GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
Market Value Leader
Market comparison is currently pending while we verify the latest benchmarks for Radeon RX 6400 and Radeon RX 7900 XT.
The Radeon RX 7900 XT is dramatically faster than the Radeon RX 6400, leading by roughly 733% in our performance index.
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Comparable or lower specs
Radeon RX 7900 XT vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 7900 XT vs Radeon RX 6400
The Radeon RX 7900 XT is dramatically faster, around 733% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 7900 XT is comfortable at 4K with upscaling and native 1440p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 7900 XT packs 5,376 stream processors versus 768 on the Radeon RX 6400.
Power & Efficiency
The Radeon RX 6400 pulls less power (53W vs 300W), so it's the easier card to cool and the lighter load on your PSU. The faster Radeon RX 7900 XT draws more overall but extracts more performance from each watt — plan for a sturdier power supply if you pick it.
VRAM & Future-Proofing
With 20GB against 4GB, the Radeon RX 7900 XT has more headroom for 4K textures and memory-hungry creative/AI tasks where the Radeon RX 6400's 4GB can fall short. The Radeon RX 7900 XT's memory is also faster — 800 GB/s versus 128 GB/s (320-bit vs 64-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Which should you buy: Radeon RX 6400 or Radeon RX 7900 XT?
The Radeon RX 7900 XT is the faster card by about 733%. With live pricing limited for this pair, base your decision on the spec differences above — particularly VRAM and power draw — and check current stock before buying.
Frequently Asked Questions
Is the Radeon RX 7900 XT better than the Radeon RX 6400?
Which is better for 4K gaming, the Radeon RX 6400 or the Radeon RX 7900 XT?
Does the Radeon RX 7900 XT have enough VRAM advantage to matter?
Technical Specifications Comparison
Architecture & Cores
| Specification | Radeon RX 6400 | Radeon RX 7900 XT |
|---|---|---|
| Architecture | RDNA 2 | RDNA 3 |
| Process Node | TSMC N6 | TSMC N5 |
| CUDA Cores (Stream Processors / Stream Processors) | 768 | 5,376✓ |
| Ray Tracing Cores | 12 | 84✓ |
| Tensor / AI Cores | — | 168 |
Clock Speeds
| Specification | Radeon RX 6400 | Radeon RX 7900 XT |
|---|---|---|
| Base Clock | 1,923 MHz✓ | 1,500 MHz |
| Boost Clock | 2,321 MHz | 2,400 MHz✓ |
Memory
| Specification | Radeon RX 6400 | Radeon RX 7900 XT |
|---|---|---|
| VRAM Capacity | 4 GB | 20 GB✓ |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 64-bit | 320-bit✓ |
| Memory Speed | 16 Gbps | 20 Gbps✓ |
| Bandwidth | 128 GB/s | 800 GB/s✓ |
Connectivity & Power
| Specification | Radeon RX 6400 | Radeon RX 7900 XT |
|---|---|---|
| Interface | PCIe 4.0 x4 | PCIe 4.0 x16 |
| TDP | 53 W✓ | 300 W |
| Power Connectors | None | 2x 8-pin |
| Released | Jan 2022 | Nov 2022 |
Related Reading
Best for: The 4K Texture Modder & Raw Power Enthusiast
Modded Skyrim and Starfield at 4K can exceed 18GB of VRAM usage. Discover why the 7900 XT's 20GB buffer is a necessity.
The 20GB Value King: AMD Radeon RX 7900 XT Review
With its massive 20GB VRAM and aggressive price cuts, the Radeon RX 7900 XT is a high-end 4K contender that refuses to age. Is it still worth it today?