Radeon RX 6400 vs R9 M290X Mac Edition

Primary details

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

Place in the rankingnot rated279
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data53.99
Power efficiencyno data25.60
ArchitectureGCN 1.0 (2011−2020)RDNA 2.0 (2020−2024)
GPU code namePitcairnNavi 24
Market segmentLaptopDesktop
Release date23 November 2014 (10 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 cores1024768
Core clock speed850 MHz1923 MHz
Boost clock speed975 MHz2321 MHz
Number of transistors2,800 million5,400 million
Manufacturing process technology28 nm6 nm
Power consumption (TDP)80 Watt53 Watt
Texture fill rate62.40111.4
Floating-point processing power1.997 TFLOPS3.565 TFLOPS
ROPs3232
TMUs6448
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 3.0 x16PCIe 4.0 x4
Widthno data1-slot
Supplementary power connectorsNoneNone

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 typeGDDR5GDDR6
Maximum RAM amount2 GB4 GB
Memory bus width256 Bit64 Bit
Memory clock speed1365 MHz2000 MHz
Memory bandwidth174.7 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 ConnectorsNo outputs1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI-+

API compatibility

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

DirectX12 (11_1)12 Ultimate (12_2)
Shader Model5.16.7
OpenGL4.64.6
OpenCL1.22.2
Vulkan1.21.3

Pros & cons summary


Recency 23 November 2014 19 January 2022
Maximum RAM amount 2 GB 4 GB
Chip lithography 28 nm 6 nm
Power consumption (TDP) 80 Watt 53 Watt

RX 6400 has an age advantage of 7 years, a 100% higher maximum VRAM amount, a 366.7% more advanced lithography process, and 50.9% lower power consumption.

We couldn't decide between Radeon R9 M290X Mac Edition and Radeon RX 6400. We've got no test results to judge.

Be aware that Radeon R9 M290X Mac Edition is a notebook card while Radeon RX 6400 is a desktop one.


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

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.


AMD Radeon R9 M290X Mac Edition
Radeon R9 M290X Mac Edition
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.


3.5 2 votes

Rate Radeon R9 M290X Mac Edition on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4 1978 votes

Rate Radeon RX 6400 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.