AMD Instinct MI355X vs NVIDIA GeForce RTX 5070 Ti Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI355X and the NVIDIA GeForce RTX 5070 Ti. The MI355X has no recorded benchmark scores, an average benchmark score of zero, and a percentile rank of 50 among all GPUs. The RTX 5070 Ti, by contrast, has a full benchmark suite with an average score of 49,957 and a percentile rank of 86.

The RTX 5070 Ti’s individual scores show a wide spread across tests. In 3DMark Steel Nomad DX12, it records 6,604 points. Geekbench OpenCL returns 212,363, while Geekbench Vulkan reaches 225,122. Passmark results are lower in magnitude but internally consistent: DirectX 9 scores 351, DirectX 11 scores 300, DirectX 10 scores 192, and DirectX 12 scores 127. The Passmark G3D score is 32,974, while GPU compute scores 20,203, and G2D scores 1,332.

Because the MI355X has no benchmark entries, the comparison is asymmetric. The recorded data allows only a one-sided analysis: the RTX 5070 Ti’s performance relative to its own rivals, not relative to the MI355X. The nearest rivals for the RTX 5070 Ti are the AMD Radeon RX Vega 64 (average score 50,001, delta -0.1%), the Intel Arc A550M (average score 49,737, delta 0.4%), the AMD Radeon RX 6900 XT (average score 50,951, delta -2%), and the AMD Radeon RX 6800 XT (average score 48,477, delta 3.1%). This places the RTX 5070 Ti in a tight cluster, less than 3.1% from any rival on either side.

The MI355X’s percentile of 50 with zero scores indicates an unmeasured or unrated state in the database, not a performance tier. The RTX 5070 Ti’s percentile of 86 reflects its position above the vast majority of recorded GPUs. Benchmark results indicate that the RTX 5070 Ti is a mid-to-high-tier consumer card, while the MI355X currently has no empirical data to interpret.

The Verdict

From the recorded data alone, the RTX 5070 Ti is the only unit with measurable performance. Its average benchmark score of 49,957 and percentile rank of 86 show it competes directly with the RX 6900 XT (50,951, 2% higher), the RX Vega 64 (50,001, 0.1% higher), and the RX 6800 XT (48,477, 3.1% lower). The Intel Arc A550M is essentially level at 49,737, just 0.4% lower. These deltas are small, meaning the RTX 5070 Ti sits in a competitive band where no single rival dominates by more than a few percent.

The MI355X has no benchmark scores, no wins, and no losses in the head-to-head table. Its percentile of 50 is the default for unrated entries. The data cannot support a verdict on its real-world performance. Any selection between these two cards must rely on the architectural and specification differences detailed below, since the benchmark database provides no comparative numbers.

The RTX 5070 Ti is the choice for any workload requiring validated performance metrics. The MI355X is a server accelerator with no measured results, so its suitability cannot be assessed from the database. The data shows that the RTX 5070 Ti’s performance is well-characterized and competitive with its named rivals, while the MI355X remains an unknown quantity in benchmark terms.

Architecture Differences

The MI355X uses AMD’s CDNA 4.0 architecture on a 3 nm process at TSMC, with 185,000 million transistors on a 2380 mm² die. The transistor density is 77.7 million per square millimeter. The RTX 5070 Ti uses NVIDIA’s Blackwell 2.0 architecture on a 5 nm process, also at TSMC, with 45,600 million transistors on a 378 mm² die, giving a density of 120.6 million per square millimeter. The MI355X has roughly four times the transistor count and over six times the die area, but the RTX 5070 Ti has a higher transistor density.

The MI355X is built around 16,384 shading units, 1,024 texture mapping units, and 0 raster output units. Its pixel rate is 0 MPixel/s, and its texture rate is 2,457.6 GTexel/s. It has no RT cores, no tensor cores, and no display outputs. The RTX 5070 Ti has 8,960 shading units, 280 TMUs, 96 ROPs, 70 RT cores, and 280 tensor cores. Its pixel rate is 235.4 GPixel/s, and its texture rate is 686.6 GTexel/s. The MI355X has nearly double the shading units and over 3.5 times the TMUs, but it lacks the fixed-function raster hardware and ray tracing units present in the RTX 5070 Ti.

The MI355X’s FP32 throughput is 78.64 TFLOPS, and its FP16 throughput is also 78.64 TFLOPS with a 1:1 ratio. The RTX 5070 Ti delivers 43.94 TFLOPS in both FP32 and FP16, also at 1:1. The MI355X has a 79% higher FP32 figure. The MI355X’s memory subsystem uses 288 GB of HBM3e on an 8192-bit bus, with 8.19 TB/s of bandwidth. The RTX 5070 Ti uses 16 GB of GDDR7 on a 256-bit bus, with 896.0 GB/s of bandwidth. The MI355X has 18 times the memory capacity and over 9 times the bandwidth.

The MI355X does not support DirectX, OpenGL, or Vulkan according to the database, while the RTX 5070 Ti supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI355X has no display outputs, while the RTX 5070 Ti has 1x HDMI 2.1b and 3x DisplayPort 2.1b. Both use PCIe 5.0 x16.

Specification Differences

The two cards differ in nearly every measured specification. The MI355X has a base clock of 1000 MHz and a boost clock of 2400 MHz, with memory clocked at 2000 MHz (8 Gbps effective). The RTX 5070 Ti has a base clock of 2295 MHz and a boost clock of 2452 MHz, with memory at 1750 MHz (28 Gbps effective). The RTX 5070 Ti has significantly higher base and boost clocks, while the MI355X has a much wider memory bus.

Memory capacity differs by a factor of 18: 288 GB versus 16 GB. Memory type differs as HBM3e versus GDDR7. Bus width differs from 8192 bits to 256 bits. Bandwidth differs from 8.19 TB/s to 896.0 GB/s. The MI355X has no ROPs, while the RTX 5070 Ti has 96. The MI355X has 1,024 TMUs versus 280. Shading units are 16,384 versus 8,960. RT cores are absent on the MI355X, while the RTX 5070 Ti has 70. Tensor cores are absent on the MI355X, while the RTX 5070 Ti has 280.

Power consumption differs substantially: the MI355X has a TDP of 1400 W with a suggested PSU of 1800 W, while the RTX 5070 Ti has a TDP of 300 W with a suggested PSU of 700 W. The MI355X uses an OAM Module slot width and has no power connectors, while the RTX 5070 Ti is dual-slot with a 1x 16-pin connector. Physical dimensions differ: the MI355X is 102 mm long and 165 mm wide, while the RTX 5070 Ti is 304 mm long, 137 mm high, and 48 mm wide.

Release dates differ by roughly four months: the MI355X launched on 2025-06-11, and the RTX 5070 Ti on 2025-02-19. The MI355X has no launch MSRP in the database, while the RTX 5070 Ti has a launch MSRP of 749 USD. The MI355X’s predecessor is Radeon Instinct, while the RTX 5070 Ti’s predecessor is GeForce 40 and its successor is GeForce 60. The RTX 5070 Ti has an active production status, while the MI355X’s status is not recorded.

The MI355X has no API support entries, while the RTX 5070 Ti has full DirectX, OpenGL, and Vulkan support. The MI355X has no display outputs, while the RTX 5070 Ti has four. The MI355X’s die size is 2380 mm² versus 378 mm², and its transistor count is 185,000 million versus 45,600 million.

FAQ

Q: Which GPU has higher FP32 performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS in FP32, while the NVIDIA GeForce RTX 5070 Ti delivers 43.94 TFLOPS. The MI355X is approximately 79% higher.

Q: What are the memory capacities and bandwidths?

A: The MI355X has 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX 5070 Ti has 16 GB of GDDR7 on a 256-bit bus with 896.0 GB/s bandwidth.

Q: Does the RTX 5070 Ti support ray tracing?

A: Yes, the RTX 5070 Ti has 70 RT cores. The MI355X has no RT cores, no tensor cores, and no display outputs.

Q: What is the average benchmark score for each card?

A: The MI355X has an average benchmark score of 0 with no recorded tests. The RTX 5070 Ti has an average benchmark score of 49,957, with its best individual test being Geekbench Vulkan at 225,122.

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

A: The RTX 5070 Ti is 0.1% below the RX Vega 64, 0.4% above the Intel Arc A550M, 2% below the RX 6900 XT, and 3.1% above the RX 6800 XT. All deltas are within a narrow band.

Q: What are the power requirements?

A: The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The RTX 5070 Ti has a TDP of 300 W and a suggested PSU of 700 W. The MI355X has no power connectors, while the RTX 5070 Ti uses a 1x 16-pin connector.