GeForce GT 640 vs Radeon HD 6990M
Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640 and Radeon HD 6990M. 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 6990M. 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 6990M is a Laptop Graphics Card
Note: Radeon HD 6990M 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 6990M here:
Main Specs
GeForce GT 640
Radeon HD 6990M
Power consumption (TDP)
65 Watt
100 Watt
Interface
PCIe 3.0 x16
MXM-B (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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Radeon HD 6990M has 53% more power consumption, than GeForce GT 640.
GeForce GT 640 is connected by PCIe 3.0 x16, and Radeon HD 6990M uses MXM-B (3.0) interface.
GeForce GT 640 and Radeon HD 6990M have maximum RAM of 2 GB.
GeForce GT 640 is used in Desktops, and Radeon HD 6990M - in Laptops.
GeForce GT 640 is build with Kepler architecture, and Radeon HD 6990M - with Terascale 2.
Core clock speed of GeForce GT 640 is 187 MHz higher, than Radeon HD 6990M.
GeForce GT 640 is manufactured by 28 nm process technology, and Radeon HD 6990M - by 40 nm process technology.
Memory clock speed of GeForce GT 640 is 882 MHz higher, than Radeon HD 6990M.
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
14−16
ultra / 1080p
1−2
8−9
QHD / 1440p
0−1
3−4
low / 720p
14−16
30−33
medium / 1080p
5−6
16−18
The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 200% more, than GeForce GT 640.
high / 1080p
7−8
21−24
ultra / 1080p
5−6
18−20
QHD / 1440p
0−1
6−7
4K / 2160p
−
5−6
low / 720p
20−22
45−50
medium / 1080p
7−8
24−27
The average gaming FPS of Radeon HD 6990M in Battlefield 5 is 180% 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 6990M.
low / 768p
110−120
200−210
medium / 768p
90−95
170−180
ultra / 1080p
45−50
90−95
QHD / 1440p
24−27
50−55
4K / 2160p
18−20
30−33
high / 768p
65−70
130−140
The average gaming FPS of Radeon HD 6990M in Counter-Strike: Global Offensive is 88% more, than GeForce GT 640.
low / 768p
70−75
55−60
ultra / 1080p
21−24
35−40
medium / 1080p
45−50
45−50
GeForce GT 640 and Radeon HD 6990M have the same average FPS in Cyberpunk 2077.
low / 768p
70−75
100−110
medium / 768p
50−55
90−95
ultra / 1080p
27−30
60−65
The average gaming FPS of Radeon HD 6990M in Dota 2 is 68% more, than GeForce GT 640.
high / 1080p
3−4
16−18
ultra / 1080p
3−4
14−16
4K / 2160p
2−3
6−7
low / 720p
14−16
35−40
medium / 1080p
4−5
18−20
The average gaming FPS of Radeon HD 6990M in Far Cry 5 is 280% more, than GeForce GT 640.
high / 1080p
10−12
24−27
ultra / 1080p
5−6
18−20
QHD / 1440p
2−3
16−18
low / 720p
50−55
95−100
medium / 1080p
16−18
50−55
The average gaming FPS of Radeon HD 6990M in Fortnite is 147% more, than GeForce GT 640.
high / 1080p
6−7
24−27
ultra / 1080p
−
18−20
QHD / 1440p
4−5
8−9
4K / 2160p
2−3
−
low / 720p
21−24
50−55
medium / 1080p
9−10
27−30
The average gaming FPS of Radeon HD 6990M in Forza Horizon 4 is 180% more, than GeForce GT 640.
low / 768p
45−50
80−85
medium / 768p
−
70−75
high / 1080p
7−8
27−30
ultra / 1080p
3−4
10−12
QHD / 1440p
0−1
2−3
medium / 720p
40−45
−
The average gaming FPS of Radeon HD 6990M in Grand Theft Auto V is 110% more, than GeForce GT 640.
high / 1080p
2−3
9−10
ultra / 1080p
0−1
7−8
4K / 2160p
0−1
2−3
low / 720p
8−9
27−30
medium / 1080p
4−5
12−14
The average gaming FPS of Radeon HD 6990M in Metro Exodus is 240% more, than GeForce GT 640.
low / 768p
80−85
110−120
ultra / 1080p
70−75
100−110
medium / 1080p
−
100−110
The average gaming FPS of Radeon HD 6990M in Minecraft is 42% more, than GeForce GT 640.
high / 1080p
−
21−24
ultra / 1080p
12−14
16−18
low / 720p
27−30
55−60
medium / 1080p
14−16
24−27
The average gaming FPS of Radeon HD 6990M in PLAYERUNKNOWN'S BATTLEGROUNDS is 83% more, than GeForce GT 640.
high / 1080p
6−7
14−16
ultra / 1080p
4−5
9−10
QHD / 1440p
0−1
0−1
low / 720p
7−8
27−30
medium / 1080p
−
16−18
The average gaming FPS of Radeon HD 6990M in Red Dead Redemption 2 is 183% more, than GeForce GT 640.
low / 768p
14−16
50−55
medium / 768p
10−11
30−35
high / 1080p
5−6
18−20
ultra / 1080p
4−5
10−11
4K / 2160p
0−1
8−9
The average gaming FPS of Radeon HD 6990M in The Witcher 3: Wild Hunt is 250% more, than GeForce GT 640.
low / 768p
70−75
100−105
medium / 768p
35−40
60−65
ultra / 1080p
16−18
30−35
high / 768p
30−35
50−55
The average gaming FPS of Radeon HD 6990M in World of Tanks is 58% more, than GeForce GT 640.
Full Specs
GeForce GT 640
Radeon HD 6990M
Architecture
Kepler
Terascale 2
Code name
GK107
Blackcomb XTX
Type
Desktop
Laptop
Release date
5 June 2012
12 July 2011
Pipelines
384
1120
Core clock speed
902 MHz
715 MHz
Transistor count
1,270 million
1,700 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
28.86
40.04
Floating-point performance
692.7 gflops
1,601.6 gflops
Length
145 mm
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
900 MHz
Memory bandwidth
28.51 GB/s
115.2 GB/s
Shared memory
-
DirectX
12 (11_0)
11.2 (11_0)
Shader Model
5.1
5.0
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.1.126
N/A
CUDA
3.0
Bitcoin / BTC (SHA256)
24 Mh/s
Laptop size
large
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