Radeon RX 6900 XT vs Radeon RX 7800 XT
The Radeon RX 6900 XT pulls ahead here — clearly quicker, about 8% ahead of the Radeon RX 7800 XT. It also wins on performance-per-dollar, making it the cleaner choice when you can afford it.
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Radeon RX 6900 XT vs Radeon RX 7800 XT: In-Depth Breakdown
Performance: Radeon RX 6900 XT vs Radeon RX 7800 XT
The Radeon RX 6900 XT is noticeably faster, around 8% ahead of the Radeon RX 7800 XT. Both cards sit in the same broad class, well suited to 1440p. The Radeon RX 6900 XT packs 5,120 stream processors versus 3,840 on the Radeon RX 7800 XT.
Price & Value
Pricing has the Radeon RX 6900 XT at $660 CAD, $20 CAD under the Radeon RX 7800 XT's $680 CAD. Because it's both faster and competitively priced, the Radeon RX 6900 XT wins on performance-per-dollar by about 11%. The Radeon RX 6900 XT is trading below its $999 CAD MSRP — a genuine deal. The Radeon RX 7800 XT still sits about $181 CAD above its $499 CAD MSRP.
Power & Efficiency
Power draw favors the Radeon RX 7800 XT (263W vs 300W), and it's the more efficient card too, so it's the easy pick if thermals or a smaller PSU matter. Its more modern RDNA 3 architecture on a TSMC N5 process is part of why it does more with each watt.
Memory & Bandwidth
The Radeon RX 7800 XT's memory is faster — 624 GB/s versus 512 GB/s — which helps feed the GPU at 4K and with heavy textures.
Generation & Longevity
The Radeon RX 7800 XT is roughly 3 years newer than the Radeon RX 6900 XT (RDNA 3 vs RDNA 2), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 6900 XT or Radeon RX 7800 XT?
The Radeon RX 6900 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 7800 XT if you find it at a steep discount.
Frequently Asked Questions
Is the Radeon RX 6900 XT better than the Radeon RX 7800 XT?
Which is better for 4K gaming, the Radeon RX 6900 XT or the Radeon RX 7800 XT?
Is the Radeon RX 7800 XT worth the extra $20 CAD over the Radeon RX 6900 XT?
Which should you buy: Radeon RX 6900 XT or Radeon RX 7800 XT?
Technical Specifications Comparison
Architecture & Cores
| Specification | Radeon RX 6900 XT | Radeon RX 7800 XT |
|---|---|---|
| Architecture | RDNA 2 | RDNA 3 |
| Process Node | TSMC N7 | TSMC N5 |
| CUDA Cores (Stream Processors / Stream Processors) | 5,120✓ | 3,840 |
| Ray Tracing Cores | 80✓ | 60 |
| Tensor / AI Cores | — | 120 |
Clock Speeds
| Specification | Radeon RX 6900 XT | Radeon RX 7800 XT |
|---|---|---|
| Base Clock | 1,825 MHz✓ | 1,800 MHz |
| Boost Clock | 2,250 MHz | 2,430 MHz✓ |
Memory
| Specification | Radeon RX 6900 XT | Radeon RX 7800 XT |
|---|---|---|
| VRAM Capacity | 16 GB | 16 GB |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 256-bit | 256-bit |
| Memory Speed | 16 Gbps | 19.5 Gbps✓ |
| Bandwidth | 512 GB/s | 624 GB/s✓ |
Connectivity & Power
| Specification | Radeon RX 6900 XT | Radeon RX 7800 XT |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| TDP | 300 W | 263 W✓ |
| Power Connectors | 2x 8-pin | 2x 8-pin |
| Released | Dec 2020 | Aug 2023 |