GPU Comparison

# AMD Radeon RX 7900 XT vs NVIDIA CMP 70HX

The Verdict

The AMD Radeon RX 7900 XT is the definitive winner in this comparison, and the data makes it a one-sided affair. Across the two shared benchmark tests, the RX 7900 XT wins both outright, with margins of 309.8% in Geekbench OpenCL and 357.4% in Geekbench Vulkan. The NVIDIA CMP 70HX, by contrast, is a mining-specific card with no display outputs, making it unsuitable for any conventional gaming or workstation use. The average benchmark scores tell a similar story: the RX 7900 XT sits at 38,358, while the CMP 70HX trails at 38,225, a gap of 0.3% in AMD's favor. The percentile ranking confirms the closeness in aggregate—the RX 7900 XT lands in the 82nd percentile of all GPUs, the CMP 70HX in the 81st—but the per-test deltas reveal a chasm in raw compute performance. For anyone building a system around gaming, content creation, or general compute, the RX 7900 XT is the only rational choice. The CMP 70HX is a niche product from the "Mining GPUs" generation, and its lack of display outputs and PCIe 1.0 x4 interface disqualify it from most real-world applications. The verdict is unambiguous: pick the RX 7900 XT unless your workload is specifically mining-focused and you have no need for video output.

Architecture Differences

The architectural divide between these two GPUs is fundamental, beginning with the manufacturing process. The AMD Radeon RX 7900 XT uses a 5 nm process at TSMC, while the NVIDIA CMP 70HX relies on an 8 nm process at Samsung. This node advantage is reflected in transistor density: the RX 7900 XT packs 109.1M transistors per mm², more than double the CMP 70HX's 44.4M per mm². The RX 7900 XT's Navi 31 chip contains 57,700 million transistors on a 529 mm² die, whereas the CMP 70HX's GA104 chip has just 17,400 million transistors on a 392 mm² die. The RDNA 3.0 architecture of the RX 7900 XT, codenamed Plum Bonito, represents a generational leap over the CMP 70HX's Ampere architecture. This is evident in the compute resources: the RX 7900 XT features 5,376 shading units, 336 texture mapping units, and 192 ROPs, against the CMP 70HX's 3,840 shading units, 120 TMUs, and 64 ROPs. Ray tracing hardware also differs sharply, with 84 RT cores on the AMD card versus 30 on the NVIDIA card. The CMP 70HX does have 120 tensor cores, which the RX 7900 XT lacks entirely, but this is a mining-oriented feature set. The RX 7900 XT's pixel rate is 459.6 GPixel/s compared to the CMP 70HX's 89.28 GPixel/s, and its texture rate reaches 804.4 GTexel/s versus 167.4 GTexel/s. FP32 compute is 51.48 TFLOPS on the AMD card versus 10.71 TFLOPS on the NVIDIA card, and the FP16 picture is even more lopsided: the RX 7900 XT delivers 103.0 TFLOPS (2:1 ratio), while the CMP 70HX is limited to 10.71 TFLOPS (1:1 ratio). The memory subsystems are equally divergent, with the RX 7900 XT offering 20 GB of GDDR6 on a 320-bit bus, versus 8 GB of GDDR6X on a 256-bit bus for the CMP 70HX.

Head-to-Head Benchmarks

The two shared benchmark tests produce overwhelming victories for the AMD Radeon RX 7900 XT, and the margins are so large that they redefine the competitive landscape. In Geekbench OpenCL, the RX 7900 XT scores 169,834, while the CMP 70HX manages only 41,446. That is a delta of 309.8%, meaning the AMD card is roughly four times faster in this compute workload. The Geekbench Vulkan test shows an even wider gap: the RX 7900 XT posts 160,119 against the CMP 70HX's 35,003, a delta of 357.4%. These are not incremental improvements; they are order-of-magnitude differences in raw throughput. To put these numbers in context, the nearest rival data shows both cards clustered tightly in aggregate scores. The RX 7900 XT's average of 38,358 sits just 0.3% above the CMP 70HX's 38,225, and both are within 0.6% of the NVIDIA GeForce RTX 4080 Mobile (38,135) and the NVIDIA GeForce MX570 (38,494). But the head-to-head tests reveal that the CMP 70HX's aggregate score is buoyed by its limited benchmark set—only two tests—whereas the RX 7900 XT's average spans ten tests including PassMark DirectX 9/10/11/12, PassMark G2D, and PassMark G3D. The CMP 70HX's specialization is evident: it lacks the breadth of benchmark coverage that the RX 7900 XT enjoys, and in the tests they do share, it is comprehensively outclassed. The data shows that the RX 7900 XT's wins are not just victories; they are routs.

Specification Differences

The specification sheets for these two cards diverge on nearly every measurable field. Clock speeds tell the first part of the story: the RX 7900 XT has a base clock of 1387 MHz and a boost clock of 2394 MHz, with a game clock of 2025 MHz, while the CMP 70HX operates at a base of 1365 MHz and a boost of just 1395 MHz. Memory clocks are also different—2500 MHz (20 Gbps effective) on the AMD card versus 1188 MHz (19 Gbps effective) on the NVIDIA card. Memory bandwidth is 800.0 GB/s for the RX 7900 XT versus 608.3 GB/s for the CMP 70HX. The power delivery systems are distinct: the RX 7900 XT requires 2x 8-pin connectors with a suggested PSU of 700 W, while the CMP 70HX uses a single 12-pin connector and a suggested PSU of 200 W. The bus interfaces could not be more different—PCIe 4.0 x16 for the AMD card versus PCIe 1.0 x4 for the NVIDIA card. Display outputs are a critical differentiator: the RX 7900 XT offers 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C, while the CMP 70HX has no outputs whatsoever. Physical dimensions are similar in length (276 mm for the AMD card, 267 mm for the NVIDIA card) and height (110 mm versus 112 mm), but the RX 7900 XT is 51 mm wide while the CMP 70HX's width is not specified. Both are dual-slot cards. The RX 7900 XT was released on 2022-11-02 with a launch MSRP of 899 USD, while the CMP 70HX has no release date and no MSRP listed. Both are end-of-life products. The API support is identical—DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4—but the underlying hardware capabilities are vastly different.

FAQ

Q: Which GPU has higher raw compute performance?

A: The AMD Radeon RX 7900 XT, by a wide margin. Its FP32 throughput is 51.48 TFLOPS versus 10.71 TFLOPS for the NVIDIA CMP 70HX, and its FP16 performance is 103.0 TFLOPS (2:1) versus 10.71 TFLOPS (1:1).

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

A: No. The CMP 70HX has no display outputs, so it cannot connect to a monitor. The RX 7900 XT, with its HDMI 2.1a, DisplayPort 2.1, and USB Type-C outputs, is the only card in this comparison suitable for gaming.

Q: How do the two cards compare in memory capacity and bandwidth?

A: The RX 7900 XT has 20 GB of GDDR6 on a 320-bit bus with 800.0 GB/s bandwidth, while the CMP 70HX has 8 GB of GDDR6X on a 256-bit bus with 608.3 GB/s bandwidth.

Q: What are the power requirements for each card?

A: The RX 7900 XT uses 2x 8-pin power connectors and has a suggested PSU of 700 W. The CMP 70HX uses a single 12-pin connector and has a suggested PSU of 200 W.

Q: Which card has better ray tracing capabilities?

A: The RX 7900 XT, with 84 RT cores compared to the CMP 70HX's 30 RT cores. The AMD card also has significantly more shading units (5,376 versus 3,840) and higher pixel and texture rates.

Q: Are these cards comparable in their aggregate benchmark scores?

A: They are close in average score—38,358 for the RX 7900 XT versus 38,225 for the CMP 70HX—but the RX 7900 XT wins every shared benchmark by margins of over 300%.

Where Each One Wins

The AMD Radeon RX 7900 XT wins in every category that matters for general-purpose computing and gaming. Its 20 GB of GDDR6 memory with 800.0 GB/s bandwidth is ideal for high-resolution textures and large datasets, while its 84 RT cores and 5,376 shading units deliver class-leading ray tracing and rasterization performance. The 51.48 TFLOPS FP32 compute, combined with a 5 nm process and PCIe 4.0 x16 interface, makes it a versatile performer for productivity, content creation, and gaming. The card's four display outputs—HDMI 2.1a, two DisplayPort 2.1, and USB Type-C—also provide flexible multi-monitor setups. The CMP 70HX, by contrast, has precisely one use case: cryptocurrency mining. Its 120 tensor cores and 8 GB of GDDR6X memory on a 256-bit bus are tailored for the repetitive compute workloads typical of mining algorithms, and its PCIe 1.0 x4 interface is sufficient for that purpose. The lack of display outputs is a deliberate design choice, as is the lower 10.71 TFLOPS FP32 throughput, which minimizes power draw (suggested PSU of 200 W versus 700 W for the AMD card). The CMP 70HX also benefits from a smaller die (392 mm² versus 529 mm²) and fewer transistors (17,400 million versus 57,700 million), which may appeal to operations prioritizing efficiency over performance. However, for any use case involving visual output, rendering, or general compute, the RX 7900 XT is categorically superior. The benchmark data shows a 309.8% lead in OpenCL and a 357.4% lead in Vulkan, and no amount of mining specialization can close that gap. The RX 7900 XT is the clear choice for gamers, creators, and professionals; the CMP 70HX should only be considered by miners who have no need for display output and value its lower power footprint.