Radeon RX 6600M vs GeForce GT 640

Place in the ranking	769	136
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.20	no data
Power efficiency	3.22	24.57
Architecture	Kepler (2012−2018)	RDNA 2.0 (2020−2024)
GPU code name	GK107	Navi 23
Market segment	Desktop	Laptop
Release date	5 June 2012 (12 years ago)	31 May 2021 (3 years ago)
Launch price (MSRP)	$99	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	384	1792
Core clock speed	902 MHz	2068 MHz
Boost clock speed	no data	2416 MHz
Number of transistors	1,270 million	11,060 million
Manufacturing process technology	28 nm	7 nm
Power consumption (TDP)	65 Watt	100 Watt
Texture fill rate	28.86	270.6
Floating-point processing power	0.6927 TFLOPS	8.659 TFLOPS
ROPs	16	64
TMUs	32	112
Ray Tracing Cores	no data	28

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Laptop size	no data	medium sized
Interface	PCIe 3.0 x16	PCIe 4.0 x8
Length	145 mm	no data
Width	1-slot	no data
Supplementary power connectors	None	None

VRAM capacity and type

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 type	DDR3	GDDR6
Maximum RAM amount	2 GB	8 GB
Memory bus width	128 Bit	128 Bit
Memory clock speed	891 MHz	1750 MHz
Memory bandwidth	28.51 GB/s	224.0 GB/s
Shared memory	no data	-

Connectivity and outputs

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 Connectors	1x DVI, 1x HDMI, 1x DisplayPort	No outputs
HDMI	+	-

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 Ultimate (12_2)
Shader Model	5.1	6.5
OpenGL	4.6	4.6
OpenCL	1.2	2.1
Vulkan	1.1.126	1.3
CUDA	3.0	-

Synthetic benchmark performance

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

Combined synthetic benchmark score

This is our combined benchmark 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 640 3.06

RX 6600M 35.87
+1072%

Passmark

This is the most ubiquitous GPU benchmark. 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.

GT 640 1178

RX 6600M 13820
+1073%

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.

GT 640 1560

RX 6600M 23525
+1408%

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:

Full HD	8−9 −1138%	99 +1138%
1440p	4−5 −1225%	53 +1225%
4K	2−3 −1450%	31 +1450%

Cost per frame, $

1080p	12.38	no data
1440p	24.75	no data
4K	49.50	no data

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

110

+0%

110

+0%

Full HD
Medium Preset

Assassin's Creed Odyssey	108 +0%	108 +0%
Assassin's Creed Valhalla	95 +0%	95 +0%
Battlefield 5	110−120 +0%	110−120 +0%
Call of Duty: Modern Warfare	70−75 +0%	70−75 +0%
Cyberpunk 2077	90 +0%	90 +0%
Far Cry 5	75−80 +0%	75−80 +0%
Far Cry New Dawn	85−90 +0%	85−90 +0%
Forza Horizon 4	180−190 +0%	180−190 +0%
Hitman 3	75−80 +0%	75−80 +0%
Horizon Zero Dawn	150−160 +0%	150−160 +0%
Metro Exodus	110−120 +0%	110−120 +0%
Red Dead Redemption 2	85−90 +0%	85−90 +0%
Shadow of the Tomb Raider	120−130 +0%	120−130 +0%
Watch Dogs: Legion	120−130 +0%	120−130 +0%

Full HD
High Preset

Assassin's Creed Odyssey	199 +0%	199 +0%
Assassin's Creed Valhalla	79 +0%	79 +0%
Battlefield 5	110−120 +0%	110−120 +0%
Call of Duty: Modern Warfare	70−75 +0%	70−75 +0%
Cyberpunk 2077	72 +0%	72 +0%
Far Cry 5	75−80 +0%	75−80 +0%
Far Cry New Dawn	85−90 +0%	85−90 +0%
Forza Horizon 4	180−190 +0%	180−190 +0%
Hitman 3	75−80 +0%	75−80 +0%
Horizon Zero Dawn	150−160 +0%	150−160 +0%
Metro Exodus	110−120 +0%	110−120 +0%
Red Dead Redemption 2	85−90 +0%	85−90 +0%
Shadow of the Tomb Raider	173 +0%	173 +0%
The Witcher 3: Wild Hunt	70−75 +0%	70−75 +0%
Watch Dogs: Legion	120−130 +0%	120−130 +0%

Full HD
Ultra Preset

Assassin's Creed Odyssey	79 +0%	79 +0%
Assassin's Creed Valhalla	69 +0%	69 +0%
Call of Duty: Modern Warfare	70−75 +0%	70−75 +0%
Cyberpunk 2077	61 +0%	61 +0%
Far Cry 5	75−80 +0%	75−80 +0%
Forza Horizon 4	168 +0%	168 +0%
Hitman 3	75−80 +0%	75−80 +0%
Horizon Zero Dawn	134 +0%	134 +0%
Shadow of the Tomb Raider	153 +0%	153 +0%
The Witcher 3: Wild Hunt	85 +0%	85 +0%
Watch Dogs: Legion	59 +0%	59 +0%

Full HD
Epic Preset

Red Dead Redemption 2

85−90

+0%

85−90

+0%

1440p
High Preset

Battlefield 5	65−70 +0%	65−70 +0%
Far Cry New Dawn	50−55 +0%	50−55 +0%

1440p
Ultra Preset

Assassin's Creed Odyssey	51 +0%	51 +0%
Assassin's Creed Valhalla	52 +0%	52 +0%
Call of Duty: Modern Warfare	40−45 +0%	40−45 +0%
Cyberpunk 2077	36 +0%	36 +0%
Far Cry 5	40−45 +0%	40−45 +0%
Forza Horizon 4	200−210 +0%	200−210 +0%
Hitman 3	45−50 +0%	45−50 +0%
Horizon Zero Dawn	98 +0%	98 +0%
Metro Exodus	85 +0%	85 +0%
Shadow of the Tomb Raider	100 +0%	100 +0%
The Witcher 3: Wild Hunt	62 +0%	62 +0%
Watch Dogs: Legion	180−190 +0%	180−190 +0%

1440p
Epic Preset

Red Dead Redemption 2

60−65

+0%

60−65

+0%

4K
High Preset

Battlefield 5	35−40 +0%	35−40 +0%
Far Cry New Dawn	27−30 +0%	27−30 +0%
Hitman 3	27−30 +0%	27−30 +0%
Horizon Zero Dawn	170−180 +0%	170−180 +0%
Metro Exodus	40−45 +0%	40−45 +0%
The Witcher 3: Wild Hunt	44 +0%	44 +0%

4K
Ultra Preset

Assassin's Creed Odyssey	29 +0%	29 +0%
Assassin's Creed Valhalla	27 +0%	27 +0%
Call of Duty: Modern Warfare	21−24 +0%	21−24 +0%
Cyberpunk 2077	14 +0%	14 +0%
Far Cry 5	20−22 +0%	20−22 +0%
Forza Horizon 4	74 +0%	74 +0%
Shadow of the Tomb Raider	52 +0%	52 +0%
Watch Dogs: Legion	21 +0%	21 +0%

4K
Epic Preset

Red Dead Redemption 2

30−35

+0%

30−35

+0%

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

RX 6600M is 1138% faster in 1080p
RX 6600M is 1225% faster in 1440p
RX 6600M is 1450% faster in 4K

All in all, in popular games:

there's a draw in 72 tests (100%)

Pros & cons summary

Performance score	3.06	35.87
Recency	5 June 2012	31 May 2021
Maximum RAM amount	2 GB	8 GB
Chip lithography	28 nm	7 nm
Power consumption (TDP)	65 Watt	100 Watt

GT 640 has 53.8% lower power consumption.

RX 6600M, on the other hand, has a 1072.2% higher aggregate performance score, an age advantage of 8 years, a 300% higher maximum VRAM amount, and a 300% more advanced lithography process.

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

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

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