AMD Radeon RX 7900M vs NVIDIA GeForce RTX 5090 Comparison

The AMD Radeon RX 7900M and the NVIDIA GeForce RTX 5090 represent two vastly different approaches to high-performance graphics, separated by over a year of silicon evolution. The data reveals a decisive performance gap, but also highlights distinct architectural philosophies and target use cases that go beyond raw benchmark scores.

Where Each One Wins

The benchmark results paint a clear picture: the NVIDIA GeForce RTX 5090 wins every single head-to-head comparison in the data. Out of three shared tests, the RTX 5090 takes all three, with the AMD Radeon RX 7900M securing zero victories. This is not a close contest. The most significant win for NVIDIA comes in the 3DMark Steel Nomad DX12 test, where it scores 18,355 compared to AMD's 4,201, a delta of -77.1% for the AMD card. This indicates that in modern, DirectX 12-based gaming workloads, the RTX 5090 is in a completely different performance class.

However, the AMD card is not without its strengths, particularly when contextualized within its own product segment. The RX 7900M holds a 94th percentile ranking among all GPUs, while the RTX 5090 sits at the 92nd percentile. This is a curious inversion, suggesting that while the RTX 5090 is faster in absolute terms, the RX 7900M's performance is more impressive relative to its contemporaries in the mobile space. The RX 7900M's average benchmark score of 97,487 places it just 0.4% ahead of the AMD Radeon Pro VII and 5.4% ahead of the AMD Radeon Instinct MI60, showing it competes strongly with professional workstation cards. In contrast, the RTX 5090's average score of 79,842 puts it a mere 0.3% ahead of the NVIDIA Tesla P100 PCIe 16 GB, indicating it is benchmarked against very different, often older or specialized hardware.

The data suggests the RTX 5090 is the undisputed champion for absolute performance in gaming and compute. The RX 7900M, with its lower power envelope and mobile integration, represents a high-end solution for its niche, but it cannot match the desktop-class might of the RTX 5090. The wins are singular and one-sided; there is no benchmark category where the AMD card comes out on top.

Architecture Differences

The two GPUs are built on fundamentally different architectures, which explains their divergent performance profiles. The AMD Radeon RX 7900M uses the Navi 31 chip based on the RDNA 3.0 architecture, codenamed "Plum Bonito," and belongs to the Navi Mobile (RX 7000M) generation. The NVIDIA GeForce RTX 5090, conversely, is built on the GB202 chip with the Blackwell 2.0 architecture, part of the GeForce 50 generation. Both are fabricated on a 5 nm process at TSMC, but that is where the similarities end.

The transistor counts reveal a massive difference in scale. The RTX 5090 packs 92,200 million transistors on a 750 mm² die, while the RX 7900M has 57,700 million transistors on a 529 mm² die. This translates to a higher transistor density for NVIDIA at 122.9M / mm² compared to AMD's 109.1M / mm². This physical advantage gives NVIDIA a substantial foundation for its higher core counts. The RTX 5090 features 21,760 shading units, 680 TMUs, and 170 RT cores, dwarfing the RX 7900M's 4,608 shading units, 288 TMUs, and 72 RT cores. The RTX 5090 also includes 680 tensor cores, a feature entirely absent from the RX 7900M's specifications.

Memory architecture is another major differentiator. The RX 7900M uses 16 GB of GDDR6 on a 256-bit bus, yielding a bandwidth of 576.0 GB/s. The RTX 5090, however, uses 32 GB of GDDR7 on a 512-bit bus, achieving a bandwidth of 1.79 TB/s. This is more than triple the bandwidth of the AMD card. Even the ROP count differs, with the RX 7900M having 192 ROPs versus the RTX 5090's 176, a rare area where the AMD card has a slight numerical edge, though it doesn't translate into a performance win. The power and physical design also differ drastically, with the RX 7900M being an IGP with no power connectors and a 180 W TDP, while the RTX 5090 is a dual-slot card with a 1x 16-pin connector, a 575 W TDP, and a suggested power supply of 950 W.

FAQ

Q: Which GPU is faster in the 3DMark Steel Nomad DX12 benchmark?

A: The NVIDIA GeForce RTX 5090 is significantly faster, scoring 18,355 compared to the AMD Radeon RX 7900M's 4,201. This represents a -77.1% difference, making it the largest performance gap in the head-to-head data.

Q: How does the RTX 5090's memory bandwidth compare to the RX 7900M's?

A: The RTX 5090 has a substantial advantage with 1.79 TB/s of bandwidth from its 32 GB of GDDR7 on a 512-bit bus. The RX 7900M offers 576.0 GB/s from its 16 GB of GDDR6 on a 256-bit bus.

Q: What are the core count differences between the two cards?

A: The RTX 5090 has 21,760 shading units, 680 TMUs, and 170 RT cores. The RX 7900M has 4,608 shading units, 288 TMUs, and 72 RT cores. The RTX 5090 also has 680 tensor cores, while the RX 7900M has none listed.

Q: Which GPU has a higher percentile ranking among all GPUs?

A: The AMD Radeon RX 7900M has a higher percentile ranking at 94, while the NVIDIA GeForce RTX 5090 is at 92. This suggests the RX 7900M is more exceptional within its own generation and form factor.

Q: How do their average benchmark scores compare to their nearest rivals?

A: The RX 7900M's average score of 97,487 is 0.4% higher than the AMD Radeon Pro VII and 6.3% higher than the NVIDIA RTX A4500. The RTX 5090's average score of 79,842 is 0.3% higher than the NVIDIA Tesla P100 PCIe 16 GB and 1.1% higher than the AMD Radeon RX 6850M XT.

Q: What are the power consumption requirements for each card?

A: The RX 7900M has a TDP of 180 W and is an IGP with no power connectors. The RTX 5090 has a TDP of 575 W, requires a 1x 16-pin power connector, and has a suggested PSU of 950 W.

Specification Differences

The specification sheets for these two GPUs diverge on nearly every major component. The most obvious differences are in memory, where the RX 7900M offers 16 GB of GDDR6 on a 256-bit bus, while the RTX 5090 offers 32 GB of GDDR7 on a 512-bit bus. This leads to a bandwidth difference of 576.0 GB/s versus 1.79 TB/s, a massive chasm. The core configuration is equally divergent, with the RTX 5090 featuring 21,760 shading units, 680 TMUs, and 170 RT cores, compared to the RX 7900M's 4,608 shading units, 288 TMUs, and 72 RT cores. The RTX 5090 also has 680 tensor cores, while the RX 7900M has no tensor core specification.

Clock speeds also differ, with the RTX 5090 running at a base of 2017 MHz and a boost of 2407 MHz, while the RX 7900M runs at a base of 1825 MHz and a boost of 2090 MHz. The memory clock also differs, with the RTX 5090 at 1750 MHz (28 Gbps effective) and the RX 7900M at 2250 MHz (18 Gbps effective). The physical and power profiles are starkly contrasted: the RX 7900M is an IGP with a 180 W TDP and no power connectors, whereas the RTX 5090 is a dual-slot card measuring 304 mm in length, with a 575 W TDP and a 1x 16-pin power connector. The bus interface is also newer on the RTX 5090, using PCIe 5.0 x16 compared to the RX 7900M's PCIe 4.0 x16. The RTX 5090's die is larger at 750 mm² with 92,200 million transistors, versus 529 mm² and 57,700 million for the RX 7900M.

Head-to-Head Benchmarks

The three shared benchmarks all result in decisive victories for the NVIDIA GeForce RTX 5090. The largest margin is in the 3DMark Steel Nomad DX12 test, where the RTX 5090 scores 18,355 against the RX 7900M's 4,201. This -77.1% delta is the most telling statistic, indicating that the RTX 5090 is nearly four and a half times faster in this synthetic gaming workload. This test likely stresses the GPU's raw compute and rasterization capabilities, where the RTX 5090's massive core count and bandwidth are overwhelming.

In the Geekbench OpenCL test, which measures general-purpose compute, the RTX 5090 again dominates with a score of 334,370 compared to the RX 7900M's 129,499, a -61.3% difference. This shows that the NVIDIA card's advantage extends beyond gaming into compute-heavy tasks like rendering and machine learning. The Geekbench Vulkan test shows a slightly smaller, but still massive, gap. Here, the RTX 5090 scores 376,728 against the RX 7900M's 158,760, a -57.9% delta. This test leverages the Vulkan API, and while the gap is the smallest of the three, it still shows the RTX 5090 is more than twice as fast. The data consistently points to a GPU that is in a higher performance tier across all APIs and workloads tested.

The Verdict

The verdict from the data is unambiguous: the NVIDIA GeForce RTX 5090 is the superior performer in every measurable head-to-head benchmark. For users seeking the absolute highest frame rates in DirectX 12 and Vulkan games, or maximum throughput in OpenCL compute workloads, the RTX 5090 is the clear choice based on its performance scores. Its 3DMark Steel Nomad score of 18,355 and Geekbench Vulkan score of 376,728 are more than double those of the RX 7900M.

However, the AMD Radeon RX 7900M should not be dismissed. Its 94th percentile ranking versus the RTX 5090's 92nd suggests that, within its mobile IGP form factor, it is a remarkably powerful part. With a 180 W TDP and no external power connectors, it offers a level of high-end performance in a more integrated package. A user prioritizing a powerful laptop solution might find the RX 7900M's performance class more than adequate, especially when considering its position relative to professional cards like the AMD Radeon Pro VII. For a desktop user who demands the pinnacle of performance and has the power budget to support it, the RTX 5090 is the only choice supported by the benchmark data.