GeForce GT 640M vs Radeon HD 7770
If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Radeon HD 7770, 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 640M stacks up against Radeon HD 7770, check out specs charts below.
GeForce GT 640M is a Laptop Graphics Card
Note: GeForce GT 640M 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 640M here:
Main Specs
GeForce GT 640M
Radeon HD 7770
Power consumption (TDP)
32 Watt
Interface
PCIe 3.0 x16
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
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GeForce GT 640M and Radeon HD 7770 have maximum RAM of 2 GB.
GeForce GT 640M is used in Laptops, and Radeon HD 7770 - in Desktops.
GeForce GT 640M is build with Kepler architecture, and Radeon HD 7770 - with GCN.
GeForce GT 640M and Radeon HD 7770 are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7770 is 2700 MHz higher, than GeForce GT 640M.
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
0−1
10−11
ultra / 1080p
0−1
6−7
QHD / 1440p
0−1
1−2
low / 720p
10−12
24−27
medium / 1080p
2−3
12−14
The average gaming FPS of Radeon HD 7770 in Assassin's Creed Odyssey is 216% more, than GeForce GT 640M.
high / 1080p
−
16−18
ultra / 1080p
3−4
14−16
QHD / 1440p
0−1
1−2
low / 720p
12−14
35−40
medium / 1080p
4−5
18−20
The average gaming FPS of Radeon HD 7770 in Battlefield 5 is 228% more, than GeForce GT 640M.
low / 768p
50−55
45−50
high / 1080p
45−50
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640M in Call of Duty: Warzone is 10% more, than Radeon HD 7770.
low / 768p
110−120
170−180
medium / 768p
85−90
140−150
ultra / 1080p
35−40
75−80
QHD / 1440p
−
40−45
4K / 2160p
10−11
30−33
high / 768p
55−60
110−120
The average gaming FPS of Radeon HD 7770 in Counter-Strike: Global Offensive is 77% more, than GeForce GT 640M.
low / 768p
70−75
55−60
ultra / 1080p
12−14
27−30
medium / 1080p
45−50
45−50
GeForce GT 640M and Radeon HD 7770 have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
95−100
medium / 768p
40−45
75−80
ultra / 1080p
18−20
45−50
The average gaming FPS of Radeon HD 7770 in Dota 2 is 68% more, than GeForce GT 640M.
high / 1080p
2−3
12−14
ultra / 1080p
2−3
10−12
4K / 2160p
0−1
5−6
low / 720p
9−10
27−30
medium / 1080p
3−4
12−14
The average gaming FPS of Radeon HD 7770 in Far Cry 5 is 300% more, than GeForce GT 640M.
high / 1080p
−
18−20
ultra / 1080p
5−6
14−16
QHD / 1440p
1−2
−
low / 720p
45−50
80−85
medium / 1080p
7−8
35−40
The average gaming FPS of Radeon HD 7770 in Fortnite is 125% more, than GeForce GT 640M.
high / 1080p
2−3
18−20
ultra / 1080p
−
14−16
QHD / 1440p
0−1
5−6
low / 720p
14−16
35−40
medium / 1080p
5−6
21−24
The average gaming FPS of Radeon HD 7770 in Forza Horizon 4 is 271% more, than GeForce GT 640M.
low / 768p
40−45
65−70
medium / 768p
−
60−65
high / 1080p
3−4
21−24
ultra / 1080p
2−3
9−10
QHD / 1440p
0−1
0−1
medium / 720p
30−35
−
The average gaming FPS of Radeon HD 7770 in Grand Theft Auto V is 106% more, than GeForce GT 640M.
high / 1080p
1−2
7−8
ultra / 1080p
0−1
5−6
4K / 2160p
0−1
1−2
low / 720p
2−3
20−22
medium / 1080p
2−3
9−10
The average gaming FPS of Radeon HD 7770 in Metro Exodus is 500% more, than GeForce GT 640M.
low / 768p
85−90
100−110
high / 1080p
55−60
−
ultra / 1080p
−
90−95
medium / 1080p
−
100−105
The average gaming FPS of Radeon HD 7770 in Minecraft is 20% more, than GeForce GT 640M.
high / 1080p
14−16
18−20
ultra / 1080p
12−14
16−18
low / 720p
24−27
45−50
medium / 1080p
14−16
21−24
The average gaming FPS of Radeon HD 7770 in PLAYERUNKNOWN'S BATTLEGROUNDS is 52% more, than GeForce GT 640M.
high / 1080p
−
12−14
ultra / 1080p
3−4
8−9
QHD / 1440p
0−1
0−1
low / 720p
3−4
20−22
medium / 1080p
−
12−14
The average gaming FPS of Radeon HD 7770 in Red Dead Redemption 2 is 366% more, than GeForce GT 640M.
low / 768p
7−8
35−40
medium / 768p
6−7
24−27
high / 1080p
3−4
14−16
ultra / 1080p
−
8−9
4K / 2160p
0−1
7−8
The average gaming FPS of Radeon HD 7770 in The Witcher 3: Wild Hunt is 420% more, than GeForce GT 640M.
low / 768p
70−75
95−100
medium / 768p
35−40
55−60
ultra / 1080p
12−14
27−30
high / 768p
27−30
45−50
The average gaming FPS of Radeon HD 7770 in World of Tanks is 54% more, than GeForce GT 640M.
Full Specs
GeForce GT 640M
Radeon HD 7770
Architecture
Kepler
GCN
Code name
N13P-GS
Cape Verde
Type
Laptop
Desktop
Release date
22 March 2012
15 February 2012
Pipelines
384
640
Core clock speed
1000 MHz
Boost Clock
645 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
28 nm
Floating-point performance
480.0 gflops
Memory bus width
128bit
128 Bit
Memory clock speed
1800 - 4000 MHz
4500 MHz
Shared memory
-
-
DirectX
12 API
DirectX 11.1, Shader 5.1
Shader Model
5.1
OpenGL
4.5
OpenCL
1.1
Vulkan
1.1.126
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)
18 Mh/s
156 Mh/s
Laptop size
medium sized
Optimus
+
Eyefinity
+
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