AMD Radeon RX 7900M vs NVIDIA N1X 48SM Comparison

Where Each One Wins

The AMD Radeon RX 7900M and the NVIDIA N1X 48SM occupy fundamentally different positions in the database. The RX 7900M is a fully realized mobile discrete GPU with a rich benchmark history, while the N1X 48SM is a newly listed integrated part with no recorded benchmark scores at all. As a result, the RX 7900M wins every measured category by default, but the N1X 48SM claims structural advantages in memory capacity and raw shader count that could matter for specific workloads.

The RX 7900M delivers three recorded benchmark results: 4201 points in 3DMark Steel Nomad DX12, 129499 points in Geekbench OpenCL, and 158760 points in Geekbench Vulkan. Its average benchmark score across all tests is 97487, placing it in the 94th percentile of all GPUs in the database. This is a high-end part by any measure, with its closest rival being the AMD Radeon Pro VII at 97131 average score, a delta of just 0.4 percent ahead. The RX 7900M also sits 4.3 percent behind the NVIDIA Quadro RTX 6000 and 5.4 percent ahead of the AMD Radeon Instinct MI60.

The N1X 48SM has no benchmarks, no average score, and zero recorded wins. Its percentile rank is 50, which is the median mark for a GPU with no performance data. This makes direct performance comparison impossible, so the analysis must rely on architectural and specification differences rather than measured results.

For compute workloads, the RX 7900M shows a clear edge in floating-point throughput. Its FP32 rating of 38.52 TFLOPS is substantially higher than the N1X 48SM's 28.83 TFLOPS. The same applies to pixel fill rate, where the RX 7900M achieves 401.3 GPixel/s versus 112.6 GPixel/s for the N1X 48SM. However, the N1X 48SM counters with a higher texture rate of 900.9 GTexel/s compared to 601.9 GTexel/s for the RX 7900M, suggesting texture-bound scenarios could favor the NVIDIA part.

Memory capacity is where the N1X 48SM makes its strongest case. It carries 128 GB of LPDDR5X memory, a massive amount compared to the RX 7900M's 16 GB of GDDR6. For large dataset workloads, neural network inference, or memory-hungry professional applications, the N1X 48SM's capacity advantage is decisive. However, the RX 7900M's bandwidth of 576.0 GB/s far outstrips the N1X 48SM's 273.2 GB/s, meaning the AMD part moves data much faster per unit time.

Architecture Differences

The two GPUs come from completely different architectural lineages. The RX 7900M uses the Navi 31 chip built on RDNA 3.0 architecture, with the codename Plum Bonito. It belongs to the Navi Mobile (RX 7000M) generation and was released on 2023-10-18. The N1X 48SM uses the GB20B chip on Blackwell 2.0 architecture and belongs to the Blackwell IGP (N1x) generation, with a release date of 2026-05-31.

Both are fabricated on TSMC's 5 nm process node, but the similarities end there. The RX 7900M packs 57,700 million transistors on a 529 mm² die, giving a transistor density of 109.1M per mm². The N1X 48SM has a smaller 382 mm² die, and its transistor count is listed as unknown. The RX 7900M is a discrete mobile part, while the N1X 48SM is an integrated graphics processor (IGP), which explains its lack of dedicated power connectors and its portable device dependent display outputs.

Clock speeds differ dramatically. The RX 7900M runs at a base clock of 1825 MHz and boosts to 2090 MHz. The N1X 48SM idles at a much lower 741 MHz base but boosts to a higher 2346 MHz. Memory clocks also diverge: the RX 7900M's GDDR6 runs at 2250 MHz with 18 Gbps effective speed, while the N1X 48SM's LPDDR5X operates at 1067 MHz with 8.5 Gbps effective.

The compute unit layouts reveal different design philosophies. The RX 7900M has 4608 shading units, 288 texture mapping units, 192 raster output pipelines, and 72 ray tracing cores. The N1X 48SM counters with 6144 shading units, 384 texture mapping units, 48 raster output pipelines, 48 ray tracing cores, and 192 tensor cores. The N1X 48SM has 33 percent more shaders but only a quarter of the raster output units. The RX 7900M has no tensor cores listed, while the N1X 48SM's 192 tensor cores suggest a strong focus on AI acceleration.

Interface and API support differ as well. The RX 7900M uses PCIe 4.0 x16 and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM uses the newer PCIe 5.0 x16 interface but lists DirectX, OpenGL, and Vulkan support as N/A. This makes the RX 7900M the only one of the two with confirmed graphics API compatibility.

Power characteristics are only partially documented. The RX 7900M has a TDP of 180 W, while the N1X 48SM's TDP is listed as unknown. Neither part has a suggested PSU rating in the database. The RX 7900M is marked as IGP in slot width despite being a discrete GPU, and its power connectors are listed as none, which suggests it relies on the host system's power delivery.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between the RX 7900M and the N1X 48SM. This means there are no direct comparison scores, no delta percentages, and no win counts for either side. The only measurable performance data comes from the RX 7900M's standalone benchmarks.

In 3DMark Steel Nomad DX12, the RX 7900M scores 4201 points. This test is a modern gaming workload that stresses ray tracing and DX12 features, and the RX 7900M's 72 ray tracing cores and 192 raster output pipelines are well suited to it. The Geekbench OpenCL score of 129499 reflects general compute performance, while the Geekbench Vulkan score of 158760 shows even stronger low-level API throughput. The Vulkan result being 22.6 percent higher than the OpenCL result indicates the RDNA 3.0 architecture scales well with explicit control over hardware resources.

The N1X 48SM has no scores to compare, so the only meaningful analysis comes from specification-based projections. Its FP32 throughput of 28.83 TFLOPS would place it below the RX 7900M's 38.52 TFLOPS in raw math operations, but its 900.9 GTexel/s texture rate exceeds the RX 7900M's 601.9 GTexel/s. In texture-heavy scenes, the N1X 48SM might hold an advantage, but its 48 raster output pipelines and 112.6 GPixel/s pixel rate would bottleneck any fill-rate-limited workload.

The RX 7900M's nearest rivals provide useful context. It sits 0.4 percent ahead of the AMD Radeon Pro VII, 4.3 percent behind the NVIDIA Quadro RTX 6000, 5.4 percent ahead of the AMD Radeon Instinct MI60, and 6.3 percent ahead of the NVIDIA RTX A4500. These deltas show the RX 7900M operating in a tightly contested professional GPU band, where single-digit percentage differences separate top-tier parts. The Quadro RTX 6000's lead of 4.3 percent is the only rival that beats it, and that gap is small enough to be within benchmark variance.

Since the N1X 48SM has no nearest rivals listed, its competitive positioning cannot be established through the database. Its 50th percentile rank is a placeholder that indicates no performance data has been collected, not a measured standing among all GPUs.

The Verdict

The data supports a clear split based on use case. The AMD Radeon RX 7900M is the only one of the two with any recorded performance, and its 94th percentile ranking places it among the top GPUs in the database. Its 38.52 TFLOPS FP32 throughput, 576.0 GB/s memory bandwidth, and full DirectX 12 Ultimate support make it suitable for gaming and general compute workloads. The 3DMark Steel Nomad score of 4201 and Geekbench Vulkan score of 158760 confirm strong real-world performance in both gaming and compute scenarios.

The NVIDIA N1X 48SM is a different proposition entirely. With 128 GB of LPDDR5X memory, 192 tensor cores, and 6144 shading units, it is architected for capacity-intensive and AI-accelerated tasks. Its 28.83 TFLOPS FP32 rating is lower than the RX 7900M, but its tensor core count of 192 suggests machine learning workloads could be its primary domain. The lack of any graphics API support in the database makes gaming an uncertain prospect, and its 273.2 GB/s bandwidth is less than half the RX 7900M's, which would limit memory-bound compute performance.

For users who need a proven, high-performance mobile GPU with benchmark-verified capabilities, the RX 7900M is the clear choice. Its 180 W TDP is reasonable for a part of its performance class, and its active production status means it remains available. For users who require massive memory capacity and tensor core acceleration in an integrated form factor, the N1X 48SM offers those features, but with no performance data to validate its real-world behavior.

The RX 7900M wins every measured benchmark by default, but the N1X 48SM's specifications suggest it targets a different workload profile. The choice comes down to verified performance versus raw capacity and AI features. The database cannot confirm the N1X 48SM's performance level, so any claims about its capability remain speculative.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 7900M has an average benchmark score of 97487, placing it in the 94th percentile of all GPUs. The NVIDIA N1X 48SM has no recorded benchmarks and an average score of 0, placing it in the 50th percentile.

Q: How much memory does each GPU have?

A: The AMD Radeon RX 7900M has 16 GB of GDDR6 memory on a 256-bit bus. The NVIDIA N1X 48SM has 128 GB of LPDDR5X memory on a 256-bit bus.

Q: Which GPU has higher FP32 compute throughput?

A: The AMD Radeon RX 7900M delivers 38.52 TFLOPS of FP32 performance. The NVIDIA N1X 48SM delivers 28.83 TFLOPS of FP32 performance.

Q: Does the NVIDIA N1X 48SM support DirectX?

A: The database lists DirectX support as N/A for the NVIDIA N1X 48SM. The AMD Radeon RX 7900M supports DirectX 12 Ultimate (12_2).

Q: What is the memory bandwidth difference?

A: The AMD Radeon RX 7900M has a memory bandwidth of 576.0 GB/s, while the NVIDIA N1X 48SM has a memory bandwidth of 273.2 GB/s. The RX 7900M offers more than double the bandwidth.

Q: When was each GPU released?

A: The AMD Radeon RX 7900M was released on 2023-10-18. The NVIDIA N1X 48SM was released on 2026-05-31.