 645 is build with Gen. 9.5 Coffee Lake architecture, and Radeon HD 7870M - with GCN.
Core clock speed of Radeon HD 7870M is 500 MHz higher, than Iris Plus Graphics 645.
Iris Plus Graphics 645 is manufactured by 14 nm process technology, and Radeon HD 7870M - by 28 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
4−5
6−7
ultra / 1080p
2−3
4−5
QHD / 1440p
0−1
0−1
low / 720p
12−14
16−18
medium / 1080p
5−6
8−9
The average gaming FPS of Radeon HD 7870M in Assassin's Creed Odyssey is 50% more, than Iris Plus Graphics 645.
high / 1080p
−
12−14
ultra / 1080p
7−8
10−11
QHD / 1440p
0−1
0−1
low / 720p
16−18
24−27
medium / 1080p
8−9
12−14
The average gaming FPS of Radeon HD 7870M 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
Iris Plus Graphics 645 and Radeon HD 7870M have the same average FPS in Call of Duty: Warzone.
low / 768p
100−110
130−140
medium / 768p
80−85
110−120
ultra / 1080p
35−40
50−55
QHD / 1440p
24−27
30−33
4K / 2160p
−
27−30
high / 768p
60−65
80−85
The average gaming FPS of Radeon HD 7870M in Counter-Strike: Global Offensive is 33% more, than Iris Plus Graphics 645.
low / 768p
55−60
55−60
ultra / 1080p
12−14
18−20
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon HD 7870M in Cyberpunk 2077 is 5% more, than Iris Plus Graphics 645.
low / 768p
65−70
80−85
medium / 768p
45−50
60−65
ultra / 1080p
21−24
30−35
The average gaming FPS of Radeon HD 7870M in Dota 2 is 31% more, than Iris Plus Graphics 645.
high / 1080p
5−6
8−9
ultra / 1080p
5−6
8−9
4K / 2160p
3−4
3−4
low / 720p
12−14
18−20
medium / 1080p
5−6
9−10
The average gaming FPS of Radeon HD 7870M in Far Cry 5 is 50% more, than Iris Plus Graphics 645.
high / 1080p
12−14
14−16
ultra / 1080p
8−9
10−11
low / 720p
45−50
60−65
medium / 1080p
12−14
21−24
The average gaming FPS of Radeon HD 7870M in Fortnite is 35% more, than Iris Plus Graphics 645.
high / 1080p
8−9
12−14
ultra / 1080p
−
10−12
QHD / 1440p
0−1
1−2
low / 720p
16−18
24−27
medium / 1080p
9−10
14−16
The average gaming FPS of Radeon HD 7870M in Forza Horizon 4 is 54% more, than Iris Plus Graphics 645.
low / 768p
40−45
50−55
medium / 768p
35−40
45−50
high / 1080p
7−8
12−14
ultra / 1080p
5−6
6−7
QHD / 1440p
0−1
0−1
The average gaming FPS of Radeon HD 7870M in Grand Theft Auto V is 26% more, than Iris Plus Graphics 645.
high / 1080p
3−4
5−6
ultra / 1080p
2−3
3−4
4K / 2160p
0−1
0−1
low / 720p
7−8
12−14
medium / 1080p
4−5
6−7
The average gaming FPS of Radeon HD 7870M in Metro Exodus is 75% more, than Iris Plus Graphics 645.
low / 768p
85−90
95−100
high / 1080p
80−85
90−95
ultra / 1080p
70−75
80−85
medium / 1080p
−
90−95
The average gaming FPS of Radeon HD 7870M in Minecraft is 12% more, than Iris Plus Graphics 645.
high / 1080p
16−18
16−18
ultra / 1080p
14−16
14−16
low / 720p
24−27
30−35
medium / 1080p
16−18
18−20
The average gaming FPS of Radeon HD 7870M 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
7−8
12−14
medium / 1080p
−
10−12
The average gaming FPS of Radeon HD 7870M in Red Dead Redemption 2 is 42% more, than Iris Plus Graphics 645.
low / 768p
16−18
24−27
medium / 768p
12−14
16−18
high / 1080p
6−7
9−10
ultra / 1080p
5−6
6−7
4K / 2160p
−
6−7
The average gaming FPS of Radeon HD 7870M in The Witcher 3: Wild Hunt is 40% more, than Iris Plus Graphics 645.
low / 768p
80−85
85−90
medium / 768p
35−40
45−50
ultra / 1080p
14−16
20−22
high / 768p
30−33
35−40
The average gaming FPS of Radeon HD 7870M in World of Tanks is 17% more, than Iris Plus Graphics 645.
Full Specs
Iris Plus Graphics 645
Radeon HD 7870M
Architecture
Gen. 9.5 Coffee Lake
GCN
Code name
Kaby Lake GT3e
Heathrow XT
Type
Laptop
Laptop
Release date
10 July 2019
24 April 2012
Pipelines
48
640
Core clock speed
300 MHz
800 MHz
Boost Clock
1150 MHz
Transistor count
1,500 million
Manufacturing process technology
14 nm
28 nm
Texture fill rate
50.40
32.00
Floating-point performance
1,024 gflops
Memory bus width
128 Bit
Memory clock speed
4000 MHz
Memory bandwidth
64 GB/s
Shared memory
+
-
DirectX
12 (12_1)
12 (11_1)
Shader Model
6.4
5.1
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.1.103
1.2.131
Laptop size
large
Quick Sync
+
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