AMD Radeon RX 580 vs AMD Radeon RX 6500 XT Comparison

The AMD Radeon RX 580 and AMD Radeon RX 6500 XT represent two distinct generations of AMD graphics hardware, separated by nearly five years of architectural evolution. The RX 580, built on the 14 nm Polaris 20 chip with GCN 4.0, was a mainstream powerhouse of its era. The RX 6500 XT, using the 6 nm Navi 24 chip with RDNA 2.0, was designed for a different purpose entirely. The benchmark data shows a fascinating split: the RX 6500 XT wins the majority of tests (7 out of 10), but the RX 580 delivers decisive victories in specific modern workloads. The RX 580 holds a 53rd percentile ranking among all GPUs, while the RX 6500 XT sits at the 51st percentile. Their average benchmark scores tell a similar story, with the RX 580 averaging 12,928 points against the RX 6500 XT's 11,842. This analysis breaks down exactly where each card dominates and what those results mean for different types of users.

Head-to-Head Benchmarks

The most dramatic result in this comparison comes from 3DMark Steel Nomad DX12, a test that heavily favors the older card. The RX 580 scores 1,005 points against the RX 6500 XT's 235 points, producing a staggering 327.7% advantage for the RX 580. This is not a marginal win; it is a complete rout in a modern DirectX 12 workload. The RX 580 also wins in PassMark DirectX 12, though by a much narrower margin, scoring 43 versus 38 for a 13.2% lead. In PassMark DirectX 9, the RX 580 continues its legacy API dominance with a score of 124 against 108, a 14.8% advantage.

The RX 6500 XT, however, strikes back across several compute-focused and general performance metrics. In Geekbench OpenCL, it scores 48,289 against the RX 580's 37,453, representing a 22.4% lead. The Vulkan test shows similar results, with the RX 6500 XT posting 54,724 points versus 45,173, a 17.5% advantage. PassMark GPU Compute also goes to the newer card, with scores of 4,456 versus 3,488, a 21.7% difference. The RX 6500 XT also wins the PassMark G3D test, achieving 9,608 points against 8,813, an 8.3% margin.

Legacy DirectX tests show a mixed picture. In PassMark DirectX 10, the RX 6500 XT scores 60 versus 46, winning by 23.3%. The DirectX 11 test sees the RX 6500 XT ahead with 90 points versus 60, a 33.3% margin. Even in 2D performance, the RX 6500 XT edges ahead, scoring 815 in PassMark G2D against 769, a 5.6% win. The overall scoreboard reads 7 wins for the RX 6500 XT and 3 wins for the RX 580, but the magnitude of the RX 580's Steel Nomad victory carries outsized weight for gamers.

The Verdict

The data paints a clear picture for different user profiles. The RX 6500 XT is the better all-round performer in most synthetic benchmarks, winning 70% of the head-to-head tests. Its strengths in OpenCL, Vulkan, and compute workloads make it the more versatile card for general-purpose tasks and modern API-based applications. The RX 580, however, is the undisputed champion in DirectX 12 gaming scenarios, as evidenced by its 327.7% blowout in Steel Nomad. For anyone running current AAA games that leverage DirectX 12, the RX 580 is the only rational choice based on these numbers alone.

The RX 6500 XT also holds advantages in legacy DirectX 10 and 11 titles, with margins of 23.3% and 33.3% respectively. This makes it the better card for older game libraries. Its 51st percentile ranking and average score of 11,842 place it slightly behind the RX 580's 53rd percentile and 12,928 average, but the newer card's wins come in more diverse workloads. The RX 580's nearest rival is the NVIDIA GeForce RTX 3050 Ti Mobile at 12,940 points, a 0.1% difference, while the RX 6500 XT sits closest to the NVIDIA GeForce GTX 1080 at 11,960 points, just 1% ahead. The RX 6500 XT also trails the GTX 960A by 1.3% and leads the GTX 1660 by 1.4% and the RX 7800 XT by 1.9%.

Where Each One Wins

The RX 580 is the clear winner for modern DirectX 12 gaming. Its 327.7% lead in 3DMark Steel Nomad is the single largest margin in this entire comparison, indicating that its 2,304 shading units and 256-bit memory bus provide substantial raw throughput for current graphics workloads. The card also wins in DirectX 9, maintaining a 14.8% edge that benefits older esports titles and classic games. Its 8 GB of VRAM and 256.0 GB/s memory bandwidth give it a structural advantage for texture-heavy modern games, even though those specs are not directly benchmarked here.

The RX 6500 XT wins in every other category, making it the better choice for compute tasks, productivity applications, and general desktop use. Its 22.4% lead in OpenCL and 17.5% lead in Vulkan indicate strong performance in non-gaming workloads like video encoding, rendering, and GPU-accelerated applications. The 21.7% advantage in PassMark GPU Compute reinforces this. For DirectX 10 and 11 titles, the RX 6500 XT's 23.3% and 33.3% leads make it the better option for mid-2000s to mid-2010s game libraries. Its 2D performance also edges ahead by 5.6%, which is relevant for desktop compositing and lighter workloads.

The RX 6500 XT's higher clock speeds — a 2,310 MHz base against 1,257 MHz and a 2,815 MHz boost against 1,340 MHz — contribute to its wins in compute and legacy tests. Its 90.08 GPixel/s pixel rate and 180.2 GTexel/s texture rate, while not directly benchmarked, align with its stronger performance in rasterization-heavy tests like PassMark G3D. The RX 580 counters with a higher texture rate of 193.0 GTexel/s and more shading units, which explains its dominance in the Steel Nomad DX12 test.

FAQ

Q: Which card is better for DirectX 12 gaming?

A: The AMD Radeon RX 580 is decisively better, scoring 1,005 in 3DMark Steel Nomad DX12 against the RX 6500 XT's 235, a 327.7% advantage. It also wins PassMark DirectX 12 by 13.2% with scores of 43 versus 38.

Q: Does the RX 6500 XT beat the RX 580 in any modern tests?

A: Yes, the RX 6500 XT wins Geekbench Vulkan with 54,724 points versus 45,173, a 17.5% margin, and Geekbench OpenCL with 48,289 versus 37,453, a 22.4% margin. These are modern API-based compute tests.

Q: How do the two cards compare in legacy DirectX performance?

A: The RX 6500 XT is stronger in DirectX 10 and 11, winning by 23.3% (60 vs 46) and 33.3% (90 vs 60) respectively. The RX 580 wins in DirectX 9 by 14.8% (124 vs 108).

Q: Which card has better overall compute performance?

A: The RX 6500 XT leads in PassMark GPU Compute with 4,456 points versus 3,488, a 21.7% advantage. Its FP16 throughput of 11.53 TFLOPS (2:1) also exceeds the RX 580's 6.175 TFLOPS (1:1).

Q: What are the average benchmark scores for each card?

A: The RX 580 averages 12,928 points across all benchmarks, while the RX 6500 XT averages 11,842 points. The RX 580 sits at the 53rd percentile of all GPUs, and the RX 6500 XT at the 51st.

Q: Which card offers more memory bandwidth?

A: The RX 580 has a 256-bit bus with 256.0 GB/s bandwidth, while the RX 6500 XT uses a 64-bit bus with 143.9 GB/s. The RX 580 also has 8 GB of GDDR5 memory versus 4 GB of GDDR6.

Architecture Differences

The architectural gap between these two cards is substantial. The RX 580 uses the Polaris 20 chip on a 14 nm process from GlobalFoundries, packing 5,700 million transistors into a 232 mm² die. The RX 6500 XT uses the Navi 24 chip on TSMC's 6 nm process, fitting 5,400 million transistors into just 107 mm². This makes the RX 6500 XT more than twice as dense, achieving 50.5M transistors per mm² versus the RX 580's 24.6M.

The compute topology differs significantly. The RX 580 has 2,304 shading units, 144 texture mapping units, and 32 ROPs. The RX 6500 XT has 1,024 shading units, 64 TMUs, and 32 ROPs. Despite having fewer than half the shading units, the RX 6500 XT reaches 5.765 TFLOPS FP32 performance, close to the RX 580's 6.175 TFLOPS, thanks to much higher clock speeds. The RX 6500 XT also features 16 ray accelerators, which the RX 580 lacks entirely.

Memory architecture represents one of the biggest differences. The RX 580 uses 8 GB of GDDR5 on a 256-bit bus, delivering 256.0 GB/s bandwidth. The RX 6500 XT uses 4 GB of GDDR6 on a 64-bit bus, providing only 143.9 GB/s. The RX 580's memory runs at 2000 MHz (8 Gbps effective), while the RX 6500 XT's runs at 2248 MHz (18 Gbps effective). The RX 6500 XT's smaller memory pool and narrower bus likely contribute to its poor DirectX 12 performance, despite faster memory technology.

The RX 6500 XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the RX 580 only reaches DirectX 12 (12_0) and Vulkan 1.3. Both support OpenGL 4.6. The RX 6500 XT uses a PCIe 4.0 x4 interface, whereas the RX 580 uses PCIe 3.0 x16. Power requirements differ substantially, with the RX 580 rated at 185 W TDP requiring a 450 W PSU and one 8-pin connector, while the RX 6500 XT draws only 107 W, needs a 300 W PSU, and uses a single 6-pin connector. The RX 580 was released on April 17, 2017, at a launch MSRP of 229 USD, while the RX 6500 XT launched January 18, 2022, at 199 USD. Both cards are now end-of-life products.