AMD Radeon RX 6600 XT vs NVIDIA GeForce RTX 2080 SUPER Comparison

The AMD Radeon RX 6600 XT and NVIDIA GeForce RTX 2080 SUPER are both end-of-life graphics cards from different architectural generations, and the benchmark data shows a decisive overall victory for the NVIDIA card. Across ten head-to-head tests, the RTX 2080 SUPER wins every single matchup, though the margin varies dramatically from a near-tie in legacy APIs to a commanding lead in modern compute workloads. The two cards sit at nearly identical average benchmark scores—24,442 for the AMD card versus 24,170 for the NVIDIA card—placing them within 1.1% of each other overall, yet the distribution of wins tells a more nuanced story about where each card excels.

Head-to-Head Benchmarks

The most striking result in the head-to-head comparison is the Geekbench Vulkan test, where the RTX 2080 SUPER scores 111,284 against the RX 6600 XT’s 72,417. That is a 34.9% lead for NVIDIA, the largest delta in the entire suite. This is not a marginal advantage; it is a generational gap in low-level API performance that suggests the NVIDIA card handles Vulkan workloads with substantially more efficiency. The OpenCL result follows a similar pattern, with the RTX 2080 SUPER posting 99,226 versus 80,503 for the AMD card, a difference of 18.9%. These compute-oriented tests highlight where the Turing architecture’s larger shader array and dedicated tensor cores pay off.

The 3DMark Steel Nomad DX12 test tells a closer story. The RTX 2080 SUPER scores 1,882, while the RX 6600 XT trails at 1,804, a margin of only 4.1%. This is the modern gaming workload benchmark, and the results indicate that while NVIDIA still wins, the RX 6600 XT is far more competitive in DirectX 12 than in Vulkan or OpenCL. The PassMark G3D test shows a similar but larger gap: 19,490 for NVIDIA versus 16,461 for AMD, a 15.5% difference. This aggregate DirectX gaming score reinforces the idea that the RTX 2080 SUPER holds a solid but not overwhelming lead in traditional rasterization.

Legacy API performance shows the narrowest margins. In PassMark DirectX 11, the RTX 2080 SUPER scores 165 against 163 for the RX 6600 XT, a difference of just 1.2%. The PassMark G2D test is even closer, with NVIDIA at 920 and AMD at 912, a 0.9% gap. These results suggest that for older DirectX 11 titles or 2D workloads, the two cards are effectively interchangeable. The DirectX 9 test gives NVIDIA a 14.5% lead (227 versus 194), while DirectX 10 shows a 22.1% advantage (140 versus 109). The DirectX 12 PassMark test shows an 18.7% gap in favor of NVIDIA (75 versus 61), and the GPU Compute test adds a 9.3% NVIDIA lead (8,290 versus 7,520). In every category, NVIDIA wins, but the competitive landscape shifts depending on the API generation.

Where Each One Wins

The data is unambiguous: the RTX 2080 SUPER wins all ten head-to-head benchmarks. However, the magnitude of those wins varies enough to define distinct use cases. For users prioritizing Vulkan performance—whether in Linux gaming, emulation, or specific Vulkan-native titles—the RTX 2080 SUPER is the clear choice, with its 34.9% advantage being the single largest differentiator in this comparison. OpenCL compute workloads also strongly favor NVIDIA, making the RTX 2080 SUPER better suited for GPU-accelerated rendering, physics simulation, or machine learning inference tasks that rely on OpenCL.

The RX 6600 XT, despite losing every matchup, has its own strengths when viewed through the lens of efficiency and physical footprint. It uses a 7 nm process node from TSMC versus the 12 nm node of the RTX 2080 SUPER, and its transistor density of 46.7 million per square millimeter is nearly double NVIDIA’s 25.0 million. The card draws 160 W of power versus 250 W for the NVIDIA card, and its suggested PSU is 450 W compared to 600 W. For compact builds, the RX 6600 XT measures 190 mm in length versus 267 mm for the RTX 2080 SUPER, making it substantially easier to fit into smaller cases. The RX 6600 XT also uses a single 8-pin power connector, while the RTX 2080 SUPER requires both a 6-pin and an 8-pin.

In gaming workloads, the RX 6600 XT is closest to parity in DirectX 11, where its 1.2% deficit is negligible. In DirectX 12, the 4.1% gap in 3DMark Steel Nomad suggests that modern games running on DX12 will see only slightly lower frame rates on the AMD card. The PassMark G3D result, however, shows a 15.5% gap, indicating that across a broad spectrum of DirectX titles, the NVIDIA card maintains a more consistent advantage. The RTX 2080 SUPER is the stronger choice for any user who values raw performance above all else, while the RX 6600 XT is the more pragmatic option for users constrained by power budgets, case size, or PSU capacity.

Architecture Differences

The architectural divide between these two cards is fundamental. The RX 6600 XT uses the Navi 23 chip built on RDNA 2.0, fabricated on TSMC’s 7 nm process. It packs 11,060 million transistors into a 237 mm² die, achieving a transistor density of 46.7 million per square millimeter. The RTX 2080 SUPER uses the TU104 chip on Turing architecture, built on a 12 nm process with 13,600 million transistors spread across a much larger 545 mm² die, yielding just 25.0 million transistors per square millimeter. The NVIDIA card has more raw hardware—3,072 shading units versus 2,048, 192 texture mapping units versus 128, and 48 ray tracing cores versus 32—but the AMD card operates at much higher clock speeds.

The RX 6600 XT boosts to 2,589 MHz and has a game clock of 2,359 MHz, while the RTX 2080 SUPER boosts to just 1,815 MHz. This clock advantage helps the AMD card overcome its smaller shader count, but the NVIDIA card still has higher peak FP32 throughput at 11.15 TFLOPS versus 10.60 TFLOPS. Memory is another major differentiator: both cards have 8 GB of GDDR6, but the RTX 2080 SUPER uses a 256-bit bus with 495.9 GB/s of bandwidth, while the RX 6600 XT is limited to a 128-bit bus and 256.0 GB/s. That 93.8% bandwidth advantage for NVIDIA is critical in high-resolution gaming and compute workloads. The RTX 2080 SUPER also features 384 tensor cores, which the RX 6600 XT lacks entirely, explaining its lead in compute benchmarks.

The PCIe interface differs as well. The RX 6600 XT uses PCIe 4.0 x8, while the RTX 2080 SUPER uses PCIe 3.0 x16. In practice, the older card’s wider interface partially compensates for its older standard. The NVIDIA card also offers a USB Type-C output alongside its 1x HDMI 2.0 and 3x DisplayPort 1.4a, whereas the AMD card provides 1x HDMI 2.1 and 3x DisplayPort 1.4a. The RX 6600 XT’s HDMI 2.1 support is a modern advantage for 4K high-refresh-rate displays, though the RTX 2080 SUPER’s USB-C output is useful for VR headsets and display adapters.

FAQ

Q: Which card has the higher average benchmark score?

A: The AMD Radeon RX 6600 XT has an average benchmark score of 24,442, while the NVIDIA GeForce RTX 2080 SUPER scores 24,170. The AMD card leads by 1.1%, though it wins none of the individual head-to-head tests.

Q: How large is the performance gap in Vulkan workloads?

A: In the Geekbench Vulkan test, the RTX 2080 SUPER scores 111,284 versus 72,417 for the RX 6600 XT, giving NVIDIA a 34.9% advantage. This is the largest delta in the entire benchmark suite.

Q: Are these cards comparable in power consumption?

A: No. The RX 6600 XT has a 160 W TDP and recommends a 450 W power supply, while the RTX 2080 SUPER has a 250 W TDP with a 600 W suggested PSU. The AMD card is significantly more power-efficient.

Q: What memory bandwidth does each card provide?

A: The RTX 2080 SUPER offers 495.9 GB/s over a 256-bit bus, while the RX 6600 XT provides 256.0 GB/s over a 128-bit bus. The NVIDIA card has roughly 93.8% more memory bandwidth.

Q: Which card supports ray tracing, and how do their ray tracing cores compare?

A: Both cards support ray tracing. The RTX 2080 SUPER has 48 ray tracing cores, while the RX 6600 XT has 32. The NVIDIA card also includes 384 tensor cores, which the AMD card does not have.

Q: How do the cards differ in physical size?

A: The RX 6600 XT is 190 mm long, 110 mm tall, and 40 mm wide, while the RTX 2080 SUPER is 267 mm long, 116 mm tall, and 35 mm wide. The AMD card is substantially shorter and easier to fit in compact cases.

The Verdict

The data points to the NVIDIA GeForce RTX 2080 SUPER as the outright performance winner, taking all ten head-to-head benchmarks. Its 34.9% lead in Vulkan, 18.9% lead in OpenCL, and 15.5% lead in PassMark G3D make it the superior choice for users who prioritize raw compute and modern API performance. The 3DMark Steel Nomad DX12 result shows a narrower 4.1% margin, but NVIDIA still wins where it counts for gaming. The RTX 2080 SUPER also offers more memory bandwidth, more shading units, and dedicated tensor cores, all of which contribute to its benchmark dominance.

The AMD Radeon RX 6600 XT, however, is not without merit. Its 7 nm process node delivers far better transistor density and efficiency, with a 160 W TDP versus 250 W for NVIDIA. It is shorter, lighter on power connectors, and requires a smaller PSU. For users building a compact system or upgrading a pre-existing PC with a limited power supply, the RX 6600 XT is the more practical choice. Its performance in DirectX 11 is essentially tied with the NVIDIA card, and its 4.1% deficit in 3DMark Steel Nomad suggests that modern DX12 games will run acceptably. The RX 6600 XT also supports HDMI 2.1, making it a better fit for the latest 4K displays.

The choice comes down to priorities. The RTX 2080 SUPER is the card to pick if benchmark scores and maximum frame rates are the sole criteria. The RX 6600 XT is the card to pick if power efficiency, physical footprint, and modern display connectivity matter more than the 15-35% performance deltas in compute-heavy workloads. The average benchmark scores are within 1.1% of each other, but the distribution of those scores reveals that the NVIDIA card is consistently faster where it matters most. The RX 6600 XT’s 70th percentile ranking versus the RTX 2080 SUPER’s 69th percentile confirms that these are closely matched cards overall, yet the NVIDIA card’s wins are decisive in the areas that define high-end GPU performance.