NVIDIA GeForce GTX TITAN X vs NVIDIA Tesla P4 Comparison

The NVIDIA Tesla P4 and the NVIDIA GeForce GTX TITAN X represent two vastly different philosophies from the same manufacturer: one is a power-efficient, server-oriented accelerator, while the other is a high-performance desktop flagship from a previous generation. Benchmark data shows a clear performance gap, but the architectural story is far more nuanced than raw scores alone. This analysis breaks down the head-to-head results, architectural divergence, and the practical implication of each card's design goals.

Head-to-Head Benchmarks

The benchmark results are unambiguous in their verdict. Across the two shared tests, the GeForce GTX TITAN X wins both, with a decisive margin. In the Geekbench OpenCL test, the TITAN X scores 41,471 against the Tesla P4's 34,947. This translates to a 15.7% deficit for the Tesla P4, a substantial gap that reflects the fundamental difference in their design targets. The Vulkan test paints an even starker picture: the TITAN X posts 49,397 while the Tesla P4 manages 40,309, a delta of 18.4% in favor of the older card.

These results are not surprising when considering the raw hardware. The TITAN X's average benchmark score of 36,530 places it in the 80th percentile of all GPUs, while the Tesla P4's average of 37,628 puts it in the 81st percentile. This is a curious inversion: despite losing both head-to-head tests, the Tesla P4 has a higher average score. This is likely due to the P4's performance in other workloads not captured in the head-to-head, or the TITAN X's scores being dragged down by tests it handles less efficiently. The nearest rivals for each card illustrate their positioning: the Tesla P4 sits within 1.3% of the AMD Radeon PRO W6400 and 0.3% of the AMD Radeon RX Vega 56, while the TITAN X is effectively tied with the AMD Radeon RX 5300M (0% delta) and just 0.7% ahead of the NVIDIA T1000.

The sheer compute throughput explains the TITAN X's victory. Its FP32 performance is rated at 6.691 TFLOPS, a figure the Tesla P4 cannot match at 5.704 TFLOPS. This 17% difference in theoretical peak compute aligns almost exactly with the observed OpenCL benchmark delta. The texture and pixel rates tell a similar story. The TITAN X delivers 209.1 GTexel/s and 104.5 GPixel/s, while the Tesla P4 manages 178.2 GTexel/s and 71.30 GPixel/s. The pixel rate difference is particularly stark, with the TITAN X outperforming the P4 by nearly 47%. For Vulkan workloads, which often stress geometry and memory bandwidth, the TITAN X's 336.6 GB/s of bandwidth versus the P4's 192.3 GB/s is a massive advantage, likely explaining the larger 18.4% gap in that test.

Architecture Differences

The architectural divide between these two GPUs is generational and profound. The Tesla P4 is built on the Pascal architecture, fabricated on a 16 nm process at TSMC. The GeForce GTX TITAN X uses the older Maxwell 2.0 architecture on a 28 nm process. This process shrink is the single most important differentiator. The P4 packs 7,200 million transistors into a 314 mm² die, achieving a transistor density of 22.9 million per square millimeter. The TITAN X, by contrast, houses 8,000 million transistors on a massive 601 mm² die, yielding a density of just 13.3 million per square millimeter. The Pascal chip is denser and more efficient, but the Maxwell chip has more raw resources.

The core configurations reflect this. The TITAN X fields 3,072 shading units, 192 texture mapping units, and 96 raster operation pipelines. The Tesla P4 counters with 2,560 shading units, 160 TMUs, and 64 ROPs. In every category, the TITAN X has 20% to 50% more hardware. This explains its dominance in pixel and texture throughput. The memory subsystems diverge as well. The TITAN X sports 12 GB of GDDR5 on a 384-bit bus, delivering 336.6 GB/s. The Tesla P4 offers 8 GB of GDDR5 on a 256-bit bus, resulting in 192.3 GB/s. The TITAN X's wider bus is a legacy of its desktop flagship status, whereas the P4's narrower bus is a concession to power limits.

Clock speeds and power envelopes highlight the design philosophy gap. The TITAN X runs at a base clock of 1000 MHz with a boost of 1089 MHz, while the Tesla P4 operates at 886 MHz base and 1114 MHz boost. The P4's higher boost clock suggests it can sustain frequency better under load due to its dramatically lower power draw. The TITAN X is rated at 250 W TDP and requires a 600 W power supply, along with a 1x 6-pin and 1x 8-pin power connector. The Tesla P4 sips power at just 75 W TDP, requires no external power connectors, and suggests a 250 W PSU. This is a 70% reduction in power consumption, a figure that speaks to the efficiency gains of the 16 nm process.

Physical dimensions reinforce the contrast. The TITAN X is a dual-slot, 267 mm long card that is 111 mm tall and 38 mm wide. The Tesla P4 is a single-slot, 168 mm long card. The P4 has no display outputs, making it strictly a compute accelerator, while the TITAN X provides 1x DVI, 1x HDMI 2.0, and 3x DisplayPort 1.2 outputs. Both support DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4, but the TITAN X also benchmarks in Metal, a test where it scores 18,723, a result not available for the P4.

The Verdict

The data presents a clear choice based on workload. The GeForce GTX TITAN X is the outright performance winner, taking both head-to-head tests with margins of 15.7% and 18.4%. Its higher FP32 throughput, larger memory bus, and superior pixel fill rate make it the obvious pick for compute tasks that prioritize raw speed. For general-purpose benchmarking, the TITAN X's average score of 36,530 and its 80th percentile ranking show it remains a capable part, even if it is nearly tied with the AMD Radeon RX 5300M. The Tesla P4, despite losing the direct comparison, is not without merit. Its 81st percentile ranking and average score of 37,628, which is actually higher than the TITAN X's, suggest it performs better in a broader range of workloads than the head-to-head tests reveal.

The TITAN X is the card for users who need maximum compute throughput and can accommodate its 250 W TDP and dual-slot footprint. Its 12 GB memory and 384-bit bus are substantial assets for large datasets. The Tesla P4, on the other hand, is for environments where power and space are constrained. Its 75 W TDP, single-slot design, and lack of power connectors make it ideal for dense server deployments. The P4's higher boost clock of 1114 MHz versus the TITAN X's 1089 MHz indicates it can maintain performance in power-limited scenarios. The TITAN X wins on brute force; the P4 wins on efficiency. The launch MSRP of the TITAN X was 999 USD, a figure that reflects its flagship positioning at release.

Specification Differences

The most significant differences between the two cards are as follows:

• Architecture: Tesla P4 uses Pascal; GeForce GTX TITAN X uses Maxwell 2.0.
• Process Node: Tesla P4 is 16 nm; TITAN X is 28 nm (both TSMC).
• Die Size: Tesla P4 is 314 mm²; TITAN X is 601 mm².
• Transistor Count: Tesla P4 has 7,200 million; TITAN X has 8,000 million.
• Transistor Density: Tesla P4 is 22.9M / mm²; TITAN X is 13.3M / mm².
• Base Clock: Tesla P4 is 886 MHz; TITAN X is 1000 MHz.
• Boost Clock: Tesla P4 is 1114 MHz; TITAN X is 1089 MHz.
• Memory Size: Tesla P4 is 8 GB; TITAN X is 12 GB.
• Memory Bus Width: Tesla P4 is 256-bit; TITAN X is 384-bit.
• Memory Bandwidth: Tesla P4 is 192.3 GB/s; TITAN X is 336.6 GB/s.
• Shading Units: Tesla P4 has 2560; TITAN X has 3072.
• TMUs: Tesla P4 has 160; TITAN X has 192.
• ROPs: Tesla P4 has 64; TITAN X has 96.
• Pixel Rate: Tesla P4 is 71.30 GPixel/s; TITAN X is 104.5 GPixel/s.
• Texture Rate: Tesla P4 is 178.2 GTexel/s; TITAN X is 209.1 GTexel/s.
• FP32 Performance: Tesla P4 is 5.704 TFLOPS; TITAN X is 6.691 TFLOPS.
• FP16 Performance: Tesla P4 is 89.12 GFLOPS (1:64); TITAN X has no listed FP16 rating.
• TDP: Tesla P4 is 75 W; TITAN X is 250 W.
• Slot Width: Tesla P4 is single-slot; TITAN X is dual-slot.
• Power Connectors: Tesla P4 has none; TITAN X requires 1x 6-pin + 1x 8-pin.
• Suggested PSU: Tesla P4 is 250 W; TITAN X is 600 W.
• Length: Tesla P4 is 168 mm; TITAN X is 267 mm.
• Display Outputs: Tesla P4 has none; TITAN X has 1x DVI, 1x HDMI 2.0, 3x DisplayPort 1.2.
• Release Date: Tesla P4 is September 2016; TITAN X is March 2015.

FAQ

Q: Which GPU is faster in the Geekbench OpenCL test?

A: The GeForce GTX TITAN X scores 41,471, while the Tesla P4 scores 34,947. The TITAN X wins by 15.7%.

Q: Does the Tesla P4 have a higher average benchmark score than the TITAN X?

A: Yes. The Tesla P4 has an average benchmark score of 37,628, which is higher than the TITAN X's 36,530, despite the TITAN X winning the direct head-to-head tests.

Q: What is the power consumption difference between the two cards?

A: The Tesla P4 has a TDP of 75 W, while the GeForce GTX TITAN X has a TDP of 250 W. The Tesla P4 also requires no power connectors and a 250 W PSU, whereas the TITAN X needs a 1x 6-pin and 1x 8-pin connector and a 600 W PSU.

Q: How does the memory bandwidth compare?

A: The GeForce GTX TITAN X offers 336.6 GB/s over a 384-bit bus, while the Tesla P4 provides 192.3 GB/s over a 256-bit bus. The TITAN X has a 75% bandwidth advantage.

Q: Which card has a higher boost clock?

A: The Tesla P4 has a higher boost clock of 1114 MHz, compared to the GeForce GTX TITAN X's 1089 MHz.

Q: Are both cards capable of running the same modern graphics APIs?

A: Yes. Both support DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. However, the GeForce GTX TITAN X also has a Geekbench Metal score of 18,723, a test not listed for the Tesla P4.