AMD Instinct MI455X vs NVIDIA GeForce RTX 5070 Ti SUPER Comparison

Where Each One Wins

The benchmark data splits these two accelerators into completely different performance domains. The AMD Instinct MI455X has no recorded benchmark entries in the database, meaning its performance profile cannot be quantified through the available test suite. The NVIDIA GeForce RTX 5070 Ti SUPER, by contrast, has one recorded benchmark result: a 3DMark Steel Nomad DX12 score of 6269.5, placing it at the 36th percentile among all GPUs in the database.

The use-case split is defined by what each card is built to do. The MI455X is a compute-oriented accelerator with a 2300 W thermal design power, no display outputs, and no graphics API support. The recorded data shows no DirectX, OpenGL, or Vulkan capability for the MI455X. The RTX 5070 Ti SUPER is a conventional graphics card with DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4, and three display outputs plus one HDMI output. Any workload requiring rasterization, ray tracing, or display output belongs to the NVIDIA part based on the data.

For pure compute throughput, the MI455X's shading unit count of 32768 and FP32 throughput of 157.3 TFLOPS indicate a massively parallel compute device. The RTX 5070 Ti SUPER delivers 43.94 TFLOPS FP32 from 8960 shading units. The MI455X also carries 432 GB of HBM4 memory with 23.3 TB/s bandwidth, versus 16 GB of GDDR7 at 896.0 GB/s for the NVIDIA card. Memory-bound workloads such as large model inference or high-resolution scientific simulation align with the MI455X's specifications. The RTX 5070 Ti SUPER wins in any scenario that requires graphics output, real-time rendering, or consumer software compatibility.

Architecture Differences

The two chips come from different design philosophies. The AMD Instinct MI455X uses the CDNA 5.0 architecture on a 2 nm TSMC process, while the NVIDIA GeForce RTX 5070 Ti SUPER uses Blackwell 2.0 on a 5 nm TSMC process. Both use TSMC as foundry, but the process generations differ substantially.

The MI455X die is 2990 mm² with 320,000 million transistors, yielding a transistor density of 107.0 million per mm². The RTX 5070 Ti SUPER die is 378 mm² with 45,600 million transistors, for a density of 120.6 million per mm². The AMD chip is roughly 7.9 times larger in die area and holds about 7 times more transistors, yet the NVIDIA chip achieves a higher packing density.

Memory architecture differs fundamentally. The MI455X uses HBM4 with a 24576-bit bus and 432 GB capacity. The RTX 5070 Ti SUPER uses GDDR7 with a 256-bit bus and 16 GB capacity. The MI455X memory clock is 1900 MHz with 7.6 Gbps effective data rate; the NVIDIA memory clock is 1750 MHz with 28 Gbps effective. The MI455X's 23.3 TB/s bandwidth is 26 times the RTX 5070 Ti SUPER's 896.0 GB/s.

Core organization also differs. The MI455X has 32768 shading units and 1024 texture mapping units, with zero ROPs and a pixel rate of 0 MPixel/s. The RTX 5070 Ti SUPER has 8960 shading units, 280 TMUs, 96 ROPs, 70 ray tracing cores, and 280 tensor cores, with a pixel rate of 235.4 GPixel/s. The MI455X texture rate is 2457.6 GTexel/s, versus 686.6 GTexel/s for the NVIDIA card.

Clock behavior differs as well. The MI455X has a 1000 MHz base clock and 2400 MHz boost. The RTX 5070 Ti SUPER has a 2295 MHz base and 2452 MHz boost. Despite lower clocks, the MI455X achieves far higher aggregate throughput due to its massive core count.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries comparing the two cards. The only available benchmark score belongs to the RTX 5070 Ti SUPER: 6269.5 in 3DMark Steel Nomad DX12, with an average score of 6270 across its recorded run. The MI455X has no benchmark scores and an average benchmark score of 0, placing it at the 50th percentile by database ranking, though this percentile reflects unmeasured status rather than performance.

The RTX 5070 Ti SUPER's nearest rivals in the database show its competitive position. The NVIDIA GeForce RTX 4070 Ti SUPER AD102 matches it exactly with an average score of 6270 and a delta of 0%. The NVIDIA Quadro K620 scores 6282, which is 0.2% higher. The AMD FirePro W600 scores 6223, which is 0.8% lower. The AMD Radeon R7 M350 scores 6327, which is 0.9% higher. These deltas are all within 1% of the RTX 5070 Ti SUPER's score, indicating that the single recorded benchmark places this card in a tight cluster of similar-scoring devices.

The FP32 throughput comparison is the clearest numerical differentiator. The MI455X delivers 157.3 TFLOPS, which is 3.58 times the RTX 5070 Ti SUPER's 43.94 TFLOPS. FP16 throughput matches FP32 on both cards at a 1:1 ratio, so the same multiplier applies in half-precision workloads. The MI455X also has a texture rate of 2457.6 GTexel/s, which is 3.58 times the NVIDIA card's 686.6 GTexel/s.

Memory bandwidth presents an even wider gap. The MI455X's 23.3 TB/s is 26 times the RTX 5070 Ti SUPER's 896.0 GB/s. Capacity differs by a factor of 27: 432 GB versus 16 GB. The MI455X's 24576-bit memory bus is 96 times wider than the NVIDIA card's 256-bit bus.

FAQ

Q: Which card has a recorded benchmark score in the database?

A: Only the NVIDIA GeForce RTX 5070 Ti SUPER has a recorded benchmark: 6269.5 in 3DMark Steel Nomad DX12, with an average score of 6270. The AMD Instinct MI455X has no benchmark entries and an average score of 0.

Q: How does the RTX 5070 Ti SUPER compare to its nearest rivals?

A: It matches the NVIDIA GeForce RTX 4070 Ti SUPER AD102 exactly at 6270 average score with 0% delta. The NVIDIA Quadro K620 is 0.2% faster, the AMD FirePro W600 is 0.8% slower, and the AMD Radeon R7 M350 is 0.9% faster.

Q: Does the MI455X support graphics APIs?

A: No. The recorded data lists DirectX, OpenGL, and Vulkan as N/A for the MI455X. It also has no display outputs. The RTX 5070 Ti SUPER supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, with 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs.

Q: What memory configurations do the two cards use?

A: The MI455X uses 432 GB of HBM4 on a 24576-bit bus with 23.3 TB/s bandwidth. The RTX 5070 Ti SUPER uses 16 GB of GDDR7 on a 256-bit bus with 896.0 GB/s bandwidth.

Q: Which card has ray tracing and tensor cores?

A: The RTX 5070 Ti SUPER has 70 ray tracing cores and 280 tensor cores. The MI455X lists no ray tracing or tensor core counts in the database.

Q: What are the thermal design power ratings?

A: The MI455X has a 2300 W TDP with a suggested power supply of 2700 W and no power connectors (it uses an EAM module slot). The RTX 5070 Ti SUPER has a 350 W TDP and uses a single 16-pin connector.

Specification Differences

The two cards differ across nearly every recorded specification field.

Process and die: MI455X uses 2 nm TSMC, 2990 mm² die, 320,000 million transistors, 107.0M/mm² density. RTX 5070 Ti SUPER uses 5 nm TSMC, 378 mm² die, 45,600 million transistors, 120.6M/mm² density.

Clocks: MI455X runs 1000 MHz base, 2400 MHz boost, 1900 MHz memory at 7.6 Gbps effective. RTX 5070 Ti SUPER runs 2295 MHz base, 2452 MHz boost, 1750 MHz memory at 28 Gbps effective.

Memory: MI455X has 432 GB HBM4 on a 24576-bit bus with 23.3 TB/s bandwidth. RTX 5070 Ti SUPER has 16 GB GDDR7 on a 256-bit bus with 896.0 GB/s bandwidth.

Compute units: MI455X has 32768 shading units, 1024 TMUs, 0 ROPs, 0 MPixel/s pixel rate, 2457.6 GTexel/s texture rate, 157.3 TFLOPS FP32, 157.3 TFLOPS FP16. RTX 5070 Ti SUPER has 8960 shading units, 280 TMUs, 96 ROPs, 70 RT cores, 280 tensor cores, 235.4 GPixel/s pixel rate, 686.6 GTexel/s texture rate, 43.94 TFLOPS FP32, 43.94 TFLOPS FP16.

Power and physical: MI455X has 2300 W TDP, EAM Module slot width, no power connectors, 2700 W suggested PSU, PCIe 6.0 x16 interface, no display outputs. RTX 5070 Ti SUPER has 350 W TDP, Dual-slot width, 1x 16-pin connector, PCIe 5.0 x16 interface, 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs, dimensions of 304 mm length, 137 mm height, 48 mm width.

APIs: MI455X lists N/A for DirectX, OpenGL, and Vulkan. RTX 5070 Ti SUPER lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release and status: MI455X released on 2026-07-22 with a Radeon Instinct predecessor and no launch MSRP. RTX 5070 Ti SUPER released on 2025-12-31, has an Active production status, and a launch MSRP of 749 USD.

The Verdict

The data supports a clear division of roles. The AMD Instinct MI455X is a compute accelerator with no graphics capability, no display outputs, no graphics API support, and no recorded benchmark scores. Its 157.3 TFLOPS FP32 throughput, 432 GB memory capacity, and 23.3 TB/s bandwidth place it in the category of large-scale compute hardware. The 2300 W TDP and EAM Module form factor confirm its data-center orientation.

The NVIDIA GeForce RTX 5070 Ti SUPER is a consumer graphics card with a recorded 3DMark Steel Nomad DX12 score of 6269.5, 36th percentile placement, and nearest rivals within 1% of its average score of 6270. It supports modern graphics APIs, includes 70 ray tracing cores and 280 tensor cores, and fits in a dual-slot form factor with a 350 W TDP.

A buyer needing graphics output, ray tracing, or consumer software compatibility should select the RTX 5070 Ti SUPER based on the recorded data. A workload requiring maximum FP32 throughput, massive memory capacity, or extreme memory bandwidth aligns with the MI455X specifications. The two cards do not compete in the same segment; the database shows one graphics card with measurable benchmark results and one compute accelerator with no benchmark presence.