Radeon RX 6400 vs RX 6600M

Place in the ranking	137	281
Place by popularity	not in top-100	92
Cost-effectiveness evaluation	no data	53.35
Power efficiency	24.84	25.78
Architecture	RDNA 2.0 (2020−2024)	RDNA 2.0 (2020−2024)
GPU code name	Navi 23	Navi 24
Market segment	Laptop	Desktop
Release date	31 May 2021 (3 years ago)	19 January 2022 (3 years ago)
Launch price (MSRP)	no data	$159

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	1792	768
Core clock speed	2068 MHz	1923 MHz
Boost clock speed	2416 MHz	2321 MHz
Number of transistors	11,060 million	5,400 million
Manufacturing process technology	7 nm	6 nm
Power consumption (TDP)	100 Watt	53 Watt
Texture fill rate	270.6	111.4
Floating-point processing power	8.659 TFLOPS	3.565 TFLOPS
ROPs	64	32
TMUs	112	48
Ray Tracing Cores	28	12

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	medium sized	no data
Interface	PCIe 4.0 x8	PCIe 4.0 x4
Width	no data	1-slot
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	GDDR6	GDDR6
Maximum RAM amount	8 GB	4 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	1750 MHz	2000 MHz
Memory bandwidth	224.0 GB/s	128.0 GB/s
Shared memory	-	-

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	No outputs	1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI	-	+

API compatibility

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

DirectX	12 Ultimate (12_2)	12 Ultimate (12_2)
Shader Model	6.5	6.7
OpenGL	4.6	4.6
OpenCL	2.1	2.2
Vulkan	1.3	1.3

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.

RX 6600M 36.08
+81.8%

RX 6400 19.85

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.

RX 6600M 13871
+81.8%

RX 6400 7631

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	99 +98%	50−55 −98%
1440p	52 +92.6%	27−30 −92.6%
4K	31 +93.8%	16−18 −93.8%

Cost per frame, $

1080p	no data	3.18
1440p	no data	5.89
4K	no data	9.94

FPS performance in popular games

Full HD
Low Preset

Counter-Strike 2	92 +84%	50−55 −84%
Cyberpunk 2077	110 +83.3%	60−65 −83.3%
Elden Ring	90 +100%	45−50 −100%

Full HD
Medium Preset

Battlefield 5	95−100 +98%	50−55 −98%
Counter-Strike 2	75 +87.5%	40−45 −87.5%
Cyberpunk 2077	79 +97.5%	40−45 −97.5%
Forza Horizon 4	216 +96.4%	110−120 −96.4%
Metro Exodus	100 +81.8%	55−60 −81.8%
Red Dead Redemption 2	70−75 +106%	35−40 −106%
Valorant	160 +88.2%	85−90 −88.2%

Full HD
High Preset

Battlefield 5	95−100 +98%	50−55 −98%
Counter-Strike 2	66 +88.6%	35−40 −88.6%
Cyberpunk 2077	64 +82.9%	35−40 −82.9%
Dota 2	115 +91.7%	60−65 −91.7%
Elden Ring	113 +88.3%	60−65 −88.3%
Far Cry 5	46 +91.7%	24−27 −91.7%
Fortnite	160−170 +90.6%	85−90 −90.6%
Forza Horizon 4	173 +82.1%	95−100 −82.1%
Grand Theft Auto V	116 +93.3%	60−65 −93.3%
Metro Exodus	78 +95%	40−45 −95%
PLAYERUNKNOWN'S BATTLEGROUNDS	190−200 +93%	100−105 −93%
Red Dead Redemption 2	70−75 +106%	35−40 −106%
The Witcher 3: Wild Hunt	120−130 +93.8%	65−70 −93.8%
Valorant	140−150 +92%	75−80 −92%
World of Tanks	270−280 +86%	150−160 −86%

Full HD
Ultra Preset

Battlefield 5	95−100 +98%	50−55 −98%
Counter-Strike 2	49 +104%	24−27 −104%
Cyberpunk 2077	54 +100%	27−30 −100%
Dota 2	104 +89.1%	55−60 −89.1%
Far Cry 5	90−95 +86%	50−55 −86%
Forza Horizon 4	153 +91.3%	80−85 −91.3%
PLAYERUNKNOWN'S BATTLEGROUNDS	190−200 +93%	100−105 −93%
Valorant	144 +92%	75−80 −92%

1440p
High Preset

Dota 2	61 +103%	30−33 −103%
Elden Ring	70−75 +103%	35−40 −103%
Grand Theft Auto V	61 +103%	30−33 −103%
PLAYERUNKNOWN'S BATTLEGROUNDS	170−180 +84.2%	95−100 −84.2%
Red Dead Redemption 2	35−40 +94.4%	18−20 −94.4%
World of Tanks	230−240 +91.7%	120−130 −91.7%

1440p
Ultra Preset

Battlefield 5	65−70 +94.3%	35−40 −94.3%
Counter-Strike 2	35−40 +94.4%	18−20 −94.4%
Cyberpunk 2077	18 +100%	9−10 −100%
Far Cry 5	110−120 +93.3%	60−65 −93.3%
Forza Horizon 4	100 +81.8%	55−60 −81.8%
Metro Exodus	85 +88.9%	45−50 −88.9%
The Witcher 3: Wild Hunt	62 +107%	30−33 −107%
Valorant	100−110 +98.2%	55−60 −98.2%

4K
High Preset

Counter-Strike 2	35−40 +100%	18−20 −100%
Dota 2	58 +93.3%	30−33 −93.3%
Elden Ring	30−35 +83.3%	18−20 −83.3%
Grand Theft Auto V	58 +93.3%	30−33 −93.3%
Metro Exodus	28 +100%	14−16 −100%
PLAYERUNKNOWN'S BATTLEGROUNDS	110−120 +91.7%	60−65 −91.7%
Red Dead Redemption 2	21−24 +91.7%	12−14 −91.7%
The Witcher 3: Wild Hunt	58 +93.3%	30−33 −93.3%

4K
Ultra Preset

Battlefield 5	40−45 +95.2%	21−24 −95.2%
Counter-Strike 2	35−40 +100%	18−20 −100%
Cyberpunk 2077	7 +133%	3−4 −133%
Dota 2	80 +100%	40−45 −100%
Far Cry 5	50−55 +92.6%	27−30 −92.6%
Fortnite	50−55 +85.2%	27−30 −85.2%
Forza Horizon 4	52 +92.6%	27−30 −92.6%
Valorant	55−60 +90%	30−33 −90%

This is how RX 6600M and RX 6400 compete in popular games:

RX 6600M is 98% faster in 1080p
RX 6600M is 93% faster in 1440p
RX 6600M is 94% faster in 4K

Pros & cons summary

Performance score	36.08	19.85
Recency	31 May 2021	19 January 2022
Maximum RAM amount	8 GB	4 GB
Chip lithography	7 nm	6 nm
Power consumption (TDP)	100 Watt	53 Watt