GeForce GT 640M vs Radeon HD 6990
In this comparison between GeForce GT 640M and Radeon HD 6990 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 640M will be the best choice, for others Radeon HD 6990 will be their preference. Study the comparison tables below and make your choice.
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 6990
Power consumption (TDP)
32 Watt
375 Watt
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 8-pin
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Display Connectors
No outputs
1x DVI, 4x mini-DisplayPort
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Radeon HD 6990 has 1071% more power consumption, than GeForce GT 640M.
GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 6990 uses PCIe 2.0 x16 interface.
GeForce GT 640M and Radeon HD 6990 have maximum RAM of 2 GB.
GeForce GT 640M is used in Laptops, and Radeon HD 6990 - in Desktops.
GeForce GT 640M is build with Kepler architecture, and Radeon HD 6990 - with TeraScale 3.
GeForce GT 640M is manufactured by 28 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
Memory clock speed of Radeon HD 6990 is 3200 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
14−16
ultra / 1080p
0−1
9−10
QHD / 1440p
0−1
3−4
low / 720p
10−12
30−35
medium / 1080p
2−3
18−20
The average gaming FPS of Radeon HD 6990 in Assassin's Creed Odyssey is 316% more, than GeForce GT 640M.
high / 1080p
−
24−27
ultra / 1080p
3−4
21−24
QHD / 1440p
0−1
7−8
4K / 2160p
−
5−6
low / 720p
12−14
50−55
medium / 1080p
4−5
27−30
The average gaming FPS of Radeon HD 6990 in Battlefield 5 is 385% 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 6990.
low / 768p
110−120
210−220
medium / 768p
85−90
170−180
ultra / 1080p
35−40
95−100
QHD / 1440p
−
50−55
4K / 2160p
10−11
30−33
high / 768p
55−60
140−150
The average gaming FPS of Radeon HD 6990 in Counter-Strike: Global Offensive is 116% more, than GeForce GT 640M.
low / 768p
70−75
55−60
ultra / 1080p
12−14
40−45
medium / 1080p
45−50
45−50
The average gaming FPS of Radeon HD 6990 in Cyberpunk 2077 is 11% more, than GeForce GT 640M.
low / 768p
70−75
110−120
medium / 768p
40−45
90−95
ultra / 1080p
18−20
60−65
The average gaming FPS of Radeon HD 6990 in Dota 2 is 104% more, than GeForce GT 640M.
high / 1080p
2−3
18−20
ultra / 1080p
2−3
16−18
4K / 2160p
0−1
6−7
low / 720p
9−10
35−40
medium / 1080p
3−4
18−20
The average gaming FPS of Radeon HD 6990 in Far Cry 5 is 475% more, than GeForce GT 640M.
high / 1080p
−
24−27
ultra / 1080p
5−6
18−20
QHD / 1440p
1−2
16−18
low / 720p
45−50
95−100
medium / 1080p
7−8
50−55
The average gaming FPS of Radeon HD 6990 in Fortnite is 206% more, than GeForce GT 640M.
high / 1080p
2−3
24−27
ultra / 1080p
−
20−22
QHD / 1440p
0−1
9−10
low / 720p
14−16
50−55
medium / 1080p
5−6
27−30
The average gaming FPS of Radeon HD 6990 in Forza Horizon 4 is 400% more, than GeForce GT 640M.
low / 768p
40−45
85−90
medium / 768p
−
75−80
high / 1080p
3−4
30−33
ultra / 1080p
2−3
12−14
QHD / 1440p
0−1
3−4
medium / 720p
30−35
−
The average gaming FPS of Radeon HD 6990 in Grand Theft Auto V is 175% more, than GeForce GT 640M.
high / 1080p
1−2
9−10
ultra / 1080p
0−1
7−8
4K / 2160p
0−1
2−3
low / 720p
2−3
27−30
medium / 1080p
2−3
12−14
The average gaming FPS of Radeon HD 6990 in Metro Exodus is 750% more, than GeForce GT 640M.
low / 768p
85−90
110−120
high / 1080p
55−60
−
ultra / 1080p
−
100−110
medium / 1080p
−
100−110
The average gaming FPS of Radeon HD 6990 in Minecraft is 32% more, than GeForce GT 640M.
high / 1080p
14−16
21−24
ultra / 1080p
12−14
18−20
low / 720p
24−27
55−60
medium / 1080p
14−16
24−27
The average gaming FPS of Radeon HD 6990 in PLAYERUNKNOWN'S BATTLEGROUNDS is 82% more, than GeForce GT 640M.
high / 1080p
−
14−16
ultra / 1080p
3−4
9−10
QHD / 1440p
0−1
0−1
low / 720p
3−4
27−30
medium / 1080p
−
16−18
The average gaming FPS of Radeon HD 6990 in Red Dead Redemption 2 is 533% more, than GeForce GT 640M.
low / 768p
7−8
55−60
medium / 768p
6−7
30−35
high / 1080p
3−4
18−20
ultra / 1080p
−
10−12
4K / 2160p
0−1
8−9
The average gaming FPS of Radeon HD 6990 in The Witcher 3: Wild Hunt is 620% more, than GeForce GT 640M.
low / 768p
70−75
100−110
medium / 768p
35−40
60−65
ultra / 1080p
12−14
35−40
high / 768p
27−30
50−55
The average gaming FPS of Radeon HD 6990 in World of Tanks is 72% more, than GeForce GT 640M.
Full Specs
GeForce GT 640M
Radeon HD 6990
Architecture
Kepler
TeraScale 3
Code name
N13P-GS
Antilles
Type
Laptop
Desktop
Release date
22 March 2012
8 March 2011
Pipelines
384
1536
Core clock speed
830 MHz
Boost Clock
645 MHz
Transistor count
1,270 million
2,640 million
Manufacturing process technology
28 nm
40 nm
Texture fill rate
79.68
Floating-point performance
480.0 gflops
2x 2,549.8 gflops
Length
295 mm
Memory bus width
128bit
256 Bit
Memory clock speed
1800 - 4000 MHz
5000 MHz
Memory bandwidth
160.0 GB/s
Shared memory
-
DirectX
12 API
11.2 (11_0)
Shader Model
5.1
5.0
OpenGL
4.5
4.4
OpenCL
1.1
1.2
Vulkan
1.1.126
N/A
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
265 Mh/s
Laptop size
medium sized
Optimus
+
Ethereum / ETH (DaggerHashimoto)
24 Mh/s
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