NVIDIA B200 vs NVIDIA RTX A4500 Comparison

# The Verdict

The data places these two accelerators in completely different tiers. The NVIDIA B200 is a server-class compute accelerator with a 100th percentile ranking across all GPUs in the database, while the NVIDIA RTX A4500 is a workstation card sitting at the 93rd percentile. In the head-to-head OpenCL benchmark, the B200 dominates by 143.6%, a gap so large that the two products are not competing for the same buyer. The B200 wins the only benchmark where both appear, and it holds every absolute performance advantage in the recorded specs. The RTX A4500 is the choice for a workstation environment where power limits and slot width matter, while the B200 is the pick for maximum compute throughput in a server chassis with an SXM slot.

# Architecture Differences

The two products come from different architectural families within NVIDIA's lineup. The B200 uses the GB100 chip on the Blackwell architecture, built on a 5 nm process at TSMC. It packs 104,000 million transistors into the package. The RTX A4500 uses the GA102 chip on the Ampere architecture, fabricated by Samsung on an 8 nm node, with 28,300 million transistors. The transistor density tells the story: the B200 crams roughly 2.3 times as many transistors per square millimeter as the A4500.

The memory subsystems are just as divergent. The B200 carries 90 GB of HBM3e on a 4096-bit bus, yielding 4.10 TB/s of bandwidth. The A4500 has 20 GB of GDDR6 on a 320-bit interface, for 640.0 GB/s. The difference in memory type alone also changes the physical profile: the B200 is an SXM Module with a 1000 W TDP, whereas the A4500 is a dual-slot card with a 200 W TDP and an 8-pin power connector. The B200 has no display outputs, while the A4500 drives four DisplayPort 1.4a outputs.

The compute resources also scale differently. The B200 carries 18,944 shading units, 592 texture mapping units and 24 ROPs, along with 592 tensor cores. The A4500 has 7,168 shaders, 224 TMUs, 96 ROPs, and 224 tensor cores. The B200 has no RT cores; the A4500 has 56. In raw throughput, the B200 reports 1,191.2 TFLOPS of FP16 (16:1) and 74.45 TFLOPS of FP32, while the A4500 reports 23.65 TFLOPS in both FP32 and FP16 at 1:1.

FAQ

Q: Which GPU is faster in raw FP32 compute?

A: The NVIDIA B200, at 74.45 TFLOPS, is 3.1x the FP32 rate of the RTX A4500 at 23.65 TFLOPS.

Q: Do these GPUs support PCIe 5.0?

A: The B200 has a PCIe 5.0 x16 interface. The RTX A4500 uses PCIe 4.0 x16.

Q: Which one has more memory bandwidth?

A: B200 with 4.10 TB/s is about 6.4x the A4500's 640.0 GB/s.

Q: Which GPU is ahead in the OpenCL database test?

A: B200 leads with 143.6% over the A4500 in the recorded geekbench_opencl benchmark.

Q: What is the production status of each card?

A: B200 is marked Active. RTX A4500 is End-of-life.

# Specification Differences

| Field | NVIDIA B200 | NVIDIA RTX A4500 |

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

| Chip | GB100 | GA102 |

| Architecture | Blackwell | Ampere |

| Process | 5 nm | 8 nm |

| Transistors | 104,000 million | 28,300 million |

| Die size | - | 628 mm² |

| Transistor density | - | 45.1M / mm² |

| Base clock | 700 MHz | 1050 MHz |

| Boost clock | 1965 MHz | 1650 MHz |

| Memory | 90 GB HBM3e | 20 GB GDDR6 |

| Memory bus | 4096 bit | 320 bit |

| Memory bandwidth | 4.10 TB/s | 640.0 GB/s |

| Shading units | 18944 | 7168 |

| Tensor cores | 592 | 224 |

| Texture units | 592 | 224 |

| ROPs | 24 | 96 |

| RT cores | - | 56 |

| FP32 | 74.45 TFLOPS | 23.65 TFLOPS |

| FP16 | 1,191.2 TFLOPS (16:1) | 23.65 TFLOPS (1:1) |

| Slot width | SXM Module | Dual-slot |

| Power connector | - | 1x 8-pin |

| Suggested PSU | 1400 W | 550 W |

| Bus interface | PCIe 5.0 x16 | PCIe 4.0 x16 |

| Display outputs | None | 4x DisplayPort 1.4a |

Head-to-Head Benchmarks

The only directly comparable benchmark in the database is the geekbench_opencl test. The B200 records 345,482, while the A4500 records 141,837. That is a 143.6% margin in favor of the B200, the largest single-test margin in this comparison. Across the broader database, the B200 sits at the 100th percentile against all GPUs, while the A4500 sits at the 93rd percentile. The B200 is also 3.2% ahead of the NVIDIA H200 NVL in its average score (334,891), and 6.6% behind the NVIDIA B300 SXM AC (369,831). Against the AMD Instinct MI300X, the B200 leads by 8.6% (317,994), and against the NVIDIA L40S it leads by 16.8% (295,763).

The RTX A4500's closest rivals in the database are the NVIDIA A200 Mobile, which scores 91,134 on average, 0.6% behind, the AMD Radeon Instinct MI60 at 92,466 (0.9% behind), the NVIDIA Quadro GP100 at 87,445 (4.8% behind), and the AMD Radeon PRO W7600 at 87,108 (5.2% behind). The A4500 ranks in the 93rd percentile of all GPUs.

For the A4500, the single recorded win in the head-to-head data is the geekbench_opencl test, where it beats the B200 by 143.6%. The B200 wins the only head-to-head test. There is no multi-test suite in the shared database, so the summary of wins is 1 for the B200 and 0 for the A4500.