GeForce GT 645M vs Radeon HD 6790
When comparing GeForce GT 645M and Radeon HD 6790, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 645M and Radeon HD 6790 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce GT 645M is a Laptop Graphics Card
Note: GeForce GT 645M is only used in laptop graphics. It has 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 here:
Main Specs
GeForce GT 645M
Radeon HD 6790
Power consumption (TDP)
32 Watt
150 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 1x DisplayPort
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Radeon HD 6790 has 368% more power consumption, than GeForce GT 645M.
GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon HD 6790 uses PCIe 2.0 x16 interface.
GeForce GT 645M has 1 GB more memory, than Radeon HD 6790.
GeForce GT 645M is used in Laptops, and Radeon HD 6790 - in Desktops.
GeForce GT 645M is build with Kepler architecture, and Radeon HD 6790 - with Terascale 2.
GeForce GT 645M is manufactured by 28 nm process technology, and Radeon HD 6790 - by 40 nm process technology.
Memory clock speed of GeForce GT 645M is 750 MHz higher, than Radeon HD 6790.
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 6790 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 6790 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 6790.
low / 768p
110−120
140−150
medium / 768p
85−90
120−130
ultra / 1080p
35−40
60−65
QHD / 1440p
−
30−35
4K / 2160p
10−11
27−30
high / 768p
60−65
90−95
The average gaming FPS of Radeon HD 6790 in Counter-Strike: Global Offensive is 45% 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 6790.
low / 768p
70−75
85−90
medium / 768p
45−50
65−70
ultra / 1080p
18−20
35−40
The average gaming FPS of Radeon HD 6790 in Dota 2 is 39% 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 6790 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
27−30
The average gaming FPS of Radeon HD 6790 in Fortnite is 75% more, than GeForce GT 645M.
high / 1080p
3−4
14−16
ultra / 1080p
−
12−14
QHD / 1440p
0−1
2−3
low / 720p
14−16
27−30
medium / 1080p
6−7
16−18
The average gaming FPS of Radeon HD 6790 in Forza Horizon 4 is 150% more, than GeForce GT 645M.
low / 768p
40−45
55−60
medium / 768p
−
50−55
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 6790 in Grand Theft Auto V is 62% more, than GeForce GT 645M.
high / 1080p
1−2
5−6
ultra / 1080p
0−1
4−5
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 6790 in Metro Exodus is 350% more, than GeForce GT 645M.
low / 768p
85−90
95−100
high / 1080p
55−60
90−95
ultra / 1080p
−
85−90
medium / 1080p
−
95−100
The average gaming FPS of Radeon HD 6790 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 6790 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 6790 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 6790 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
40−45
The average gaming FPS of Radeon HD 6790 in World of Tanks is 31% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
Radeon HD 6790
Architecture
Kepler
Terascale 2
Code name
N13P-GS
Barts
Type
Laptop
Desktop
Release date
22 March 2012
4 April 2011
Pipelines
384
800
Core clock speed
840 MHz
Transistor count
1,270 million
1,700 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
22.7 billion/sec
33.60
Floating-point performance
544.5 gflops
1,344.0 gflops
Length
198 mm
Memory bus width
128bit
256 Bit
Memory clock speed
1800 MHz
1050 MHz
Memory bandwidth
134.4 GB/s
Shared memory
-
DirectX
12 API
11.2 (11_0)
Shader Model
5.1
5.0
OpenGL
4.5
4.4
OpenCL
1.1
1.2
Vulkan
1.1.126
N/A
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
122 Mh/s
Laptop size
medium sized
Optimus
+
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