AMD Radeon RX 6550M vs NVIDIA GeForce RTX 4090 Comparison

Head-to-Head Benchmarks

The benchmark data shows a decisive, category-defining gap between these two GPUs. In the two shared tests recorded in the database, the NVIDIA GeForce RTX 4090 wins both outright, and the margins are staggering. In Geekbench OpenCL, the RTX 4090 scores 255,416 against the RX 6550M's 42,536, a delta of 500.5%. That is not a marginal generational step; it is an order-of-magnitude separation in raw compute throughput.

The Vulkan results tell a similar story. The RTX 4090 posts 271,631, while the RX 6550M manages 50,867, a 434% advantage for the NVIDIA part. Both tests are synthetic compute workloads, but they are consistent in their verdict: the desktop flagship completely overwhelms the mobile entry-level part. The data records 2 wins for the RTX 4090 and 0 for the RX 6550M in head-to-head testing.

What is notable is the percentile placement of both cards. The RTX 4090 sits in the 88th percentile of all GPUs in the database, while the RX 6550M is close behind at the 85th percentile. This seems counterintuitive given the massive score gap, but it reflects the distribution of the database, where the RTX 4090's average benchmark score of 60,347 is only 0.3% ahead of the AMD Radeon Pro Vega 48 and essentially tied with the Intel Arc Pro A60. The RX 6550M, with an average score of 46,702, is within 1.6% of the NVIDIA RTX 5880 Ada Generation and 0.2% of the Intel Arc A530M. In other words, both cards sit in a dense cluster of similarly-scoring hardware, but the RTX 4090 is in a higher tier of that cluster.

The average benchmark score gap is also informative. The RTX 4090's average is 60,347, while the RX 6550M's is 46,702, a difference of roughly 13,645 points. That is a substantial gap, but it is far smaller than the Geekbench deltas suggest because the RTX 4090's average includes tests like Passmark DirectX 10 at 224, DirectX 11 at 326, and DirectX 12 at 150, scores that drag its average down relative to its compute peaks. The RX 6550M only has two recorded benchmarks in the database, both Geekbench tests, so its average is a narrower sample.

Where Each One Wins

The RTX 4090 wins in every recorded head-to-head test, so the use-case split is largely a matter of context rather than competition. The NVIDIA card is built for maximum throughput across every metric in the database. Its Passmark G3D score is 38,194, its Passmark GPU Compute score is 26,613, and its Passmark G2D score is 1,299. It also records Passmark DirectX 9 at 397, DirectX 10 at 224, DirectX 11 at 326, and DirectX 12 at 150. These are not competitive numbers against the RX 6550M because the AMD part has no equivalent entries in the database; the only shared tests are the two Geekbench workloads, and the RTX 4090 dominates both.

The RX 6550M, however, occupies a completely different segment. It is an active, in-production mobile part with an 80 W TDP, while the RTX 4090 is an end-of-life desktop card with a 450 W TDP. The RX 6550M is designed for portability and efficiency, not for absolute performance. Its 4 GB GDDR6 memory on a 64-bit bus with 144.0 GB/s bandwidth is sufficient for lighter workloads, but it cannot approach the RTX 4090's 24 GB GDDR6X on a 384-bit bus with 1.01 TB/s bandwidth.

Where the RX 6550M would logically win is in any scenario that values power draw, physical footprint, or system integration. It is an IGP (integrated graphics processor) with no power connectors and no dedicated slot width, making it suitable for thin-and-light laptops. The RTX 4090 is a triple-slot card that requires a 1x 16-pin power connector and an 850 W suggested PSU. Those are not benchmark scores, but they are decisive factors in real-world deployment.

Architecture Differences

The architectural divide here is fundamental. The RTX 4090 uses the AD102 chip built on TSMC's 5 nm process, while the RX 6550M uses the Navi 24 chip on TSMC's 6 nm process. The RTX 4090 packs 76,300 million transistors on a 609 mm² die, yielding a transistor density of 125.3 million per mm². The RX 6550M has 5,400 million transistors on a 107 mm² die, or 50.5 million per mm². That is a 14x difference in transistor count and a 5.7x difference in die area.

The compute resources are equally lopsided. The RTX 4090 has 16,384 shading units, 512 TMUs, and 176 ROPs, along with 128 RT cores and 512 tensor cores. The RX 6550M has 1,024 shading units, 64 TMUs, and 32 ROPs, with 16 RT cores and no tensor cores at all. The RTX 4090's FP32 throughput is 82.58 TFLOPS, while the RX 6550M's is 5.816 TFLOPS, a 14.2x gap. The FP16 numbers are interesting: the RTX 4090 does 82.58 TFLOPS at a 1:1 ratio, while the RX 6550M does 11.63 TFLOPS at a 2:1 ratio, meaning the AMD part halves its FP16 rate when doing FP32 work.

Clocks are the one area where the RX 6550M is competitive on paper. Its boost clock is 2840 MHz, with a game clock of 2560 MHz and a base of 2000 MHz. The RTX 4090's boost is 2520 MHz with a base of 2235 MHz. The AMD part actually boosts higher, but that is meaningless given the massive difference in shading units and memory bandwidth. Memory clocks also favor AMD in raw frequency: the RX 6550M runs 2250 MHz (18 Gbps effective) versus the RTX 4090's 1313 MHz (21 Gbps effective), but the RTX 4090's 384-bit bus and GDDR6X type deliver 1.01 TB/s versus 144.0 GB/s.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 4090 uses PCIe 4.0 x16, while the RX 6550M uses PCIe 4.0 x4. The RTX 4090 has display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the RX 6550M's outputs are listed as portable device dependent.

FAQ

Q: Which GPU has the higher FP32 compute throughput?

A: The NVIDIA GeForce RTX 4090, at 82.58 TFLOPS, versus the AMD Radeon RX 6550M's 5.816 TFLOPS, a 14.2x difference.

Q: What is the memory configuration difference?

A: The RTX 4090 has 24 GB of GDDR6X on a 384-bit bus with 1.01 TB/s bandwidth. The RX 6550M has 4 GB of GDDR6 on a 64-bit bus with 144.0 GB/s bandwidth.

Q: Are these GPUs in the same performance percentile?

A: No. The RTX 4090 is in the 88th percentile of all GPUs, while the RX 6550M is in the 85th percentile. Both are high, but the RTX 4090 is above.

Q: Which card has tensor cores?

A: Only the RTX 4090, which has 512 tensor cores. The RX 6550M has none recorded in the database.

Q: How do the power requirements compare?

A: The RTX 4090 has a 450 W TDP and requires a 1x 16-pin power connector with an 850 W suggested PSU. The RX 6550M has an 80 W TDP, no power connectors, and no suggested PSU listed.

Q: What is the production status of each card?

A: The RTX 4090 is listed as end-of-life, while the RX 6550M is listed as active.

The Verdict

The data is unambiguous: the NVIDIA GeForce RTX 4090 is the overwhelmingly faster GPU in every recorded metric. Its Geekbench OpenCL score is 500.5% higher, its Vulkan score is 434% higher, and its average benchmark score is roughly 13,645 points higher. It has more shading units, more memory, more bandwidth, and more compute throughput by an order of magnitude. Anyone choosing between these two for raw performance must pick the RTX 4090.

The RX 6550M, however, is not a failure by the numbers. It is an active mobile part with an 80 W TDP, no power connectors, and an IGP form factor. It sits within 1.6% of the NVIDIA RTX 5880 Ada Generation in average benchmark score and within 0.2% of the Intel Arc A530M. That places it in a competitive cluster for its class. The RTX 4090, by contrast, is essentially tied with the Intel Arc Pro A60 and only 0.3% ahead of the AMD Radeon Pro Vega 48, which suggests it is not as isolated at the top of the database as its raw scores might imply.

The decision framework is simple. If the use case demands maximum compute, memory capacity, and bandwidth, and the system can supply 450 W plus an 850 W PSU, the RTX 4090 is the only choice. If the use case requires a low-power, portable, integrated solution with no external power, the RX 6550M is the only choice. There is no overlap. The RTX 4090 is a desktop flagship at end-of-life; the RX 6550M is an active mobile part. The data supports both as appropriate for their respective segments, but they are not competitors in any meaningful sense.