NVIDIA GeForce GTX TITAN Z vs NVIDIA RTX A4000 Comparison

FAQ

Q: Which GPU is faster in the recorded benchmarks?

A: The NVIDIA RTX A4000 wins every head-to-head benchmark in the database. It leads by 315.2% in Geekbench OpenCL and by 480% in Geekbench Vulkan.

Q: How much memory does each card have?

A: The RTX A4000 has 16 GB of GDDR6 memory on a 256-bit bus with 448.0 GB/s bandwidth. The GTX TITAN Z has 6 GB of GDDR5 memory on a 384-bit bus with 336.0 GB/s bandwidth.

Q: What are the power requirements?

A: The RTX A4000 has a TDP of 140 W with a single 6-pin connector and a suggested PSU of 300 W. The GTX TITAN Z has a TDP of 375 W, requires two 8-pin connectors, and a suggested PSU of 750 W.

Q: Do these cards support modern APIs?

A: The RTX A4000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GTX TITAN Z supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.175.

Q: Which card is newer?

A: The RTX A4000 was released on 2021-04-11, while the GTX TITAN Z was released on 2014-05-27. Both are end-of-life products.

Q: What is the average benchmark score for each?

A: The RTX A4000 has an average benchmark score of 26683, placing it in the 72nd percentile of all GPUs. The GTX TITAN Z has an average score of 23736, placing it in the 69th percentile.

Architecture Differences

The RTX A4000 is built on the Ampere architecture using the GA104 chip, manufactured on an 8 nm process by Samsung. It packs 17,400 million transistors into a 392 mm² die, achieving a transistor density of 44.4M per mm². The GTX TITAN Z uses the older Kepler architecture with the GK110B chip, built on a 28 nm process by TSMC. It contains 7,080 million transistors across a much larger 561 mm² die, with a lower density of 12.6M per mm².

The RTX A4000 features 6,144 shading units, 192 texture mapping units, and 96 raster operation units. It also includes 48 dedicated ray tracing cores and 192 tensor cores, enabling hardware-accelerated ray tracing and AI workloads. The GTX TITAN Z has 2,880 shading units, 240 texture mapping units, and 48 raster operation units, with no ray tracing or tensor cores. This makes the RTX A4000 fundamentally more capable in modern graphics workloads.

Clock speeds tell a similar story. The RTX A4000 runs at a base clock of 735 MHz and boosts to 1560 MHz, while the GTX TITAN Z operates at 705 MHz base and 876 MHz boost. The RTX A4000 also delivers far higher compute throughput: 19.17 TFLOPS FP32 versus 5.046 TFLOPS, and it offers FP16 at a 1:1 ratio, which the GTX TITAN Z cannot match. Pixel and texture rates follow, with the RTX A4000 hitting 149.8 GPixel/s and 299.5 GTexel/s, compared to 52.56 GPixel/s and 210.2 GTexel/s for the GTX TITAN Z.

Memory architecture also differs sharply. The RTX A4000 uses GDDR6 at 14 Gbps effective, while the GTX TITAN Z uses GDDR5 at 7 Gbps effective. The interface width is 256-bit on the RTX A4000 versus 384-bit on the GTX TITAN Z, but the newer memory technology gives the RTX A4000 the bandwidth advantage. Connectivity standards also move forward: the RTX A4000 uses PCIe 4.0 x16, while the GTX TITAN Z uses PCIe 3.0 x16.

The physical cards differ substantially. The RTX A4000 is a single-slot design, 241 mm long, 112 mm tall, with four DisplayPort 1.4a outputs. The GTX TITAN Z is a triple-slot card, 267 mm long, 111 mm tall, and 62 mm wide, with dual DVI, one HDMI 1.4a, and one DisplayPort 1.2 output. The RTX A4000 is far easier to fit and cool, while the GTX TITAN Z demands significant chassis space and airflow.

Head-to-Head Benchmarks

The database records two direct comparisons between these cards, and the RTX A4000 dominates both. In Geekbench OpenCL, the RTX A4000 scores 105739 against 25465 for the GTX TITAN Z, a delta of 315.2%. This is not a marginal improvement; it is a generational leap. The OpenCL result reflects raw compute throughput, where the RTX A4000's 19.17 TFLOPS FP32 and 16 GB GDDR6 memory give it a massive advantage over the GTX TITAN Z's 5.046 TFLOPS and 6 GB GDDR5.

In Geekbench Vulkan, the gap widens further. The RTX A4000 scores 127645, while the GTX TITAN Z manages only 22006, a delta of 480%. Vulkan performance benefits heavily from modern architecture features, including async compute and better driver optimization. The RTX A4000's support for Vulkan 1.4, compared to the GTX TITAN Z's Vulkan 1.2.175, also plays a role. The GTX TITAN Z simply lacks the hardware capabilities to compete in modern API workloads.

These results align with the broader benchmark picture. The RTX A4000 posts an average score of 26683, sitting 0.5% ahead of the AMD Radeon RX 5700 XT 50th Anniversary, 1% ahead of the NVIDIA GeForce MX550, and 1.1% ahead of the AMD Radeon 860M. The GTX TITAN Z averages 23736, which is 0.5% behind the NVIDIA GeForce RTX 3080 Mobile, 0.6% behind the AMD Radeon RX 9070, and 0.9% ahead of the NVIDIA GeForce RTX 3070 Ti Mobile. The RTX A4000 is competitive with modern midrange GPUs, while the GTX TITAN Z lags behind even mobile parts from recent generations.

Specification Differences

| Specification | NVIDIA RTX A4000 | NVIDIA GeForce GTX TITAN Z |

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

| Architecture | Ampere | Kepler |

| Process Node | 8 nm | 28 nm |

| Transistors | 17,400 million | 7,080 million |

| Die Size | 392 mm² | 561 mm² |

| Transistor Density | 44.4M / mm² | 12.6M / mm² |

| Base Clock | 735 MHz | 705 MHz |

| Boost Clock | 1560 MHz | 876 MHz |

| Memory Size | 16 GB | 6 GB |

| Memory Type | GDDR6 | GDDR5 |

| Memory Bus | 256 bit | 384 bit |

| Memory Bandwidth | 448.0 GB/s | 336.0 GB/s |

| Shading Units | 6144 | 2880 |

| TMUs | 192 | 240 |

| ROPs | 96 | 48 |

| RT Cores | 48 | None |

| Tensor Cores | 192 | None |

| FP32 | 19.17 TFLOPS | 5.046 TFLOPS |

| FP16 | 19.17 TFLOPS (1:1) | None |

| Pixel Rate | 149.8 GPixel/s | 52.56 GPixel/s |

| Texture Rate | 299.5 GTexel/s | 210.2 GTexel/s |

| TDP | 140 W | 375 W |

| Slot Width | Single-slot | Triple-slot |

| Power Connectors | 1x 6-pin | 2x 8-pin |

| Suggested PSU | 300 W | 750 W |

| Bus Interface | PCIe 4.0 x16 | PCIe 3.0 x16 |

| Display Outputs | 4x DisplayPort 1.4a | 2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2 |

| DirectX | 12 Ultimate (12_2) | 12 (11_1) |

| Vulkan | 1.4 | 1.2.175 |

| Dimensions | 241 mm x 112 mm | 267 mm x 111 mm x 62 mm |

Where Each One Wins

The RTX A4000 wins every recorded benchmark, so its strengths are clear. It excels in compute-heavy workloads, as shown by the 315.2% OpenCL lead, and in modern graphics APIs, as shown by the 480% Vulkan lead. The 16 GB memory buffer, 448.0 GB/s bandwidth, and 19.17 TFLOPS FP32 make it suitable for large datasets, machine learning inference, and content creation. The single-slot design and 140 W TDP also make it practical for dense workstation builds where space and power are constrained. The 48 RT cores and 192 tensor cores add capabilities that the GTX TITAN Z cannot touch, such as hardware ray tracing and DLSS-style acceleration.

The GTX TITAN Z has no benchmark wins in this comparison. Its only advantages are structural: a wider 384-bit memory bus and more TMUs (240 versus 192). These do not translate into performance gains in the recorded tests. The card's triple-slot footprint, 375 W TDP, and 750 W suggested PSU make it a challenging fit for modern systems. Its 6 GB GDDR5 memory is insufficient for current workloads, and its lack of RT and tensor cores means it cannot accelerate the same feature set as the RTX A4000.

The Verdict

The data makes this a one-sided comparison. The RTX A4000 is faster in every recorded benchmark, with margins of 315.2% in OpenCL and 480% in Vulkan. Its average benchmark score of 26683 places it in the 72nd percentile of all GPUs, while the GTX TITAN Z sits at 23736 in the 69th percentile. The RTX A4000 also delivers 19.17 TFLOPS FP32, 16 GB of GDDR6 memory, and modern API support including DirectX 12 Ultimate and Vulkan 1.4. The GTX TITAN Z offers 5.046 TFLOPS FP32, 6 GB of GDDR5, and older API versions.

Anyone choosing between these two should pick the RTX A4000 unless they have a specific reason to handle a legacy card. The GTX TITAN Z is end-of-life, uses a 28 nm process, and demands 375 W with a triple-slot cooler. The RTX A4000 is also end-of-life but is far more efficient, easier to install, and dramatically faster. The GTX TITAN Z launched at an MSRP of 2,999 USD, which reflects its original flagship positioning, but the benchmark data shows it cannot compete with the RTX A4000 in any measured workload. For modern tasks, the RTX A4000 is the only rational choice.