RX 7800 XT vs RTX 4070 Super: 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 RTX 4070 Super leads the RX 7800 XT by about 7% — a small gap. The RX 7800 XT has more VRAM (16GB vs 12GB), which helps at high resolutions and in VRAM-hungry titles. The RTX 4070 Super adds NVIDIA DLSS and stronger ray tracing, while the RX 7800 XT typically leans on raw rasterisation value.
| RX 7800 XT | RTX 4070 Super | |
|---|---|---|
| Performance index | 60/100 | 64/100 |
| VRAM | 16GB | 12GB |
| Board power (TBP) | 263W | 220W |
| Maker PSU guidance | 700W | 650W |
| Our starting PSU class | 750W | 750W |
| Power connector | dual 8-pin | 16-pin 12VHPWR |
| Generation | RX 7000 | RTX 40 |
Relative gaming index — an estimate of typical performance. Real-world gaps vary by game, resolution and settings.
Which should you buy?
Buy the RTX 4070 Super if you want the higher frame rate and can find it at a fair price. Choose the RX 7800 XT if it is clearly cheaper and its 12GB+ 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 7800 XT PSU · RTX 4070 Super PSU.
RX 7800 XT vs RTX 4070 Super at each resolution
| Resolution | RX 7800 XT | RTX 4070 Super |
|---|---|---|
| 1080p | Excellent | Excellent |
| 1440p | Great (16 short of Excellent) | Great (12 short of Excellent) |
| 4K | Playable (4 short of Good) | Good (12 short of Great) |
The 4-point gap (60 vs 64) changes the verdict at 4K: that is where the RTX 4070 Super earns its place. At 1080p and 1440p both get the same rating, so paying for the faster card buys headroom rather than a different experience there. The RX 7800 XT also carries 4GB more memory (16GB vs 12GB).
Power, PSU and efficiency
Reference board power is 263W for the RX 7800 XT and 220W for the RTX 4070 Super, a 43W difference. Per 100W that works out to 22.8 index points for the RX 7800 XT and 29.1 for the RTX 4070 Super, so the RTX 4070 Super does more per watt. An existing 650W supply meets the maker guidance for the RTX 4070 Super but not for the RX 7800 XT (700W). Full sizing: RX 7800 XT PSU · RTX 4070 Super 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 40 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 7800 XT better than the RTX 4070 Super?
On our relative index the RTX 4070 Super is about 7% ahead of the RX 7800 XT. The RX 7800 XT has more VRAM (16GB vs 12GB), 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 7800 XT or the RTX 4070 Super?
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 7800 XT and RTX 4070 Super need different power supplies?
The RX 7800 XT's maker lists a 700W supply and the RTX 4070 Super's lists 650W; our starting classes are 750W and 750W. If you might move to the RX 7800 XT later, size for its 700W now. The RTX 4070 Super can also take a PCIe Gen 5 (12V-2x6) cable; see the connector guide.
Make sure your CPU can keep up with either card using the Bottleneck Estimator, or compare more cards in the GPU comparison hub.