Radeon RX 6400 vs Radeon RX 6600 XT
The Radeon RX 6600 XT is dramatically faster than the Radeon RX 6400, leading by roughly 200% in our performance index. It is also the stronger value pick here, so it's the easy recommendation if your budget allows.
Market Value Leader
Radeon RX 6600 XT is the clear winner, offering 46.4% better value than Radeon RX 6400.
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Comparable or lower specs
Radeon RX 6600 XT vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 6600 XT vs Radeon RX 6400
The Radeon RX 6600 XT is dramatically faster, around 200% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the Radeon RX 6600 XT is comfortable at 1080p, while the Radeon RX 6400 is better matched to entry-level 1080p. The Radeon RX 6600 XT packs 2,048 stream processors versus 768 on the Radeon RX 6400. The Radeon RX 6600 XT also has more RT cores (32 vs 12), strengthening its ray-tracing and AI-upscaling performance.
Price & Value
Right now the Radeon RX 6400 starts at $253 EUR against $519 EUR for the Radeon RX 6600 XT. Because it's both faster and competitively priced, the Radeon RX 6600 XT wins on performance-per-dollar by about 46%. The Radeon RX 6400 still sits about $94 EUR above its $159 EUR MSRP. The Radeon RX 6600 XT still sits about $140 EUR above its $379 EUR MSRP.
Power & Efficiency
The Radeon RX 6400 draws just 53W versus 160W for the Radeon RX 6600 XT, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom.
VRAM & Future-Proofing
With 8GB against 4GB, the Radeon RX 6600 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 6600 XT's memory is also faster — 256 GB/s versus 128 GB/s (128-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 6600 XT?
The Radeon RX 6600 XT is the all-round winner here — it's faster and the better value, so buy it if it fits your budget. Only consider the Radeon RX 6400 if you find it at a steep discount.
Frequently Asked Questions
Is the Radeon RX 6600 XT better than the Radeon RX 6400?
Which is better for 4K gaming, the Radeon RX 6400 or the Radeon RX 6600 XT?
Is the Radeon RX 6600 XT worth the extra $266 EUR over the Radeon RX 6400?
Does the Radeon RX 6600 XT have enough VRAM advantage to matter?
Which is better for ray tracing, the Radeon RX 6600 XT or the Radeon RX 6400?
Which should you buy: Radeon RX 6400 or Radeon RX 6600 XT?
Technical Specifications Comparison
Architecture & Cores
| Specification | Radeon RX 6400 | Radeon RX 6600 XT |
|---|---|---|
| Architecture | RDNA 2 | RDNA 2 |
| Process Node | TSMC N6 | TSMC N7 |
| CUDA Cores (Stream Processors / Stream Processors) | 768 | 2,048✓ |
| Ray Tracing Cores | 12 | 32✓ |
Clock Speeds
| Specification | Radeon RX 6400 | Radeon RX 6600 XT |
|---|---|---|
| Base Clock | 1,923 MHz | 1,968 MHz✓ |
| Boost Clock | 2,321 MHz | 2,589 MHz✓ |
Memory
| Specification | Radeon RX 6400 | Radeon RX 6600 XT |
|---|---|---|
| VRAM Capacity | 4 GB | 8 GB✓ |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 64-bit | 128-bit✓ |
| Memory Speed | 16 Gbps | 16 Gbps |
| Bandwidth | 128 GB/s | 256 GB/s✓ |
Connectivity & Power
| Specification | Radeon RX 6400 | Radeon RX 6600 XT |
|---|---|---|
| Interface | PCIe 4.0 x4 | PCIe 4.0 x8 |
| TDP | 53 W✓ | 160 W |
| Power Connectors | None | 1x 8-pin |
| Released | Jan 2022 | Jul 2021 |