ASRock RX 6400 Challenger ITX
The ASRock RX 6400 Challenger ITX is ASRock’s version of the Radeon RX 6400. At 162 mm it’s 10 mm shorter than the 172 mm reference design. At 2 slots it’s wider than the 1-slot reference design. Below you’ll find every current retailer price and the full spec sheet.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Gaming & render performance
Gaming score: geometric mean of in-game FPS, normalized so the RTX 5090 = 100. Blender: samples/min from Blender Open Data.
1080p Gaming
1440p Gaming
4K Gaming
Blender
The Radeon RX 6400 scores 11.9 at 1080p, 0.0 at 1440p, and 0.0 at 4K on a scale where 100 = the fastest GPU we test (RTX 5090). These scores apply to all board versions of this chip.
Where to buy
Every in-stock retailer we track, cheapest first.
- AmazonCHEAPEST$475.00In stockUpdated 2026-07-28
| Retailer | Price | Availability | Updated | Buy |
|---|---|---|---|---|
| AmazonCHEAPEST | $475.00 | In Stock | 2026-07-28 | |
Specifications
GPU chip
- Chip
- Radeon RX 6400
- Architecture
- RDNA 2 Navi 24
- Process node
- TSMC N6
- Shader cores
- 768
- SM count
- 12
- Texture units (TMUs)
- 48
- Render outputs (ROPs)
- 32
- RT cores
- 12 · 1st gen
Memory
- VRAM
- 4GB GDDR6
- Memory bus
- 64-bit
- Bandwidth
- 128 GB/s
- Memory speed
- 16 Gbps
- Infinity Cache
- 16 MB
GPU die
- Foundry
- TSMC
- Die size
- 107 mm²
- Transistors
- 5.4 billion
- Generation
- Radeon RX 6000
Display & connectivity
- Max resolution
- 7680 × 4320
- Max displays
- 4
- HDCP
- 2.3
APIs & software
- DirectX
- 12 Ultimate (12.2)
- Vulkan
- 1.3
- OpenGL
- 4.6
- OpenCL
- 2.2
- Shader model
- 6.7
Platform features
- Upscaling
- FSR 2
- Resizable BAR
- Yes
Video encoding & decoding
| Codec | Encode | Decode |
|---|---|---|
| H.264 / AVC | Not supported | Not supported |
| H.265 / HEVC | Not supported | Supported |
| AV1 | Not supported | Not supported |
| VP9 | Not supported | Not supported |
Decoder: VCN (HEVC decode only)
Board
- Boost clock
- 2321 MHz(reference)
- Base clock
- 1923 MHz
- TDP
- 53W
- Recommended PSU
- 350W
Physical
- Cooling
- Air
- Length
- Reference design:
172 mmThis card: 162 mm - Slot width
- Reference design:
1 slotsThis card: 2 slots - Outputs
- 1 HDMI 2.1, 1 Displayport 1.4a
Identifiers
- ASIN
- B09YRXYDTT
Chip-level specs — cores, memory, die, APIs, media engine and platform features — are shared by every version of the Radeon RX 6400. The Board, Physical and Identifier boxes are specific to this ASRock variant; a struck-through value shows where it differs from the reference design.
Other versions of the Radeon RX 6400
Same GPU, different board — picked by what buyers usually compare.
Affiliate disclosure: Some links on this page are affiliate links — MaxMyBuild may earn a commission at no extra cost to you if you buy through them. As an Amazon Associate, MaxMyBuild earns from qualifying purchases. For Amazon, current price and availability are shown on the Amazon product page; product prices and availability are accurate as of the date and time of purchase and are subject to change. Prices shown for other retailers are approximate and may differ at checkout. “Search” links are non-affiliate and provided for convenience only.