AMD Radeon RX 6600 XT vs NVIDIA GeForce GT 640M

#ad
Buy
VS

Combined performance score

GT 640M
2.38

Radeon RX 6600 XT outperforms GeForce GT 640M by 1685% in our combined benchmark results.

General info

GPU architecture, market segment, value for money and other general parameters compared.

Place in performance ranking80278
Place by popularitynot in top-10056
Value for money0.2246.75
ArchitectureKepler (2012−2018)Navi / RDNA2 (2020−2022)
GPU code nameN13P-GSNavi 23
Market segmentLaptopDesktop
Release date22 March 2012 (12 years old)30 July 2021 (2 years old)
Launch price (MSRP)no data$379
Current price$310 $283 (0.7x MSRP)
Value for money

Performance to price ratio. The higher, the better.

RX 6600 XT has 21150% better value for money than GT 640M.

Technical specs

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores3842048
CUDA cores384no data
Core clock speedUp to 625 MHz1968 MHz
Boost clock speed645 MHz2589 MHz
Number of transistors1,270 million11,060 million
Manufacturing process technology28 nm7 nm
Power consumption (TDP)32 Watt160 (TGP) Watt
Texture fill rateUp to 20.0 billion/sec331.4
Floating-point performance480.0 gflopsno data

Size and compatibility

Information on GeForce GT 640M and Radeon RX 6600 XT compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Laptop sizemedium sizedno data
Bus supportPCI Express 2.0, PCI Express 3.0no data
InterfacePCIe 3.0 x16PCIe 4.0 x8
Lengthno data190 mm
Widthno data2-slot
Supplementary power connectorsno data1x 8-pin

Memory

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeDDR3\GDDR5GDDR6
Maximum RAM amount2 GB8 GB
Memory bus width128bit128 Bit
Memory clock speed1800 - 4000 MHz16000 MHz
Memory bandwidthUp to 64.0 GB/s256.0 GB/s
Shared memory--

Video outputs and ports

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsNo outputs1x HDMI, 2x DisplayPort
HDMI++
HDCP+no data
Maximum VGA resolutionUp to 2048x1536no data

Technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray+no data
Optimus+no data

API support

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX12 API12.0 Ultimate (12_2)
Shader Model5.16.5
OpenGL4.54.6
OpenCL1.12.1
Vulkan1.1.1261.2
CUDA+no data

Synthetic benchmark performance

Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.


Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GT 640M 2.38
RX 6600 XT 42.48
+1685%

Radeon RX 6600 XT outperforms GeForce GT 640M by 1685% in our combined benchmark results.


Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

Benchmark coverage: 25%

GT 640M 923
RX 6600 XT 16465
+1684%

Radeon RX 6600 XT outperforms GeForce GT 640M by 1684% in Passmark.

3DMark Vantage Performance

3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.

Benchmark coverage: 17%

GT 640M 7425
RX 6600 XT 88163
+1087%

Radeon RX 6600 XT outperforms GeForce GT 640M by 1087% in 3DMark Vantage Performance.

3DMark 11 Performance GPU

3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.

Benchmark coverage: 17%

GT 640M 1728
RX 6600 XT 39051
+2160%

Radeon RX 6600 XT outperforms GeForce GT 640M by 2160% in 3DMark 11 Performance GPU.

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

Benchmark coverage: 14%

GT 640M 1225
RX 6600 XT 28342
+2214%

Radeon RX 6600 XT outperforms GeForce GT 640M by 2214% in 3DMark Fire Strike Graphics.

3DMark Cloud Gate GPU

Cloud Gate is an outdated DirectX 11 feature level 10 benchmark that was used for home PCs and basic notebooks. It displays a few scenes of some weird space teleportation device launching spaceships into unknown, using fixed resolution of 1280x720. Just like Ice Storm benchmark, it has been discontinued in January 2020 and replaced by 3DMark Night Raid.

Benchmark coverage: 14%

GT 640M 9024
RX 6600 XT 156297
+1632%

Radeon RX 6600 XT outperforms GeForce GT 640M by 1632% in 3DMark Cloud Gate GPU.

3DMark Ice Storm GPU

Ice Storm Graphics is an obsolete benchmark, part of 3DMark suite. Ice Storm was used to measure entry level laptops and Windows-based tablets performance. It utilizes DirectX 11 feature level 9 to display a battle between two space fleets near a frozen planet in 1280x720 resolution. Discontinued in January 2020, it is now superseded by 3DMark Night Raid.

Benchmark coverage: 8%

GT 640M 80836
RX 6600 XT 472371
+484%

Radeon RX 6600 XT outperforms GeForce GT 640M by 484% in 3DMark Ice Storm GPU.

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

900p24
−1567%
400−450
+1567%
Full HD22
−500%
132
+500%
1200p19
−1479%
300−350
+1479%
1440p4−5
−1750%
74
+1750%
4K2−3
−1950%
41
+1950%

Performance in popular games

Full HD
Low Preset

Cyberpunk 2077 5−6
−1480%
79
+1480%

Full HD
Medium Preset

Assassin's Creed Odyssey 3−4
−2367%
70−75
+2367%
Battlefield 5 4−5
−2900%
120−130
+2900%
Call of Duty: Modern Warfare 10−12
−955%
110−120
+955%
Cyberpunk 2077 5−6
−1460%
78
+1460%
Far Cry 5 3−4
−4933%
151
+4933%
Far Cry New Dawn 2−3
−6450%
131
+6450%
Forza Horizon 4 5−6
−2460%
120−130
+2460%
Hitman 3 4−5
−5425%
221
+5425%
Horizon Zero Dawn 4−5
−3325%
137
+3325%
Red Dead Redemption 2 5−6
−1260%
65−70
+1260%
Shadow of the Tomb Raider 8−9
−1975%
166
+1975%
Watch Dogs: Legion 0−1 120

Full HD
High Preset

Assassin's Creed Odyssey 3−4
−2367%
70−75
+2367%
Battlefield 5 4−5
−2900%
120−130
+2900%
Call of Duty: Modern Warfare 10−12
−955%
110−120
+955%
Cyberpunk 2077 5−6
−1420%
76
+1420%
Far Cry 5 3−4
−4600%
141
+4600%
Far Cry New Dawn 2−3
−6250%
127
+6250%
Forza Horizon 4 5−6
−2460%
120−130
+2460%
Hitman 3 4−5
−4475%
183
+4475%
Horizon Zero Dawn 4−5
−2625%
109
+2625%
Metro Exodus 3−4
−3067%
95
+3067%
Red Dead Redemption 2 5−6
−1260%
65−70
+1260%
Shadow of the Tomb Raider 8−9
−1675%
142
+1675%
The Witcher 3: Wild Hunt 6−7
−2833%
176
+2833%
Watch Dogs: Legion 0−1 104

Full HD
Ultra Preset

Assassin's Creed Odyssey 3−4
−2367%
70−75
+2367%
Battlefield 5 4−5
−2900%
120−130
+2900%
Cyberpunk 2077 5−6
−1280%
69
+1280%
Far Cry 5 3−4
−4333%
133
+4333%
Far Cry New Dawn 2−3
−5500%
112
+5500%
Forza Horizon 4 5−6
−2460%
120−130
+2460%
The Witcher 3: Wild Hunt 6−7
−1550%
99
+1550%
Watch Dogs: Legion 0−1 61

1440p
High Preset

Call of Duty: Modern Warfare 5−6
−1340%
70−75
+1340%
Hitman 3 5−6
−2140%
112
+2140%
Horizon Zero Dawn 9−10
−744%
76
+744%
Metro Exodus 1−2
−5500%
56
+5500%
Red Dead Redemption 2 1−2
−3400%
35−40
+3400%
Shadow of the Tomb Raider 6−7
−1300%
84
+1300%

1440p
Ultra Preset

Cyberpunk 2077 1−2
−3900%
40
+3900%
Far Cry 5 4−5
−2525%
105
+2525%
Forza Horizon 4 0−1 90−95
The Witcher 3: Wild Hunt 2−3
−3100%
60−65
+3100%

4K
High Preset

Call of Duty: Modern Warfare 2−3
−1900%
40−45
+1900%
Hitman 3 2−3
−2750%
57
+2750%
Horizon Zero Dawn 8−9
−150%
20
+150%
Red Dead Redemption 2 1−2
−2200%
21−24
+2200%

4K
Ultra Preset

Assassin's Creed Odyssey 1−2
−2800%
27−30
+2800%
Assassin's Creed Valhalla 1−2
−2700%
28
+2700%
Far Cry 5 4−5
−1175%
51
+1175%
Far Cry New Dawn 6−7
−783%
53
+783%

This is how GT 640M and RX 6600 XT compete in popular games:

900p resolution:

  • RX 6600 XT is 1567% faster than GT 640M

1080p resolution:

  • RX 6600 XT is 500% faster than GT 640M

1200p resolution:

  • RX 6600 XT is 1479% faster than GT 640M

1440p resolution:

  • RX 6600 XT is 1750% faster than GT 640M

4K resolution:

  • RX 6600 XT is 1950% faster than GT 640M

Here's the range of performance differences observed across popular games:

  • in Far Cry New Dawn, with 1080p resolution and the Medium Preset, the RX 6600 XT is 6450% faster than the GT 640M.

All in all, in popular games:

  • Without exception, RX 6600 XT surpassed GT 640M in all 49 of our tests.

Advantages and disadvantages


Performance score 2.38 42.48
Recency 22 March 2012 30 July 2021
Maximum RAM amount 2 GB 8 GB
Chip lithography 28 nm 7 nm
Power consumption (TDP) 32 Watt 160 Watt

The Radeon RX 6600 XT is our recommended choice as it beats the GeForce GT 640M in performance tests.

Be aware that GeForce GT 640M is a notebook card while Radeon RX 6600 XT is a desktop one.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

User ratings

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.


NVIDIA GeForce GT 640M
GeForce GT 640M
AMD Radeon RX 6600 XT
Radeon RX 6600 XT

Similar GPU comparisons

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

User ratings: view and submit

Here you can see the user rating of the graphics cards, as well as rate them yourself.


3.7 269 votes

Rate NVIDIA GeForce GT 640M on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.3 3513 votes

Rate AMD Radeon RX 6600 XT on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions and comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.