NVIDIA B300 SXM6 AC vs NVIDIA GeForce RTX 4070 Comparison

Head-to-Head Benchmarks

The database contains exactly one shared benchmark between the NVIDIA B300 SXM6 AC and the NVIDIA GeForce RTX 4070: Geekbench OpenCL. The results are unequivocal. The B300 SXM6 AC scores 369,831 points, while the RTX 4070 scores 154,858 points. This represents a 138.8% advantage for the server-grade accelerator. In plain terms, the B300 SXM6 AC delivers more than double the OpenCL compute throughput of the RTX 4070.

The B300 SXM6 AC's raw OpenCL score places it in the 100th percentile of all GPUs in the database. Its nearest rival, the NVIDIA B200, averages 345,482 points, meaning the B300 SXM6 AC leads by 7%. The gap widens against the NVIDIA H200 NVL, which scores 334,891, a 10.4% deficit relative to the B300 SXM6 AC. The AMD Instinct MI300X trails at 317,994, a 16.3% margin, while the NVIDIA L40S lags further behind with 295,763, a 25% shortfall. These figures position the B300 SXM6 AC at the very top of the compute hierarchy.

The RTX 4070, by contrast, sits at the 81st percentile of all GPUs. Its average benchmark score across all recorded tests is 37,648. The nearest rivals in its data set are remarkably close: the NVIDIA Tesla P4 scores 37,628, a 0.1% difference; the AMD Radeon RX Vega 56 scores 37,507, a 0.4% gap; the NVIDIA GeForce RTX 4080 Mobile scores 38,135, which is 1.3% higher; and the AMD Radeon PRO W6400 scores 37,157, a 1.3% shortfall. The RTX 4070 is essentially clustered with these cards in aggregate benchmarks, though its individual test results show a broader spread.

Beyond the single head-to-head test, the RTX 4070 has its own benchmark profile. In 3DMark Steel Nomad DX12, it records 3,854 points. Geekbench Vulkan shows 174,152 points. Passmark results include 26,927 in G3D, 14,720 in GPU Compute, 1,164 in G2D, and legacy DirectX tests: 320 in DX9, 244 in DX11, 139 in DX10, and 103 in DX12. These numbers indicate a capable consumer graphics card, but they operate in a different performance stratum entirely from the B300 SXM6 AC.

The B300 SXM6 AC has only one recorded benchmark score, but that single data point is the highest in the entire database. The RTX 4070's OpenCL score of 154,858 is less than half of the B300's 369,831. The delta of 138.8% is not a marginal improvement; it is a fundamental performance tier separation. The data confirms that these two products do not compete in the same workload class.

FAQ

Q: Which GPU has the higher Geekbench OpenCL score?

A: The NVIDIA B300 SXM6 AC scores 369,831, which is 138.8% higher than the RTX 4070's 154,858.

Q: How does the B300 SXM6 AC compare to its nearest rivals?

A: It leads the NVIDIA B200 by 7%, the NVIDIA H200 NVL by 10.4%, the AMD Instinct MI300X by 16.3%, and the NVIDIA L40S by 25%.

Q: What is the RTX 4070's closest competitor in the database?

A: The NVIDIA Tesla P4, with an average score of 37,628 versus 37,648 for the RTX 4070, a 0.1% difference.

Q: Does the RTX 4070 have any benchmark where it outperforms the B300 SXM6 AC?

A: No. The only shared test is Geekbench OpenCL, and the B300 SXM6 AC wins that test outright.

Q: What is the RTX 4070's best individual benchmark score?

A: Geekbench Vulkan at 174,152 points, followed by Geekbench OpenCL at 154,858 points.

Q: What is the RTX 4070's percentile ranking among all GPUs?

A: It ranks in the 81st percentile, while the B300 SXM6 AC ranks in the 100th percentile.

Architecture Differences

The B300 SXM6 AC and RTX 4070 share a manufacturer and a process node, but nearly everything else diverges. Both use TSMC's 5 nm process, yet the silicon itself is fundamentally different. The B300 SXM6 AC is built on the GB110 chip with a Blackwell Ultra architecture, belonging to the Server Blackwell (Bxx) generation. The RTX 4070 uses the AD104 chip with an Ada Lovelace architecture, part of the GeForce 40 series.

The transistor counts reveal the scale disparity. The B300 SXM6 AC packs 208,000 million transistors on a 1628 mm² die, yielding a transistor density of 127.8 million per mm². The RTX 4070 contains 35,800 million transistors on a 294 mm² die, with a density of 121.8 million per mm². The B300's die is more than five times larger and holds nearly six times as many transistors. The density figures are similar, indicating both designs push the 5 nm process to comparable limits, but the B300's sheer physical size enables far greater compute resources.

Memory architecture could not be more different. The B300 SXM6 AC uses HBM3e memory totaling 288 GB across an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The RTX 4070 uses GDDR6X memory with 12 GB on a 192-bit bus, providing 504.2 GB/s. The bandwidth gap is roughly 16-fold in favor of the B300. Memory clock rates differ as well: the B300 runs at 2000 MHz (8 Gbps effective), while the RTX 4070 runs at 1313 MHz (21 Gbps effective). The B300 compensates for lower per-pin speeds with a vastly wider bus.

Compute resources are similarly lopsided. The B300 SXM6 AC has 18,944 shading units, 592 TMUs, and 592 tensor cores, but only 24 ROPs. The RTX 4070 has 5,888 shading units, 184 TMUs, 184 tensor cores, 46 RT cores, and 64 ROPs. The B300 has no RT cores listed, reflecting its server compute focus. Pixel rates tell a surprising story: the RTX 4070 achieves 158.4 GPixel/s, while the B300 manages only 48.77 GPixel/s. This is a direct consequence of the B300's minimal ROP count; rasterization is not its purpose. Texture rates favor the B300 at 1,202.9 GTexel/s versus 455.4 GTexel/s.

Clock speeds also differ. The B300 SXM6 AC has a base clock of 1665 MHz and a boost clock of 2032 MHz. The RTX 4070 starts at 1920 MHz and boosts to 2475 MHz. Despite lower clocks, the B300's massive shading unit count produces 76.99 TFLOPS of FP32 performance, more than double the RTX 4070's 29.15 TFLOPS. Both deliver FP16 at a 1:1 ratio with FP32.

The bus interfaces diverge: the B300 uses PCIe 6.0 x16, while the RTX 4070 uses PCIe 4.0 x16. API support is another split. The B300 lists no DirectX, OpenGL, or Vulkan support, indicating a compute-only design. The RTX 4070 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Display outputs follow the same pattern: the B300 has no outputs, while the RTX 4070 offers 1x HDMI 2.1 and 3x DisplayPort 1.4a.

The Verdict

The data draws a clear line between these two products. The NVIDIA B300 SXM6 AC is an active-production server accelerator with a 100th percentile OpenCL score of 369,831. It is designed for compute-intensive workloads, evidenced by its 288 GB HBM3e memory, 8.19 TB/s bandwidth, 76.99 TFLOPS FP32, and absence of display outputs or consumer API support. Its 1100 W TDP and PCIe 6.0 interface confirm its data-center orientation. The RTX 4070 is an end-of-life consumer graphics card with display outputs, full DirectX 12 Ultimate support, and a 200 W TDP. Its 81st percentile ranking and aggregate score of 37,648 place it in a completely different performance class.

The choice depends entirely on workload. For compute tasks that can utilize OpenCL, the B300 SXM6 AC delivers 138.8% more performance than the RTX 4070, and it outperforms its nearest rival, the B200, by 7%. The B300 also leads the H200 NVL by 10.4%, the MI300X by 16.3%, and the L40S by 25%. No consumer GPU in the database comes close to this level of compute throughput.

For graphics rendering, gaming, or any workload requiring rasterization, the RTX 4070 is the only viable option between the two. Its 158.4 GPixel/s pixel rate and 64 ROPs vastly exceed the B300's 48.77 GPixel/s and 24 ROPs. The RTX 4070 supports modern graphics APIs and has physical display outputs, none of which the B300 offers. The RTX 4070's nearest rivals in aggregate scoring, such as the Tesla P4 and RX Vega 56, are within 0.4%, indicating its performance envelope is well understood.

The production status also matters. The B300 SXM6 AC is active, while the RTX 4070 is end-of-life. The B300's successor is Server Rubin, and its predecessor is Server Hopper. The RTX 4070's successor is GeForce 50, and its predecessor is GeForce 30. Neither product is a direct replacement for the other; they serve separate markets and separate compute paradigms.

Specification Differences

The following table summarizes the key specification differences between the two GPUs, based solely on recorded data.

| Specification | NVIDIA B300 SXM6 AC | NVIDIA GeForce RTX 4070 |

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

| Chip | GB110 | AD104 |

| Architecture | Blackwell Ultra | Ada Lovelace |

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

| Process Node | 5 nm | 5 nm |

| Transistors | 208,000 million | 35,800 million |

| Die Size | 1628 mm² | 294 mm² |

| Transistor Density | 127.8M / mm² | 121.8M / mm² |

| Base Clock | 1665 MHz | 1920 MHz |

| Boost Clock | 2032 MHz | 2475 MHz |

| Memory Size | 288 GB | 12 GB |

| Memory Type | HBM3e | GDDR6X |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 8.19 TB/s | 504.2 GB/s |

| Shading Units | 18,944 | 5,888 |

| TMUs | 592 | 184 |

| ROPs | 24 | 64 |

| RT Cores | Not listed | 46 |

| Tensor Cores | 592 | 184 |

| Pixel Rate | 48.77 GPixel/s | 158.4 GPixel/s |

| Texture Rate | 1,202.9 GTexel/s | 455.4 GTexel/s |

| FP32 Performance | 76.99 TFLOPS | 29.15 TFLOPS |

| FP16 Performance | 76.99 TFLOPS (1:1) | 29.15 TFLOPS (1:1) |

| TDP | 1100 W | 200 W |

| Slot Width | SXM Module | Dual-slot |

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

| Suggested PSU | 1500 W | 550 W |

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

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

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

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Dimensions | Not listed | 240 mm length, 110 mm height, 40 mm width |

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

| Release Date | 2025-09-10 | 2023-04-11 |

| Predecessor | Server Hopper | GeForce 30 |

| Successor | Server Rubin | GeForce 50 |

| Launch MSRP | Not listed | 599 USD |

The specification sheet confirms the architectural gulf. The B300 SXM6 AC is a compute accelerator with no graphics output, no consumer API support, and a 1100 W power envelope. The RTX 4070 is a dual-slot consumer card with a 200 W TDP, full graphics API support, and physical dimensions suited for standard PC installation. The release dates are separated by over two years, with the B300 arriving in September 2025 and the RTX 4070 in April 2023. The RTX 4070 carries a launch MSRP of 599 USD, while the B300 has no listed launch MSRP. Every measurable compute specification favors the B300, while every graphics-oriented specification favors the RTX 4070.