Radeon RX 6400 vs T400

Place in performance ranking	434	268
Place by popularity	not in top-100	89
Value for money	16.46	12.10
Architecture	Turing (2018−2021)	RDNA 2.0 (2020−2022)
GPU code name	TU117	Navi 24
Market segment	Desktop	Desktop
Release date	6 May 2021 (2 years old)	19 January 2022 (2 years old)
Launch price (MSRP)	no data	$159
Current price	$83	$376 (2.4x MSRP)

Value for money

Performance to price ratio. The higher, the better.

T400 has 36% better value for money than RX 6400.

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 cores	384	768
Boost clock speed	1425 MHz	2321 MHz
Number of transistors	4,700 million	5,400 million
Manufacturing process technology	12 nm	6 nm
Power consumption (TDP)	30 Watt	53 Watt
Texture fill rate	34.20	111.4

Size and 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).

Interface	PCIe 3.0 x16	PCIe 4.0 x4
Width	1-slot	1-slot
Supplementary power connectors	None	None

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 type	GDDR6	GDDR6
Maximum RAM amount	2 GB	4 GB
Memory bus width	64 Bit	64 Bit
Memory clock speed	10 GB/s	16 GB/s
Memory bandwidth	80 GB/s	128.0 GB/s

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 Connectors	3x mini-DisplayPort	1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI	no data	+

API support

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

DirectX	12 (12_1)	12 Ultimate (12_2)
Shader Model	6.6	6.6
OpenGL	4.6	4.6
OpenCL	3.0	2.2
Vulkan	1.2	1.3
CUDA	7.5	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.

T400 9.37

RX 6400 19.47
+108%

Radeon RX 6400 outperforms T400 by 108% based on our aggregated 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%

T400 3628

RX 6400 7542
+108%

Radeon RX 6400 outperforms T400 by 108% in Passmark.

Gaming performance

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

Advantages and disadvantages

Performance score	9.37	19.47
Recency	6 May 2021	19 January 2022
Maximum RAM amount	2 GB	4 GB
Chip lithography	12 nm	6 nm
Power consumption (TDP)	30 Watt	53 Watt