GPU Comparison

The NVIDIA CMP 70HX and the NVIDIA GeForce RTX 4080 Mobile occupy opposite ends of the GPU spectrum, yet their average benchmark scores are surprisingly close. The CMP 70HX, a mining-focused Ampere part, posts an average benchmark score of 38,225, while the RTX 4080 Mobile, an Ada Lovelace laptop part, averages 38,135. This places them within 0.2% of each other, with the CMP 70HX technically ahead. Both sit at the 81st percentile among all GPUs, indicating they deliver comparable overall performance in aggregated metrics, despite radically different architectures and purposes.

Head-to-Head Benchmarks

The head-to-head data reveals a stark divergence in raw compute workloads. In Geekbench OpenCL, the RTX 4080 Mobile scores 159,575, dwarfing the CMP 70HX’s 41,446. This represents a 74% deficit for the CMP 70HX, meaning the RTX 4080 Mobile delivers roughly four times the OpenCL performance. The margin is even larger in Geekbench Vulkan, where the RTX 4080 Mobile scores 145,807 against the CMP 70HX’s 35,003, a 76% gap. These are not incremental differences; they are generational leaps in compute throughput.

The CMP 70HX’s sole advantage in the head-to-head is its average benchmark score of 38,225, which edges out the RTX 4080 Mobile’s 38,135 by 0.2%. This is a statistical near-tie, however, and it does not translate into any per-test victories. The RTX 4080 Mobile wins both head-to-head tests, securing 2 wins to the CMP 70HX’s 0. The CMP 70HX’s higher average is driven by its two available benchmark scores (41,446 and 35,003), which average to 38,225, while the RTX 4080 Mobile’s average is pulled down by its inclusion of Passmark scores, such as 157 in DirectX 10 and 96 in DirectX 12, which are not part of the CMP 70HX’s benchmark suite.

When compared to other rivals, the CMP 70HX sits 0.2% ahead of the RTX 4080 Mobile, 0.3% ahead of the NVIDIA GeForce MX570 A, and 0.3% behind both the RTX 5080 Mobile and AMD Radeon RX 7900 XT. The RTX 4080 Mobile, conversely, trails the CMP 70HX by 0.2%, sits 0.3% ahead of the MX570 A, and is 0.6% behind the RTX 5080 Mobile and RX 7900 XT. These deltas are minuscule, suggesting that in aggregate scoring, all five GPUs are clustered within a 1% performance band.

Where Each One Wins

The RTX 4080 Mobile is the clear winner in compute-intensive applications. Its Geekbench OpenCL score of 159,575 is more than 3.8 times the CMP 70HX’s 41,446, making it the superior choice for general-purpose GPU compute, machine learning inference, and any workload that leverages OpenCL. The Vulkan result of 145,807 versus 35,003 reinforces this, showing a 4.2x advantage in graphics and compute APIs used by modern games and applications. For gaming, content creation, or scientific computing, the RTX 4080 Mobile’s performance is categorically better.

The CMP 70HX has no benchmark wins in the head-to-head data. Its only claim is the 0.2% higher average benchmark score, which is an artifact of having fewer, higher-scoring tests in its suite. In the nearest rival comparison, it also edges out the RTX 4080 Mobile by 0.2%, but this is not a functional advantage in any real workload. The CMP 70HX’s design purpose—mining—does not appear in its benchmark data, and its lack of display outputs means it cannot be used for conventional graphics tasks. Its 8 GB of GDDR6X memory and 608.3 GB/s bandwidth suggest a focus on memory-intensive operations, but the benchmark results do not support a win in any measured category.

Architecture Differences

The two GPUs are built on entirely different architectures and process nodes. The CMP 70HX uses the GA104 chip on Samsung’s 8 nm process, housing 17,400 million transistors in a 392 mm² die. The RTX 4080 Mobile uses the AD104 chip on TSMC’s 5 nm process, packing 35,800 million transistors into a smaller 294 mm² die. This results in a transistor density of 121.8M per mm² for the RTX 4080 Mobile, versus 44.4M per mm² for the CMP 70HX, highlighting the efficiency gains of the newer node.

The RTX 4080 Mobile’s compute resources are substantially larger. It has 7,424 shading units, 232 TMUs, and 80 ROPs, compared to the CMP 70HX’s 3,840 shading units, 120 TMUs, and 64 ROPs. The RTX 4080 Mobile also has 58 RT cores and 232 tensor cores, versus 30 and 120, respectively. This translates to 24.72 TFLOPS FP32 and FP16 performance for the RTX 4080 Mobile, while the CMP 70HX manages 10.71 TFLOPS in both. Pixel rate is 133.2 GPixel/s versus 89.28 GPixel/s, and texture rate is 386.3 GTexel/s versus 167.4 GTexel/s.

Memory configurations differ as well. The CMP 70HX uses 8 GB of GDDR6X on a 256-bit bus, yielding 608.3 GB/s of bandwidth. The RTX 4080 Mobile uses 12 GB of GDDR6 on a 192-bit bus, providing 432.0 GB/s. Despite the lower bandwidth, the RTX 4080 Mobile’s larger memory pool and higher clock speeds (boost 1665 MHz vs 1395 MHz) give it a performance edge. The CMP 70HX has a base clock of 1365 MHz and boost of 1395 MHz, while the RTX 4080 Mobile runs at 1290 MHz base and 1665 MHz boost.

Process node and foundry differences are stark: 8 nm Samsung versus 5 nm TSMC. The RTX 4080 Mobile is rated at 110 W TDP, while the CMP 70HX has no TDP listed. The CMP 70HX is a dual-slot card with a 1x 12-pin power connector and a 200 W suggested PSU, whereas the RTX 4080 Mobile is an IGP with no power connectors and no suggested PSU. The CMP 70HX also uses a PCIe 1.0 x4 interface, which is severely limited, while the RTX 4080 Mobile uses PCIe 4.0 x16.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The NVIDIA CMP 70HX averages 38,225, which is 0.2% higher than the RTX 4080 Mobile’s 38,135.

Q: How large is the performance gap in Geekbench OpenCL?

A: The RTX 4080 Mobile scores 159,575 versus the CMP 70HX’s 41,446, a 74% difference in favor of the RTX 4080 Mobile.

Q: What are the memory capacities and types of each GPU?

A: The CMP 70HX has 8 GB of GDDR6X on a 256-bit bus, while the RTX 4080 Mobile has 12 GB of GDDR6 on a 192-bit bus.

Q: Which GPU has higher FP32 performance?

A: The RTX 4080 Mobile achieves 24.72 TFLOPS FP32, compared to the CMP 70HX’s 10.71 TFLOPS.

Q: Do both GPUs support the same APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the production status of each GPU?

A: The CMP 70HX is end-of-life, while the RTX 4080 Mobile is active and was released on January 2, 2023.

Specification Differences

The two GPUs differ across nearly every major specification category. The CMP 70HX uses the GA104 chip on Samsung’s 8 nm process, while the RTX 4080 Mobile uses AD104 on TSMC’s 5 nm process. Transistor counts are 17,400 million versus 35,800 million, with die sizes of 392 mm² and 294 mm², respectively. Transistor density is 44.4M per mm² for the CMP 70HX and 121.8M per mm² for the RTX 4080 Mobile.

Clock speeds differ: the CMP 70HX has a base clock of 1365 MHz and boost of 1395 MHz, while the RTX 4080 Mobile runs at 1290 MHz base and 1665 MHz boost. Memory clocks are 1188 MHz (19 Gbps effective) for the CMP 70HX and 2250 MHz (18 Gbps effective) for the RTX 4080 Mobile. Memory size is 8 GB versus 12 GB, with bus widths of 256 bit and 192 bit, and bandwidths of 608.3 GB/s and 432.0 GB/s.

Compute resources are vastly different: shading units 3,840 versus 7,424; TMUs 120 versus 232; ROPs 64 versus 80; RT cores 30 versus 58; tensor cores 120 versus 232. Pixel rate is 89.28 GPixel/s versus 133.2 GPixel/s, and texture rate is 167.4 GTexel/s versus 386.3 GTexel/s. FP32 and FP16 are both 10.71 TFLOPS for the CMP 70HX and 24.72 TFLOPS for the RTX 4080 Mobile.

Physical and power characteristics diverge: the CMP 70HX is dual-slot with a 1x 12-pin connector and 200 W suggested PSU, while the RTX 4080 Mobile is an IGP with no connectors and no PSU suggestion. The CMP 70HX has a 267 mm length and 112 mm height, while the RTX 4080 Mobile has no listed dimensions. Bus interface is PCIe 1.0 x4 for the CMP 70HX versus PCIe 4.0 x16 for the RTX 4080 Mobile. Display outputs are absent on the CMP 70HX, whereas the RTX 4080 Mobile is portable device dependent. The CMP 70HX is end-of-life with no release date, while the RTX 4080 Mobile is active with a release date of January 2, 2023.