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

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

• Infinity Cache
  64 MB -
• Memory Speed
  18 Gbps 16 Gbps
• Memory Bandwidth
  576 GB/s -
• Memory Bus
  256 bit -
• Memory Type
  GDDR6 GDDR6
• Memory Size
  16 GB 4 GB
• Memory Interface
  - 64 bit
• Memory Bandwith
  - 128 GB/s

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

• Boost Clock
  2245 MHz 2.321 GHz
• Game Clock
  1880 MHz -
• Overclocking
  - Yes
• Avg (Game) Clock
  - 2.039 GHz
• Base Clock
  - 1.923 GHz

Connectors, the number of thermal watts emitted in normal mode and at overclocking.

• Power Connectors
  2x8-Pin -
• TDP
  260 W 53 W
• TDP (up)
  - No

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

• Noise (Idle)
  - 0 dB / Silent
• Cooler-Type
  - Air cooling

Connectivity and connections.

• DP Ports
  - 1x DP v1.4a
• HDMI Ports
  - 1x HDMI v2.1
• HDCP-Version
  - 2.3
• Max. Displays
  - 2

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

• Peak FP32 (theoretical)
  46 TFLOPS -
• LED
  - No LED lighting
• DLSS / FSR
  - No
• Raytracing
  - Yes
• Max. resolution
  - 7680x4320
• Max. Displays
  - 2

Built-in support for video and image compression standards.

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

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 -
• Verified on
  2026-09-30 -
• Official source
  https://www.amd.com/en/products/graphics/desktops/radeon/7000-series/amd-radeon-rx-7900-gre.html -
• Documents
  - data sheet
• Structure size
  - 6 nm
• Release date
  - Q2/2022
• GPU Interface
  - PCIe 4.0 x 4
• Architecture
  - RDNA 2
• Manufacturer
  - AMD