SAPPHIRE PULSE Radeon RX 6400 4GB vs SAPPHIRE Radeon RX 7900 XT 20GB. Specifications

Comparison of basic technical data of graphics cards SAPPHIRE PULSE Radeon RX 6400 4GB and SAPPHIRE Radeon RX 7900 XT 20GB, chip, information processing units.

• Based on
  AMD Radeon RX 6400 AMD Radeon RX 7900 XT
• Board Manufacturer
  Sapphire Sapphire
• Board Model
  SAPPHIRE PULSE Radeon RX 6400 4GB SAPPHIRE Radeon RX 7900 XT 20GB
• Board SKU
  11315-01-20G 21323-01-20G
• Stream Processors
  768 5376
• Compute Units
  - 84 CU (with RT+AI Accelerators)

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

• Memory Data Rate
  16 Gbps Effective 20 Gbps Effective
• Memory Size
  4 GB 20 GB
• Memory Type
  GDDR6 GDDR6

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

• Boost Clock
  Up to 2321 MHz Up to 2400 MHz
• Game Clock
  Up to 2039 MHz Up to 2000 MHz

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

• System Power Supply
  350 W (System power requirement) 750 W (System power requirement)
• Total Board Power
  55W (Board Power) 308 W

Connectivity and connections.

• DisplayPort Ports
  1 × DisplayPort 2 × DisplayPort
• HDMI Ports
  1 × HDMI 1 × HDMI
• PCIe Interface
  PCIe 4.0 x4 PCIe 4.0 x16
• USB-C Ports
  - 1 × USB-C

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

• Form Factor
  1 slot, ATX Low Profile Dimension: 170(L)X 56.2(W)X 17.2(H)mm 2.5 slot, ATX Dimension: 276.4(L)X 112.7(W)X 51.25 (H)mm

Comparison of interfaces and release dates for GPU SAPPHIRE Radeon RX 7900 XT 20GB and SAPPHIRE PULSE Radeon RX 6400 4GB.

• Official source
  https://www.sapphiretech.com/en/consumer/pulse-radeon-rx-6400-4g-gddr6 https://www.sapphiretech.com/en/consumer/21323-01-20g-radeon-rx-7900-xt-20g-gddr6
• Verified on
  2026-09-30 2026-09-30