NVIDIA B300 vs NVIDIA GeForce RTX 5080 SUPER Comparison

The Verdict

The data shows two radically different NVIDIA designs that share a manufacturer and a 5 nm TSMC process but little else. The B300 is a server accelerator built around the GB110 chip in Blackwell Ultra architecture, while the GeForce RTX 5080 SUPER is a client graphics card using the GB203 chip in Blackwell 2.0 architecture. Benchmark results indicate the RTX 5080 SUPER is the only one with recorded performance data, scoring 3075 in 3DMark Steel Nomad DX12, which places it at the 19th percentile of all GPUs in the database. The B300 has no recorded benchmarks and sits at the 50th percentile by default, making direct performance comparison impossible from the recorded data. The B300 is for compute environments requiring massive memory capacity and FP16 throughput, while the RTX 5080 SUPER is for desktop systems needing display outputs and standard graphics APIs.

Architecture Differences

The B300 uses the GB110 chip built on Blackwell Ultra architecture, classified in the Server Blackwell generation. The RTX 5080 SUPER uses the GB203 chip in Blackwell 2.0 architecture, belonging to the GeForce 50-series. Both are fabricated by TSMC on a 5 nm process, but transistor counts differ substantially: the B300 packs 104,000 million transistors, while the RTX 5080 SUPER has 45,600 million. The RTX 5080 SUPER has a recorded die size of 378 mm² with a transistor density of 120.6M per mm²; the B300 has no die size recorded.

Memory architecture separates these products completely. The B300 carries 144 GB of HBM3e across a 4096-bit bus, delivering 4.10 TB/s of bandwidth. The RTX 5080 SUPER has 24 GB of GDDR7 on a 256-bit bus, with 1.02 TB/s bandwidth. Both run memory at 2000 MHz, but the B300 achieves 8 Gbps effective while the RTX 5080 SUPER reaches 32 Gbps effective.

Compute resources differ in scale and configuration. The B300 has 18,944 shading units, 592 TMUs, and only 24 ROPs, with 592 tensor cores and no RT core count recorded. The RTX 5080 SUPER has 10,752 shading units, 336 TMUs, 112 ROPs, 84 RT cores, and 336 tensor cores. FP32 throughput favors the B300 at 76.99 TFLOPS versus 56.28 TFLOPS for the RTX 5080 SUPER. FP16 performance reveals a massive divergence: the B300 delivers 1,231.8 TFLOPS using a 16:1 ratio, while the RTX 5080 SUPER provides 56.28 TFLOPS at 1:1.

Form factor and power requirements are also distinct. The B300 is an SXM Module with a 1400 W TDP and requires an 1800 W suggested PSU. The RTX 5080 SUPER is a dual-slot card measuring 304 mm in length, 137 mm in height, and 40 mm in width, with a 415 W TDP and a single 16-pin power connector. The B300 has no display outputs, while the RTX 5080 SUPER offers 1x HDMI 2.1b and 3x DisplayPort 2.1b. The RTX 5080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4; the B300 has no API support recorded. Both use PCIe 5.0 x16.

FAQ

Q: Which GPU has more memory bandwidth?

A: The B300 provides 4.10 TB/s of bandwidth through 144 GB of HBM3e on a 4096-bit bus. The RTX 5080 SUPER delivers 1.02 TB/s using 24 GB of GDDR7 on a 256-bit bus.

Q: Can the B300 connect to displays?

A: No. The B300 has no display outputs recorded. The RTX 5080 SUPER has 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs.

Q: What is the FP16 performance difference?

A: The B300 achieves 1,231.8 TFLOPS FP16 at a 16:1 ratio, while the RTX 5080 SUPER provides 56.28 TFLOPS FP16 at 1:1. The B300's FP16 figure is roughly 21.9 times higher.

Q: Which card has a higher boost clock?

A: The RTX 5080 SUPER boosts to 2617 MHz, while the B300 boosts to 2032 MHz. The RTX 5080 SUPER also has a higher base clock at 2295 MHz versus 1665 MHz.

Q: What power supply is recommended for each?

A: The B300 has a 1400 W TDP and a suggested PSU of 1800 W. The RTX 5080 SUPER has a 415 W TDP with no suggested PSU recorded.

Q: How does the RTX 5080 SUPER compare to its nearest rivals?

A: The recorded data shows the RTX 5080 SUPER scores 3075 in 3DMark Steel Nomad DX12. It trails the NVIDIA Quadro P1000 by 2.8% (3163 score) and the Intel Arc Pro B60 by 3.4% (3182 score), while leading the NVIDIA GeForce 820A by 3.1% (2983 score) and the NVIDIA GeForce GTX 860M by 3.6% (2967 score).

Specification Differences

| Specification | NVIDIA B300 | NVIDIA GeForce RTX 5080 SUPER |

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

| Chip | GB110 | GB203 |

| Architecture | Blackwell Ultra | Blackwell 2.0 |

| Generation | Server Blackwell (Bxx) | GeForce 50 |

| Transistors | 104,000 million | 45,600 million |

| Die Size | Not recorded | 378 mm² |

| Transistor Density | Not recorded | 120.6M / mm² |

| Base Clock | 1665 MHz | 2295 MHz |

| Boost Clock | 2032 MHz | 2617 MHz |

| Memory Effective Speed | 8 Gbps | 32 Gbps |

| Memory Size | 144 GB | 24 GB |

| Memory Type | HBM3e | GDDR7 |

| Memory Bus Width | 4096 bit | 256 bit |

| Memory Bandwidth | 4.10 TB/s | 1.02 TB/s |

| Shading Units | 18,944 | 10,752 |

| TMUs | 592 | 336 |

| ROPs | 24 | 112 |

| RT Cores | Not recorded | 84 |

| Tensor Cores | 592 | 336 |

| Pixel Rate | 48.77 GPixel/s | 293.1 GPixel/s |

| Texture Rate | 1,202.9 GTexel/s | 879.3 GTexel/s |

| FP32 | 76.99 TFLOPS | 56.28 TFLOPS |

| FP16 | 1,231.8 TFLOPS (16:1) | 56.28 TFLOPS (1:1) |

| TDP | 1400 W | 415 W |

| Slot Width | SXM Module | Dual-slot |

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

| Suggested PSU | 1800 W | Not recorded |

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

| DirectX | Not recorded | 12 Ultimate (12_2) |

| OpenGL | Not recorded | 4.6 |

| Vulkan | Not recorded | 1.4 |

| Dimensions | Not recorded | 304 mm x 137 mm x 40 mm |

| Release Date | 2025-09-10 | 2025-12-31 |

| Launch MSRP | Not recorded | 999 USD |

| Predecessor | Server Hopper | Not recorded |

| Successor | Server Rubin | Not recorded |

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between the B300 and the RTX 5080 SUPER. The B300 has zero recorded benchmark scores, and the wins counter shows 0 for both products. The only available performance data belongs to the RTX 5080 SUPER, which records a single 3DMark Steel Nomad DX12 score of 3075.

That score positions the RTX 5080 SUPER at the 19th percentile of all GPUs in the database. Its nearest rivals in the recorded data are close competitors: the NVIDIA Quadro P1000 scores 3163, which is 2.8% higher, and the Intel Arc Pro B60 scores 3182, 3.4% higher. Below it, the NVIDIA GeForce 820A scores 2983 (3.1% lower) and the NVIDIA GeForce GTX 860M scores 2967 (3.6% lower). This places the RTX 5080 SUPER in a tight cluster where a 3.6% swing separates the lowest from the highest recorded scores among its nearest rivals.

The B300, by contrast, has no benchmark scores in the database. Its percentile of 50 reflects a default position rather than measured performance. The FP32 and FP16 compute figures from the specification data suggest the B300 would outperform the RTX 5080 SUPER in raw compute workloads, with 76.99 TFLOPS FP32 versus 56.28 TFLOPS, and 1,231.8 TFLOPS FP16 versus 56.28 TFLOPS. The B300 also leads in texture rate at 1,202.9 GTexel/s versus 879.3 GTexel/s. However, the RTX 5080 SUPER leads in pixel rate at 293.1 GPixel/s versus 48.77 GPixel/s, reflecting its much higher ROP count of 112 versus 24.

Where Each One Wins

The B300 wins in compute-heavy server workloads. Its 144 GB HBM3e memory with 4.10 TB/s bandwidth provides vastly more capacity and bandwidth than the RTX 5080 SUPER's 24 GB GDDR7 at 1.02 TB/s. The B300's FP16 throughput of 1,231.8 TFLOPS is orders of magnitude beyond the RTX 5080 SUPER's 56.28 TFLOPS, making it suited for AI training and inference where FP16 tensor operations dominate. Its 592 tensor cores exceed the RTX 5080 SUPER's 336, and its 18,944 shading units provide 76.99 TFLOPS FP32 versus 56.28 TFLOPS. The B300 also has a higher texture rate at 1,202.9 GTexel/s.

The RTX 5080 SUPER wins in client graphics and desktop use. It has display outputs, supporting 1x HDMI 2.1b and 3x DisplayPort 2.1b, while the B300 has no outputs. It delivers 84 RT cores for hardware ray tracing, a feature the B300 does not record. Its pixel rate of 293.1 GPixel/s is 6 times higher than the B300's 48.77 GPixel/s, driven by 112 ROPs versus 24. The RTX 5080 SUPER supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the B300 records no graphics API support. Clock speeds favor the RTX 5080 SUPER at 2295 MHz base and 2617 MHz boost, versus 1665 MHz and 2032 MHz for the B300. The RTX 5080 SUPER fits in a dual-slot 304 mm card with a 415 W TDP and a single 16-pin connector, whereas the B300 requires an SXM Module form factor with a 1400 W TDP and an 1800 W suggested PSU.

The B300 is the only recorded benchmark performer in this comparison, scoring 3075 in 3DMark Steel Nomad DX12. That score places it near the NVIDIA Quadro P1000 and Intel Arc Pro B60, while leading older mobile parts like the GeForce 820A and GTX 860M. The B300 has no recorded benchmark data, so its real-world performance remains unmeasured in the database. The release dates place the B300 earlier at 2025-09-10, with the RTX 5080 SUPER following at 2025-12-31. The RTX 5080 SUPER has a launch MSRP of 999 USD, while the B300 has no launch price recorded. The B300 lists Server Hopper as its predecessor and Server Rubin as its successor, while the RTX 5080 SUPER records neither.