AMD Radeon RX 550X vs AMD Radeon RX 7800 XT Comparison

The AMD Radeon RX 7800 XT and the AMD Radeon RX 550X represent two entirely different eras and performance tiers within AMD’s lineup. The RX 7800 XT is a current-generation, high-end part built on the RDNA 3.0 architecture, while the RX 550X is an end-of-life, entry-level card based on the older GCN 4.0 design. Benchmark data shows a stark performance gulf, with the RX 7800 XT leading by margins ranging from 89.3% to 379.9% in the available tests, yet the RX 550X still holds relevance in its specific niche due to its minimal power requirements and compact size.

FAQ

Q: How much faster is the AMD Radeon RX 7800 XT than the RX 550X in Vulkan?

A: In the Geekbench Vulkan test, the RX 7800 XT scored 54,228 points compared to the RX 550X’s 11,299 points, resulting in a 379.9% performance advantage for the newer card.

Q: What is the difference in average benchmark scores between the two cards?

A: The RX 7800 XT has an average benchmark score of 11,627, while the RX 550X averages 10,481. This places the RX 7800 XT at the 51st percentile of all GPUs, whereas the RX 550X sits at the 49th percentile.

Q: Which card has a higher transistor density?

A: The RX 7800 XT, built on a 5 nm process, has a transistor density of 81.2 million transistors per square millimeter. The RX 550X, on a 14 nm process, has a density of 21.4 million per square millimeter.

Q: Does the RX 550X support hardware ray tracing?

A: No. The RX 550X has no ray tracing cores listed in its specifications. The RX 7800 XT includes 60 ray tracing cores.

Q: What is the difference in memory bandwidth?

A: The RX 7800 XT provides 624.1 GB/s of bandwidth from 16 GB of GDDR6 memory on a 256-bit bus. The RX 550X offers 96.00 GB/s from 4 GB of GDDR5 memory on a 128-bit bus.

Q: What is the thermal design power (TDP) difference?

A: The RX 7800 XT has a TDP of 263 W and requires a 600 W power supply. The RX 550X has a TDP of 50 W and uses a 250 W power supply, drawing power solely from the motherboard with no external connectors.

Architecture Differences

The architectural gap between these two cards is fundamental. The RX 7800 XT utilizes the RDNA 3.0 architecture on a 5 nm process, fabricated by TSMC, with a die size of 346 mm² and 28,100 million transistors. In contrast, the RX 550X is based on the older GCN 4.0 architecture, manufactured on a 14 nm process by GlobalFoundries, with a die size of 103 mm² and only 2,200 million transistors. This generational shift is reflected in every major specification.

Compute resources differ by an order of magnitude. The RX 7800 XT packs 3,840 shading units, 240 texture mapping units, and 96 render output units. The RX 550X has 512 shading units, 32 TMUs, and 16 ROPs. Furthermore, the RX 7800 XT includes 60 dedicated ray tracing cores, a feature entirely absent from the RX 550X. The memory subsystem also highlights the gulf: the newer card uses 16 GB of GDDR6 on a 256-bit bus, while the older card uses 4 GB of GDDR5 on a 128-bit bus.

Interface and output capabilities also diverge. The RX 7800 XT uses a PCIe 4.0 x16 bus interface, whereas the RX 550X uses the older PCIe 3.0 x8 standard. Display outputs differ as well: the RX 7800 XT offers one HDMI 2.1a port and three DisplayPort 2.1 connections, while the RX 550X provides one DVI, one HDMI 2.0b, and one DisplayPort 1.4a. API support follows the generational split, with the RX 7800 XT supporting DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the RX 550X supports DirectX 12 (12_0) and Vulkan 1.3.

Head-to-Head Benchmarks

The direct comparison data includes two benchmark tests, and the RX 7800 XT wins both decisively. In the Geekbench OpenCL test, the RX 7800 XT scores 18,290 points against the RX 550X’s 9,662 points. This translates to an 89.3% performance delta, meaning the newer card is nearly twice as fast in this compute-oriented workload. The margin in the Geekbench Vulkan test is even more pronounced. The RX 7800 XT achieves a score of 54,228, while the RX 550X manages only 11,299 points, yielding a 379.9% advantage. This indicates that the RX 7800 XT is over four times faster in graphics API performance.

These results align with the broader benchmark averages. The RX 7800 XT’s average benchmark score of 11,627 is 1,146 points higher than the RX 550X’s 10,481. However, the average scores tell a less dramatic story than the head-to-head tests, because they aggregate different workloads. When looking at the nearest rivals, the RX 7800 XT is positioned very closely to the NVIDIA GeForce GTX 1660, which has an average score of 11,680 and a delta of -0.5%. The RX 550X, meanwhile, sits near the AMD Radeon RX 6500M, which has an average score of 10,362 and a delta of 1.2%. This context shows that while the RX 7800 XT is far ahead of the RX 550X, it is not at the very top of the performance spectrum; it competes with mid-range cards from previous generations.

The Verdict

The data is unambiguous: the AMD Radeon RX 7800 XT is the superior performer in every measured category. Its 89.3% lead in OpenCL and 379.9% lead in Vulkan demonstrate that it is in a completely different performance class. The RX 7800 XT is designed for modern gaming and compute workloads, with 16 GB of memory, ray tracing support, and a 5 nm process node. It holds the 51st percentile ranking among all GPUs, which is slightly above average.

The AMD Radeon RX 550X, despite its low scores, serves a distinct purpose. Its 50 W TDP, lack of power connectors, and 250 W suggested PSU make it suitable for systems with limited power budgets or small form factor builds. Its 145 mm length and dual-slot design allow for installation in compact chassis where the RX 7800 XT’s 267 mm length would not fit. The RX 550X is end-of-life, but for users who need basic graphics output without additional power cabling, it remains a functional, if not performant, option.

Specification Differences

The two cards differ in nearly every specification field. The RX 7800 XT uses a 5 nm process with 28,100 million transistors on a 346 mm² die, while the RX 550X uses a 14 nm process with 2,200 million transistors on a 103 mm² die. Clock speeds vary significantly: the RX 7800 XT has a base clock of 1295 MHz and a boost clock of 2430 MHz, whereas the RX 550X operates at a base of 1100 MHz and a boost of 1183 MHz. The RX 7800 XT also has a game clock of 2124 MHz, a feature the RX 550X lacks.

Memory configurations are vastly different. The RX 7800 XT offers 16 GB of GDDR6 with a 256-bit bus and 624.1 GB/s bandwidth, while the RX 550X offers 4 GB of GDDR5 with a 128-bit bus and 96.00 GB/s bandwidth. The RX 7800 XT has 3,840 shading units, 240 TMUs, 96 ROPs, and 60 RT cores; the RX 550X has 512 shading units, 32 TMUs, and 16 ROPs, with no RT cores. Pixel and texture rates reflect the compute disparity: 233.3 GPixel/s and 583.2 GTexel/s for the RX 7800 XT versus 18.93 GPixel/s and 37.86 GTexel/s for the RX 550X. FP32 performance is 37.32 TFLOPS for the RX 7800 XT and 1,211.4 GFLOPS for the RX 550X.

Power and physical specifications also diverge. The RX 7800 XT has a TDP of 263 W, requires two 8-pin power connectors, and a 600 W PSU. The RX 550X has a TDP of 50 W, no power connectors, and a 250 W PSU. The RX 7800 XT measures 267 mm in length, 111 mm in height, and 50 mm in width; the RX 550X measures 145 mm in length with unspecified height and width. The RX 7800 XT is an active production product released in September 2023, while the RX 550X is end-of-life, released in December 2018.

Where Each One Wins

The RX 7800 XT wins in all performance-oriented scenarios. Its 16 GB of GDDR6 memory and 624.1 GB/s bandwidth make it suitable for high-resolution textures and memory-intensive applications. The 60 ray tracing cores enable hardware-accelerated ray tracing, a feature entirely missing from the RX 550X. The 379.9% Vulkan lead indicates superior graphics API performance, making it the clear choice for modern gaming. Its DirectX 12 Ultimate support and Vulkan 1.4 compatibility ensure it can handle the latest titles and API features. The 51st percentile ranking, while not elite, places it above the average GPU, and its nearest rival, the GTX 1660, shows the RX 7800 XT is competitive with established mid-range performers.

The RX 550X wins in scenarios where power efficiency and physical footprint are paramount. Its 50 W TDP is less than one-fifth of the RX 7800 XT’s 263 W, and it requires no auxiliary power connectors, making it compatible with a wider range of pre-built systems and older power supplies. The 250 W suggested PSU means it can be installed in systems with modest power delivery. Its 145 mm length is significantly shorter than the RX 7800 XT’s 267 mm, allowing installation in compact cases. The RX 550X also holds a 49th percentile ranking, which is close to the RX 7800 XT’s 51st percentile despite the massive performance gap, indicating that its average score is not as far off as the head-to-head tests suggest. The RX 550X’s nearest rivals, such as the AMD Radeon RX 6500M, show it is competitive within its own low-power segment. For users who need basic display output, legacy application support, or a low-cost secondary GPU, the RX 550X remains viable, but for any compute or gaming workload, the RX 7800 XT is the only logical choice based on the data.