GeForce GT 645M vs Radeon HD 8870M
If you are going to buy a new graphics card and are choosing between GeForce GT 645M and Radeon HD 8870M, 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 GT 645M stacks up against Radeon HD 8870M, check out specs charts below.
GeForce GT 645M and Radeon HD 8870M are Laptop Graphics Cards
Note: GeForce GT 645M and Radeon HD 8870M 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 Radeon HD 8870M here:
Main Specs
GeForce GT 645M
Radeon HD 8870M
Power consumption (TDP)
32 Watt
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Memory type
DDR3\GDDR5
GDDR5, DDR3
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
No outputs
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Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
GeForce GT 645M and Radeon HD 8870M have maximum RAM of 2 GB.
Both cards are used in Laptops.
GeForce GT 645M is build with Kepler architecture, and Radeon HD 8870M - with GCN.
GeForce GT 645M and Radeon HD 8870M are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 8870M is 2700 MHz higher, than GeForce GT 645M.
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
7−8
ultra / 1080p
0−1
4−5
QHD / 1440p
0−1
0−1
low / 720p
12−14
18−20
medium / 1080p
2−3
9−10
The average gaming FPS of Radeon HD 8870M in Assassin's Creed Odyssey is 140% more, than GeForce GT 645M.
high / 1080p
−
12−14
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
0−1
low / 720p
12−14
27−30
medium / 1080p
4−5
14−16
The average gaming FPS of Radeon HD 8870M in Battlefield 5 is 157% more, than GeForce GT 645M.
low / 768p
50−55
45−50
high / 1080p
45−50
45−50
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 6% more, than Radeon HD 8870M.
low / 768p
110−120
140−150
medium / 768p
85−90
110−120
ultra / 1080p
35−40
55−60
QHD / 1440p
−
30−35
4K / 2160p
10−11
27−30
high / 768p
60−65
85−90
The average gaming FPS of Radeon HD 8870M in Counter-Strike: Global Offensive is 38% more, than GeForce GT 645M.
low / 768p
70−75
55−60
ultra / 1080p
14−16
21−24
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GT 645M in Cyberpunk 2077 is 7% more, than Radeon HD 8870M.
low / 768p
70−75
85−90
medium / 768p
45−50
60−65
ultra / 1080p
18−20
35−40
The average gaming FPS of Radeon HD 8870M in Dota 2 is 34% more, than GeForce GT 645M.
high / 1080p
2−3
9−10
ultra / 1080p
2−3
8−9
4K / 2160p
0−1
4−5
low / 720p
10−11
21−24
medium / 1080p
3−4
10−11
The average gaming FPS of Radeon HD 8870M in Far Cry 5 is 200% more, than GeForce GT 645M.
high / 1080p
−
16−18
ultra / 1080p
5−6
10−12
QHD / 1440p
1−2
−
low / 720p
45−50
65−70
medium / 1080p
8−9
24−27
The average gaming FPS of Radeon HD 8870M in Fortnite is 70% more, than GeForce GT 645M.
high / 1080p
3−4
12−14
ultra / 1080p
−
12−14
QHD / 1440p
0−1
2−3
low / 720p
14−16
27−30
medium / 1080p
6−7
14−16
The average gaming FPS of Radeon HD 8870M in Forza Horizon 4 is 125% more, than GeForce GT 645M.
low / 768p
40−45
55−60
medium / 768p
−
45−50
high / 1080p
3−4
14−16
ultra / 1080p
2−3
7−8
QHD / 1440p
0−1
0−1
medium / 720p
35−40
−
The average gaming FPS of Radeon HD 8870M in Grand Theft Auto V is 62% more, than GeForce GT 645M.
high / 1080p
1−2
5−6
ultra / 1080p
0−1
3−4
4K / 2160p
0−1
0−1
low / 720p
3−4
14−16
medium / 1080p
2−3
7−8
The average gaming FPS of Radeon HD 8870M in Metro Exodus is 350% more, than GeForce GT 645M.
low / 768p
85−90
95−100
high / 1080p
55−60
90−95
ultra / 1080p
−
80−85
medium / 1080p
−
95−100
The average gaming FPS of Radeon HD 8870M in Minecraft is 31% more, than GeForce GT 645M.
high / 1080p
14−16
16−18
ultra / 1080p
12−14
14−16
low / 720p
24−27
35−40
medium / 1080p
14−16
18−20
The average gaming FPS of Radeon HD 8870M in PLAYERUNKNOWN'S BATTLEGROUNDS is 29% more, than GeForce GT 645M.
ultra / 1080p
3−4
8−9
QHD / 1440p
0−1
0−1
low / 720p
4−5
14−16
medium / 1080p
−
10−12
The average gaming FPS of Radeon HD 8870M in Red Dead Redemption 2 is 175% more, than GeForce GT 645M.
low / 768p
8−9
27−30
medium / 768p
7−8
18−20
high / 1080p
3−4
10−11
ultra / 1080p
3−4
7−8
4K / 2160p
0−1
6−7
The average gaming FPS of Radeon HD 8870M in The Witcher 3: Wild Hunt is 220% more, than GeForce GT 645M.
low / 768p
70−75
85−90
medium / 768p
35−40
45−50
ultra / 1080p
12−14
21−24
high / 768p
30−33
35−40
The average gaming FPS of Radeon HD 8870M in World of Tanks is 26% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
Radeon HD 8870M
Architecture
Kepler
GCN
Code name
N13P-GS
Venus
Type
Laptop
Laptop
Release date
22 March 2012
18 December 2012
Pipelines
384
640
Core clock speed
725 MHz
Boost Clock
775 MHz
Transistor count
1,270 million
1,500 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
22.7 billion/sec
31.00
Floating-point performance
544.5 gflops
992.0 gflops
Memory bus width
128bit
128 Bit
Memory clock speed
1800 MHz
4500 MHz
Memory bandwidth
72 GB/s
Shared memory
-
-
DirectX
12 API
12 (11_1)
Shader Model
5.1
5.1
OpenGL
4.5
4.6
OpenCL
1.1
1.2
Vulkan
1.1.126
1.2.131
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
107 Mh/s
Laptop size
medium sized
large
Optimus
+
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