Radeon RX 6400 vs RX 6900

Aggregate performance score

We've compared Radeon RX 6900 and Radeon RX 6400, covering specs and all relevant benchmarks.

RX 6900
2020
16 GB GDDR6, 255 Watt
69.42
+251%

RX 6900 outperforms RX 6400 by a whopping 251% based on our aggregate benchmark results.

Primary details

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

Place in the ranking22279
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data53.99
Power efficiency18.6625.60
ArchitectureRDNA 2.0 (2020−2024)RDNA 2.0 (2020−2024)
GPU code nameNavi 21Navi 24
Market segmentDesktopDesktop
Release date28 October 2020 (4 years ago)19 January 2022 (2 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 cores4608768
Core clock speedno data1923 MHz
Boost clock speed2105 MHz2321 MHz
Number of transistors23,000 million5,400 million
Manufacturing process technology7 nm6 nm
Power consumption (TDP)255 Watt53 Watt
Texture fill rate606.2111.4
Floating-point processing power19.4 TFLOPS3.565 TFLOPS
ROPs6432
TMUs28848
Ray Tracing Coresno data12

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).

InterfacePCIe 4.0 x16PCIe 4.0 x4
Width2-slot1-slot
Supplementary power connectors2x 8-pinNone

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 typeGDDR6GDDR6
Maximum RAM amount16 GB4 GB
Memory bus width256 Bit64 Bit
Memory clock speed16 GB/s2000 MHz
Memory bandwidth512.0 GB/s128.0 GB/s

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 Connectors1x HDMI, 2x DisplayPort, 1x USB Type-C1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI++

API compatibility

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

DirectX12 Ultimate (12_2)12 Ultimate (12_2)
Shader Model6.56.7
OpenGL4.64.6
OpenCL2.02.2
Vulkan1.21.3

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 6900 69.42
+251%
RX 6400 19.79

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 6900 26751
+251%
RX 6400 7626

Gaming performance

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

Pros & cons summary


Performance score 69.42 19.79
Recency 28 October 2020 19 January 2022
Maximum RAM amount 16 GB 4 GB
Chip lithography 7 nm 6 nm
Power consumption (TDP) 255 Watt 53 Watt

RX 6900 has a 250.8% higher aggregate performance score, and a 300% higher maximum VRAM amount.

RX 6400, on the other hand, has an age advantage of 1 year, a 16.7% more advanced lithography process, and 381.1% lower power consumption.

The Radeon RX 6900 is our recommended choice as it beats the Radeon RX 6400 in performance tests.


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

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AMD Radeon RX 6900
Radeon RX 6900
AMD Radeon RX 6400
Radeon RX 6400

Comparisons with similar GPUs

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

Community ratings

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


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Questions & comments

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