GeForce GT 640 vs Radeon HD 8790M
Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640 and Radeon HD 8790M. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640 and Radeon HD 8790M. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
Radeon HD 8790M is a Laptop Graphics Card
Note: Radeon HD 8790M 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 Radeon HD 8790M here:
Main Specs
GeForce GT 640
Radeon HD 8790M
Power consumption (TDP)
65 Watt
Interface
PCIe 3.0 x16
MXM-A (3.0)
Supplementary power connectors
None
None
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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GeForce GT 640 is connected by PCIe 3.0 x16, and Radeon HD 8790M uses MXM-A (3.0) interface.
GeForce GT 640 and Radeon HD 8790M have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and Radeon HD 8790M - in Laptops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 8790M - with GCN.
Core clock speed of GeForce GT 640 is 52 MHz higher, than Radeon HD 8790M.
GeForce GT 640 and Radeon HD 8790M are manufactured by 28 nm process technology.
Memory clock speed of Radeon HD 8790M 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
3−4
ultra / 1080p
1−2
1−2
QHD / 1440p
0−1
0−1
low / 720p
14−16
14−16
medium / 1080p
5−6
6−7
GeForce GT 640 and Radeon HD 8790M have the same average FPS in Assassin's Creed Odyssey.
high / 1080p
7−8
8−9
ultra / 1080p
5−6
6−7
QHD / 1440p
0−1
0−1
low / 720p
20−22
21−24
medium / 1080p
7−8
9−10
The average gaming FPS of Radeon HD 8790M in Battlefield 5 is 10% more, than GeForce GT 640.
low / 768p
50−55
45−50
high / 1080p
35−40
40−45
QHD / 1440p
0−1
0−1
GeForce GT 640 and Radeon HD 8790M have the same average FPS in Call of Duty: Warzone.
low / 768p
110−120
120−130
medium / 768p
90−95
100−110
ultra / 1080p
45−50
50−55
QHD / 1440p
24−27
24−27
4K / 2160p
18−20
−
high / 768p
65−70
75−80
The average gaming FPS of Radeon HD 8790M in Counter-Strike: Global Offensive is 11% more, than GeForce GT 640.
low / 768p
70−75
70−75
ultra / 1080p
21−24
21−24
medium / 1080p
45−50
40−45
The average gaming FPS of GeForce GT 640 in Cyberpunk 2077 is 4% more, than Radeon HD 8790M.
low / 768p
70−75
75−80
medium / 768p
50−55
55−60
ultra / 1080p
27−30
30−35
The average gaming FPS of Radeon HD 8790M in Dota 2 is 7% more, than GeForce GT 640.
high / 1080p
3−4
4−5
ultra / 1080p
3−4
4−5
4K / 2160p
2−3
1−2
low / 720p
14−16
14−16
medium / 1080p
4−5
6−7
The average gaming FPS of Radeon HD 8790M in Far Cry 5 is 20% more, than GeForce GT 640.
high / 1080p
10−12
12−14
ultra / 1080p
5−6
7−8
QHD / 1440p
2−3
4−5
low / 720p
50−55
60−65
medium / 1080p
16−18
18−20
The average gaming FPS of Radeon HD 8790M in Fortnite is 23% more, than GeForce GT 640.
high / 1080p
6−7
8−9
ultra / 1080p
−
7−8
QHD / 1440p
4−5
0−1
4K / 2160p
2−3
−
low / 720p
21−24
21−24
medium / 1080p
9−10
10−11
The average gaming FPS of Radeon HD 8790M in Forza Horizon 4 is 8% more, than GeForce GT 640.
low / 768p
45−50
50−55
high / 1080p
7−8
10−11
ultra / 1080p
3−4
4−5
QHD / 1440p
0−1
0−1
medium / 720p
40−45
40−45
The average gaming FPS of Radeon HD 8790M in Grand Theft Auto V is 8% more, than GeForce GT 640.
high / 1080p
2−3
2−3
ultra / 1080p
0−1
0−1
4K / 2160p
0−1
0−1
low / 720p
8−9
9−10
medium / 1080p
4−5
4−5
GeForce GT 640 and Radeon HD 8790M have the same average FPS in Metro Exodus.
low / 768p
80−85
85−90
high / 1080p
−
70−75
ultra / 1080p
70−75
−
The average gaming FPS of Radeon HD 8790M in Minecraft is 6% more, than GeForce GT 640.
ultra / 1080p
12−14
12−14
low / 720p
27−30
30−35
medium / 1080p
14−16
14−16
The average gaming FPS of Radeon HD 8790M in PLAYERUNKNOWN'S BATTLEGROUNDS is 11% more, than GeForce GT 640.
high / 1080p
6−7
7−8
ultra / 1080p
4−5
4−5
QHD / 1440p
0−1
0−1
low / 720p
7−8
8−9
medium / 1080p
−
8−9
GeForce GT 640 and Radeon HD 8790M have the same average FPS in Red Dead Redemption 2.
low / 768p
14−16
20−22
medium / 768p
10−11
12−14
high / 1080p
5−6
7−8
ultra / 1080p
4−5
5−6
4K / 2160p
0−1
1−2
The average gaming FPS of Radeon HD 8790M in The Witcher 3: Wild Hunt is 37% more, than GeForce GT 640.
low / 768p
70−75
75−80
medium / 768p
35−40
40−45
ultra / 1080p
16−18
18−20
high / 768p
30−35
30−35
The average gaming FPS of Radeon HD 8790M in World of Tanks is 7% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 8790M
Architecture
Kepler
GCN
Code name
GK107
Mars XTX
Type
Desktop
Laptop
Release date
5 June 2012
16 November 2012
Pipelines
384
384
Core clock speed
902 MHz
850 MHz
Boost Clock
900 MHz
Transistor count
1,270 million
950 million
Manufacturing process technology
28 nm
28 nm
Texture fill rate
28.86
21.60
Floating-point performance
692.7 gflops
691.2 gflops
Length
145 mm
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
4500 MHz
Memory bandwidth
28.51 GB/s
64 GB/s
Shared memory
-
DirectX
12 (11_0)
12 (11_1)
Shader Model
5.1
5.1
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.1.126
1.2.131
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
80 Mh/s
Laptop size
medium sized
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