NVIDIA A100 PCIe 80 GB vs NVIDIA RTX A4500 Comparison

Head-to-Head Benchmarks

The database contains one directly comparable benchmark between the NVIDIA A100 PCIe 80 GB and the NVIDIA RTX A4500: Geekbench OpenCL. In this test, the A100 PCIe 80 GB records a score of 207,124, while the RTX A4500 scores 141,837. The resulting delta is 46% in favor of the A100 PCIe 80 GB, a substantial margin that reflects the fundamental positioning of these two cards.

To contextualize this lead, the A100 PCIe 80 GB sits at the 99th percentile among all GPUs in the database. Its nearest rivals include the NVIDIA RTX 6000D with an average score of 195,964 (5.7% behind), the AMD Radeon PRO W7900D at 219,827 (5.8% ahead), the NVIDIA Tesla V100S PCIe 32 GB at 194,415 (6.5% behind), and the NVIDIA PG506-232 at 225,124 (8% ahead). Against this field, the A100 PCIe 80 GB's OpenCL result is competitive with the immediate tier of accelerators, trailing only the two AMD and NVIDIA offerings above it by single-digit percentages.

The RTX A4500, by contrast, holds the 93rd percentile across all GPUs. Its average benchmark score is 91,671, but this figure is pulled down by its inclusion of two additional tests: 3DMark Steel Nomad DX12 at 3,196 and Geekbench Vulkan at 129,980. The RTX A4500's nearest rivals show a tighter cluster around its performance level. The NVIDIA RTX A4500 Mobile averages 91,134 (0.6% behind), the AMD Radeon Instinct MI60 averages 92,466 (0.9% ahead), the NVIDIA Quadro GP100 averages 87,445 (4.8% behind), and the AMD Radeon PRO W7600 averages 87,108 (5.2% behind). The RTX A4500 is effectively at parity with its closest peers in the database, with deltas under 1% in either direction against the mobile variant and the MI60.

What the head-to-head data reveals is a clear stratification: the A100 PCIe 80 GB outperforms the RTX A4500 by nearly half again in the only shared test. The 46% delta is not a marginal gap; it is the difference between a high-bandwidth compute accelerator and a workstation graphics card. The A100 PCIe 80 GB's OpenCL result is also higher than two of its four nearest rivals, while the RTX A4500's OpenCL result is lower than all but one of its nearest rivals (the Quadro GP100).

Where Each One Wins

The A100 PCIe 80 GB wins in raw compute throughput, as measured by OpenCL. The 46% advantage over the RTX A4500 in Geekbench OpenCL is the single most decisive metric in the comparison. This aligns with the card's design as a server accelerator with no display outputs, meaning every transistor and memory resource is dedicated to computation rather than graphics or display management. The A100 PCIe 80 GB also holds a 99th percentile ranking across all GPUs, placing it among the top tier of any device in the database.

The RTX A4500 wins in areas that the A100 PCIe 80 GB cannot contest by design. It offers four DisplayPort 1.4a outputs, enabling direct display connectivity, while the A100 PCIe 80 GB provides no outputs at all. The RTX A4500 also supports a full API stack: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the A100 PCIe 80 GB does not list DirectX, OpenGL, or Vulkan support in the database. For graphics workloads, rendering pipelines, or any task requiring a frame buffer output, the RTX A4500 is the only viable option of the two.

The RTX A4500 also benefits from a lower power requirement. Its TDP is 200 W with a suggested power supply of 550 W, while the A100 PCIe 80 GB draws 300 W and recommends a 700 W power supply. The RTX A4500 uses a single 8-pin power connector, while the A100 PCIe 80 GB requires an 8-pin EPS connector. For systems with limited power headroom or smaller power supplies, the RTX A4500 is the more accommodating choice.

In terms of average benchmark score across all recorded tests, the RTX A4500's average is 91,671, but this includes graphics-oriented tests that the A100 PCIe 80 GB does not have recorded. The A100 PCIe 80 GB's average benchmark score is 207,124, derived solely from its OpenCL result. When comparing only the shared OpenCL test, the A100 PCIe 80 GB is decisively ahead.

Architecture Differences

Both cards are built on the Ampere architecture, but they are distinctly different implementations. The A100 PCIe 80 GB uses the GA100 chip fabricated on a 7 nm process at TSMC, while the RTX A4500 uses the GA102 chip on an 8 nm process at Samsung. The transistor counts differ substantially: the GA100 packs 54,200 million transistors on a 826 mm² die, yielding a density of 65.6 million transistors per square millimeter. The GA102 contains 28,300 million transistors on a 628 mm² die, with a density of 45.1 million per square millimeter.

Memory architecture is where the two diverge most sharply. The A100 PCIe 80 GB uses 80 GB of HBM2e on a 5120-bit bus, delivering 1.94 TB/s of bandwidth. The RTX A4500 uses 20 GB of GDDR6 on a 320-bit bus, providing 640.0 GB/s. That is a threefold difference in memory bandwidth, which directly impacts compute-heavy workloads that are memory-bound.

The compute unit configurations also differ. The A100 PCIe 80 GB has 6,912 shading units, 432 texture mapping units, 160 ROPs, and 432 tensor cores. The RTX A4500 has 7,168 shading units, 224 TMUs, 96 ROPs, 56 RT cores, and 224 tensor cores. The RTX A4500 has more shading units, but fewer TMUs and ROPs per shading unit, and half the tensor core count. The RTX A4500 includes 56 RT cores, while the A100 PCIe 80 GB does not list RT cores, consistent with its server compute role rather than graphics rendering.

Clock speeds and resulting throughput figures tell a nuanced story. The A100 PCIe 80 GB runs at a base clock of 1065 MHz and a boost of 1410 MHz, with memory at 1512 MHz (3 Gbps effective). The RTX A4500 runs at 1050 MHz base and 1650 MHz boost, with memory at 2000 MHz (16 Gbps effective). Despite the RTX A4500's higher boost clock, the A100 PCIe 80 GB achieves higher pixel rate (225.6 GPixel/s vs 158.4 GPixel/s) and texture rate (609.1 GTexel/s vs 369.6 GTexel/s), due to its wider resource configuration.

In floating-point throughput, the A100 PCIe 80 GB delivers 19.49 TFLOPS FP32 and 77.97 TFLOPS FP16 with a 4:1 ratio. The RTX A4500 delivers 23.65 TFLOPS FP32 and 23.65 TFLOPS FP16 with a 1:1 ratio. The A100 PCIe 80 GB has a massive advantage in FP16 compute, nearly 3.3 times the RTX A4500's FP16 figure, which matters for AI and deep learning workloads. The RTX A4500 has a higher FP32 figure, which benefits traditional graphics and general compute.

The A100 PCIe 80 GB belongs to the Server Ampere generation, while the RTX A4500 belongs to the Workstation Ampere generation. Their production statuses are both end-of-life, but their release dates differ: the A100 PCIe 80 GB was released on June 27, 2021, and the RTX A4500 on November 22, 2021. The A100 PCIe 80 GB's predecessor is Tesla Turing and its successor is Server Ada. The RTX A4500's predecessor is Quadro Turing and its successor is Workstation Ada.

Physical dimensions are nearly identical: both are dual-slot, 267 mm long and 111 or 112 mm tall. The A100 PCIe 80 GB has no display outputs, while the RTX A4500 has four DisplayPort 1.4a outputs.

FAQ

Q: Which card is faster in OpenCL benchmarks?

A: The NVIDIA A100 PCIe 80 GB scores 207,124 in Geekbench OpenCL, which is 46% higher than the RTX A4500's 141,837.

Q: Can the A100 PCIe 80 GB be used for display output?

A: No, the A100 PCIe 80 GB has no display outputs. The RTX A4500 provides 4x DisplayPort 1.4a outputs.

Q: How do their memory configurations compare?

A: The A100 PCIe 80 GB has 80 GB of HBM2e on a 5120-bit bus with 1.94 TB/s bandwidth. The RTX A4500 has 20 GB of GDDR6 on a 320-bit bus with 640.0 GB/s bandwidth.

Q: Which card has higher FP32 compute?

A: The RTX A4500 delivers 23.65 TFLOPS FP32, higher than the A100 PCIe 80 GB's 19.49 TFLOPS.

Q: Which card has higher FP16 compute?

A: The A100 PCIe 80 GB delivers 77.97 TFLOPS FP16 (4:1), far exceeding the RTX A4500's 23.65 TFLOPS FP16 (1:1).

Q: What are the power requirements for each card?

A: The A100 PCIe 80 GB has a TDP of 300 W and suggests a 700 W power supply. The RTX A4500 has a TDP of 200 W and suggests a 550 W power supply.

Specification Differences

| Specification | NVIDIA A100 PCIe 80 GB | NVIDIA RTX A4500 |

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

| Chip | GA100 | GA102 |

| Generation | Server Ampere (Axx) | Workstation Ampere (Ax000) |

| Process node | 7 nm (TSMC) | 8 nm (Samsung) |

| Transistors | 54,200 million | 28,300 million |

| Die size | 826 mm² | 628 mm² |

| Transistor density | 65.6M / mm² | 45.1M / mm² |

| Base clock | 1065 MHz | 1050 MHz |

| Boost clock | 1410 MHz | 1650 MHz |

| Memory clock | 1512 MHz (3 Gbps effective) | 2000 MHz (16 Gbps effective) |

| Memory size | 80 GB HBM2e | 20 GB GDDR6 |

| Memory bus width | 5120 bit | 320 bit |

| Memory bandwidth | 1.94 TB/s | 640.0 GB/s |

| Shading units | 6912 | 7168 |

| TMUs | 432 | 224 |

| ROPs | 160 | 96 |

| RT cores | Not listed | 56 |

| Tensor cores | 432 | 224 |

| Pixel rate | 225.6 GPixel/s | 158.4 GPixel/s |

| Texture rate | 609.1 GTexel/s | 369.6 GTexel/s |

| FP32 | 19.49 TFLOPS | 23.65 TFLOPS |

| FP16 | 77.97 TFLOPS (4:1) | 23.65 TFLOPS (1:1) |

| TDP | 300 W | 200 W |

| Power connectors | 8-pin EPS | 1x 8-pin |

| Suggested PSU | 700 W | 550 W |

| Display outputs | No outputs | 4x DisplayPort 1.4a |

| DirectX support | Not listed | 12 Ultimate (12_2) |

| OpenGL support | Not listed | 4.6 |

| Vulkan support | Not listed | 1.4 |

| Length | 267 mm | 267 mm |

| Height | 111 mm | 112 mm |

| Release date | 2021-06-27 | 2021-11-22 |

| Predecessor | Tesla Turing | Quadro Turing |

| Successor | Server Ada | Workstation Ada |

| Production status | End-of-life | End-of-life |

| Percentile vs all GPUs | 99 | 93 |