AMD Instinct MI455X vs NVIDIA GeForce RTX 4070 SUPER Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark results between the AMD Instinct MI455X and the NVIDIA GeForce RTX 4070 SUPER. The MI455X has no benchmark entries in the database, while the RTX 4070 SUPER has a substantial set of measured scores. This asymmetry means the comparison must rely on the architectural specifications and the RTX 4070 SUPER's established performance profile relative to its own peer group.

For the RTX 4070 SUPER, the database shows a representative set of results across several test suites. In 3DMark Steel Nomad DX12, the card records 4627 points. Geekbench OpenCL returns 172795, while Geekbench Vulkan reaches 205624. Passmark results are mixed: DirectX 10 scores 167, DirectX 11 scores 273, DirectX 12 scores 110, and DirectX 9 scores 344. The 2D graphics test produces 1184, while the 3D graphics test yields 29995. GPU compute in Passmark registers 17108. The average benchmark score across all entries stands at 43223.

The MI455X carries an avgBenchmarkScore of 0 and a percentileVsAllGpus of 50. The RTX 4070 SUPER, by contrast, achieves a percentileVsAllGpus of 83. This places the GeForce card in the upper tier of all recorded GPUs, while the Instinct part has no measured performance data to establish a comparable standing. The RTX 4070 SUPER's nearest rivals in the database include the NVIDIA Quadro M6000 24 GB with an average score of 43262 and a delta of -0.1 percent, the NVIDIA GeForce RTX 5050 Mobile at 43268 with a -0.1 percent delta, the NVIDIA Quadro M6000 at 43301 with a -0.2 percent delta, and the NVIDIA GeForce RTX 4090 Mobile at 43667 with a -1 percent delta. These deltas indicate that the RTX 4070 SUPER sits within a tight cluster of similarly performing cards, trailing the fastest of them by roughly one percent.

Architecture Differences

The two accelerators diverge fundamentally in their design goals. The AMD Instinct MI455X is a compute-focused accelerator built on the CDNA 5.0 architecture, fabricated on a 2 nm process at TSMC. The RTX 4070 SUPER uses NVIDIA's Ada Lovelace architecture on a 5 nm process, also from TSMC. The MI455X uses the MI450 256CU chip, while the RTX 4070 SUPER uses the AD104 die.

Transistor counts reveal the scale difference. The MI455X packs 320,000 million transistors on a die size of 2990 mm², yielding a transistor density of 107.0 million per mm². The RTX 4070 SUPER contains 35,800 million transistors on a 294 mm² die, with a density of 121.8 million per mm². The Instinct chip is roughly ten times larger in die area and nearly nine times larger in transistor count, though its lower density suggests a design optimized for massive compute arrays rather than dense packing.

Memory subsystems are equally divergent. The MI455X uses HBM4 memory totaling 432 GB across a 24576-bit bus, producing 23.3 TB/s of bandwidth. The RTX 4070 SUPER uses 12 GB of GDDR6X on a 192-bit bus, delivering 504.2 GB/s. The Instinct's memory bandwidth is more than forty-six times higher. Clock specifications differ as well: the MI455X runs a 1000 MHz base and 2400 MHz boost, with memory at 1900 MHz (7.6 Gbps effective). The RTX 4070 SUPER runs a 1980 MHz base and 2475 MHz boost, with memory at 1313 MHz (21 Gbps effective).

Compute resources are starkly different. The MI455X has 32768 shading units, 1024 TMUs, and no ROPs, producing a texture rate of 2,457.6 GTexel/s and a pixel rate of 0 MPixel/s. FP32 and FP16 throughput both register at 157.3 TFLOPS with a 1:1 ratio. The RTX 4070 SUPER has 7168 shading units, 224 TMUs, and 80 ROPs, generating a texture rate of 554.4 GTexel/s and a pixel rate of 198.0 GPixel/s. Its FP32 and FP16 figures are both 35.48 TFLOPS. The Instinct's FP32 throughput is 4.4 times higher, while its texture rate is 4.4 times higher. The RTX 4070 SUPER has dedicated RT cores (56) and tensor cores (224), while the MI455X lists neither.

Power and physical design also differ. The MI455X has a TDP of 2300 W, a suggested PSU of 2700 W, and an EAM Module slot width with no power connectors and no display outputs. The RTX 4070 SUPER has a TDP of 220 W, a suggested PSU of 550 W, a dual-slot form factor with a 1x 16-pin connector, and display outputs including 1x HDMI 2.1 and 3x DisplayPort 1.4a. The MI455X uses PCIe 6.0 x16, while the RTX 4070 SUPER uses PCIe 4.0 x16. API support is absent on the Instinct (DirectX, OpenGL, and Vulkan all listed as N/A), while the RTX 4070 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The MI455X dominates in raw compute throughput and memory capacity. Its 157.3 TFLOPS FP32 (and matching FP16) performance is four times higher than the RTX 4070 SUPER's 35.48 TFLOPS in both precisions. The 432 GB HBM4 memory dwarfs the 12 GB GDDR6X, and the 23.3 TB/s bandwidth is in a different category entirely. The 24576-bit bus enables memory access patterns that the 192-bit bus of the RTX 4070 SUPER cannot approach. For workloads that scale with memory capacity and bandwidth, such as large-model inference or scientific simulation, the MI455X is the clear choice based on specifications.

The RTX 4070 SUPER wins in every area related to graphics and consumer-facing functionality. It has 80 ROPs and a pixel rate of 198.0 GPixel/s, whereas the MI455X has zero ROPs and a zero pixel rate. The RTX 4070 SUPER includes 56 RT cores and 224 tensor cores, hardware features entirely absent from the MI455X. Display outputs are present on the RTX 4070 SUPER, absent on the MI455X. API compatibility is complete on the NVIDIA part, with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the AMD part supports none of these. The RTX 4070 SUPER also carries a far lower power requirement (220 W TDP versus 2300 W) and a smaller physical footprint (267 mm length, 112 mm height, 42 mm width) compared to the EAM Module form factor of the MI455X.

FAQ

Q: Which card has higher FP32 compute throughput?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32, which is 4.4 times the 35.48 TFLOPS of the NVIDIA GeForce RTX 4070 SUPER.

Q: What is the memory size difference?

A: The MI455X has 432 GB of HBM4 memory, while the RTX 4070 SUPER has 12 GB of GDDR6X. The former offers 36 times more capacity.

Q: Does the MI455X support DirectX or Vulkan?

A: No. The MI455X lists DirectX, OpenGL, and Vulkan all as N/A. The RTX 4070 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the power consumption difference?

A: The MI455X has a TDP of 2300 W with a suggested PSU of 2700 W. The RTX 4070 SUPER has a TDP of 220 W with a suggested PSU of 550 W.

Q: Which card has better benchmark percentile standing?

A: The RTX 4070 SUPER holds a percentileVsAllGpus of 83, with an average benchmark score of 43223. The MI455X has a percentileVsAllGpus of 50 and an average score of 0 due to no recorded benchmarks.

Q: Are there any display outputs on the MI455X?

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

Specification Differences

The two products differ in nearly every measurable field. Process node: 2 nm for the MI455X, 5 nm for the RTX 4070 SUPER. Transistors: 320,000 million versus 35,800 million. Die size: 2990 mm² versus 294 mm². Transistor density: 107.0M per mm² versus 121.8M per mm². Base clock: 1000 MHz versus 1980 MHz. Boost clock: 2400 MHz versus 2475 MHz. Memory clock: 1900 MHz (7.6 Gbps effective) versus 1313 MHz (21 Gbps effective). Memory size: 432 GB versus 12 GB. Memory type: HBM4 versus GDDR6X. Bus width: 24576 bit versus 192 bit. Bandwidth: 23.3 TB/s versus 504.2 GB/s. Shading units: 32768 versus 7168. TMUs: 1024 versus 224. ROPs: 0 versus 80. RT cores: absent versus 56. Tensor cores: absent versus 224. Pixel rate: 0 MPixel/s versus 198.0 GPixel/s. Texture rate: 2,457.6 GTexel/s versus 554.4 GTexel/s. FP32: 157.3 TFLOPS versus 35.48 TFLOPS. FP16: 157.3 TFLOPS versus 35.48 TFLOPS. TDP: 2300 W versus 220 W. Slot width: EAM Module versus dual-slot. Power connectors: none versus 1x 16-pin. Suggested PSU: 2700 W versus 550 W. Bus interface: PCIe 6.0 x16 versus PCIe 4.0 x16. Display outputs: none versus 1x HDMI 2.1 and 3x DisplayPort 1.4a. API support: N/A versus DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4. Dimensions: not recorded for the MI455X; the RTX 4070 SUPER is 267 mm long, 112 mm high, and 42 mm wide. Release dates: the MI455X is dated 2026-07-22, the RTX 4070 SUPER is dated 2024-01-16. Production status: the RTX 4070 SUPER is end-of-life, while the MI455X has no recorded status. Predecessor: the MI455X lists Radeon Instinct, the RTX 4070 SUPER lists GeForce 30. Successor: the MI455X lists none, the RTX 4070 SUPER lists GeForce 50. Launch MSRP: the MI455X has none recorded, the RTX 4070 SUPER has 599 USD.

The Verdict

The data presents two accelerators with almost no functional overlap. The AMD Instinct MI455X is a compute-only device: no ROPs, no display outputs, no graphics API support, and a 2300 W power envelope. Its strengths are purely in raw number crunching and memory scale. The 157.3 TFLOPS FP32 throughput, 432 GB HBM4, and 23.3 TB/s bandwidth position it for workloads that require massive parallel computation and enormous data residency. The zero pixel rate and absent RT/tensor cores confirm it is not intended for rendering or consumer graphics.

The NVIDIA GeForce RTX 4070 SUPER is a complete graphics processor. It has ROPs, RT cores, tensor cores, display outputs, and full API support. Its 35.48 TFLOPS FP32 is lower by a factor of 4.4, and its 12 GB memory is a fraction of the Instinct's capacity, but it delivers a measured average benchmark score of 43223 and an 83rd percentile standing among all recorded GPUs. Its nearest rivals score within one percent, indicating a tightly competitive performance tier.

Users should select the MI455X if the task requires extreme FP32 or FP16 throughput, vast memory capacity, or bandwidth beyond the terabyte-per-second range. These specifications point to high-performance computing, large-scale AI training, or scientific workloads that can use 432 GB of HBM4. Users should select the RTX 4070 SUPER if the task involves rendering, ray tracing, tensor operations, display output, or any standard graphics API. The recorded benchmark scores confirm it as a functional, competitive graphics card, and its 220 W TDP makes it practical for conventional systems. The MI455X has no benchmark scores to validate real-world performance, so its capabilities rest entirely on recorded specifications. The RTX 4070 SUPER has measured results across multiple suites, giving it a verified performance profile.