This article covers POWERCOLOR グラフィックボード AMD Radeon RX6400 GDDR6 4GB 搭載モデル 【国内正規代理店品】 AXRX 6400 4GBD6-DH 黒.

Overview

The POWERCOLOR AXRX 6400 4GBD6-DH is an entry-level graphics card built around the AMD Radeon RX 6400 GPU. It comes with 4GB of GDDR6 memory and requires no auxiliary power, making it an easy drop-in upgrade for systems with limited PSU headroom. The card includes a low-profile bracket, so it fits into small form-factor cases and HTPCs without hassle. This card targets 1080p light gaming, office productivity, and media playback. Its PCIe 4.0 x4 interface works best with modern motherboards, though it will function on PCIe 3.0 slots with some performance loss. The 64-bit memory bus is a notable limitation, so demanding AAA titles will struggle even at low settings. Positioned firmly in the entry-level segment, the RX 6400 is a sensible step up from integrated graphics. It offers modern features like DirectX 12 Ultimate and hardware-accelerated ray tracing (though performance is modest).

Compatibility Guide

Interface: PCI Express 4.0 x4 (backward compatible with PCIe 3.0, but bandwidth is halved). Power: No external PCIe power connector required; draws power solely from the slot. Recommended PSU: 350W or higher. Dimensions: 165 x 125 x 40 mm (without bracket). Low-profile bracket included; standard bracket also provided for regular tower cases. Outputs: 1x DisplayPort 1.4, 1x HDMI 2.1. Dual-monitor setups are supported, but triple monitors will need additional hardware.

Product Info

Released around 2022, this card carries a 2-year warranty through domestic distributors. The GPU is an AMD Radeon RX 6400 based on RDNA 2 architecture built on a 6nm process. Boost clock reaches 2,321 MHz, memory runs at 16 Gbps over a 64-bit bus for 128 GB/s bandwidth. TDP is just 53W, keeping heat and noise low. Market positioning is entry-level, ideal for users moving beyond integrated graphics or building a compact media PC.

Best Use Cases

Light 1080p gaming: Play titles like Fortnite, Apex Legends, or CS2 at medium settings. The card's low power draw means it can slot into almost any existing build. Small-form-factor or HTPC builds: The low-profile design fits Mini-ITX cases and slim desktops. It handles 4K video playback smoothly and supports modern display outputs. Upgrading from integrated graphics: If your CPU's IGP struggles with basic 3D tasks or dual monitors, this card provides a meaningful boost without requiring a PSU upgrade. Quiet, power-efficient office PC: With a 53W TDP and a single quiet fan, it's suitable for silent workstations or living-room computers.

Things to Consider

The 64-bit memory bus limits bandwidth to 128 GB/s, which hampers performance in memory-intensive games like Cyberpunk 2077 or Baldur's Gate 3. Even at low settings, expect sub-30 fps in such titles. On PCIe 3.0 motherboards, the effective bandwidth drops to PCIe 3.0 x4, causing a noticeable performance penalty (up to 20-30% in some scenarios). Pairing with a PCIe 4.0 board is strongly recommended. Only one DisplayPort and one HDMI port are available. Triple-monitor setups require additional adapters or a second GPU. Competitors in the same price bracket include the GeForce GTX 1650 and used GTX 1060. The RX 6400 offers newer architecture and lower power consumption, but falls behind in raw gaming performance due to its narrow memory bus. ## FAQ
Q: Can this card handle 4K video playback? A: Yes, with DisplayPort 1.4 and HDMI 2.1, it supports 4K 60Hz output for movies and desktop use. 4K gaming is not feasible. Q: What power supply do I need? A: AMD recommends a 350W PSU. Since the card draws all power from the PCIe slot, even a 300W unit may work, but 350W or higher is advised for stability. Q: Will it work in a PCIe 3.0 motherboard? A: Physically yes, but performance will be reduced due to the limited bandwidth. If you have a PCIe 3.0 board, consider a card with a x16 interface instead.

Product Disclosure (Amazon)

  • Manufacturer: POWERCOLOR
  • Seller: 海亀商通
  • Fulfilled by: 海亀商通
  • ASIN: B09WXVVP89
  • Note: This article covers a manufacturer-made product based on Amazon listing details.