AMD Instinct MI455X vs NVIDIA GeForce RTX 4070 GDDR6 Comparison

Head-to-Head Benchmarks

The recorded data for this comparison is highly asymmetric. The AMD Instinct MI455X has no benchmark entries in the database, yielding an average benchmark score of zero and a percentile rank of 50 among all GPUs. The NVIDIA GeForce RTX 4070 GDDR6 has one recorded benchmark result, the 3DMark Steel Nomad DX12 test, where it scored 4334.5 points. Its average benchmark score is 4335, placing it at the 25th percentile of all GPUs.

Comparing the two directly requires interpreting the missing data for the MI455X. The absence of benchmark results for the MI455X does not indicate performance equivalence or inferiority. It indicates that no standardized gaming or graphics workload results have been recorded for this accelerator. The MI455X is positioned as a compute-oriented product, while the RTX 4070 GDDR6 is a consumer graphics card, and their intended workloads differ substantially.

The RTX 4070 GDDR6's nearest rivals in the database offer context for its performance tier. The Intel Iris Pro Graphics 5200 scores 4360, which is 0.6% higher than the RTX 4070 GDDR6. The NVIDIA GeForce 930M scores 4388, 1.2% higher. The AMD FirePro W2100 scores 4295, which is 0.9% lower, and the NVIDIA GeForce GTX 460M scores 4282, 1.2% lower. These deltas are small, ranging from 1.2% ahead to 1.2% behind, which indicates that the RTX 4070 GDDR6's single recorded score places it in a narrow competitive band around these older or lower-tier parts.

The MI455X, by contrast, has no nearest rivals listed, no wins recorded, and no benchmark scores. The head-to-head benchmark array between the two products is empty. This means the database contains no direct comparison results where both cards ran the same test. The wins counters show zero wins for both the MI455X and the RTX 4070 GDDR6 in any head-to-head matchup.

The FP32 compute figures provide a separate quantitative comparison. The MI455X delivers 157.3 TFLOPS of FP32 performance. The RTX 4070 GDDR6 delivers 29.15 TFLOPS. This is a large gap, with the MI455X offering roughly five times the raw FP32 throughput on paper. Similarly, FP16 performance is listed as 157.3 TFLOPS (1:1) for the MI455X and 29.15 TFLOPS (1:1) for the RTX 4070 GDDR6, maintaining the same ratio. These figures come from the specification fields, not from benchmark runs, so they represent theoretical peak rates rather than measured workload results.

Texture rate follows the same pattern. The MI455X has a texture rate of 2,457.6 GTexel/s, while the RTX 4070 GDDR6 has 455.4 GTexel/s. The pixel rate tells a different story: the MI455X is listed at 0 MPixel/s with 0 ROPs, while the RTX 4070 GDDR6 has a pixel rate of 158.4 GPixel/s with 64 ROPs. The MI455X appears to lack traditional raster output units entirely, which is consistent with a compute accelerator that has no display outputs.

The Verdict

The data supports a clear functional split. The AMD Instinct MI455X is an accelerator with no display outputs, no raster operations pipeline, and no recorded graphics benchmarks. It uses HBM4 memory totaling 432 GB with a 24576-bit bus and 23.3 TB/s of bandwidth. Its power specification is 2300 W TDP with a suggested power supply of 2700 W. This is not a card for standard graphics workloads or gaming.

The NVIDIA GeForce RTX 4070 GDDR6 is a consumer graphics card with display outputs (1x HDMI 2.1 and 3x DisplayPort 1.4a), 12 GB of GDDR6 memory on a 192-bit bus, 480.0 GB/s of bandwidth, and a 200 W TDP with a suggested 550 W power supply. It has a recorded 3DMark Steel Nomad DX12 score of 4334.5 and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its production status is end-of-life, and its launch MSRP is 599 USD.

Benchmark results indicate that the RTX 4070 GDDR6 is the only one of the two with measurable graphics performance in the database. The MI455X has no such data, so any claim of graphics superiority for either part would lack support. For compute throughput, the specification data heavily favors the MI455X in FP32, FP16, texture rate, memory capacity, and memory bandwidth. For graphics rendering and consumer display output, the RTX 4070 GDDR6 is the only option with the necessary hardware.

The verdict from the data is that these products serve different purposes. The MI455X targets compute environments where massive memory capacity and raw throughput matter. The RTX 4070 GDDR6 targets gaming and consumer graphics workloads where rendering pipelines, API support, and display connectivity are required.

Where Each One Wins

The MI455X wins on raw compute specifications. Its FP32 throughput of 157.3 TFLOPS is 5.4 times the RTX 4070 GDDR6's 29.15 TFLOPS. Its FP16 output matches its FP32 at 157.3 TFLOPS, while the RTX 4070 GDDR6 also runs FP16 at 1:1 but at only 29.15 TFLOPS. The texture rate of 2,457.6 GTexel/s versus 455.4 GTexel/s gives the MI455X a 5.4 times advantage as well. Memory capacity is 432 GB versus 12 GB, a 36 times difference. Memory bandwidth is 23.3 TB/s versus 480.0 GB/s, roughly 48.5 times higher. The bus width of 24576 bits versus 192 bits is a 128 times difference.

The RTX 4070 GDDR6 wins on graphics-specific features. It has 64 ROPs and a 158.4 GPixel/s pixel rate, while the MI455X has 0 ROPs and 0 MPixel/s. The RTX 4070 GDDR6 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI455X lists N/A for all three APIs. The RTX 4070 GDDR6 has display outputs; the MI455X has none. The RTX 4070 GDDR6 also has 46 ray tracing cores and 184 tensor cores, while the MI455X lists null for both. The MI455X has 32768 shading units versus 5888 for the RTX 4070 GDDR6, and 1024 TMUs versus 184, but these do not translate into graphics wins without a rendering pipeline.

The RTX 4070 GDDR6 also wins on power efficiency based on the specified figures. It draws 200 W TDP versus 2300 W for the MI455X, and its suggested power supply is 550 W versus 2700 W. The physical footprint is smaller as well: the RTX 4070 GDDR6 is 240 mm long, 110 mm high, and 40 mm wide, while the MI455X has no listed dimensions but uses an EAM Module slot width. The RTX 4070 GDDR6 is dual-slot, uses a single 16-pin power connector, and connects via PCIe 4.0 x16. The MI455X uses PCIe 6.0 x16 and has no power connectors listed.

FAQ

Q: Which card has a higher recorded benchmark score?

A: Only the NVIDIA GeForce RTX 4070 GDDR6 has a recorded benchmark score in the database: 4334.5 in 3DMark Steel Nomad DX12. The AMD Instinct MI455X has no benchmark entries and an average score of 0.

Q: How does the RTX 4070 GDDR6 compare to its nearest rivals?

A: Its 4334.5 score is 0.6% below the Intel Iris Pro Graphics 5200 (4360), 1.2% below the NVIDIA GeForce 930M (4388), 0.9% above the AMD FirePro W2100 (4295), and 1.2% above the NVIDIA GeForce GTX 460M (4282).

Q: What is the memory capacity difference?

A: The MI455X has 432 GB of HBM4 memory on a 24576-bit bus with 23.3 TB/s bandwidth. The RTX 4070 GDDR6 has 12 GB of GDDR6 on a 192-bit bus with 480.0 GB/s bandwidth.

Q: Does the MI455X support graphics APIs?

A: No. The database lists DirectX, OpenGL, and Vulkan support as N/A for the MI455X. The RTX 4070 GDDR6 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which card has display outputs?

A: The RTX 4070 GDDR6 has 1x HDMI 2.1 and 3x DisplayPort 1.4a. The MI455X has no display outputs.

Q: What are the power requirements for each?

A: The MI455X has a 2300 W TDP and a suggested power supply of 2700 W. The RTX 4070 GDDR6 has a 200 W TDP and a suggested power supply of 550 W.

Architecture Differences

The MI455X uses the CDNA 5.0 architecture on the MI450 256CU chip. The RTX 4070 GDDR6 uses the Ada Lovelace architecture on the AD104 chip. The MI455X is built on a 2 nm process at TSMC, while the RTX 4070 GDDR6 uses a 5 nm process, also at TSMC. The MI455X has 320,000 million transistors on a 2990 mm² die, giving a transistor density of 107.0M per mm². The RTX 4070 GDDR6 has 35,800 million transistors on a 294 mm² die, with a density of 121.8M per mm². The MI455X die is roughly ten times larger in area and holds roughly nine times more transistors.

The MI455X belongs to the Instinct (MIx) generation with a predecessor listed as Radeon Instinct. The RTX 4070 GDDR6 belongs to the GeForce 40-series, with a predecessor of GeForce 30 and a successor of GeForce 50. The MI455X has no listed successor. The MI455X uses HBM4 memory, while the RTX 4070 GDDR6 uses GDDR6. The MI455X has 32768 shading units and 1024 TMUs, while the RTX 4070 GDDR6 has 5888 shading units and 184 TMUs. The MI455X has 0 ROPs, while the RTX 4070 GDDR6 has 64. The RTX 4070 GDDR6 includes 46 ray tracing cores and 184 tensor cores, while the MI455X lists neither.

The MI455X uses an EAM Module slot width and has no power connectors. The RTX 4070 GDDR6 is dual-slot with one 16-pin power connector. The MI455X connects via PCIe 6.0 x16, while the RTX 4070 GDDR6 uses PCIe 4.0 x16. The MI455X has no display outputs; the RTX 4070 GDDR6 has HDMI and DisplayPort outputs.

Specification Differences

The two products differ in nearly every measured specification field. The MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz. The RTX 4070 GDDR6 has a base clock of 1920 MHz and a boost clock of 2475 MHz. Memory clock is 1900 MHz (7.6 Gbps effective) for the MI455X versus 2500 MHz (20 Gbps effective) for the RTX 4070 GDDR6. The MI455X has 432 GB of HBM4 on a 24576-bit bus with 23.3 TB/s bandwidth. The RTX 4070 GDDR6 has 12 GB of GDDR6 on a 192-bit bus with 480.0 GB/s bandwidth.

The MI455X delivers 157.3 TFLOPS in both FP32 and FP16. The RTX 4070 GDDR6 delivers 29.15 TFLOPS in both. Texture rates are 2,457.6 GTexel/s for the MI455X and 455.4 GTexel/s for the RTX 4070 GDDR6. Pixel rates are 0 MPixel/s for the MI455X and 158.4 GPixel/s for the RTX 4070 GDDR6. The MI455X has a TDP of 2300 W and a suggested power supply of 2700 W. The RTX 4070 GDDR6 has a TDP of 200 W and a suggested power supply of 550 W.

The RTX 4070 GDDR6 has physical dimensions of 240 mm length, 110 mm height, and 40 mm width. The MI455X has no listed dimensions. The RTX 4070 GDDR6 has a production status of end-of-life and a release date of 2024-08-19. The MI455X has a release date of 2026-07-22 and no listed production status. The RTX 4070 GDDR6 has a launch MSRP of 599 USD. The MI455X has no launch MSRP listed. The RTX 4070 GDDR6 has a single 16-pin power connector, while the MI455X lists no power connectors. The RTX 4070 GDDR6 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4; the MI455X lists N/A for all three. The RTX 4070 GDDR6 sits at the 25th percentile of all GPUs with an average score of 4335. The MI455X sits at the 50th percentile with an average score of 0.