AMD Radeon RX 6750 XT vs NVIDIA CMP 70HX Comparison

Where Each One Wins

The NVIDIA CMP 70HX and AMD Radeon RX 6750 XT occupy opposite ends of the performance spectrum, with each card claiming a decisive victory in a different workload category. The recorded data shows a clean split: the NVIDIA CMP 70HX dominates OpenCL compute workloads, while the AMD Radeon RX 6750 XT crushes Vulkan graphics performance.

For compute-oriented tasks, the NVIDIA CMP 70HX is the clear pick. Its Geekbench OpenCL score of 25,135 versus 16,360 for the AMD card represents a 53.6% advantage. This is a substantial margin that speaks to the Ampere architecture's raw compute throughput, particularly in scenarios that leverage its 120 tensor cores and 30 RT cores. The CMP 70HX sits in the 75th percentile of all GPUs in the database, while its average benchmark score of 30,476 places it within striking distance of the NVIDIA Tesla M60 (30,490, 0% delta) and slightly ahead of the AMD Radeon RX 6700 (30,433, 0.1% delta) and RX 6800 (30,095, 1.3% delta). This card was designed for mining, and its compute-heavy architecture shows in the numbers.

For graphics-intensive applications, especially those using Vulkan, the AMD Radeon RX 6750 XT is the undisputed winner. Its Geekbench Vulkan score of 98,089 dwarfs the NVIDIA CMP 70HX's 35,817, a 63.5% margin in AMD's favor. This is a massive difference that reflects the RDNA 2.0 architecture's gaming-oriented design, including 40 ray tracing cores and a higher boost clock of 2600 MHz. The RX 6750 XT's overall average benchmark score of 26,011 places it in the 71st percentile of all GPUs, with nearest rivals including the AMD Radeon R9 M395X (25,891, 0.5% delta) and the AMD FirePro W7100 (25,856, 0.6% delta). The card also posts strong results across a wider range of tests, including Passmark DirectX 9 (263), DirectX 11 (180), and DirectX 12 (80), plus a Passmark G3D score of 20,700.

The use-case split is stark: choose the NVIDIA CMP 70HX for compute-heavy workloads where OpenCL performance matters, and choose the AMD Radeon RX 6750 XT for gaming and graphics rendering where Vulkan efficiency is paramount. The CMP 70HX has no display outputs, reinforcing its purpose as a dedicated compute or mining accelerator, while the RX 6750 XT offers full display connectivity with 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Architecture Differences

The two cards come from fundamentally different design philosophies. The NVIDIA CMP 70HX is built on the Ampere architecture, using the GA104 chip manufactured on Samsung's 8 nm process. The AMD Radeon RX 6750 XT uses the RDNA 2.0 architecture with the Navi 22 chip, fabricated on TSMC's 7 nm node. This process difference matters: the AMD chip packs 17,200 million transistors into a 335 mm² die, achieving a transistor density of 51.3M per mm², while the NVIDIA chip has 17,400 million transistors on a larger 392 mm² die, resulting in a lower density of 44.4M per mm².

The memory subsystems diverge significantly. The NVIDIA CMP 70HX uses 8 GB of GDDR6X memory on a 256-bit bus, delivering 608.3 GB/s of bandwidth. The AMD Radeon RX 6750 XT instead offers 12 GB of GDDR6 memory on a 192-bit bus, with 432.0 GB/s of bandwidth. While the NVIDIA card has higher peak bandwidth, the AMD card provides 50% more capacity, which can be crucial for modern games and large datasets.

Compute resources are organized differently. The NVIDIA CMP 70HX has 3,840 shading units, 120 texture mapping units (TMUs), and 64 raster operation units (ROPs), alongside 30 RT cores and 120 tensor cores. The AMD Radeon RX 6750 XT has fewer shading units at 2,560, but more TMUs at 160 and the same 64 ROPs. It also features 40 RT cores and no tensor cores. These differences manifest in the measured performance: the AMD card achieves higher pixel and texture rates (166.4 GPixel/s and 416.0 GTexel/s versus 89.28 GPixel/s and 167.4 GTexel/s, respectively), while the NVIDIA card's FP32 throughput of 10.71 TFLOPS lags behind AMD's 13.31 TFLOPS.

Clock speeds tell a similar story. The NVIDIA CMP 70HX runs at a base clock of 1365 MHz and a boost clock of 1395 MHz, while the AMD Radeon RX 6750 XT operates at 2150 MHz base and 2600 MHz boost, with a game clock of 2495 MHz. The AMD card also supports FP16 at 26.62 TFLOPS (2:1 ratio), doubling its FP32 rate, whereas the NVIDIA card offers FP16 at a 1:1 ratio of 10.71 TFLOPS.

Head-to-Head Benchmarks

The head-to-head data in the database reveals two distinct performance profiles with no overlap. In the Geekbench OpenCL test, the NVIDIA CMP 70HX scores 25,135 against the AMD Radeon RX 6750 XT's 16,360. This 53.6% delta is one of the larger margins recorded between two cards in the same database tier. The NVIDIA card's advantage likely stems from its higher memory bandwidth and tensor core count, which are well-suited to OpenCL's parallel compute model.

The Geekbench Vulkan test flips the result dramatically. The AMD Radeon RX 6750 XT scores 98,089, while the NVIDIA CMP 70HX manages only 35,817. The 63.5% delta in AMD's favor is even larger than NVIDIA's OpenCL win. Vulkan is a low-overhead graphics API, and the AMD card's higher clock speeds, more TMUs, and dedicated ray tracing hardware appear to provide a significant edge in this workload. The RX 6750 XT also shows strong performance in other graphics tests: Passmark DirectX 9 at 263, DirectX 10 at 125, DirectX 11 at 180, and DirectX 12 at 80. Its Passmark G3D score of 20,700 and GPU compute score of 9,550 round out a versatile profile.

The average benchmark scores reflect these divergent strengths. The NVIDIA CMP 70HX has an average score of 30,476, placing it 0% behind the NVIDIA Tesla M60 and 0.1% ahead of the AMD Radeon RX 6700. The AMD Radeon RX 6750 XT, despite its Vulkan dominance, has a lower average of 26,011, sitting 0.5% ahead of the AMD Radeon R9 M395X. This discrepancy occurs because the RX 6750 XT's OpenCL score pulls its average down, while the CMP 70HX lacks Vulkan results that could boost its mean.

Specification Differences

The two cards differ across nearly every major specification category. The process node is the most fundamental split: Samsung 8 nm for NVIDIA versus TSMC 7 nm for AMD. The die sizes differ by 57 mm², with the NVIDIA GA104 at 392 mm² and the AMD Navi 22 at 335 mm². Transistor counts are nearly identical (17,400 million versus 17,200 million), but the density advantage goes to AMD at 51.3M per mm² versus 44.4M per mm².

Memory capacity and type are major divergences: 8 GB GDDR6X with 256-bit bus and 608.3 GB/s bandwidth for NVIDIA, versus 12 GB GDDR6 with 192-bit bus and 432.0 GB/s for AMD. The clock speeds favor AMD decisively, with a 2150 MHz base and 2600 MHz boost versus NVIDIA's 1365 MHz base and 1395 MHz boost. The AMD card also has a game clock of 2495 MHz, which the NVIDIA card lacks entirely.

Compute resources show a trade-off. NVIDIA has more shading units (3,840 versus 2,560) and tensor cores (120 versus none), but AMD has more TMUs (160 versus 120) and RT cores (40 versus 30). Both cards have 64 ROPs. The pixel and texture rates favor AMD (166.4 GPixel/s and 416.0 GTexel/s versus 89.28 GPixel/s and 167.4 GTexel/s), as does FP32 throughput (13.31 TFLOPS versus 10.71 TFLOPS). The AMD card also supports FP16 at 26.62 TFLOPS, while NVIDIA's FP16 is capped at 10.71 TFLOPS.

Power and connectivity differ as well. The NVIDIA CMP 70HX has no listed TDP, uses a single 12-pin power connector, and recommends a 200 W PSU. The AMD Radeon RX 6750 XT has a 250 W TDP, uses one 6-pin and one 8-pin connector, and recommends a 600 W PSU. The bus interface is a major gap: NVIDIA uses PCIe 1.0 x4, while AMD uses PCIe 4.0 x16. The NVIDIA card has no display outputs, whereas the AMD card provides 1x HDMI 2.1 and 3x DisplayPort 1.4a. The AMD card is also slightly shorter in height (110 mm versus 112 mm) and has a defined width of 40 mm, while the NVIDIA card's width is not recorded.

FAQ

Q: Which card has higher memory bandwidth?

A: The NVIDIA CMP 70HX has higher memory bandwidth at 608.3 GB/s, thanks to its 8 GB GDDR6X memory on a 256-bit bus. The AMD Radeon RX 6750 XT offers 432.0 GB/s from 12 GB GDDR6 on a 192-bit bus.

Q: Why does the AMD Radeon RX 6750 XT have a much higher Vulkan score?

A: The database shows a 63.5% margin in AMD's favor for Geekbench Vulkan (98,089 versus 35,817). This aligns with the card's higher clock speeds (2600 MHz boost versus 1395 MHz), more TMUs (160 versus 120), and more RT cores (40 versus 30), which are advantageous for Vulkan's graphics pipeline.

Q: Can the NVIDIA CMP 70HX be used for gaming with a display?

A: No. The NVIDIA CMP 70HX has no display outputs, making it unsuitable for direct gaming use. The AMD Radeon RX 6750 XT includes 1x HDMI 2.1 and 3x DisplayPort 1.4a for display connectivity.

Q: What is the average benchmark score for each card?

A: The NVIDIA CMP 70HX has an average benchmark score of 30,476, placing it in the 75th percentile of all GPUs. The AMD Radeon RX 6750 XT has an average score of 26,011, in the 71st percentile.

Q: How do the two cards compare in OpenCL performance?

A: The NVIDIA CMP 70HX leads OpenCL by 53.6%, scoring 25,135 versus 16,360 for the AMD Radeon RX 6750 XT. This makes the NVIDIA card the stronger choice for OpenCL-based compute workloads.

Q: Which card has a higher transistor density?

A: The AMD Radeon RX 6750 XT has a higher transistor density at 51.3M per mm², despite having slightly fewer total transistors (17,200 million versus 17,400 million). This is due to its smaller die size of 335 mm² versus 392 mm² for the NVIDIA CMP 70HX.