AMD Radeon RX 6450M vs NVIDIA GeForce RTX 5090 SE Comparison

AMD Radeon RX 6450M and NVIDIA GeForce RTX 5090 SE occupy opposite extremes of the mobile and desktop GPU spectrum. The RX 6450M is a compact, low-power integrated-style part for thin laptops, while the RTX 5090 SE is a massive dual-slot desktop card with flagship-class specifications. The database records no direct head-to-head benchmark runs between these two, and the win counts are zero for both sides. However, the specification data alone reveals a chasm in raw compute, memory throughput, and feature capability that defines their respective roles. This analysis compares the recorded figures to show where each part dominates and what that means for real-world workloads.

Head-to-Head Benchmarks

The database contains no benchmark entries for either GPU, so there are no measured scores, percentile rankings, or rival comparisons to reference. The recorded win count is 0 for the AMD Radeon RX 6450M and 0 for the NVIDIA GeForce RTX 5090 SE. Without direct performance data, the comparison rests entirely on the architectural and specification sheet. That sheet shows a one-sided contest in nearly every measurable category.

The most striking gap appears in floating-point performance. The RTX 5090 SE delivers 66.94 TFLOPS of FP32 compute, while the RX 6450M produces 3.779 TFLOPS. That is a 17.7x difference in raw shader throughput, meaning the NVIDIA part processes over seventeen times more single-precision operations per second. Texture rate tells a similar story: the RTX 5090 SE reaches 1,045.9 GTexel/s versus 118.1 GTexel/s for the RX 6450M, an 8.9x advantage. Pixel fill rate shows the RTX 5090 SE at 380.3 GPixel/s against 78.72 GPixel/s, a 4.8x lead. These ratios confirm the RTX 5090 SE is built for sustained high-resolution rendering, while the RX 6450M targets efficiency at modest resolutions.

Memory bandwidth amplifies the divide. The RTX 5090 SE has 1.34 TB/s of bandwidth through a 384-bit bus with GDDR7 memory, while the RX 6450M manages 128.0 GB/s over a 64-bit bus with GDDR6. That is a 10.5x bandwidth advantage for the NVIDIA part. The RTX 5090 SE also carries 24 GB of VRAM versus 4 GB, a 6x capacity difference. For workloads that scale with memory size, such as large texture sets or AI inference batches, the NVIDIA card operates in a different class entirely.

The RTX 5090 SE doubles the FP16 throughput at 66.94 TFLOPS (1:1 ratio), whereas the RX 6450M reaches 7.557 TFLOPS (2:1 ratio). The NVIDIA part's FP16 rate matches its FP32 rate, indicating full-rate half-precision execution, while AMD halves its FP16 throughput relative to FP32. This matters for machine learning training and certain compute tasks that rely on half-precision arithmetic.

Architecture Differences

The two GPUs come from different architectural generations and foundry processes. The RX 6450M uses the Navi 24 chip built on RDNA 2.0 architecture, fabricated by TSMC on a 6 nm process. The RTX 5090 SE uses the GB202 chip built on Blackwell 2.0 architecture, also from TSMC but on a 5 nm node. The process difference gives NVIDIA a smaller transistor footprint per unit area: the GB202 die measures 750 mm² with 92,200 million transistors, yielding a transistor density of 122.9M per mm². The Navi 24 die is 107 mm² with 5,400 million transistors, a density of 50.5M per mm². The NVIDIA chip packs more than 2.4x the transistor density, which contributes to its higher compute throughput despite a larger physical die.

Core counts reflect the scale difference. The RTX 5090 SE has 14,080 shading units, 440 texture mapping units, and 160 render output units. The RX 6450M has 768 shading units, 48 TMUs, and 32 ROPs. That is an 18.3x difference in shader cores, 9.2x in TMUs, and 5x in ROPs. The NVIDIA part also includes 110 RT cores and 440 tensor cores, while the RX 6450M lists 12 RT cores and no tensor cores at all. RT core count differs by 9.2x, and the tensor core presence is exclusive to NVIDIA, enabling dedicated AI acceleration that AMD lacks in this configuration.

Clock speeds tell a nuanced story. The RX 6450M has a higher base clock at 2000 MHz versus 1740 MHz for the RTX 5090 SE, and a higher boost clock at 2460 MHz versus 2377 MHz. The AMD part also lists a game clock of 2220 MHz, which the NVIDIA card does not specify. However, the NVIDIA GPU compensates with vastly more execution units, so its lower clock still produces far higher aggregate throughput. The memory clock differs: the RX 6450M runs at 2000 MHz with 16 Gbps effective data rate, while the RTX 5090 SE runs at 1750 MHz with 28 Gbps effective. The NVIDIA memory operates at a higher effective rate despite a lower base clock, and the wider 384-bit bus multiplies that into far greater bandwidth.

The bus interface reflects their positioning. The RX 6450M uses PCIe 4.0 x4, a narrow link suited for compact laptops, while the RTX 5090 SE uses PCIe 5.0 x16, a full-bandwidth connection for desktop motherboards. Power delivery differs fundamentally: the RX 6450M draws 50 W TDP with no power connectors, while the RTX 5090 SE draws 500 W TDP, requires a 1x 16-pin connector, and lists a 900 W suggested PSU. The slot width also differs, with the RX 6450M marked as IGP (integrated graphics package) and the RTX 5090 SE as dual-slot.

Where Each One Wins

Based on the recorded specifications, the RTX 5090 SE wins every compute and rendering category. It leads in FP32 throughput, FP16 throughput, texture fill rate, pixel fill rate, memory bandwidth, memory capacity, and core counts. For workloads that demand maximum graphics performance, such as high-resolution gaming, 3D rendering, or scientific simulation, the NVIDIA part is categorically superior. The 24 GB VRAM and 1.34 TB/s bandwidth enable large datasets and high-resolution textures that the RX 6450M cannot accommodate.

The RX 6450M wins in efficiency metrics. Its 50 W TDP is one-tenth the RTX 5090 SE's 500 W TDP. For portable devices, the RX 6450M's IGP slot width and lack of power connectors mean it can fit into thin chassis without external power. The higher base and boost clocks suggest a design focused on responsiveness at low power, though the absolute performance ceiling remains far lower. The RX 6450M also has a smaller die size at 107 mm², which reduces manufacturing cost per wafer, though the database does not include pricing for this part.

In terms of release timing, the RX 6450M launched on 2023-01-03, while the RTX 5090 SE launched on 2025-12-31. The newer NVIDIA part benefits from two additional years of architectural development, though the database does not provide comparative performance data to quantify that generational improvement. The predecessor fields differ: the RX 6450M succeeds Polaris Mobile, while the RTX 5090 SE succeeds the GeForce 40 series and has a listed successor in GeForce 60.

Specification Differences

The two parts differ across nearly every recorded specification. Process node: 6 nm for AMD versus 5 nm for NVIDIA. Die size: 107 mm² versus 750 mm². Transistors: 5,400 million versus 92,200 million. Transistor density: 50.5M per mm² versus 122.9M per mm². Base clock: 2000 MHz versus 1740 MHz. Boost clock: 2460 MHz versus 2377 MHz. Memory clock: 2000 MHz with 16 Gbps effective versus 1750 MHz with 28 Gbps effective. Memory size: 4 GB versus 24 GB. Memory type: GDDR6 versus GDDR7. Bus width: 64 bit versus 384 bit. Bandwidth: 128.0 GB/s versus 1.34 TB/s.

Shading units: 768 versus 14,080. TMUs: 48 versus 440. ROPs: 32 versus 160. RT cores: 12 versus 110. Tensor cores: absent versus 440. Pixel rate: 78.72 GPixel/s versus 380.3 GPixel/s. Texture rate: 118.1 GTexel/s versus 1,045.9 GTexel/s. FP32: 3.779 TFLOPS versus 66.94 TFLOPS. FP16: 7.557 TFLOPS (2:1) versus 66.94 TFLOPS (1:1). TDP: 50 W versus 500 W. Slot width: IGP versus dual-slot. Power connectors: none versus 1x 16-pin. Suggested PSU: not listed versus 900 W. Bus interface: PCIe 4.0 x4 versus PCIe 5.0 x16. Display outputs: portable device dependent versus 1x HDMI 2.1b and 3x DisplayPort 2.1b. Dimensions: not listed for AMD versus 267 mm length, 111 mm height, 40 mm width for NVIDIA. Release date: 2023-01-03 versus 2025-12-31. Launch MSRP: not listed for AMD versus 1,499 USD for NVIDIA. The RTX 5090 SE also has a successor (GeForce 60) while the RX 6450M does not.

Both share DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 API support. Both are marked as Active in production status. The RTX 5090 SE has a higher transistor density by 2.4x, indicating a more compact logic design per area.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The RTX 5090 SE delivers 66.94 TFLOPS, while the RX 6450M produces 3.779 TFLOPS, a 17.7x difference.

Q: How much memory bandwidth does each card provide?

A: The RTX 5090 SE provides 1.34 TB/s over a 384-bit GDDR7 interface, while the RX 6450M provides 128.0 GB/s over a 64-bit GDDR6 bus.

Q: What is the TDP difference between the two?

A: The RX 6450M has a 50 W TDP with no power connectors, while the RTX 5090 SE has a 500 W TDP, requires a 1x 16-pin connector, and suggests a 900 W PSU.

Q: Does the RX 6450M have tensor cores?

A: No, the RX 6450M lists 12 RT cores but no tensor cores. The RTX 5090 SE has 110 RT cores and 440 tensor cores.

Q: Which GPU has a higher base clock?

A: The RX 6450M has a base clock of 2000 MHz versus 1740 MHz for the RTX 5090 SE. The AMD part also has a higher boost clock at 2460 MHz versus 2377 MHz.

Q: What is the memory capacity of each?

A: The RX 6450M has 4 GB of GDDR6 memory, while the RTX 5090 SE has 24 GB of GDDR7 memory, a 6x capacity difference.

The Verdict

The recorded data shows a complete performance hierarchy: the RTX 5090 SE dominates every compute, memory, and rendering metric. It leads by 17.7x in FP32, 8.9x in texture rate, 4.8x in pixel rate, 10.5x in memory bandwidth, and 6x in VRAM capacity. It also has 18.3x more shading units, 9.2x more TMUs, 5x more ROPs, and 9.2x more RT cores. The NVIDIA part is the clear choice for any workload requiring maximum graphics throughput, large memory footprints, or AI acceleration via tensor cores.

The RX 6450M wins on power efficiency, with a 50 W TDP that is one-tenth of the RTX 5090 SE's 500 W, and it fits in an IGP form factor with no external power. Its higher base and boost clocks suggest a tuned-for-efficiency design, but the absolute performance ceiling is far lower. The RX 6450M suits portable devices that prioritize battery life and thermal constraints over raw speed, while the RTX 5090 SE targets desktop systems with robust power delivery and cooling.

Users who need high-resolution gaming, 3D rendering, or compute-heavy tasks should choose the RTX 5090 SE based on its superior specifications. Users who require a low-power, integrated-style GPU for a thin laptop should pick the RX 6450M, accepting its limited compute capability. The database shows no benchmark overlap, so the decision rests on the specification sheet, and that sheet points decisively to the NVIDIA part for performance and to the AMD part for efficiency.