AMD Radeon RX 6700 XT vs AMD Radeon RX 7900 GRE Comparison

Head-to-Head Benchmarks

The benchmark data is unambiguous: the AMD Radeon RX 7900 GRE wins every single recorded head-to-head comparison against the AMD Radeon RX 6700 XT. Across ten tests spanning DirectX versions, compute workloads, and general GPU tasks, the 7900 GRE takes all 10 wins, with the 6700 XT recording zero.

The most dramatic gap appears in Geekbench OpenCL, where the 7900 GRE scores 175,758 against 44,152 for the 6700 XT. That is a 298.1% delta, meaning the newer card delivers nearly triple the raw compute performance in this synthetic workload. This is the kind of margin that matters for GPU compute tasks like rendering or scientific processing, where the 6700 XT would struggle to keep pace.

In 3DMark Steel Nomad DX12, the 7900 GRE posts 4,814 versus 2,435, a 97.7% improvement. This is a near-doubling of performance in a modern DirectX 12 gaming scenario. The delta is so large that the 6700 XT is effectively in a different performance class here, not just a minor step behind.

PassMark DirectX 11 shows a similar story: 300 for the 7900 GRE against 173 for the 6700 XT, a 73.4% lead. DirectX 11 remains relevant for many older titles and compatibility-heavy workloads, so this is not just a theoretical advantage. The 7900 GRE also wins DirectX 9 by 28.1% (310 vs 242) and DirectX 12 by 39% (107 vs 77). The latter is interesting because both cards support DirectX 12 Ultimate (12_2), yet the newer architecture extracts significantly more performance from the same API version.

Compute-oriented tests reinforce the pattern. PassMark GPU Compute gives the 7900 GRE 15,016 against 9,336, a 60.8% advantage. PassMark G3D shows 27,089 versus 19,786, a 36.9% lead. Even the 2D test, which is less dependent on raw shading power, goes to the 7900 GRE by 24.1% (1,180 vs 951).

The smallest margin is in Geekbench Vulkan, where the 7900 GRE scores 99,850 against 93,500, a 6.8% win. Vulkan tends to scale well across architectures, so the gap here is modest compared to other tests. Still, it is a win, and it shows that even in the most favorable scenario for the older card, the 7900 GRE comes out ahead.

Overall average benchmark scores tell the same tale: the 7900 GRE averages 32,456 across all recorded tests, while the 6700 XT averages 27,425. The 7900 GRE sits at the 77th percentile of all GPUs in the database, while the 6700 XT sits at the 72nd. The delta in average score is roughly 18.3%, which is a solid generational step, though the individual test deltas range from under 7% to nearly 300%. That spread matters: in some workloads the 6700 XT is competitive, in others it is utterly outclassed.

Architecture Differences

The two cards come from different generations and different process nodes. The RX 7900 GRE uses the Navi 31 chip, built on RDNA 3.0 architecture and a 5 nm process at TSMC. The RX 6700 XT uses Navi 22, built on RDNA 2.0 and a 7 nm process, also at TSMC. The node shrink is significant: the 7900 GRE packs 57,700 million transistors on a 529 mm² die, giving a transistor density of 109.1 million per square millimeter. The 6700 XT has 17,200 million transistors on a 335 mm² die, at 51.3 million per square millimeter. That density difference is a direct result of the smaller process node.

Core counts are dramatically different. The 7900 GRE has 5,120 shading units, 320 texture mapping units, and 160 ROPs. The 6700 XT has 2,560 shading units, 160 TMUs, and 64 ROPs. In every category, the 7900 GRE doubles or more than doubles the older card. Ray tracing cores follow the same pattern: 80 on the 7900 GRE versus 40 on the 6700 XT. Neither card has tensor cores, so AI acceleration relies on the same general-purpose compute path.

Clock speeds tell a counterintuitive story. The 6700 XT runs higher clocks: 2,321 MHz base, 2,581 MHz boost, and 2,424 MHz game clock. The 7900 GRE runs lower: 1,287 MHz base, 2,245 MHz boost, and 1,880 MHz game clock. Despite lower clocks, the 7900 GRE wins everywhere because its massive core count more than compensates. The pixel rate is 359.2 GPixel/s versus 165.2 GPixel/s, and the texture rate is 718.4 GTexel/s versus 413.0 GTexel/s. FP32 performance is 45.98 TFLOPS against 13.21 TFLOPS, a 3.5x gap in raw floating-point throughput.

Memory is another major differentiator. The 7900 GRE has 16 GB of GDDR6 on a 256-bit bus, delivering 576.0 GB/s of bandwidth. The 6700 XT has 12 GB of GDDR6 on a 192-bit bus, at 384.0 GB/s. Memory clocks also differ: 2,250 MHz (18 Gbps effective) on the 7900 GRE versus 2,000 MHz (16 Gbps effective) on the 6700 XT. The extra 4 GB and 192 GB/s of bandwidth give the 7900 GRE more headroom for high-resolution textures and larger datasets.

Power and physical specs differ as well. The 7900 GRE has a 260 W TDP and requires a 600 W suggested PSU, while the 6700 XT has a 230 W TDP and a 550 W suggested PSU. Both are dual-slot cards, but the 7900 GRE is longer at 276 mm versus 267 mm, and wider at 51 mm versus 40 mm. Power connectors differ: the 7900 GRE uses 2x 8-pin, while the 6700 XT uses 1x 6-pin plus 1x 8-pin. Display outputs also diverge: the 7900 GRE offers 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C, while the 6700 XT offers 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Where Each One Wins

The 7900 GRE wins in every recorded benchmark, so the question is not whether it wins, but by how much. The largest wins are in compute-heavy workloads. The Geekbench OpenCL result (298.1% lead) and PassMark GPU Compute (60.8% lead) show that the 7900 GRE is the clear choice for any task that stresses raw throughput: rendering, video encoding, physics simulations, or machine learning inference. The 45.98 TFLOPS FP32 figure versus 13.21 TFLOPS means the newer card has more than three times the theoretical compute ceiling.

For gaming, the 3DMark Steel Nomad DX12 result (97.7% lead) is the strongest indicator. This is a modern, demanding DirectX 12 test, and the 7900 GRE nearly doubles the 6700 XT. DirectX 11 and DirectX 9 results show similar advantages at 73.4% and 28.1% respectively, meaning the 7900 GRE also handles older titles better. The DirectX 12 result is a 39% lead, which is smaller but still substantial.

The 6700 XT has no wins in the recorded data. Its best relative showing is in Geekbench Vulkan, where it trails by only 6.8%. That would be the closest thing to a use case for the older card: if you are running a Vulkan-centric workload, the gap narrows considerably. But even then, the 7900 GRE wins.

The 6700 XT does have advantages in physical characteristics. It is shorter (267 mm vs 276 mm) and thinner (40 mm vs 51 mm), which makes it easier to fit in compact cases. It also draws less power (230 W vs 260 W TDP) and requires a smaller PSU (550 W vs 600 W). For a builder with a tight case or an older power supply, those differences matter. The 6700 XT also has three DisplayPort 1.4a outputs, which is one more than the 7900 GRE's two DisplayPort 2.1 outputs, though the 7900 GRE adds a USB Type-C port.

The Verdict

The data is clear: the AMD Radeon RX 7900 GRE is the superior GPU in every recorded benchmark. If you are choosing between these two, the 7900 GRE delivers better performance across DirectX 9 through 12, Vulkan, OpenCL, and general compute tasks. The 298.1% lead in Geekbench OpenCL and 97.7% lead in 3DMark Steel Nomad are not marginal differences; they represent a full performance tier gap.

However, the verdict is not purely about benchmark scores. The 6700 XT is end-of-life, while the 7900 GRE is active production. The 6700 XT has a lower TDP and smaller physical footprint, which could make sense for a compact build or a system with a modest PSU. But if you are optimizing for performance, the 7900 GRE wins outright.

The 7900 GRE also has more memory (16 GB vs 12 GB) and higher bandwidth (576.0 GB/s vs 384.0 GB/s), which future-proofs it for larger textures and higher resolutions. The 6700 XT's higher base and boost clocks are not enough to offset its lower core counts and smaller memory subsystem.

Who should pick the 6700 XT? Someone building in a very tight case, or someone with a 550 W PSU and no willingness to upgrade. The 7900 GRE requires 2x 8-pin power connectors and a 600 W PSU, so power delivery is a real constraint. But for anyone who can accommodate that, the 7900 GRE is the obvious choice.

Who should pick the 7900 GRE? Anyone who wants the best performance in this comparison, especially for compute-heavy workloads or modern DirectX 12 gaming. The 77th percentile ranking versus the 72nd percentile for the 6700 XT confirms that the 7900 GRE sits higher in the overall GPU hierarchy. There is no recorded scenario where the 6700 XT wins, so the recommendation is straightforward.

FAQ

Q: How much faster is the RX 7900 GRE in 3DMark Steel Nomad DX12?

A: The RX 7900 GRE scores 4,814, while the RX 6700 XT scores 2,435. That is a 97.7% improvement, nearly double the performance.

Q: Which card has better compute performance?

A: The RX 7900 GRE. In Geekbench OpenCL it scores 175,758 versus 44,152 for the RX 6700 XT, a 298.1% lead. PassMark GPU Compute also favors the 7900 GRE at 15,016 versus 9,336, a 60.8% advantage.

Q: Do both cards support the same DirectX version?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. However, the 7900 GRE still wins DirectX 12 benchmarks by 39% (107 vs 77).

Q: What is the memory difference between the two cards?

A: The RX 7900 GRE has 16 GB of GDDR6 on a 256-bit bus with 576.0 GB/s bandwidth. The RX 6700 XT has 12 GB of GDDR6 on a 192-bit bus with 384.0 GB/s bandwidth.

Q: Which card has more ray tracing cores?

A: The RX 7900 GRE has 80 ray tracing cores, double the 40 on the RX 6700 XT.

Q: Is the RX 6700 XT still in production?

A: No, the RX 6700 XT is marked as end-of-life. The RX 7900 GRE is still in active production.

Specification Differences

| Specification | AMD Radeon RX 7900 GRE | AMD Radeon RX 6700 XT |

|---|---|---|

| Process Node | 5 nm | 7 nm |

| Transistors | 57,700 million | 17,200 million |

| Die Size | 529 mm² | 335 mm² |

| Transistor Density | 109.1M / mm² | 51.3M / mm² |

| Base Clock | 1,287 MHz | 2,321 MHz |

| Boost Clock | 2,245 MHz | 2,581 MHz |

| Game Clock | 1,880 MHz | 2,424 MHz |

| Memory Clock | 2,250 MHz (18 Gbps effective) | 2,000 MHz (16 Gbps effective) |

| Memory Size | 16 GB | 12 GB |

| Memory Bus Width | 256 bit | 192 bit |

| Memory Bandwidth | 576.0 GB/s | 384.0 GB/s |

| Shading Units | 5,120 | 2,560 |

| TMUs | 320 | 160 |

| ROPs | 160 | 64 |

| Ray Tracing Cores | 80 | 40 |

| Pixel Rate | 359.2 GPixel/s | 165.2 GPixel/s |

| Texture Rate | 718.4 GTexel/s | 413.0 GTexel/s |

| FP32 Performance | 45.98 TFLOPS | 13.21 TFLOPS |

| FP16 Performance | 91.96 TFLOPS (2:1) | 26.43 TFLOPS (2:1) |

| TDP | 260 W | 230 W |

| Suggested PSU | 600 W | 550 W |

| Power Connectors | 2x 8-pin | 1x 6-pin + 1x 8-pin |

| Length | 276 mm (10.9 inches) | 267 mm (10.5 inches) |

| Width | 51 mm (2 inches) | 40 mm (1.6 inches) |

| Display Outputs | 1x HDMI 2.1a, 2x DisplayPort 2.1, 1x USB Type-C | 1x HDMI 2.1, 3x DisplayPort 1.4a |

| Production Status | Active | End-of-life |

| Release Date | 2023-07-26 | 2021-03-02 |

| Launch MSRP | 549 USD | 479 USD |