AMD Radeon RX 6900 XT vs AMD Radeon VII Comparison

Head-to-Head Benchmarks

The benchmark data is unambiguous: the AMD Radeon RX 6900 XT wins every recorded head-to-head comparison against the AMD Radeon VII. Across four tests, the RX 6900 XT posts a clean sweep, with the Radeon VII never taking a single victory. The largest margin comes in Geekbench Metal, where the RX 6900 XT scores 177,021 against the Radeon VII's 77,975, a 56% difference. That is the widest gap in the entire comparison, and it reflects a fundamental shift in how the newer architecture handles compute workloads.

The Geekbench OpenCL results tell a similar story. The RX 6900 XT scores 187,673, while the Radeon VII manages 91,947, putting the newer card 51% ahead. The gap narrows somewhat in Geekbench Vulkan, where the RX 6900 XT scores 148,525 versus 91,788 for the Radeon VII, a 38.2% advantage. Even the 3DMark Steel Nomad DX12 test, which is more of a modern gaming workload, shows the RX 6900 XT at 4,079 versus 2,304 for the Radeon VII, a 43.5% lead.

Looking at the average benchmark scores across all recorded tests, the Radeon VII actually holds a higher aggregate figure at 66,004, compared to the RX 6900 XT's 50,951. However, that average includes a much smaller benchmark set for the Radeon VII, which only has four recorded tests. The RX 6900 XT has eleven tests in the database, including several Passmark entries that pull its average down. The head-to-head tests, which use identical workloads for both cards, are the more reliable comparison, and there the RX 6900 XT is consistently and substantially ahead.

The percentile rankings show both cards in the upper tier of all GPUs. The Radeon VII sits at the 90th percentile, while the RX 6900 XT is at the 86th percentile. That seems counterintuitive given the head-to-head results, but it reflects the broader benchmark pool where the Radeon VII's limited test set skews its standing. The nearest rivals for each card help contextualize the differences: the Radeon VII sits within 3.4% of cards like the NVIDIA Tesla T4, Tesla P40, AMD Radeon Pro WX 9100, and NVIDIA CMP 30HX. The RX 6900 XT, meanwhile, is within 2.4% of the NVIDIA CMP 50HX, AMD Radeon RX Vega 64, NVIDIA GeForce RTX 5070 Ti, and Intel Arc A550M. The RX 6900 XT's nearest rivals are generally more modern or higher-end parts, which aligns with its superior head-to-head performance.

Where Each One Wins

The RX 6900 XT wins every category where both cards have recorded data. In raw compute, the Geekbench OpenCL and Vulkan results show a clear advantage for the newer architecture. The 51% OpenCL lead indicates significantly better general-purpose compute throughput, while the 38.2% Vulkan lead suggests that graphics and compute workloads that use Vulkan will see a substantial performance uplift. The Geekbench Metal score, which is relevant for macOS or other Metal-based environments, shows an even larger 56% gap, indicating that the RX 6900 XT is far better suited to Metal-accelerated tasks.

For gaming, the 3DMark Steel Nomad DX12 result is the key indicator. The RX 6900 XT's 43.5% lead in this modern DirectX 12 workload suggests that it will deliver noticeably higher frame rates in contemporary games. The Radeon VII, while still a capable card, is clearly outclassed in this scenario. The Radeon VII's only potential advantage lies in its HBM2 memory, which offers 1.02 TB/s of bandwidth compared to the RX 6900 XT's 512.0 GB/s. However, the benchmark data does not show this bandwidth advantage translating into any measured performance win, so in practice it does not help the older card.

The Passmark results for the RX 6900 XT, which are not available for the Radeon VII, show a mixed picture across different DirectX versions. The DirectX 11 score of 279 is the highest of its Passmark DirectX entries, while DirectX 9 scores 268, DirectX 10 scores 167, and DirectX 12 scores 113. The G3D score of 26,732 and GPU compute score of 14,547 round out the picture. Without corresponding Radeon VII data, these numbers cannot be directly compared, but they do indicate that the RX 6900 XT maintains solid performance across older API generations as well.

Architecture Differences

The two cards come from completely different architectural lineages. The Radeon VII uses the Vega 20 chip and GCN 5.1 architecture, while the RX 6900 XT uses the Navi 21 chip and RDNA 2.0 architecture. The process node is the same at 7 nm, with both cards fabricated by TSMC, but the similarities end there. The Radeon VII packs 13,230 million transistors on a 331 mm² die, giving a transistor density of 40.0M per mm². The RX 6900 XT is a much larger chip, with 26,800 million transistors on a 520 mm² die, achieving a density of 51.5M per mm². That higher density and larger transistor budget translate into more compute resources across the board.

The Radeon VII has 3,840 shading units, 240 texture mapping units, and 64 raster output units. The RX 6900 XT has 5,120 shading units, 320 TMUs, and 128 ROPs. The newer card also adds 80 ray tracing cores, which the Radeon VII lacks entirely. The pixel rate for the RX 6900 XT is 288.0 GPixel/s versus 112.0 GPixel/s for the Radeon VII, and the texture rate is 720.0 GTexel/s versus 420.0 GTexel/s. The FP32 throughput is 23.04 TFLOPS for the RX 6900 XT versus 13.44 TFLOPS for the Radeon VII, and FP16 throughput is 46.08 TFLOPS versus 26.88 TFLOPS. These are across-the-board increases, not just in one or two areas.

Memory is where the two cards diverge most dramatically. The Radeon VII uses 16 GB of HBM2 on a 4096-bit bus, delivering 1.02 TB/s of bandwidth. The RX 6900 XT uses 16 GB of GDDR6 on a 256-bit bus, delivering 512.0 GB/s. The Radeon VII's bandwidth is exactly double that of the RX 6900 XT, which is a notable advantage for memory-heavy workloads. However, the newer card's much higher compute throughput and larger L2 cache (implied by the architecture, though not specified in the data) seem to compensate in practice. The Radeon VII's memory runs at 1000 MHz with 2 Gbps effective speed, while the RX 6900 XT's memory runs at 2000 MHz with 16 Gbps effective speed.

Clock speeds also favor the RX 6900 XT. Its base clock is 1825 MHz with a boost clock of 2250 MHz, plus a game clock of 2015 MHz. The Radeon VII has a base clock of 1400 MHz and a boost clock of 1750 MHz. That is a significant clock advantage for the newer card, which helps explain why it outperforms the Radeon VII despite having less memory bandwidth. The Radeon VII draws 295 W of power with a 600 W suggested PSU, while the RX 6900 XT draws 300 W with a 700 W suggested PSU. The physical dimensions differ as well: the Radeon VII is 280 mm long, 125 mm tall, and 40 mm wide, while the RX 6900 XT is 267 mm long, 120 mm tall, and 50 mm wide. The Radeon VII is a dual-slot card, while the RX 6900 XT is triple-slot.

The Verdict

The RX 6900 XT is the clear winner in every benchmark category where both cards have recorded data. If the choice is between these two, the data points decisively to the newer card for all workloads: gaming, compute, and Metal-accelerated tasks. The Radeon VII's memory bandwidth advantage does not translate into any measured performance win, so it is a theoretical benefit that does not show up in practice.

The RX 6900 XT also has a higher launch MSRP of 999 USD, compared to the Radeon VII's 699 USD. That price difference reflects the newer card's superior performance and feature set. However, both cards are now end-of-life, so actual market pricing will vary. The RX 6900 XT offers better ray tracing support with 80 RT cores, a more modern DirectX 12 Ultimate API, and a higher Vulkan version at 1.4 versus 1.3. The PCIe interface is also newer, with PCIe 4.0 x16 versus PCIe 3.0 x16.

The Radeon VII does have some advantages worth noting. Its smaller die and lower power draw at 295 W versus 300 W make it slightly more efficient in absolute power consumption. The dual-slot form factor is easier to fit in smaller cases, and the card is 13 mm shorter than the RX 6900 XT. The display outputs include 1x HDMI 2.0b and 3x DisplayPort 1.4a, while the RX 6900 XT offers 1x HDMI 2.1, 2x DisplayPort 1.4a, and 1x USB Type-C. The HDMI 2.1 port on the newer card supports higher resolutions and refresh rates on modern displays.

For a builder choosing between these two cards today, the RX 6900 XT is the obvious pick for gaming and general compute. The 43.5% lead in 3DMark Steel Nomad and the 51% lead in OpenCL are decisive. The Radeon VII only makes sense if the HBM2 memory bandwidth is critical for a specific workload, but the recorded data shows no such scenario where it wins. The RX 6900 XT is the more capable card in every measured test.

FAQ

Q: Which card has a higher average benchmark score?

A: The Radeon VII has an average benchmark score of 66,004, while the RX 6900 XT has an average of 50,951. However, the Radeon VII has only four recorded benchmarks, while the RX 6900 XT has eleven, so the averages are not directly comparable.

Q: What is the biggest performance gap between the two cards?

A: The largest gap is in Geekbench Metal, where the RX 6900 XT scores 177,021 versus the Radeon VII's 77,975, a 56% difference.

Q: Does the Radeon VII have more memory bandwidth than the RX 6900 XT?

A: Yes. The Radeon VII has 1.02 TB/s of bandwidth from its HBM2 memory on a 4096-bit bus, while the RX 6900 XT has 512.0 GB/s from GDDR6 on a 256-bit bus.

Q: Which card supports ray tracing?

A: The RX 6900 XT has 80 ray tracing cores. The Radeon VII has no ray tracing cores and does not support this feature.

Q: What is the DirectX version difference between the two cards?

A: The RX 6900 XT supports DirectX 12 Ultimate (12_2), while the Radeon VII supports DirectX 12 (12_1).

Q: How do the cards compare in terms of physical size?

A: The Radeon VII is 280 mm long, 125 mm tall, and 40 mm wide, using a dual-slot design. The RX 6900 XT is 267 mm long, 120 mm tall, and 50 mm wide, using a triple-slot design.

Specification Differences

| Specification | AMD Radeon VII | AMD Radeon RX 6900 XT |

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

| Chip | Vega 20 | Navi 21 |

| Architecture | GCN 5.1 | RDNA 2.0 |

| Transistors | 13,230 million | 26,800 million |

| Die Size | 331 mm² | 520 mm² |

| Transistor Density | 40.0M / mm² | 51.5M / mm² |

| Base Clock | 1400 MHz | 1825 MHz |

| Boost Clock | 1750 MHz | 2250 MHz |

| Game Clock | N/A | 2015 MHz |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus Width | 4096 bit | 256 bit |

| Memory Bandwidth | 1.02 TB/s | 512.0 GB/s |

| Shading Units | 3840 | 5120 |

| TMUs | 240 | 320 |

| ROPs | 64 | 128 |

| RT Cores | N/A | 80 |

| Pixel Rate | 112.0 GPixel/s | 288.0 GPixel/s |

| Texture Rate | 420.0 GTexel/s | 720.0 GTexel/s |

| FP32 | 13.44 TFLOPS | 23.04 TFLOPS |

| FP16 | 26.88 TFLOPS (2:1) | 46.08 TFLOPS (2:1) |

| TDP | 295 W | 300 W |

| Slot Width | Dual-slot | Triple-slot |

| Suggested PSU | 600 W | 700 W |

| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |

| Display Outputs | 1x HDMI 2.0b, 3x DisplayPort 1.4a | 1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C |

| DirectX | 12 (12_1) | 12 Ultimate (12_2) |

| Vulkan | 1.3 | 1.4 |

| Length | 280 mm | 267 mm |

| Height | 125 mm | 120 mm |

| Width | 40 mm | 50 mm |

| Release Date | 2019-02-06 | 2020-10-27 |

| Launch MSRP | 699 USD | 999 USD |