GeForce GT 645M vs Radeon HD 6770
In this comparison between GeForce GT 645M and Radeon HD 6770 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 Radeon HD 6770 will be their preference. Study the comparison tables below and make your choice.
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 6770
Power consumption (TDP)
32 Watt
108 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Display Connectors
No outputs
2x DVI, 1x HDMI, 2x mini-DisplayPort
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Radeon HD 6770 has 237% more power consumption, than GeForce GT 645M.
GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon HD 6770 uses PCIe 2.0 x16 interface.
GeForce GT 645M has 1 GB more memory, than Radeon HD 6770.
GeForce GT 645M is used in Laptops, and Radeon HD 6770 - in Desktops.
GeForce GT 645M is build with Kepler architecture, and Radeon HD 6770 - with TeraScale 2.
GeForce GT 645M is manufactured by 28 nm process technology, and Radeon HD 6770 - by 40 nm process technology.
Memory clock speed of GeForce GT 645M is 750 MHz higher, than Radeon HD 6770.
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
3−4
ultra / 1080p
0−1
1−2
QHD / 1440p
0−1
0−1
low / 720p
12−14
14−16
medium / 1080p
2−3
5−6
The average gaming FPS of Radeon HD 6770 in Assassin's Creed Odyssey is 60% more, than GeForce GT 645M.
high / 1080p
−
7−8
ultra / 1080p
3−4
6−7
QHD / 1440p
0−1
0−1
low / 720p
12−14
20−22
medium / 1080p
4−5
8−9
The average gaming FPS of Radeon HD 6770 in Battlefield 5 is 71% more, than GeForce GT 645M.
low / 768p
50−55
45−50
high / 1080p
45−50
40−45
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 645M in Call of Duty: Warzone is 11% more, than Radeon HD 6770.
low / 768p
110−120
120−130
medium / 768p
85−90
95−100
ultra / 1080p
35−40
45−50
QHD / 1440p
−
24−27
4K / 2160p
10−11
−
high / 768p
60−65
70−75
The average gaming FPS of Radeon HD 6770 in Counter-Strike: Global Offensive is 13% more, than GeForce GT 645M.
low / 768p
70−75
70−75
ultra / 1080p
14−16
20−22
medium / 1080p
45−50
40−45
GeForce GT 645M and Radeon HD 6770 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
75−80
medium / 768p
45−50
55−60
ultra / 1080p
18−20
27−30
The average gaming FPS of Radeon HD 6770 in Dota 2 is 17% more, than GeForce GT 645M.
high / 1080p
2−3
4−5
ultra / 1080p
2−3
3−4
4K / 2160p
0−1
1−2
low / 720p
10−11
14−16
medium / 1080p
3−4
5−6
The average gaming FPS of Radeon HD 6770 in Far Cry 5 is 75% more, than GeForce GT 645M.
high / 1080p
−
12−14
ultra / 1080p
5−6
7−8
QHD / 1440p
1−2
4−5
low / 720p
45−50
55−60
medium / 1080p
8−9
16−18
The average gaming FPS of Radeon HD 6770 in Fortnite is 40% more, than GeForce GT 645M.
high / 1080p
3−4
7−8
ultra / 1080p
−
6−7
QHD / 1440p
0−1
0−1
low / 720p
14−16
21−24
medium / 1080p
6−7
9−10
The average gaming FPS of Radeon HD 6770 in Forza Horizon 4 is 62% more, than GeForce GT 645M.
low / 768p
40−45
45−50
high / 1080p
3−4
9−10
ultra / 1080p
2−3
4−5
QHD / 1440p
0−1
0−1
medium / 720p
35−40
40−45
The average gaming FPS of Radeon HD 6770 in Grand Theft Auto V is 23% more, than GeForce GT 645M.
high / 1080p
1−2
2−3
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
3−4
8−9
medium / 1080p
2−3
4−5
The average gaming FPS of Radeon HD 6770 in Metro Exodus is 150% more, than GeForce GT 645M.
low / 768p
85−90
85−90
high / 1080p
55−60
65−70
The average gaming FPS of Radeon HD 6770 in Minecraft is 6% more, than GeForce GT 645M.
high / 1080p
14−16
−
ultra / 1080p
12−14
12−14
low / 720p
24−27
27−30
medium / 1080p
14−16
14−16
The average gaming FPS of Radeon HD 6770 in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GT 645M.
high / 1080p
−
6−7
ultra / 1080p
3−4
4−5
QHD / 1440p
0−1
0−1
low / 720p
4−5
7−8
The average gaming FPS of Radeon HD 6770 in Red Dead Redemption 2 is 50% more, than GeForce GT 645M.
low / 768p
8−9
18−20
medium / 768p
7−8
12−14
high / 1080p
3−4
6−7
ultra / 1080p
3−4
4−5
4K / 2160p
0−1
1−2
The average gaming FPS of Radeon HD 6770 in The Witcher 3: Wild Hunt is 100% more, than GeForce GT 645M.
low / 768p
70−75
70−75
medium / 768p
35−40
35−40
ultra / 1080p
12−14
16−18
high / 768p
30−33
30−35
The average gaming FPS of Radeon HD 6770 in World of Tanks is 2% more, than GeForce GT 645M.
Full Specs
GeForce GT 645M
Radeon HD 6770
Architecture
Kepler
TeraScale 2
Code name
N13P-GS
Juniper
Type
Laptop
Desktop
Release date
22 March 2012
21 January 2011
Pipelines
384
800
Boost Clock
900 MHz
Transistor count
1,270 million
1,040 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
22.7 billion/sec
34.00
Floating-point performance
544.5 gflops
1,360.0 gflops
Length
198 mm
Memory bus width
128bit
128 Bit
Memory clock speed
1800 MHz
1050 MHz
Memory bandwidth
76.8 GB/s
Shared memory
-
DirectX
12 API
Shader Model
5.1
5.0
OpenGL
4.5
4.4
OpenCL
1.1
1.2
Vulkan
1.1.126
CUDA
+
CUDA cores
384
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 2.0 x16
HDMI
+
+
HDCP
+
Maximum VGA resolution
Up to 2048x1536
3D Blu-Ray
+
Bitcoin / BTC (SHA256)
19 Mh/s
118 Mh/s
Laptop size
medium sized
Optimus
+
Eyefinity
+
Design
reference
CrossFire
+
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