AMD Radeon RX 7900 GRE vs AMD Radeon RX 6400. Specifications

Comparison of basic technical data of graphics cards AMD Radeon RX 7900 GRE and AMD Radeon RX 6400, chip, information processing units.

• AI Accelerators
  160 -
• Architecture
  RDNA 3 RDNA 2
• Based on
  AMD Radeon RX 7900 GRE AMD Radeon RX 6400
• Compute Units
  80 12
• Execution Units
  80 12
• Ray Accelerators
  80 12
• Shader
  5120 768
• GPU Chip
  - Navi 24 XL
• Render Output Units
  - 32
• Texture Units
  - 48

Video memory capacity, type, bus width and bandwidth describe different properties. These values alone do not determine graphics performance.

• Infinity Cache
  64 MB 16 MB
• Memory Bandwidth
  576 GB/s 128 GB/s
• Memory Bus
  256 bit 64 bit
• Memory Data Rate
  18 Gbps 16 Gbps
• Memory Size
  16 GB 4 GB
• Memory Type
  GDDR6 GDDR6
• Memory Clock
  - 2000 MHz

Published GPU clock frequencies describe different operating modes. Clock speed alone does not determine graphics performance.

• Boost Clock
  2245 MHz 2321 MHz
• Game Clock
  1880 MHz 2039 MHz
• Base Clock
  - 1923 MHz
• Overclocking
  - Yes

Graphics card power limits and recommended system power supply describe different specifications.

• TDP
  260 W 53 W
• Typical Board Power
  260 W 53 W
• Maximum Junction Temperature
  - -
• System Power Supply
  - 350 W (System power requirement)
• TDP (up)
  - No

Types and sizes of coolers for graphics card cooling system AMD Radeon RX 7900 GRE and AMD Radeon RX 6400.

• Cooler-Type
  - Air cooling
• Fan-Type
  - -
• Fan 1
  - -
• Fan 2
  - -
• Noise (Idle)
  - 0 dB / Silent
• Noise (Load)
  - -

Connectivity and connections.

• DisplayPort Version
  2.1 -
• HDMI Version
  2.1 HDMI 2.1 VRR and FRL
• Power Connectors
  2x8-Pin PCIe Powered
• DisplayPort Ports
  - 1 × DisplayPort 1.4a
• DVI Ports
  - -
• HDCP Version
  - 2.3
• HDMI Ports
  - 1 × HDMI 2.1
• Max. Displays
  - 2
• PCIe Interface
  - PCIe 4.0 x4
• USB-C Ports
  - -
• VGA Ports
  - -

Technical data that is used to its full potential in computer games.

• DirectX
  - Conflicting source values: 12.2 | 12_2
• DLSS / FSR
  - No
• LED
  - No LED lighting
• Max. resolution
  - 7680 × 4320
• Raytracing
  - Yes

Built-in support for video and image compression standards.

• AV1
  Decode / Encode Decode
• h264
  - Decode / Encode
• h265 / HEVC
  - Decode / Encode
• VP8
  - Decode / Encode
• VP9
  - Decode / Encode

The difference in size, weight and slot of the compared devices

• Height
  - -
• Length
  - -
• Slot Size
  - -
• Weight
  - -
• Width
  - -

Comparison of interfaces and release dates for GPU AMD Radeon RX 6400 and AMD Radeon RX 7900 GRE.

• Architecture source
  https://www.amd.com/content/dam/amd/en/documents/partner-hub/ryzen/amd-consumer-pocket-guide-ryzen-radeon-july-2024.pdf -
• Official source
  https://www.amd.com/en/products/graphics/desktops/radeon/7000-series/amd-radeon-rx-7900-gre.html https://www.amd.com/en/products/graphics/desktops/radeon/6000-series/amd-radeon-rx-6400.html
• Release date
  2023-07-27 2022-01-19
• Verification scope
  Explicit manufacturer fields refreshed; other original historical fields retained, not all reverified. Partial composite conflicts are preserved. Explicit manufacturer fields refreshed; other original historical fields retained, not all reverified. Partial composite conflicts are preserved.
• Verified on
  2026-09-30 2026-09-30
• Documents
  - data sheet
• Launch Price (historical)
  - -
• Manufacturer
  - AMD
• Part Number
  - -
• Process Technology
  - 6 nm

• FP32 (theoretical)
  46 TFLOPS -