NVIDIA B300 SXM6 AC vs NVIDIA N1X 48SM Comparison

The Verdict

The NVIDIA B300 SXM6 AC is the clear performance leader based on recorded data. It delivers an OpenCL score of 369,831, placing it in the 100th percentile of all GPUs in the database. The NVIDIA N1X 48SM has no recorded benchmark scores, sits at the 50th percentile, and lacks any comparable measurement, so the B300 SXM6 AC is the only defensible choice for compute-heavy workloads where validated performance is required.

The B300 SXM6 AC is designed as a server module with a 1100 W TDP and a suggested 1500 W PSU, indicating a data-center oriented part. The N1X 48SM is an IGP (integrated graphics processor) with a 1x HDMI output, no power connectors, and no TDP listed, positioning it as a low-power integrated solution. The data shows no benchmark overlap, so the selection between the two is dictated by the target platform: the B300 SXM6 AC for dedicated server acceleration, the N1X 48SM for integrated graphics in a system-on-chip context.

Architecture Differences

The B300 SXM6 AC uses the GB110 chip based on the Blackwell Ultra architecture, belonging to the Server Blackwell (Bxx) generation. Its process node is 5 nm at TSMC, with 208,000 million transistors on a 1628 mm² die, yielding a transistor density of 127.8M per mm². The N1X 48SM uses the GB20B chip based on Blackwell 2.0, from the Blackwell IGP (N1x) generation. It also uses a 5 nm TSMC process, but its transistor count is unknown and its die size is 382 mm², with no density figure recorded.

The B300 SXM6 AC integrates 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. The N1X 48SM has 6,144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 192 tensor cores. The N1X 48SM includes ray tracing cores, whereas the B300 SXM6 AC has no RT core count listed. The B300 SXM6 AC memory subsystem uses 288 GB of HBM3e on an 8192-bit bus, delivering 8.19 TB/s bandwidth. The N1X 48SM uses 128 GB of LPDDR5X on a 256-bit bus, with 273.2 GB/s bandwidth. Clock behavior differs substantially: the B300 SXM6 AC has a base clock of 1665 MHz and a boost of 2032 MHz, while the N1X 48SM has a base of 741 MHz and a boost of 2346 MHz. The N1X 48SM reaches a higher boost clock, but the B300 SXM6 AC operates at a much higher base frequency.

Memory clock also differs: the B300 SXM6 AC runs at 2000 MHz (8 Gbps effective), while the N1X 48SM runs at 1067 MHz (8.5 Gbps effective). The B300 SXM6 AC supports PCIe 6.0 x16, whereas the N1X 48SM uses PCIe 5.0 x16. Display outputs differ as well: the B300 SXM6 AC has no outputs, while the N1X 48SM has 1x HDMI.

Head-to-Head Benchmarks

The head-to-head benchmark table is empty, so there are no direct comparative scores in the database. The only recorded benchmark for the B300 SXM6 AC is Geekbench OpenCL with a score of 369,831. The N1X 48SM has no benchmark entries and an average score of 0. The percentile data reinforces the gap: the B300 SXM6 AC ranks at the 100th percentile of all GPUs, while the N1X 48SM ranks at the 50th percentile.

Compared to its nearest rivals, the B300 SXM6 AC leads the NVIDIA B200 by 7% (B200 average score 345,482), the NVIDIA H200 NVL by 10.4% (H200 NVL average score 334,891), the AMD Instinct MI300X by 16.3% (MI300X average score 317,994), and the NVIDIA L40S by 25% (L40S average score 295,763). These deltas come from the recorded data and show the B300 SXM6 AC as the fastest among those measured parts. The N1X 48SM has no rivals listed, so no comparative analysis is possible.

The B300 SXM6 AC also shows a large raw performance advantage in theoretical throughput. Its FP32 compute is 76.99 TFLOPS, and its FP16 is also 76.99 TFLOPS (1:1 ratio). The N1X 48SM delivers 28.83 TFLOPS in both FP32 and FP16 (1:1). That puts the B300 SXM6 AC at roughly 2.7 times the FP32 throughput of the N1X 48SM, a factor derived from the listed numbers. Pixel and texture rates follow the same direction: the B300 SXM6 AC reaches 48.77 GPixel/s and 1,202.9 GTexel/s, while the N1X 48SM reaches 112.6 GPixel/s and 900.9 GTexel/s. The N1X 48SM actually has a higher pixel rate, despite the lower overall compute, because it has 48 ROPs versus 24 on the B300 SXM6 AC.

FAQ

Q: Which GPU has the higher benchmark score?

A: The B300 SXM6 AC has a recorded Geekbench OpenCL score of 369,831, placing it in the 100th percentile. The N1X 48SM has no recorded benchmark scores and sits at the 50th percentile.

Q: What memory configurations do the two GPUs use?

A: The B300 SXM6 AC uses 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The N1X 48SM uses 128 GB of LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth.

Q: How do their FP32 compute capabilities compare?

A: The B300 SXM6 AC delivers 76.99 TFLOPS FP32, while the N1X 48SM delivers 28.83 TFLOPS FP32. Both support FP16 at a 1:1 ratio with the same respective numbers.

Q: Do either of these GPUs support ray tracing?

A: The N1X 48SM includes 48 RT cores. The B300 SXM6 AC does not list an RT core count in the database.

Q: What is the difference in pixel throughput?

A: The N1X 48SM has a higher pixel rate at 112.6 GPixel/s, compared to the B300 SXM6 AC at 48.77 GPixel/s. This is despite the B300 SXM6 AC having a much higher overall compute throughput.

Q: What are the power requirements?

A: The B300 SXM6 AC has a TDP of 1100 W and a suggested PSU of 1500 W. The N1X 48SM has no TDP listed and no power connectors, operating as an IGP.

Where Each One Wins

The B300 SXM6 AC wins in raw compute performance, memory capacity, and memory bandwidth. Its 76.99 TFLOPS FP32 and FP16 throughput, 288 GB HBM3e, and 8.19 TB/s bandwidth make it suited for large-scale server workloads, AI training, and high-bandwidth data processing. It also holds the 100th percentile ranking and leads every listed rival by at least 7%, including the B200 and H200 NVL. Its base clock of 1665 MHz and boost of 2032 MHz are higher than the N1X 48SM base clock, and its PCIe 6.0 x16 interface is a generation ahead. The B300 SXM6 AC also has a much larger die at 1628 mm² and a transistor count of 208,000 million, indicating a high-complexity compute part.

The N1X 48SM wins in specific areas that reflect an integrated design. It has 48 ROPs, giving it a higher pixel rate of 112.6 GPixel/s versus 48.77 GPixel/s on the B300 SXM6 AC. It also has 48 RT cores, which the B300 SXM6 AC lacks. Its boost clock reaches 2346 MHz, higher than the B300 SXM6 AC boost of 2032 MHz, and its memory runs at 8.5 Gbps effective versus 8 Gbps effective. The N1X 48SM has a 382 mm² die, which is smaller, and it uses LPDDR5X, a lower-power memory type. It has a 1x HDMI output, making it usable for display output, while the B300 SXM6 AC has no outputs. The N1X 48SM also uses PCIe 5.0 x16, which is still a current interface but one generation behind the B300 SXM6 AC.

For use-case selection: the B300 SXM6 AC is the choice for server deployments needing maximum compute, large memory pools, and extreme bandwidth. The N1X 48SM is the choice for integrated graphics scenarios where ray tracing, display output, and a smaller footprint are relevant, and where the 50th percentile ranking still indicates a mid-tier position among all GPUs.

Specification Differences

| Specification | NVIDIA B300 SXM6 AC | NVIDIA N1X 48SM |

| --- | --- | --- |

| Chip | GB110 | GB20B |

| Architecture | Blackwell Ultra | Blackwell 2.0 |

| Generation | Server Blackwell (Bxx) | Blackwell IGP (N1x) |

| Process Node | 5 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 208,000 million | unknown |

| Die Size | 1628 mm² | 382 mm² |

| Transistor Density | 127.8M / mm² | null |

| Base Clock | 1665 MHz | 741 MHz |

| Boost Clock | 2032 MHz | 2346 MHz |

| Memory Clock | 2000 MHz 8 Gbps effective | 1067 MHz 8.5 Gbps effective |

| Memory Size | 288 GB | 128 GB |

| Memory Type | HBM3e | LPDDR5X |

| Memory Bus Width | 8192 bit | 256 bit |

| Memory Bandwidth | 8.19 TB/s | 273.2 GB/s |

| Shading Units | 18944 | 6144 |

| TMUs | 592 | 384 |

| ROPs | 24 | 48 |

| RT Cores | null | 48 |

| Tensor Cores | 592 | 192 |

| Pixel Rate | 48.77 GPixel/s | 112.6 GPixel/s |

| Texture Rate | 1,202.9 GTexel/s | 900.9 GTexel/s |

| FP32 | 76.99 TFLOPS | 28.83 TFLOPS |

| FP16 | 76.99 TFLOPS (1:1) | 28.83 TFLOPS (1:1) |

| TDP | 1100 W | unknown |

| Slot Width | SXM Module | IGP |

| Power Connectors | null | None |

| Suggested PSU | 1500 W | null |

| Bus Interface | PCIe 6.0 x16 | PCIe 5.0 x16 |

| Display Outputs | No outputs | 1x HDMI |

| Release Date | 2025-09-10 | 2026-05-31 |

| Production Status | Active | Active |