AMD Instinct MI455X vs NVIDIA GeForce RTX 4070 Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for the AMD Instinct MI455X and the NVIDIA GeForce RTX 4070. The MI455X has no recorded benchmark scores, an average benchmark score of zero, and sits at the 50th percentile among all GPUs. The RTX 4070, by contrast, has ten recorded benchmark entries, an average benchmark score of 37,648, and sits at the 81st percentile.

The absence of overlapping measurements makes a direct performance comparison impossible from the recorded data. What the data does show is that the RTX 4070 delivers consistent results across multiple test suites. Its highest recorded score is 174,152 in Geekbench Vulkan, followed by 154,858 in Geekbench OpenCL. In Passmark tests, the RTX 4070 reaches 26,927 in G3D, 14,720 in GPU Compute, and 1,164 in G2D. The DirectX-specific Passmark scores are lower, ranging from 103 in DirectX 12 to 320 in DirectX 9.

The nearest rival data for the RTX 4070 places it in a tight cluster. The NVIDIA Tesla P4 scores 37,628, a delta of 0.1 percent, meaning the RTX 4070 is essentially tied with it. The AMD Radeon RX Vega 56 scores 37,507, a 0.4 percent gap. The NVIDIA GeForce RTX 4080 Mobile scores 38,135, which is 1.3 percent higher, and the AMD Radeon PRO W6400 scores 37,157, which is 1.3 percent lower. These deltas indicate that the RTX 4070's aggregate performance is nearly indistinguishable from these four rivals, with the largest spread being a 2.6 percent range from the lowest to the highest scorer.

For the MI455X, the lack of any benchmark data means there are no wins to record. The head-to-head benchmark array is empty, and the win count for both products is zero. This is not a statement about real-world capability; it is a statement about data availability. The MI455X is an accelerator with a 2300 W thermal design power and no display outputs, indicating a compute-oriented design, while the RTX 4070 is a consumer graphics card with display outputs and a 200 W thermal design power. Their intended workloads likely diverge, but the database cannot confirm any performance relationship between them.

FAQ

Q: Does the AMD Instinct MI455X have any recorded benchmark scores?

A: No. The MI455X has an empty benchmarks array, an average benchmark score of 0, and a percentile rank of 50 among all GPUs. It also has no nearest rivals listed.

Q: What is the highest recorded benchmark score for the NVIDIA GeForce RTX 4070?

A: The highest score is 174,152 in the Geekbench Vulkan test. The second highest is 154,858 in Geekbench OpenCL.

Q: How does the RTX 4070 compare to its nearest rivals in average benchmark score?

A: The RTX 4070 averages 37,648. The NVIDIA Tesla P4 is 0.1 percent behind, the AMD Radeon RX Vega 56 is 0.4 percent behind, the NVIDIA GeForce RTX 4080 Mobile is 1.3 percent ahead, and the AMD Radeon PRO W6400 is 1.3 percent behind.

Q: Which GPU has a higher percentile rank among all GPUs?

A: The NVIDIA GeForce RTX 4070 ranks at the 81st percentile, while the AMD Instinct MI455X ranks at the 50th percentile.

Q: Do the two GPUs share the same memory type?

A: No. The MI455X uses HBM4 memory with a capacity of 432 GB, while the RTX 4070 uses GDDR6X memory with a capacity of 12 GB.

Q: What is the production status of each GPU?

A: The RTX 4070 is listed as end-of-life. The MI455X has no production status recorded in the database.

Architecture Differences

The two GPUs come from different architectural families. The AMD Instinct MI455X uses CDNA 5.0 architecture, while the NVIDIA GeForce RTX 4070 uses Ada Lovelace. This is a fundamental divide: CDNA is AMD's compute-focused architecture, and Ada Lovelace is NVIDIA's graphics-oriented design.

The manufacturing processes differ. The MI455X is built on a 2 nm process at TSMC, while the RTX 4070 is built on a 5 nm process at the same foundry. The transistor counts diverge sharply. The MI455X contains 320,000 million transistors on a die size of 2990 mm², giving a transistor density of 107.0 million per mm². The RTX 4070 contains 35,800 million transistors on a 294 mm² die, giving a higher density of 121.8 million per mm². The MI455X die is over ten times larger in area but has a lower transistor density, reflecting a different design philosophy.

The compute resources are also in different leagues. The MI455X has 32,768 shading units, 1,024 texture mapping units, and zero ROPs. The RTX 4070 has 5,888 shading units, 184 texture mapping units, and 64 ROPs. The MI455X has no ray tracing cores and no tensor cores listed, while the RTX 4070 includes 46 ray tracing cores and 184 tensor cores. The RTX 4070 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the MI455X has no API support recorded for DirectX, OpenGL, or Vulkan.

The memory subsystems reflect their different missions. The MI455X uses HBM4 with a 24576-bit bus and 23.3 TB/s bandwidth. The RTX 4070 uses GDDR6X with a 192-bit bus and 504.2 GB/s bandwidth. The MI455X memory bandwidth is roughly 46 times higher, a gap that no measured benchmark can currently confirm or deny in practice.

Specification Differences

The recorded specifications show a clear separation in nearly every category. The MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz, while the RTX 4070 has a base clock of 1920 MHz and a boost clock of 2475 MHz. Memory clocks differ: the MI455X runs at 1900 MHz (7.6 Gbps effective), the RTX 4070 at 1313 MHz (21 Gbps effective).

Memory capacity and type are major differentiators. The MI455X has 432 GB of HBM4, the RTX 4070 has 12 GB of GDDR6X. Bus widths are 24576 bits versus 192 bits. Bandwidth is 23.3 TB/s versus 504.2 GB/s. The pixel rate for the MI455X is 0 MPixel/s, while the RTX 4070 delivers 158.4 GPixel/s. Texture rates are 2,457.6 GTexel/s for the MI455X and 455.4 GTexel/s for the RTX 4070.

Compute throughput shows the MI455X at 157.3 TFLOPS for both FP32 and FP16, with a 1:1 ratio. The RTX 4070 delivers 29.15 TFLOPS for both FP32 and FP16, also at 1:1. The thermal design power is 2300 W for the MI455X and 200 W for the RTX 4070. The suggested power supply is 2700 W for the MI455X and 550 W for the RTX 4070. The MI455X uses an EAM Module slot width and has no power connectors, while the RTX 4070 is dual-slot with a single 16-pin connector.

Bus interfaces differ: the MI455X uses PCIe 6.0 x16, the RTX 4070 uses PCIe 4.0 x16. Display outputs are absent on the MI455X, while the RTX 4070 has 1x HDMI 2.1 and 3x DisplayPort 1.4a. The RTX 4070 has physical dimensions of 240 mm length, 110 mm height, and 40 mm width. The MI455X has no dimensions recorded. Release dates are 2026-07-22 for the MI455X and 2023-04-11 for the RTX 4070. The RTX 4070 has a launch MSRP of 599 USD; the MI455X has no launch MSRP recorded.

The Verdict

The data supports a straightforward conclusion: the NVIDIA GeForce RTX 4070 is the only one of the two with measurable benchmark results. Its average benchmark score of 37,648 and 81st percentile rank come from ten separate tests. The AMD Instinct MI455X has no recorded scores, no rivals, and a 50th percentile rank that reflects its zero score.

For a user looking at the database, the RTX 4070 is the choice when benchmark data is required. The MI455X offers no measured performance evidence. However, the specification sheet tells a different story. The MI455X has 432 GB of HBM4 memory, 23.3 TB/s bandwidth, and 157.3 TFLOPS of FP32 compute. These are figures that dwarf the RTX 4070's 12 GB, 504.2 GB/s, and 29.15 TFLOPS. The MI455X is a compute accelerator with no display outputs and a 2300 W power draw; it is not a graphics card in the conventional sense.

The verdict depends on context. For graphics workloads, the RTX 4070 has recorded data showing it competes closely with the Tesla P4, RX Vega 56, RTX 4080 Mobile, and Radeon PRO W6400. For compute-heavy tasks, the MI455X's specifications suggest a different class of hardware, but the database cannot confirm its performance. Neither product wins a head-to-head because no head-to-head test exists.

Where Each One Wins

The NVIDIA GeForce RTX 4070 wins in every category where data exists. It has ten benchmark scores covering DirectX 9, 10, 11, and 12, OpenCL, Vulkan, G2D, G3D, and GPU compute. Its percentile rank of 81 places it well above the MI455X's 50. Its nearest rival deltas show it is competitive with four other GPUs, all within a 2.6 percent spread. For any workload that requires a display output, the RTX 4070 is the only option, as the MI455X has no display outputs.

The AMD Instinct MI455X wins in raw specification comparisons. It has more memory (432 GB versus 12 GB), more bandwidth (23.3 TB/s versus 504.2 GB/s), more shading units (32,768 versus 5,888), more texture units (1,024 versus 184), and higher FP32 throughput (157.3 TFLOPS versus 29.15 TFLOPS). It runs on a newer process node (2 nm versus 5 nm) and uses a newer PCIe interface (6.0 x16 versus 4.0 x16). Its transistor count is nearly nine times higher.

The practical split is clear. The RTX 4070 wins for any user who needs measured performance, graphics APIs, or a physical card that fits in a standard slot with a 550 W power supply. The MI455X wins for a user who needs massive memory capacity, extreme bandwidth, or compute density, provided they can supply 2700 W and do not need a display. The database cannot say how the MI455X performs in those tasks, but its specifications indicate it was built for them.