GeForce GT 640 vs Radeon HD 7770
If you are going to buy a new graphics card and are choosing between GeForce GT 640 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 640 stacks up against Radeon HD 7770, check out specs charts below.
Main Specs
GeForce GT 640
Radeon HD 7770
Power consumption (TDP)
65 Watt
Interface
PCIe 3.0 x16
Supplementary power connectors
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
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GeForce GT 640 and Radeon HD 7770 have maximum RAM of 2 GB.
Both cards are used in Desktops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 7770 - with GCN.
Core clock speed of Radeon HD 7770 is 98 MHz higher, than GeForce GT 640.
GeForce GT 640 and Radeon HD 7770 are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 7770 is 2718 MHz higher, than GeForce GT 640.
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
2−3
10−11
ultra / 1080p
1−2
6−7
QHD / 1440p
0−1
1−2
low / 720p
14−16
24−27
medium / 1080p
5−6
12−14
The average gaming FPS of Radeon HD 7770 in Assassin's Creed Odyssey is 116% more, than GeForce GT 640.
high / 1080p
7−8
16−18
ultra / 1080p
5−6
14−16
QHD / 1440p
0−1
1−2
low / 720p
20−22
35−40
medium / 1080p
7−8
18−20
The average gaming FPS of Radeon HD 7770 in Battlefield 5 is 120% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
35−40
−
QHD / 1440p
0−1
0−1
The average gaming FPS of GeForce GT 640 in Call of Duty: Warzone is 10% more, than Radeon HD 7770.
low / 768p
110−120
170−180
medium / 768p
90−95
140−150
ultra / 1080p
45−50
75−80
QHD / 1440p
24−27
40−45
4K / 2160p
18−20
30−33
high / 768p
65−70
110−120
The average gaming FPS of Radeon HD 7770 in Counter-Strike: Global Offensive is 59% more, than GeForce GT 640.
low / 768p
70−75
55−60
ultra / 1080p
21−24
27−30
medium / 1080p
45−50
45−50
The average gaming FPS of GeForce GT 640 in Cyberpunk 2077 is 6% more, than Radeon HD 7770.
low / 768p
70−75
95−100
medium / 768p
50−55
75−80
ultra / 1080p
27−30
45−50
The average gaming FPS of Radeon HD 7770 in Dota 2 is 45% more, than GeForce GT 640.
high / 1080p
3−4
12−14
ultra / 1080p
3−4
10−12
4K / 2160p
2−3
5−6
low / 720p
14−16
27−30
medium / 1080p
4−5
12−14
The average gaming FPS of Radeon HD 7770 in Far Cry 5 is 180% more, than GeForce GT 640.
high / 1080p
10−12
18−20
ultra / 1080p
5−6
14−16
QHD / 1440p
2−3
−
low / 720p
50−55
80−85
medium / 1080p
16−18
35−40
The average gaming FPS of Radeon HD 7770 in Fortnite is 80% more, than GeForce GT 640.
high / 1080p
6−7
18−20
ultra / 1080p
−
14−16
QHD / 1440p
4−5
5−6
4K / 2160p
2−3
−
low / 720p
21−24
35−40
medium / 1080p
9−10
21−24
The average gaming FPS of Radeon HD 7770 in Forza Horizon 4 is 110% more, than GeForce GT 640.
low / 768p
45−50
65−70
medium / 768p
−
60−65
high / 1080p
7−8
21−24
ultra / 1080p
3−4
9−10
QHD / 1440p
0−1
0−1
medium / 720p
40−45
−
The average gaming FPS of Radeon HD 7770 in Grand Theft Auto V is 73% more, than GeForce GT 640.
high / 1080p
2−3
7−8
ultra / 1080p
0−1
5−6
4K / 2160p
0−1
1−2
low / 720p
8−9
20−22
medium / 1080p
4−5
9−10
The average gaming FPS of Radeon HD 7770 in Metro Exodus is 140% more, than GeForce GT 640.
low / 768p
80−85
100−110
ultra / 1080p
70−75
90−95
medium / 1080p
−
100−105
The average gaming FPS of Radeon HD 7770 in Minecraft is 27% more, than GeForce GT 640.
high / 1080p
−
18−20
ultra / 1080p
12−14
16−18
low / 720p
27−30
45−50
medium / 1080p
14−16
21−24
The average gaming FPS of Radeon HD 7770 in PLAYERUNKNOWN'S BATTLEGROUNDS is 61% more, than GeForce GT 640.
high / 1080p
6−7
12−14
ultra / 1080p
4−5
8−9
QHD / 1440p
0−1
0−1
low / 720p
7−8
20−22
medium / 1080p
−
12−14
The average gaming FPS of Radeon HD 7770 in Red Dead Redemption 2 is 133% more, than GeForce GT 640.
low / 768p
14−16
35−40
medium / 768p
10−11
24−27
high / 1080p
5−6
14−16
ultra / 1080p
4−5
8−9
4K / 2160p
0−1
7−8
The average gaming FPS of Radeon HD 7770 in The Witcher 3: Wild Hunt is 162% more, than GeForce GT 640.
low / 768p
70−75
95−100
medium / 768p
35−40
55−60
ultra / 1080p
16−18
27−30
high / 768p
30−35
45−50
The average gaming FPS of Radeon HD 7770 in World of Tanks is 46% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 7770
Architecture
Kepler
GCN
Code name
GK107
Cape Verde
Type
Desktop
Desktop
Release date
5 June 2012
15 February 2012
Pipelines
384
640
Core clock speed
902 MHz
1000 MHz
Transistor count
1,270 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
Floating-point performance
692.7 gflops
Length
145 mm
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
4500 MHz
Memory bandwidth
28.51 GB/s
Shared memory
-
DirectX
12 (11_0)
DirectX 11.1, Shader 5.1
Shader Model
5.1
OpenGL
4.6
OpenCL
1.2
Vulkan
1.1.126
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
156 Mh/s
Eyefinity
+
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