NVIDIA A100 PCIe 80 GB vs NVIDIA RTX A4500 Mobile Comparison

Head-to-Head Benchmarks

The database contains one directly comparable benchmark result for these two GPUs, and it is a decisive victory for the desktop-class accelerator. In the Geekbench OpenCL test, the NVIDIA A100 PCIe 80 GB scores 207,124 points, while the NVIDIA RTX A4500 Mobile scores 105,307 points. That is a delta of 96.7% in favor of the A100, meaning the server card delivers nearly double the raw compute throughput in this workload.

Context from the nearest rivals reinforces the magnitude of this gap. The A100 sits at the 99th percentile among all GPUs in the database, with an average benchmark score of 207,124. Its closest competitor is the AMD Radeon PRO W7900D, which scores 219,827, putting the A100 5.8% behind that card. Against the NVIDIA RTX 6000D, the A100 is 5.7% ahead, and it beats the NVIDIA Tesla V100S PCIe 32 GB by 6.5%. The only listed rival that clearly outpaces it is the NVIDIA PG506-232, which scores 225,124, an 8% advantage.

The RTX A4500 Mobile, by contrast, sits at the 93rd percentile, with an average benchmark score of 91,134 across its two recorded tests (OpenCL and Vulkan). Its OpenCL result of 105,307 is roughly half of the A100's score, which explains the lopsided head-to-head. The mobile card's nearest rival, the desktop NVIDIA RTX A4500, scores 91,671, a mere 0.6% difference, indicating that the mobile variant essentially matches its desktop namesake in this metric. The AMD Radeon Instinct MI60 scores 92,466, putting it 1.4% ahead of the mobile part, while the NVIDIA Quadro GP100 trails by 4.2% and the AMD Radeon PRO W7600 trails by 4.6%.

The single head-to-head result tells a clear story: the A100 PCIe 80 GB is in a different performance class. However, the RTX A4500 Mobile does have a Vulkan score of 76,960 in the database, a test that was not run on the A100. That result cannot be compared directly, but it shows the mobile GPU has multiple recorded workloads, while the A100 has only the one OpenCL entry.

Where Each One Wins

Based on the recorded data, the A100 PCIe 80 GB wins the only shared benchmark category. In OpenCL, it outperforms the RTX A4500 Mobile by 96.7%, a margin that reflects the fundamental difference between a 300 W server accelerator and a 140 W mobile workstation GPU. The A100's 19.49 TFLOPS of FP32 performance and 77.97 TFLOPS of FP16 performance (at a 4:1 ratio) dwarf the mobile part's 17.66 TFLOPS in both FP32 and FP16 (at a 1:1 ratio). That FP16 advantage is particularly relevant for AI and machine learning workloads, where the A100's tensor cores, 432 of them, can be fully utilized.

The RTX A4500 Mobile does not win any recorded benchmark against the A100, but it does have a distinct strength: feature completeness in graphics APIs. The mobile card supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the A100 lists no API support for DirectX, OpenGL, or Vulkan. The A100 also has no display outputs, whereas the RTX A4500 Mobile has outputs described as "Portable Device Dependent." For tasks involving real-time graphics rendering, ray tracing, or direct display output, the mobile GPU is the only viable option between the two. The RTX A4500 Mobile also includes 46 ray tracing cores, which the A100 lacks entirely (the A100's RT core count is not listed in the database).

For compute-heavy workloads, the A100 is the clear choice. Its 80 GB of HBM2e memory with 1.94 TB/s of bandwidth provides 3.8 times the bandwidth of the mobile card's 512.0 GB/s. The memory bus width of 5120 bits versus 256 bits further underscores the A100's design for massive data movement. The RTX A4500 Mobile, with 16 GB of GDDR6 on a 256-bit bus, is better suited for portable workstations where power and space are constrained, but it cannot match the A100's memory throughput.

Architecture Differences

Both GPUs are built on NVIDIA's Ampere architecture, but they are implemented on different chips and process nodes. The A100 uses the GA100 chip fabricated on TSMC's 7 nm process, while the RTX A4500 Mobile uses the GA104 chip on Samsung's 8 nm process. This node difference contributes to the A100's transistor density of 65.6 million transistors per square millimeter, compared to 44.4 million for the mobile chip. The A100 packs 54,200 million transistors on a 826 mm² die, while the GA104 has 17,400 million transistors on a 392 mm² die.

The compute resource allocation is starkly different. The A100 has 6,912 shading units, 432 texture mapping units, and 160 raster output units. The RTX A4500 Mobile has 5,888 shading units, 184 TMUs, and 96 ROPs. The A100 also has 432 tensor cores, while the mobile GPU has 184 tensor cores. However, the mobile GPU includes 46 ray tracing cores, a feature absent from the A100's specification list.

Clock speeds tell a nuanced story. The A100 has a base clock of 1065 MHz and a boost clock of 1410 MHz. The RTX A4500 Mobile has a lower base clock of 930 MHz but a higher boost clock of 1500 MHz. This means the mobile chip can reach higher instantaneous clock speeds, but the A100's larger silicon and higher power budget allow it to sustain far more throughput.

Memory architecture is a major differentiator. The A100 uses 80 GB of HBM2e with a 5120-bit bus and 1.94 TB/s bandwidth. The RTX A4500 Mobile uses 16 GB of GDDR6 with a 256-bit bus and 512.0 GB/s bandwidth. The memory clock differs as well: the A100's memory runs at 1512 MHz (3 Gbps effective), while the mobile GPU's memory runs at 2000 MHz (16 Gbps effective). The higher effective data rate on the mobile card's GDDR6 does not compensate for the vastly wider HBM2e interface on the A100.

Power and physical design also separate the two. The A100 is a dual-slot card with a 300 W TDP, an 8-pin EPS power connector, and a suggested PSU of 700 W. It measures 267 mm in length and 111 mm in height. The RTX A4500 Mobile has a 140 W TDP, no power connectors listed (as it draws power through the mobile platform), and no physical dimensions recorded in the database. The A100 is PCIe 4.0 x16, and so is the mobile GPU, but the A100 has no display outputs while the mobile part's outputs are portable-device dependent.

Production timelines differ as well. The A100 was released on June 27, 2021, while the RTX A4500 Mobile arrived on March 21, 2022. Both are marked as end-of-life. The A100's predecessor is listed as Tesla Turing, with Server Ada as its successor. The RTX A4500 Mobile's predecessor is Quadro Turing-M, with Ada-MW as its successor.

FAQ

Q: Which GPU has the higher raw compute performance in the recorded benchmarks?

A: The NVIDIA A100 PCIe 80 GB scores 207,124 in Geekbench OpenCL, which is 96.7% higher than the RTX A4500 Mobile's 105,307. The A100 also has higher FP32 throughput at 19.49 TFLOPS versus 17.66 TFLOPS.

Q: Does the RTX A4500 Mobile support any features the A100 does not?

A: Yes. The RTX A4500 Mobile includes 46 ray tracing cores, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and has display outputs. The A100 has no listed RT cores, no API support, and no display outputs.

Q: How do the memory subsystems compare?

A: The A100 has 80 GB of HBM2e with a 5120-bit bus and 1.94 TB/s bandwidth. The RTX A4500 Mobile has 16 GB of GDDR6 with a 256-bit bus and 512.0 GB/s bandwidth. The A100 provides roughly 3.8 times the memory bandwidth.

Q: What are the power requirements for each GPU?

A: The A100 has a 300 W TDP and requires a 700 W suggested PSU with an 8-pin EPS connector. The RTX A4500 Mobile has a 140 W TDP and lists no power connectors, as it relies on the mobile platform for power delivery.

Q: How does the RTX A4500 Mobile compare to its closest rivals in the database?

A: The RTX A4500 Mobile's average benchmark score is 91,134. Its nearest rival, the desktop NVIDIA RTX A4500, scores 91,671, a 0.6% difference. The AMD Radeon Instinct MI60 is 1.4% ahead, while the NVIDIA Quadro GP100 and AMD Radeon PRO W7600 trail by 4.2% and 4.6%, respectively.

Q: Are both GPUs still in production?

A: No. Both are listed as end-of-life. The A100 was released on June 27, 2021, and the RTX A4500 Mobile was released on March 21, 2022.

Specification Differences

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

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

| Chip | GA100 | GA104 |

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

| Transistors | 54,200 million | 17,400 million |

| Die size | 826 mm² | 392 mm² |

| Transistor density | 65.6M / mm² | 44.4M / mm² |

| Base clock | 1065 MHz | 930 MHz |

| Boost clock | 1410 MHz | 1500 MHz |

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

| Memory size | 80 GB | 16 GB |

| Memory type | HBM2e | GDDR6 |

| Memory bus width | 5120 bit | 256 bit |

| Memory bandwidth | 1.94 TB/s | 512.0 GB/s |

| Shading units | 6912 | 5888 |

| TMUs | 432 | 184 |

| ROPs | 160 | 96 |

| RT cores | None listed | 46 |

| Tensor cores | 432 | 184 |

| Pixel rate | 225.6 GPixel/s | 144.0 GPixel/s |

| Texture rate | 609.1 GTexel/s | 276.0 GTexel/s |

| FP32 performance | 19.49 TFLOPS | 17.66 TFLOPS |

| FP16 performance | 77.97 TFLOPS (4:1) | 17.66 TFLOPS (1:1) |

| TDP | 300 W | 140 W |

| Slot width | Dual-slot | Not listed |

| Power connectors | 8-pin EPS | None |

| Suggested PSU | 700 W | Not listed |

| Display outputs | No outputs | Portable Device Dependent |

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

| OpenGL support | Not listed | 4.6 |

| Vulkan support | Not listed | 1.4 |

| Dimensions | 267 mm x 111 mm | Not listed |

| Release date | June 27, 2021 | March 21, 2022 |

| Predecessor | Tesla Turing | Quadro Turing-M |

| Successor | Server Ada | Ada-MW |