NVIDIA B300 SXM6 AC vs NVIDIA GeForce RTX 4080 SUPER Comparison

NVIDIA B300 SXM6 AC and NVIDIA GeForce RTX 4080 SUPER occupy distant corners of the GPU landscape, one a server accelerator aimed at massive compute workloads, the other a consumer graphics card built for high-refresh gaming and creative tasks. The recorded data shows a stark contrast in nearly every measurable category, from memory capacity to shading units to benchmark scores, yet both serve distinct purposes within their respective domains. The B300 SXM6 AC posts a Geekbench OpenCL score of 369,831, while the RTX 4080 SUPER records 219,065 in the same test, a difference that underscores their divergent design philosophies rather than a simple hierarchy of capability.

Head-to-Head Benchmarks

The only direct benchmark comparison available in the database is the Geekbench OpenCL test, which measures raw compute throughput across a wide range of workloads. The B300 SXM6 AC delivers a score of 369,831, while the RTX 4080 SUPER manages 219,065. This translates to a 68.8% advantage for the server accelerator, a substantial gap that reflects the fundamental architectural priorities of each product. The B300 is engineered for sustained, parallel-heavy computation typical of AI training and scientific simulation, whereas the RTX 4080 SUPER balances compute with graphics rendering features that the B300 lacks entirely.

Contextualizing these scores against their nearest rivals provides additional clarity. The B300 sits at the 100th percentile among all GPUs in the database, meaning no other recorded card surpasses its average benchmark score. Its nearest competitor, the NVIDIA B200, trails by 7%, scoring 345,482. The H200 NVL follows at 334,891, a 10.4% deficit, while AMD Instinct MI300X reaches 317,994, 16.3% behind. The L40S, another NVIDIA server part, scores 295,763, a 25% gap. These deltas show the B300 as the clear leader in its class, with margins that widen steadily against each successive rival.

The RTX 4080 SUPER, by contrast, holds the 86th percentile across all GPUs, a strong position for a consumer card but not a top-tier one. Its nearest rivals cluster closely around its average score of 54,209. The RTX 4080 scores 54,247, effectively identical at -0.1%, while the AMD Radeon Pro W5700X posts 54,828, a 1.1% edge. The Radeon RX 6750 GRE 12 GB and Radeon 8060S trail by 2.7% and 2.8%, respectively, with scores of 55,698 and 55,757. This tight grouping indicates that the RTX 4080 SUPER competes in a crowded field where small performance differences separate products. The B300, however, operates in a tier where its dominance is unambiguous, with no recorded rival within single-digit percentage points.

The single head-to-head result also highlights the scale of difference between these two products. A 68.8% delta in OpenCL performance is not a marginal improvement; it represents a fundamentally different class of hardware. The B300 achieves this with a 5 nm process node, 208,000 million transistors, and 18,944 shading units, while the RTX 4080 SUPER uses the same 5 nm node but packs 45,900 million transistors and 10,240 shading units. The compute resources are not merely larger on the B300; they are organized around a different goal, prioritizing raw throughput over the graphics-specific pipelines that dominate consumer workloads.

Architecture Differences

The architectural split between these two GPUs is pronounced. The B300 SXM6 AC uses the GB110 chip, built on the Blackwell Ultra architecture, and belongs to the Server Blackwell (Bxx) generation. The RTX 4080 SUPER uses the AD103 chip, built on Ada Lovelace, and sits in the GeForce 40-series. Both are fabricated on a 5 nm process at TSMC, but the similarities end there. The B300 integrates 208,000 million transistors across a 1,628 mm² die, yielding a transistor density of 127.8 million per square millimeter. The RTX 4080 SUPER contains 45,900 million transistors on a 379 mm² die, with a density of 121.1 million per square millimeter. The B300 die is more than four times larger and holds over four times the transistor count, a scale that supports its enormous memory subsystem and compute array.

Memory configurations diverge completely. The B300 carries 288 GB of HBM3e across an 8,192-bit bus, delivering 8.19 TB/s of bandwidth. The RTX 4080 SUPER uses 16 GB of GDDR6X on a 256-bit bus, achieving 736.3 GB/s. The B300 memory bandwidth is over eleven times higher, a necessity for feeding its compute units during large-scale matrix operations. The RTX 4080 SUPER, with its far smaller memory pool, targets workloads where 16 GB is sufficient and bandwidth demands are modest by comparison. Clock speeds also differ, with the B300 base at 1,665 MHz and boost at 2,032 MHz, while the RTX 4080 SUPER runs higher at 2,295 MHz base and 2,550 MHz boost. Memory clocks show the same pattern: 2,000 MHz (8 Gbps effective) on the B300 versus 1,438 MHz (23 Gbps effective) on the RTX 4080 SUPER.

Compute resources reveal the B300’s server focus. It offers 18,944 shading units, 592 texture mapping units, and 592 tensor cores, but only 24 raster operation units. The RTX 4080 SUPER counters with 10,240 shading units, 320 TMUs, 112 ROPs, 80 RT cores, and 320 tensor cores. The B300 has no RT cores listed, and its pixel rate of 48.77 GPixel/s is far below the RTX 4080 SUPER’s 285.6 GPixel/s. Texture rate tells a different story: the B300 reaches 1,202.9 GTexel/s, while the RTX 4080 SUPER manages 816.0 GTexel/s. FP32 throughput favors the B300 at 76.99 TFLOPS versus 52.22 TFLOPS, with FP16 also at 76.99 TFLOPS (1:1) on the B300, versus 52.22 TFLOPS (1:1) on the RTX 4080 SUPER. The absence of RT cores and the low ROP count on the B300 confirm that it is not designed for rasterized graphics or ray tracing, while the RTX 4080 SUPER includes full support for both.

The B300 lacks display outputs entirely, uses a PCIe 6.0 x16 interface, and has no DirectX, OpenGL, or Vulkan API support. The RTX 4080 SUPER provides 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs, operates on PCIe 4.0 x16, and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Power requirements reinforce the positioning: the B300 draws a TDP of 1,100 W with a suggested PSU of 1,500 W, while the RTX 4080 SUPER consumes 320 W with a 700 W suggested PSU. The B300 is a triple-slot SXM module in physical form, whereas the RTX 4080 SUPER is a triple-slot card measuring 310 mm in length, 140 mm in height, and 61 mm in width, with a single 16-pin power connector.

Where Each One Wins

The B300 SXM6 AC wins decisively in compute-heavy scenarios. Its 76.99 TFLOPS FP32 and FP16 performance, combined with 8.19 TB/s memory bandwidth and 288 GB of HBM3e, positions it for AI training, large language model inference, and scientific simulations that require massive datasets to reside in memory. The Geekbench OpenCL score of 369,831, a 68.8% lead over the RTX 4080 SUPER, confirms its edge in parallel compute tasks. The 100th percentile ranking among all GPUs further validates that no other recorded accelerator matches its average benchmark output. Its 592 tensor cores and 1,202.9 GTexel/s texture rate support workloads that stress continuous, high-volume arithmetic.

The RTX 4080 SUPER wins in graphics-oriented tasks, despite lacking any direct benchmark comparison in the database beyond OpenCL. Its 112 ROPs, 80 RT cores, and 285.6 GPixel/s pixel rate indicate strong rasterization and ray tracing capabilities, supported by DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 APIs. The card also offers display outputs, making it usable for gaming, content creation, and professional graphics work. Its higher clock speeds, 2,550 MHz boost versus 2,032 MHz on the B300, benefit latency-sensitive workloads that do not scale across thousands of cores. The RTX 4080 SUPER also wins on power efficiency in a practical sense, with a 320 W TDP versus 1,100 W, though the B300’s higher power draw is expected given its performance class.

The B300 also wins in memory capacity and bandwidth. The 288 GB pool is 18 times larger than the RTX 4080 SUPER’s 16 GB, and the 8.19 TB/s bandwidth is over eleven times higher. This allows the B300 to handle models and datasets that would overflow the consumer card’s memory entirely. The RTX 4080 SUPER wins in physical practicality, fitting into standard PC cases with a 310 mm length and triple-slot width, while the B300 requires a server chassis designed for SXM modules.

FAQ

Q: How much faster is the B300 SXM6 AC than the RTX 4080 SUPER in OpenCL?

A: The B300 scores 369,831 versus 219,065 for the RTX 4080 SUPER, a 68.8% advantage.

Q: What memory configurations do these GPUs use?

A: The B300 has 288 GB of HBM3e on an 8,192-bit bus with 8.19 TB/s bandwidth. The RTX 4080 SUPER has 16 GB of GDDR6X on a 256-bit bus with 736.3 GB/s bandwidth.

Q: Which GPU supports ray tracing?

A: The RTX 4080 SUPER includes 80 RT cores and supports DirectX 12 Ultimate. The B300 has no recorded RT cores and no graphics API support.

Q: What are the transistor counts for each chip?

A: The B300 uses 208,000 million transistors on a 1,628 mm² die. The RTX 4080 SUPER uses 45,900 million transistors on a 379 mm² die.

Q: How do the power requirements compare?

A: The B300 has a TDP of 1,100 W with a 1,500 W suggested PSU. The RTX 4080 SUPER has a 320 W TDP with a 700 W suggested PSU.

Q: What is the release timeline for these products?

A: The RTX 4080 SUPER launched on 2024-01-30 and is marked end-of-life. The B300 launched on 2025-09-10 and is listed as active in production.

The Verdict

The data shows two products with no meaningful overlap in target use. The B300 SXM6 AC is a server accelerator with a 100th percentile benchmark ranking, delivering 76.99 TFLOPS FP32 performance, 288 GB of HBM3e memory, and an 8.19 TB/s memory bus. It leads its nearest rival, the B200, by 7% and extends that margin to 25% against the L40S. For workloads that demand maximum compute throughput and vast memory capacity, the B300 is the clear choice, though it requires a server platform, 1,100 W of power, and offers no display outputs or graphics API support.

The RTX 4080 SUPER, at the 86th percentile, offers a different set of strengths. Its 52.22 TFLOPS FP32 performance, 112 ROPs, 80 RT cores, and 285.6 GPixel/s pixel rate support gaming and graphics workloads that the B300 cannot handle. It also provides display outputs and full API support, making it a versatile consumer card. Its nearest rivals are tightly clustered, with the RTX 4080 within 0.1% and the Radeon Pro W5700X just 1.1% ahead, indicating a competitive segment where the RTX 4080 SUPER holds its ground. The choice between these two GPUs depends entirely on the workload: the B300 for compute-heavy server tasks, the RTX 4080 SUPER for graphics and general-purpose consumer use.

Specification Differences

The following fields differ between the two products:

| Specification | NVIDIA B300 SXM6 AC | NVIDIA GeForce RTX 4080 SUPER |

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

| Chip | GB110 | AD103 |

| Architecture | Blackwell Ultra | Ada Lovelace |

| Generation | Server Blackwell (Bxx) | GeForce 40 |

| Transistors | 208,000 million | 45,900 million |

| Die Size | 1,628 mm² | 379 mm² |

| Transistor Density | 127.8M / mm² | 121.1M / mm² |

| Base Clock | 1,665 MHz | 2,295 MHz |

| Boost Clock | 2,032 MHz | 2,550 MHz |

| Memory Clock | 2,000 MHz (8 Gbps effective) | 1,438 MHz (23 Gbps effective) |

| Memory Size | 288 GB | 16 GB |

| Memory Type | HBM3e | GDDR6X |

| Memory Bus Width | 8,192 bit | 256 bit |

| Memory Bandwidth | 8.19 TB/s | 736.3 GB/s |

| Shading Units | 18,944 | 10,240 |

| TMUs | 592 | 320 |

| ROPs | 24 | 112 |

| RT Cores | N/A | 80 |

| Tensor Cores | 592 | 320 |

| Pixel Rate | 48.77 GPixel/s | 285.6 GPixel/s |

| Texture Rate | 1,202.9 GTexel/s | 816.0 GTexel/s |

| FP32 | 76.99 TFLOPS | 52.22 TFLOPS |

| FP16 | 76.99 TFLOPS (1:1) | 52.22 TFLOPS (1:1) |

| TDP | 1,100 W | 320 W |

| Slot Width | SXM Module | Triple-slot |

| Power Connectors | Not specified | 1x 16-pin |

| Suggested PSU | 1,500 W | 700 W |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x16 |

| Display Outputs | No outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not specified | 310 mm x 140 mm x 61 mm |

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

| Release Date | 2025-09-10 | 2024-01-30 |

| Predecessor | Server Hopper | GeForce 30 |

| Successor | Server Rubin | GeForce 50 |

| Launch MSRP | Not specified | 999 USD |