NVIDIA RTX PRO 6000 Blackwell vs NVIDIA T400 4 GB Comparison

The NVIDIA T400 4 GB and the NVIDIA RTX PRO 6000 Blackwell represent two extreme ends of the professional graphics spectrum. The data shows a Turing-era entry-level card facing off against a Blackwell-generation flagship, and the benchmark results, while limited, highlight a stark contrast in performance and positioning. The T400 relies on two OpenCL and Vulkan scores, while the RTX PRO 6000 has a single DirectX 12 result, making direct comparisons challenging but still revealing.

Head-to-Head Benchmarks

The available benchmark data does not provide a direct apples-to-apples comparison between these two cards. The NVIDIA T400 4 GB has results for Geekbench OpenCL and Geekbench Vulkan, scoring 17,320 and 16,263 respectively. Its average benchmark score is 16,792. The NVIDIA RTX PRO 6000 Blackwell, on the other hand, has a single result for 3DMark Steel Nomad DX12, scoring 16,408. This means there is no shared test in the FACT PACK to directly compare their raw compute power under the same workload.

However, the data does allow for a relative analysis through their nearest rivals. The T400's average score of 16,792 places it 0.6% ahead of the AMD Radeon RX 7600S (16,696) and 0.8% behind the NVIDIA Tesla M4 (16,932). This indicates that within its performance tier, the T400 is a solid mid-pack performer. Conversely, the RTX PRO 6000's score of 16,408 is essentially tied with the AMD Radeon PRO W7500 (16,415), showing a 0% delta, and sits 0.3% ahead of the AMD Radeon RX 5700 XT (16,361). The RTX PRO 6000 also trails the NVIDIA GeForce RTX 5090 D V2 by 0.6%, which scored 16,504.

The most significant takeaway from the head-to-head data is not a direct win for either card, but rather the context of their scores. The T400, a 30 W card with 384 shading units, achieves an average score of 16,792. The RTX PRO 6000, a 600 W card with 24,064 shading units, achieves 16,408. Despite having roughly 63 times more shading units and 20 times the thermal budget, the RTX PRO 6000's single benchmark score is actually 2.3% lower than the T400's average. This is a clear indicator that the two benchmarks are measuring vastly different workloads; the Geekbench tests likely favor the T400's driver optimizations or specific compute tasks, while the 3DMark Steel Nomad test is a modern, heavy DirectX 12 workload that the T400 would struggle to even run. The data shows that the T400 wins in the available OpenCL/Vulkan metrics, while the RTX PRO 6000's win is implied by its architectural capabilities, which are detailed in the next section.

Architecture Differences

The architectural gap between these two GPUs is immense, as the data shows fundamental differences in every core component. The T400 is built on the Turing architecture, using the TU117 chip, and is fabricated on a 12 nm process at TSMC. It contains 4,700 million transistors on a 200 mm² die, resulting in a transistor density of 23.5M per mm². In contrast, the RTX PRO 6000 uses the Blackwell 2.0 architecture with the GB202 chip, fabricated on a 5 nm process, also at TSMC. This newer node allows for 92,200 million transistors on a 750 mm² die, achieving a much higher density of 122.9M per mm².

Memory configurations are equally divergent. The T400 has 4 GB of GDDR6 memory on a 64-bit bus, providing 80.00 GB/s of bandwidth. The RTX PRO 6000 features 96 GB of GDDR7 memory on a 512-bit bus, delivering 1.79 TB/s of bandwidth. This represents a 23.4x increase in raw memory bandwidth and a 24x increase in capacity. The clock speeds also differ significantly, with the T400's base clock at 420 MHz and boost at 1425 MHz, while the RTX PRO 6000 has a much higher base clock of 1590 MHz and a boost of 2617 MHz.

The compute resources are where the disparity becomes most pronounced. The T400 has 384 shading units, 24 TMUs, and 16 ROPs, with no dedicated RT or Tensor cores listed. The RTX PRO 6000 has 24,064 shading units, 752 TMUs, and 192 ROPs, along with 188 RT cores and 752 Tensor cores. This translates to a massive difference in raw throughput: the T400 offers 1,094.4 GFLOPS of FP32 performance and 2.189 TFLOPS of FP16 (2:1 ratio), while the RTX PRO 6000 delivers 126.0 TFLOPS for both FP32 and FP16 (1:1 ratio). The T400's pixel rate is 22.80 GPixel/s and texture rate is 34.20 GTexel/s, compared to the RTX PRO 6000's 502.5 GPixel/s and 1,968.0 GTexel/s.

Furthermore, the RTX PRO 6000 supports DirectX 12 Ultimate (12_2), while the T400 only supports DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4. The bus interface also differs, with the T400 using PCIe 3.0 x16 and the RTX PRO 6000 using PCIe 5.0 x16. The RTX PRO 6000 also includes dedicated RT and Tensor cores, which are absent from the T400, indicating a clear feature split in hardware-accelerated ray tracing and AI workloads.

The Verdict

From the data, the NVIDIA RTX PRO 6000 Blackwell is the superior workstation card for modern, demanding professional workloads. Its architectural advantages are overwhelming: a newer 5 nm process, 96 GB of GDDR7 memory with 1.79 TB/s bandwidth, and 126.0 TFLOPS of compute power. The presence of 188 RT cores and 752 Tensor cores makes it capable of hardware-accelerated ray tracing and AI inference, which the T400 cannot do at a hardware level. The RTX PRO 6000 is an active product, released in 2025, and has a launch MSRP of 8,565 USD. It is the clear choice for professionals working with large datasets, complex simulations, or AI models.

The NVIDIA T400 4 GB, by contrast, is an end-of-life product from 2021. Its 4 GB of memory and 80.00 GB/s bandwidth are severely limited, and its 1,094.4 GFLOPS FP32 performance is minuscule compared to the RTX PRO 6000. However, its 30 W TDP and single-slot design suggest it was designed for basic display output or low-power compute tasks. The benchmark data shows it holds its own in Geekbench tests, scoring an average of 16,792, which is competitive with its rivals like the AMD Radeon RX 7600S. The verdict is clear: the RTX PRO 6000 is for heavy, modern compute; the T400 is for legacy or auxiliary tasks where power draw and physical size are the primary constraints. The data does not support the T400 as a viable alternative for any workload the RTX PRO 6000 can handle.

FAQ

Q: Which card has a higher average benchmark score?

A: The NVIDIA T400 4 GB has a higher average benchmark score of 16,792, compared to the NVIDIA RTX PRO 6000 Blackwell's score of 16,408 from a single 3DMark test.

Q: What is the memory bandwidth difference?

A: The RTX PRO 6000 offers 1.79 TB/s of bandwidth, which is significantly higher than the T400's 80.00 GB/s, representing a 23.4x increase.

Q: Does the T400 support hardware ray tracing?

A: No, the FACT PACK lists no RT cores for the T400, while the RTX PRO 6000 has 188 RT cores.

Q: What is the process node for each GPU?

A: The T400 is fabricated on a 12 nm process, while the RTX PRO 6000 uses a 5 nm process, both at TSMC.

Q: Which card has a higher boost clock?

A: The RTX PRO 6000 has a boost clock of 2617 MHz, compared to the T400's 1425 MHz.

Q: What is the production status of each card?

A: The T400 is marked as end-of-life, while the RTX PRO 6000 is listed as active.

Where Each One Wins

The NVIDIA T400 4 GB wins in the specific benchmarks where it has data. Its Geekbench OpenCL score of 17,320 and Vulkan score of 16,263 contribute to an average of 16,792, which is higher than the RTX PRO 6000's single score. The T400 also wins on power efficiency, with a 30 W TDP and no power connectors required, making it suitable for systems with a 200 W suggested PSU. Its single-slot design and lack of a power connector indicate it is meant for low-profile or auxiliary installations where the RTX PRO 6000's dual-slot, 600 W requirement would be impossible.

The NVIDIA RTX PRO 6000 Blackwell wins in every architectural category that matters for modern performance. It has a higher base clock (1590 MHz vs 420 MHz), a higher boost clock (2617 MHz vs 1425 MHz), and vastly more shading units (24,064 vs 384). Its memory subsystem is superior, with 96 GB of GDDR7 on a 512-bit bus versus 4 GB of GDDR6 on a 64-bit bus. The RTX PRO 6000 also wins on features, supporting DirectX 12 Ultimate and including 188 RT cores and 752 Tensor cores, which the T400 lacks entirely. Its pixel rate of 502.5 GPixel/s is over 22 times higher than the T400's 22.80 GPixel/s, and its texture rate of 1,968.0 GTexel/s dwarfs the T400's 34.20 GTexel/s. The RTX PRO 6000 is also a current product with PCIe 5.0 support, while the T400 is end-of-life with PCIe 3.0.

Specification Differences

The specification table below highlights only the fields where the two GPUs differ, based on the FACT PACK.

| Specification | NVIDIA T400 4 GB | NVIDIA RTX PRO 6000 Blackwell |

| :--- | :--- | :--- |

| Chip | TU117 | GB202 |

| Architecture | Turing | Blackwell 2.0 |

| Generation | Quadro Turing (Tx000) | Blackwell PRO W (x000) |

| Process Node | 12 nm | 5 nm |

| Transistors | 4,700 million | 92,200 million |

| Die Size | 200 mm² | 750 mm² |

| Transistor Density | 23.5M / mm² | 122.9M / mm² |

| Base Clock | 420 MHz | 1590 MHz |

| Boost Clock | 1425 MHz | 2617 MHz |

| Memory Clock | 1250 MHz (10 Gbps effective) | 1750 MHz (28 Gbps effective) |

| Memory Size | 4 GB | 96 GB |

| Memory Type | GDDR6 | GDDR7 |

| Memory Bus Width | 64 bit | 512 bit |

| Memory Bandwidth | 80.00 GB/s | 1.79 TB/s |

| Shading Units | 384 | 24064 |

| TMUs | 24 | 752 |

| ROPs | 16 | 192 |

| RT Cores | None | 188 |

| Tensor Cores | None | 752 |

| Pixel Rate | 22.80 GPixel/s | 502.5 GPixel/s |

| Texture Rate | 34.20 GTexel/s | 1,968.0 GTexel/s |

| FP32 Performance | 1,094.4 GFLOPS | 126.0 TFLOPS |

| FP16 Performance | 2.189 TFLOPS (2:1) | 126.0 TFLOPS (1:1) |

| TDP | 30 W | 600 W |

| Slot Width | Single-slot | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | 200 W | 1000 W |

| Bus Interface | PCIe 3.0 x16 | PCIe 5.0 x16 |

| Display Outputs | 3x mini-DisplayPort 1.4a | 4x DisplayPort 2.1b |

| DirectX Support | 12 (12_1) | 12 Ultimate (12_2) |

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

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

| Release Date | 2021-05-05 | 2025-03-17 |

| Predecessor | Quadro Volta | Workstation Ada |

| Successor | Workstation Ampere | None |

| Launch MSRP | None | 8,565 USD |