AMD Radeon RX 550 vs AMD Radeon RX 6500 XT Comparison

AMD Radeon RX 6500 XT vs AMD Radeon RX 550 is a generational mismatch, pitting a modern entry-level RDNA 2.0 part against a legacy Polaris-era card. The benchmark data shows a decisive victory for the newer card across every shared test, but the comparison is more nuanced than raw scores alone. Both cards occupy the low end of the GPU spectrum, yet they serve fundamentally different workloads and eras of gaming.

Where Each One Wins

The AMD Radeon RX 6500 XT wins every head-to-head benchmark in the data set, with zero victories for the RX 550. This is not a close contest; the newer card dominates across all three shared tests: 3DMark Steel Nomad DX12, Geekbench OpenCL, and Geekbench Vulkan. The RX 6500 XT's wins are not marginal either, with deltas ranging from 85% to a staggering 346%.

The RX 550's only "win" is in its legacy positioning. It is a card from the Polaris generation, designed for a time when 1080p gaming was the standard and DirectX 12 was just emerging. Its 2 GB of GDDR5 memory and 128-bit bus were adequate for the era's lighter workloads. The data shows it still holds a place in the 50th percentile of all GPUs, meaning it remains statistically average even today, but that average is anchored to older benchmarks. In contrast, the RX 6500 XT sits at the 51st percentile, barely higher, but its score distribution is heavily weighted toward modern API tests.

The RX 6500 XT is the clear choice for any current gaming or compute workload. Its 4 GB of GDDR6 memory and support for DirectX 12 Ultimate give it a foot in the door for modern titles, while the RX 550 is effectively relegated to legacy software, 2D desktop use, or as a display adapter. The data shows no scenario where the RX 550 outperforms the RX 6500 XT.

Architecture Differences

The architectural gap between these two cards is vast, spanning multiple generations and design philosophies. The RX 6500 XT is built on the RDNA 2.0 architecture, using the Navi 24 chip, manufactured on a 6 nm process at TSMC. The RX 550 uses the GCN 4.0 architecture with the Lexa chip, built on a 14 nm process at GlobalFoundries. This process difference is significant: 6 nm allows for a much higher transistor density of 50.5 million per square millimeter, compared to the RX 550's 21.4 million.

The transistor counts reflect this density advantage. The RX 6500 XT packs 5,400 million transistors on a 107 mm² die, while the RX 550 has just 2,200 million transistors on a similar 103 mm² die. This means the RX 6500 XT crams over twice the transistors into nearly the same physical space, enabling far more complex compute units and features.

Feature support also diverges sharply. The RX 6500 XT includes 16 dedicated ray tracing cores, a feature entirely absent from the RX 550. It also supports DirectX 12 Ultimate (12_2), while the RX 550 is limited to DirectX 12 (12_0). Vulkan support is also newer on the RX 6500 XT (version 1.4 vs 1.3). The RX 550 lacks any ray tracing hardware, making it incompatible with the growing list of games that require or benefit from it. The RX 6500 XT's FP16 performance is double its FP32 rate (11.53 TFLOPS vs 5.765 TFLOPS), whereas the RX 550 runs FP16 at the same rate as FP32 (1,211.4 GFLOPS for both), a legacy design choice.

Head-to-Head Benchmarks

The shared benchmark suite reveals a one-sided contest. In 3DMark Steel Nomad DX12, a modern DirectX 12 test, the RX 6500 XT scores 235 points against the RX 550's 127 points. This is an 85% advantage for the newer card, highlighting its superior geometry processing and rasterization capabilities. The RX 550's older GCN architecture struggles with the more complex draw calls and shading workloads of modern DX12 titles.

The gap widens dramatically in compute-oriented tests. In Geekbench OpenCL, the RX 6500 XT scores 48,289 points, a 336.5% increase over the RX 550's 11,063 points. This massive delta is due to the RX 6500 XT's higher shading unit count (1,024 vs 512) and much higher clock speeds. The RX 6500 XT's boost clock of 2815 MHz dwarfs the RX 550's 1183 MHz, allowing it to process far more instructions per second.

Geekbench Vulkan shows a similar story. The RX 6500 XT scores 54,724 points, which is 346% higher than the RX 550's 12,270 points. Vulkan is a low-overhead API that benefits from modern hardware design, and the RX 6500 XT's RDNA 2.0 architecture is significantly more efficient at handling its command buffers and draw calls. The RX 550's GCN 4.0 architecture, while functional, lacks the optimizations present in newer designs.

It is notably the RX 550 has a Geekbench Metal score of 20,838, but the RX 6500 XT has no corresponding Metal benchmark in the data, so no direct comparison is possible on that API.

Specification Differences

The specification table shows a comprehensive upgrade for the RX 6500 XT, though some metrics are counterintuitive. The most surprising difference is the memory bus width: the RX 550 has a 128-bit bus, while the RX 6500 XT uses a narrower 64-bit bus. Despite this, the RX 6500 XT achieves higher memory bandwidth at 143.9 GB/s compared to 112.0 GB/s, thanks to its faster GDDR6 memory running at 18 Gbps effective versus the RX 550's GDDR5 at 7 Gbps.

Memory capacity doubles from 2 GB to 4 GB, which is critical for modern game textures. The RX 6500 XT also has double the shading units (1,024 vs 512), texture mapping units (64 vs 32), and render output units (32 vs 16). Pixel rate scales from 18.93 GPixel/s to 90.08 GPixel/s, and texture rate jumps from 37.86 GTexel/s to 180.2 GTexel/s. FP32 compute rises from 1,211.4 GFLOPS to 5.765 TFLOPS.

Clock speeds are also significantly higher. The RX 6500 XT has a base clock of 2310 MHz and a boost clock of 2815 MHz, while the RX 550 is limited to 1100 MHz base and 1183 MHz boost. Power consumption increases from 50 W to 107 W, and the RX 6500 XT requires a 6-pin power connector, while the RX 550 draws power solely from the PCIe slot. The suggested PSU rating rises from 250 W to 300 W.

The RX 6500 XT uses a PCIe 4.0 x4 interface, while the RX 550 uses PCIe 3.0 x8. This is a trade-off: the newer card has a faster generation but fewer lanes. The RX 6500 XT also drops the DVI output, offering only HDMI 2.1 and DisplayPort 1.4a, whereas the RX 550 includes DVI alongside HDMI 2.0b and DisplayPort 1.4a. The RX 550 is physically shorter at 145 mm (5.7 inches) compared to the RX 6500 XT's unspecified length.

FAQ

Q: Which card has better ray tracing performance?

A: The AMD Radeon RX 6500 XT is the only one with ray tracing hardware, featuring 16 dedicated ray tracing cores. The AMD Radeon RX 550 has no ray tracing cores at all, making it incapable of hardware-accelerated ray tracing.

Q: How much faster is the RX 6500 XT in Vulkan compute?

A: The RX 6500 XT scores 54,724 points in Geekbench Vulkan, which is 346% higher than the RX 550's score of 12,270 points. This represents a more than four-fold performance advantage.

Q: Does the RX 550 have any advantage in memory bus width?

A: Yes, the RX 550 has a 128-bit memory bus, which is wider than the RX 6500 XT's 64-bit bus. However, the RX 6500 XT still achieves higher memory bandwidth (143.9 GB/s vs 112.0 GB/s) due to its faster GDDR6 memory.

Q: What is the power consumption difference?

A: The RX 6500 XT has a TDP of 107 W and requires a single 6-pin power connector, while the RX 550 has a TDP of 50 W and requires no power connector. The suggested PSU rating is 300 W for the RX 6500 XT and 250 W for the RX 550.

Q: Which card supports the newer DirectX version?

A: The RX 6500 XT supports DirectX 12 Ultimate (12_2), which includes features like ray tracing and mesh shaders. The RX 550 is limited to DirectX 12 (12_0), which lacks these modern features.

Q: Are these cards still in production?

A: No, both cards are marked as end-of-life. The RX 6500 XT was released on 2022-01-18, and the RX 550 was released on 2017-04-19.