Radeon 840M vs RX 6400
Aggregate performance score
We've compared Radeon RX 6400 with Radeon 840M, including specs and performance data.
RX 6400 outperforms 840M by a whopping 102% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 330 | 518 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 43.48 | no data |
| Power efficiency | 26.92 | no data |
| Architecture | RDNA 2.0 (2020−2025) | RDNA 3.5 (2024−2025) |
| GPU code name | Navi 24 | Krackan Point |
| Market segment | Desktop | Laptop |
| Release date | 19 January 2022 (4 years ago) | March 2025 (1 year ago) |
| Launch price (MSRP) | $159 | no data |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
Performance to price scatter graph
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 | 768 | 256 |
| Core clock speed | 1923 MHz | 400 MHz |
| Boost clock speed | 2321 MHz | 2900 MHz |
| Number of transistors | 5,400 million | no data |
| Manufacturing process technology | 6 nm | 4 nm |
| Power consumption (TDP) | 53 Watt | 15 Watt |
| Texture fill rate | 111.4 | 46.40 |
| Floating-point processing power | 3.565 TFLOPS | 1.4848 TFLOPS |
| ROPs | 32 | 8 |
| TMUs | 48 | 16 |
| Ray Tracing Cores | 12 | 4 |
| L0 Cache | 192 KB | 64 KB |
| L1 Cache | 256 KB | 64 KB |
| L2 Cache | 1024 KB | 1024 KB |
| L3 Cache | 16 MB | no data |
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 4.0 x4 | PCIe 4.0 x8 |
| 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 | GDDR6 | System Shared |
| Maximum RAM amount | 4 GB | System Shared |
| Memory bus width | 64 Bit | System Shared |
| Memory clock speed | 2000 MHz | System Shared |
| Memory bandwidth | 128.0 GB/s | no data |
| Shared memory | - | + |
| Resizable BAR | + | - |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 1x HDMI 2.1, 1x DisplayPort 1.4a | Portable Device Dependent |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 12 Ultimate (12_2) |
| Shader Model | 6.7 | 6.8 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.2 | 2.1 |
| Vulkan | 1.3 | 1.4 |
Synthetic benchmarks
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.
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.
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 | 50−55
+100%
| 25
−100%
|
Cost per frame, $
| 1080p | 3.18 | no data |
FPS performance in popular games
Full HD
Low
| Counter-Strike 2 | 84
+0%
|
84
+0%
|
| Cyberpunk 2077 | 18−20
+0%
|
18−20
+0%
|
| Resident Evil 4 Remake | 18−20
+0%
|
18−20
+0%
|
Full HD
Medium
| Battlefield 5 | 40−45
+0%
|
40−45
+0%
|
| Counter-Strike 2 | 68
+0%
|
68
+0%
|
| Cyberpunk 2077 | 18−20
+0%
|
18−20
+0%
|
| Far Cry 5 | 30−33
+0%
|
30−33
+0%
|
| Fortnite | 55−60
+0%
|
55−60
+0%
|
| Forza Horizon 4 | 40−45
+0%
|
40−45
+0%
|
| Forza Horizon 5 | 27−30
+0%
|
27−30
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 30−35
+0%
|
30−35
+0%
|
| Valorant | 90−95
+0%
|
90−95
+0%
|
Full HD
High
| Battlefield 5 | 40−45
+0%
|
40−45
+0%
|
| Counter-Strike 2 | 15
+0%
|
15
+0%
|
| Counter-Strike: Global Offensive | 140−150
+0%
|
140−150
+0%
|
| Cyberpunk 2077 | 18−20
+0%
|
18−20
+0%
|
| Far Cry 5 | 30−33
+0%
|
30−33
+0%
|
| Fortnite | 55−60
+0%
|
55−60
+0%
|
| Forza Horizon 4 | 40−45
+0%
|
40−45
+0%
|
| Forza Horizon 5 | 27−30
+0%
|
27−30
+0%
|
| Grand Theft Auto V | 32
+0%
|
32
+0%
|
| Metro Exodus | 18−20
+0%
|
18−20
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 30−35
+0%
|
30−35
+0%
|
| The Witcher 3: Wild Hunt | 24−27
+0%
|
24−27
+0%
|
| Valorant | 90−95
+0%
|
90−95
+0%
|
Full HD
Ultra
| Battlefield 5 | 40−45
+0%
|
40−45
+0%
|
| Cyberpunk 2077 | 18−20
+0%
|
18−20
+0%
|
| Far Cry 5 | 30−33
+0%
|
30−33
+0%
|
| Forza Horizon 4 | 40−45
+0%
|
40−45
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 30−35
+0%
|
30−35
+0%
|
| The Witcher 3: Wild Hunt | 24−27
+0%
|
24−27
+0%
|
Full HD
Epic
| Fortnite | 55−60
+0%
|
55−60
+0%
|
1440p
High
| Counter-Strike 2 | 16−18
+0%
|
16−18
+0%
|
| Counter-Strike: Global Offensive | 70−75
+0%
|
70−75
+0%
|
| Grand Theft Auto V | 12−14
+0%
|
12−14
+0%
|
| Metro Exodus | 10−11
+0%
|
10−11
+0%
|
| Valorant | 100−110
+0%
|
100−110
+0%
|
1440p
Ultra
| Battlefield 5 | 21−24
+0%
|
21−24
+0%
|
| Cyberpunk 2077 | 8−9
+0%
|
8−9
+0%
|
| Far Cry 5 | 18−20
+0%
|
18−20
+0%
|
| Forza Horizon 4 | 21−24
+0%
|
21−24
+0%
|
| The Witcher 3: Wild Hunt | 12−14
+0%
|
12−14
+0%
|
1440p
Epic
| Fortnite | 20−22
+0%
|
20−22
+0%
|
4K
High
| Counter-Strike 2 | 4−5
+0%
|
4−5
+0%
|
| Grand Theft Auto V | 20−22
+0%
|
20−22
+0%
|
| Metro Exodus | 5−6
+0%
|
5−6
+0%
|
| The Witcher 3: Wild Hunt | 10−11
+0%
|
10−11
+0%
|
| Valorant | 45−50
+0%
|
45−50
+0%
|
4K
Ultra
| Battlefield 5 | 10−12
+0%
|
10−12
+0%
|
| Cyberpunk 2077 | 3−4
+0%
|
3−4
+0%
|
| Far Cry 5 | 9−10
+0%
|
9−10
+0%
|
| Forza Horizon 4 | 16−18
+0%
|
16−18
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 9−10
+0%
|
9−10
+0%
|
4K
Epic
| Fortnite | 9−10
+0%
|
9−10
+0%
|
This is how RX 6400 and Radeon 840M compete in popular games:
- RX 6400 is 100% faster in 1080p
All in all, in popular games:
- there's a draw in 54 tests (100%)
Pros & cons summary
| Performance score | 18.53 | 9.19 |
| Chip lithography | 6 nm | 4 nm |
| Power consumption (TDP) | 53 Watt | 15 Watt |
RX 6400 has a 101.6% higher aggregate performance score.
Radeon 840M, on the other hand, has a 50% more advanced lithography process, and 253.3% lower power consumption.
The Radeon RX 6400 is our recommended choice as it beats the Radeon 840M in performance tests.
Be aware that Radeon RX 6400 is a desktop graphics card while Radeon 840M is a notebook one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
