NVIDIA B300 SXM6 AC vs NVIDIA Quadro RTX 6000 Comparison

# NVIDIA B300 SXM6 AC vs NVIDIA Quadro RTX 6000

The NVIDIA B300 SXM6 AC and NVIDIA Quadro RTX 6000 occupy entirely different tiers of the GPU landscape. The B300 SXM6 AC is a server-class Blackwell Ultra accelerator with a Geekbench OpenCL score of 369,831, placing it at the 100th percentile of all GPUs. The Quadro RTX 6000, a Turing-era workstation card, scores 74,179 in OpenCL and 129,564 in Vulkan, averaging 101,872 and sitting at the 94th percentile. The recorded data shows a 398.6% performance gap in OpenCL, a chasm that reflects their divergent purposes: the B300 targets massive compute workloads, while the RTX 6000 serves professional visualization with display outputs and broad API support.

Where Each One Wins

The B300 SXM6 AC wins decisively in raw compute. Its OpenCL score of 369,831 is 398.6% ahead of the RTX 6000's 74,179 in the head-to-head benchmark. This advantage extends across the board: the B300 leads its nearest rival, the NVIDIA B200, by 7%, the H200 NVL by 10.4%, the AMD Instinct MI300X by 16.3%, and the L40S by 25%. For workloads dominated by FP32 throughput, memory bandwidth, or massive dataset handling, the B300 is the clear choice. It delivers 76.99 TFLOPS of FP32 performance, 8.19 TB/s of bandwidth from 288 GB of HBM3e, and a 8192-bit bus. This makes it suitable for AI training, scientific simulation, and large-scale data processing where sheer throughput matters more than anything else.

The Quadro RTX 6000 wins in a different domain: workstation integration. It is the only one of the two with display outputs, offering 4x DisplayPort 1.4a and 1x USB Type-C. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the B300 lists no API support. The RTX 6000 also has a dual-slot form factor and PCIe 3.0 x16, making it installable in standard workstation chassis. Its 24 GB of GDDR6 memory and 672.0 GB/s bandwidth serve professional rendering, CAD, and visualization tasks. The RTX 6000 outperforms several AMD rivals: it is 4.5% ahead of the Radeon RX 7900M, 4.9% ahead of the Radeon Pro VII, though 4.6% behind the Radeon Pro Vega II Duo and 5.1% behind the Radeon Pro W6600X. Its OpenCL score of 74,179 and Vulkan score of 129,564 show balanced performance for interactive workloads.

Architecture Differences

The B300 SXM6 AC is built on the Blackwell Ultra architecture, using the GB110 chip fabricated on a 5 nm process at TSMC. It integrates 208,000 million transistors across a 1628 mm² die, yielding a transistor density of 127.8M per mm². The GPU features 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. Its memory subsystem is extraordinary: 288 GB of HBM3e on a 8192-bit bus, delivering 8.19 TB/s of bandwidth. The B300 operates at a base clock of 1665 MHz and a boost clock of 2032 MHz, with memory running at 2000 MHz (8 Gbps effective). Its peak rates include 48.77 GPixel/s pixel fill and 1,202.9 GTexel/s texture fill. The FP32 throughput is 76.99 TFLOPS, which is also the FP16 rate at a 1:1 ratio. The TDP is 1100 W with a suggested PSU of 1500 W, and it uses an SXM module slot with PCIe 6.0 x16. It has no display outputs and no API support listed.

The Quadro RTX 6000 uses the Turing architecture with the TU102 chip on a 12 nm process, also from TSMC. It contains 18,600 million transistors on a 754 mm² die, giving a density of 24.7M per mm². The GPU has 4,608 shading units, 288 TMUs, 96 ROPs, 72 RT cores, and 576 tensor cores. Memory is 24 GB of GDDR6 on a 384-bit bus, providing 672.0 GB/s. Clocks are 1440 MHz base and 1770 MHz boost, with memory at 1750 MHz (14 Gbps effective). Pixel rate is 169.9 GPixel/s, texture rate is 509.8 GTexel/s, FP32 is 16.31 TFLOPS, and FP16 is 32.62 TFLOPS at a 2:1 ratio. The TDP is 260 W with a suggested PSU of 600 W. It uses a dual-slot design with 1x 6-pin and 1x 8-pin power connectors, measures 267 mm by 111 mm, and connects via PCIe 3.0 x16.

Head-to-Head Benchmarks

The only shared benchmark in the database is Geekbench OpenCL, where the B300 SXM6 AC scores 369,831 against the RTX 6000's 74,179. The delta is 398.6%, meaning the B300 delivers nearly five times the OpenCL performance. This is not a marginal improvement; it is a generational leap. The B300's score places it at the 100th percentile of all GPUs, while the RTX 6000 sits at the 94th percentile. In practical terms, the B300 completes compute tasks in a fraction of the time, assuming the workload can utilize its architecture.

For the RTX 6000, its Vulkan score of 129,564 provides additional context. This is 74.6% higher than its OpenCL score, indicating strong performance in graphics-oriented APIs. The B300 has no Vulkan benchmark recorded, so direct comparison is unavailable. However, the RTX 6000's Vulkan result shows it handles interactive rendering and real-time workloads better than its OpenCL score might suggest. The RTX 6000's nearest rivals in the database are all AMD cards, with the Radeon Pro Vega II Duo 4.6% ahead and the Radeon Pro W6600X 5.1% ahead, while the RX 7900M and Pro VII trail by 4.5% and 4.9% respectively.

FAQ

Q: Which GPU has higher raw compute performance?

A: The NVIDIA B300 SXM6 AC. Its Geekbench OpenCL score of 369,831 is 398.6% higher than the Quadro RTX 6000's 74,179, and its FP32 throughput of 76.99 TFLOPS dwarfs the RTX 6000's 16.31 TFLOPS.

Q: Can the Quadro RTX 6000 output video?

A: Yes. The RTX 6000 has 4x DisplayPort 1.4a and 1x USB Type-C outputs. The B300 SXM6 AC has no display outputs, making it unsuitable for direct monitor connection.

Q: What are the memory capacities and types?

A: The B300 SXM6 AC has 288 GB of HBM3e on a 8192-bit bus with 8.19 TB/s bandwidth. The Quadro RTX 6000 has 24 GB of GDDR6 on a 384-bit bus with 672.0 GB/s bandwidth.

Q: Which GPU supports more APIs?

A: The Quadro RTX 6000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B300 SXM6 AC lists no API support in the database.

Q: How do the B300's rivals compare?

A: The B300 leads the NVIDIA B200 by 7%, the H200 NVL by 10.4%, the AMD Instinct MI300X by 16.3%, and the L40S by 25% in average benchmark score.

Q: What is the power requirement difference?

A: The B300 SXM6 AC has a TDP of 1100 W and requires a suggested PSU of 1500 W. The Quadro RTX 6000 has a TDP of 260 W with a suggested PSU of 600 W.

Specification Differences

| Specification | NVIDIA B300 SXM6 AC | NVIDIA Quadro RTX 6000 |

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

| Architecture | Blackwell Ultra | Turing |

| Chip | GB110 | TU102 |

| Process Node | 5 nm | 12 nm |

| Transistors | 208,000 million | 18,600 million |

| Die Size | 1628 mm² | 754 mm² |

| Transistor Density | 127.8M / mm² | 24.7M / mm² |

| Base Clock | 1665 MHz | 1440 MHz |

| Boost Clock | 2032 MHz | 1770 MHz |

| Memory Clock | 2000 MHz 8 Gbps effective | 1750 MHz 14 Gbps effective |

| Memory Size | 288 GB | 24 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus | 8192 bit | 384 bit |

| Memory Bandwidth | 8.19 TB/s | 672.0 GB/s |

| Shading Units | 18,944 | 4,608 |

| TMUs | 592 | 288 |

| ROPs | 24 | 96 |

| RT Cores | Not listed | 72 |

| Tensor Cores | 592 | 576 |

| Pixel Rate | 48.77 GPixel/s | 169.9 GPixel/s |

| Texture Rate | 1,202.9 GTexel/s | 509.8 GTexel/s |

| FP32 | 76.99 TFLOPS | 16.31 TFLOPS |

| FP16 | 76.99 TFLOPS (1:1) | 32.62 TFLOPS (2:1) |

| TDP | 1100 W | 260 W |

| Slot Width | SXM Module | Dual-slot |

| Power Connectors | Not listed | 1x 6-pin + 1x 8-pin |

| Suggested PSU | 1500 W | 600 W |

| Bus Interface | PCIe 6.0 x16 | PCIe 3.0 x16 |

| Display Outputs | No outputs | 4x DisplayPort 1.4a, 1x USB Type-C |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not listed | 267 mm x 111 mm |

| Release Date | 2025-09-10 | 2018-08-12 |

| Production Status | Active | End-of-life |

| Predecessor | Server Hopper | Quadro Volta |

| Successor | Server Rubin | Workstation Ampere |

The Verdict

The data points to a clear split: the NVIDIA B300 SXM6 AC is for compute-heavy server environments where raw throughput is paramount. Its 398.6% OpenCL lead over the RTX 6000, combined with 288 GB of HBM3e and 8.19 TB/s bandwidth, makes it the choice for AI training, large-scale simulations, and data center workloads. The 100th percentile ranking confirms it is at the top of the database's performance hierarchy. The RTX 6000, while far behind in compute, remains relevant for professional workstations that need display outputs, API compatibility, and moderate power consumption. Its Turing architecture supports RT cores and a broad API set, making it suitable for CAD, rendering, and visualization tasks where interactive feedback matters. The RTX 6000's end-of-life status and 260 W TDP contrast with the B300's active production and 1100 W requirement, reinforcing that these are products for different segments rather than direct competitors. For users needing maximum compute, the B300 is the only option. For those needing a workstation GPU with visual output, the RTX 6000 is the functional choice.