NVIDIA CMP 40HX vs NVIDIA GeForce RTX 4090 D Comparison

Where Each One Wins

The recorded data splits these two NVIDIA parts cleanly along workload boundaries, though the split is lopsided. The RTX 4090 D wins both benchmark comparisons in the database, taking the Geekbench OpenCL and Vulkan tests outright. That gives it a 2-0 record against the CMP 40HX. The CMP 40HX, meanwhile, registers zero wins in direct comparisons, which makes its case rest entirely on what it does not need to do rather than what it does well.

The RTX 4090 D is clearly aimed at compute-heavy tasks where raw throughput and memory bandwidth matter. Its OpenCL score of 278,621 versus the CMP 40HX's 93,395 represents a 198.3% advantage, a gap that suggests the 4090 D is in a different performance tier altogether. The Vulkan result tells the same story: 246,941 against 77,879, a 217.1% lead. For any application that leverages general-purpose GPU compute, the 4090 D is the only rational choice based on these measurements.

The CMP 40HX, by contrast, was built for a narrower purpose: mining. Its lack of display outputs, its PCIe 1.0 x4 interface, and its lower power draw all point to a card designed to sit in a mining rig and process hashes, not to render frames or accelerate scientific workloads. The benchmark data does not capture mining performance directly, but the architectural choices suggest that the CMP 40HX trades away general-purpose capability for efficiency in a specific, narrowly defined task. In the database's recorded tests, it simply cannot compete, but its 93rd percentile ranking among all GPUs indicates it is still a capable card for what it does.

Architecture Differences

The two cards come from different generations and different design philosophies. The RTX 4090 D uses the AD102 chip built on Ada Lovelace architecture, fabricated on a 5 nm process at TSMC. It packs 76,300 million transistors into a 609 mm² die, yielding a transistor density of 125.3 million per square millimeter. The CMP 40HX uses the older TU106 chip on Turing architecture, also from TSMC but on a 12 nm process. It contains 10,800 million transistors on a 445 mm² die, for a density of just 24.3 million per square millimeter. The process node difference alone explains a large part of the performance gap: the 4090 D crams more than seven times the transistors into a die that is only about 37% larger.

Memory configurations diverge sharply. The RTX 4090 D carries 24 GB of GDDR6X on a 384-bit bus, delivering 1.01 TB/s of bandwidth. The CMP 40HX has 8 GB of GDDR6 on a 256-bit bus, for 448.0 GB/s. That is a 2.25x bandwidth advantage for the 4090 D, which matters enormously for memory-bound workloads. The 4090 D also runs its memory at 21 Gbps effective, versus 14 Gbps for the CMP 40HX, so both the bus width and the per-pin speed favor the newer card.

Compute resources show the same pattern. The RTX 4090 D has 14,592 shading units, 456 TMUs, 176 ROPs, 114 RT cores, and 456 tensor cores. The CMP 40HX has 2,304 shading units, 144 TMUs, 64 ROPs, 36 RT cores, and 288 tensor cores. The 4090 D leads in every category except tensor core count, where it matches the CMP 40HX at 456 versus 288, though its tensor cores are from a newer generation. The FP32 throughput tells the story: 73.54 TFLOPS for the 4090 D versus 7.603 TFLOPS for the CMP 40HX, a 9.7x difference. FP16 is interesting: the 4090 D runs it at 73.54 TFLOPS (1:1 ratio), while the CMP 40HX reaches 15.21 TFLOPS (2:1 ratio), meaning the older card processes FP16 at double its FP32 rate, a nod toward specific compute workloads.

Power and physical design also differ. The 4090 D draws 425 W with a suggested 800 W PSU, uses a triple-slot cooler, and requires a 16-pin connector. The CMP 40HX draws 185 W with a 450 W PSU suggestion, fits in a dual-slot design, and uses a single 8-pin connector. The CMP 40HX's PCIe 1.0 x4 interface is a stark contrast to the 4090 D's PCIe 4.0 x16, and the mining card has no display outputs at all, confirming its dedicated purpose.

Head-to-Head Benchmarks

The two recorded benchmarks are both Geekbench tests, and both show overwhelming wins for the RTX 4090 D. In OpenCL, the scores are 278,621 versus 93,395, a delta of 198.3%. This is not a marginal victory; it is a near-tripling of the score. The Vulkan test shows 246,941 versus 77,879, a 217.1% delta, meaning the 4090 D more than triples the CMP 40HX's Vulkan performance. Both tests are compute-oriented, so they align with the 4090 D's architectural strengths: more shaders, more memory bandwidth, and a newer process node.

The magnitude of these deltas deserves emphasis. A 198% lead in OpenCL means the 4090 D finishes a given workload in roughly one-third the time, assuming linear scaling. The 217% Vulkan lead is even larger, suggesting that the 4090 D's newer architecture extracts more efficiency from the Vulkan API. The CMP 40HX's Turing architecture, while supporting Vulkan 1.4 and DirectX 12 Ultimate, does not have the raw resources to keep pace.

Context from the nearest rivals helps position these scores. The RTX 4090 D's average benchmark score is 178,050, placing it at the 98th percentile among all GPUs. Its nearest rivals are the RTX PRO 5000 Blackwell at -2.2%, the A100 SXM4 80 GB at -3.1%, the RTX 5000 Ada Generation at -3.6%, and the A100 SXM4 40 GB at -4.9%. This means the 4090 D sits within 5% of several professional-grade compute cards, a remarkable position for a consumer-oriented part. The CMP 40HX, with an average score of 85,637, sits at the 93rd percentile, with rivals like the Radeon PRO W7600 at -1.7%, the Quadro GP100 at -2.1%, and the Radeon PRO W6600 at +4.4%. The CMP 40HX is competitive within its own tier, but that tier is far below the 4090 D's.

The Verdict

The data points to a simple conclusion: the RTX 4090 D is the superior card for any general-purpose compute task, and the CMP 40HX is a specialized tool for a job the benchmarks do not measure. If the workload is OpenCL or Vulkan compute, the 4090 D wins by nearly 200% or more. Its 98th percentile ranking among all GPUs, its 24 GB memory pool, and its 1.01 TB/s bandwidth make it a heavyweight for rendering, machine learning, and scientific simulation.

The CMP 40HX, however, should not be dismissed outright. Its 93rd percentile ranking shows it outperforms the majority of GPUs in the database, and its 185 W power draw makes it far easier to deploy in multi-card configurations. A mining rig with several CMP 40HX cards could draw less power than a single RTX 4090 D while providing distributed hashing throughput. The lack of display outputs and the PCIe 1.0 x4 interface are non-issues for mining, but they disqualify it for desktop use.

Who should pick which? A researcher, developer, or content creator needing maximum compute performance should choose the RTX 4090 D without hesitation. Its benchmark scores and architectural resources leave no room for doubt. A miner building a dedicated rig, on the other hand, might prefer the CMP 40HX for its efficiency profile, though the database does not contain mining-specific benchmarks to confirm this. The recorded data only shows one card dominating the other in every measured test, so any recommendation must start from that fact.

FAQ

Q: Which card has a higher average benchmark score?

A: The RTX 4090 D has an average benchmark score of 178,050, while the CMP 40HX scores 85,637, a difference of roughly 108%.

Q: How does the RTX 4090 D compare to its nearest rivals?

A: It sits within 5% of the RTX PRO 5000 Blackwell (-2.2%), the A100 SXM4 80 GB (-3.1%), the RTX 5000 Ada Generation (-3.6%), and the A100 SXM4 40 GB (-4.9%).

Q: Does the CMP 40HX support display outputs?

A: No, the CMP 40HX has no display outputs, which makes it unsuitable for standard desktop use but acceptable for mining.

Q: What is the memory bandwidth difference?

A: The RTX 4090 D delivers 1.01 TB/s, while the CMP 40HX provides 448.0 GB/s, giving the newer card a 2.25x advantage.

Q: Which card has a higher transistor density?

A: The RTX 4090 D has 125.3 million transistors per square millimeter, versus 24.3 million for the CMP 40HX, reflecting the 5 nm versus 12 nm process gap.

Q: Are both cards still in production?

A: No, both are marked as end-of-life in the database, with the RTX 4090 D released in December 2023 and the CMP 40HX in February 2021.

Specification Differences

| Specification | NVIDIA GeForce RTX 4090 D | NVIDIA CMP 40HX |

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

| Architecture | Ada Lovelace | Turing |

| Process node | 5 nm | 12 nm |

| Transistors | 76,300 million | 10,800 million |

| Die size | 609 mm² | 445 mm² |

| Transistor density | 125.3M / mm² | 24.3M / mm² |

| Base clock | 2280 MHz | 1470 MHz |

| Boost clock | 2520 MHz | 1650 MHz |

| Memory clock | 21 Gbps effective | 14 Gbps effective |

| Memory size | 24 GB | 8 GB |

| Memory type | GDDR6X | GDDR6 |

| Memory bus width | 384 bit | 256 bit |

| Memory bandwidth | 1.01 TB/s | 448.0 GB/s |

| Shading units | 14592 | 2304 |

| TMUs | 456 | 144 |

| ROPs | 176 | 64 |

| RT cores | 114 | 36 |

| Tensor cores | 456 | 288 |

| Pixel rate | 443.5 GPixel/s | 105.6 GPixel/s |

| Texture rate | 1,149.1 GTexel/s | 237.6 GTexel/s |

| FP32 | 73.54 TFLOPS | 7.603 TFLOPS |

| FP16 | 73.54 TFLOPS (1:1) | 15.21 TFLOPS (2:1) |

| TDP | 425 W | 185 W |

| Slot width | Triple-slot | Dual-slot |

| Power connectors | 1x 16-pin | 1x 8-pin |

| Suggested PSU | 800 W | 450 W |

| Bus interface | PCIe 4.0 x16 | PCIe 1.0 x4 |

| Display outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a | No outputs |

| Dimensions (LxHxW) | 304 x 137 x 61 mm | 229 x 111 x 35 mm |

| Release date | 2023-12-27 | 2021-02-24 |

| Launch MSRP | 1,599 USD | 699 USD |