RX 6800 XT vs RTX 3080: Which Should You Buy?
Head-to-head on performance, VRAM, power and value for 2026.
Quick Summary · TL;DR
On our relative performance index the RX 6800 XT leads the RTX 3080 by about 11% — a moderate gap. The RX 6800 XT has more VRAM (16GB vs 10GB), which helps at high resolutions and in VRAM-hungry titles. The RTX 3080 adds NVIDIA DLSS and stronger ray tracing, while the RX 6800 XT typically leans on raw rasterisation value.
| RX 6800 XT | RTX 3080 | |
|---|---|---|
| Performance index | 62/100 | 56/100 |
| VRAM | 16GB | 10GB |
| Board power (TBP) | 300W | 320W |
| Maker PSU guidance | 750W | 750W |
| Our starting PSU class | 750W | 750W |
| Power connector | 8-pin PCIe | 8-pin PCIe |
| Generation | RX 6000 | RTX 30 |
Relative gaming index — an estimate of typical performance. Real-world gaps vary by game, resolution and settings.
Which should you buy?
Buy the RX 6800 XT if you want the higher frame rate and can find it at a fair price. Choose the RTX 3080 if it is clearly cheaper and its 10GB+ of VRAM and features cover your target resolution. For ray tracing and DLSS, the NVIDIA option has the edge; for raw rasterisation per dollar, the alternative often wins.
Power planning: RX 6800 XT PSU · RTX 3080 PSU.
RX 6800 XT vs RTX 3080 at each resolution
| Resolution | RX 6800 XT | RTX 3080 |
|---|---|---|
| 1080p | Excellent | Excellent |
| 1440p | Great (14 short of Excellent) | Good (4 short of Great) |
| 4K | Playable (2 short of Good) | Playable (8 short of Good) |
The 6-point gap (62 vs 56) changes the verdict at 1440p: that is where the RX 6800 XT earns its place. At 1080p and 4K both get the same rating, so paying for the faster card buys headroom rather than a different experience there. The RX 6800 XT also carries 6GB more memory (16GB vs 10GB).
Power, PSU and efficiency
Reference board power is 300W for the RX 6800 XT and 320W for the RTX 3080, a 20W difference. Per 100W that works out to 20.7 index points for the RX 6800 XT and 17.5 for the RTX 3080, so the RX 6800 XT does more per watt. Both makers list the same 750W supply. Full sizing: RX 6800 XT PSU · RTX 3080 PSU.
Ratings use the same index lines as our GPU resolution pages; the index is an editorial tier summary, not a benchmark. PSU figures are the makers’ reference guidance reviewed 12 September 2026.
Sources & verification
- AMD Radeon desktop graphics specifications
- NVIDIA GeForce RTX 30 Series specifications
- SpecsCalc calculation methodology and limitations
Relative indices summarize broad gaming tiers and are not a substitute for game-by-game benchmark averages. Price and driver updates can change the buying recommendation. Last reviewed September 19, 2026.
Frequently asked questions
Is the RX 6800 XT better than the RTX 3080?
On our relative index the RX 6800 XT is about 11% ahead of the RTX 3080. The RX 6800 XT has more VRAM (16GB vs 10GB), which helps at high resolutions and in VRAM-hungry titles. The smaller the gap, the more other factors like price, VRAM and features should decide it.
Which is better value, the RX 6800 XT or the RTX 3080?
Value depends on the price you can find each at. The slower card is usually the smart buy if it is meaningfully cheaper, unless you need the extra VRAM or features of the faster one.
Do the RX 6800 XT and RTX 3080 need different power supplies?
The RX 6800 XT's maker lists a 750W supply and the RTX 3080's lists 750W; our starting classes are 750W and 750W. On the makers’ own guidance, a supply that suits one suits the other.
Make sure your CPU can keep up with either card using the Bottleneck Estimator, or compare more cards in the GPU comparison hub.