AMD Instinct MI355X vs NVIDIA GeForce RTX 5070 Comparison

Where Each One Wins

The recorded data shows a complete functional separation between these two accelerators. The AMD Instinct MI355X has no display outputs, exposes no graphics APIs (DirectX, OpenGL, and Vulkan are all listed as N/A), and reports a pixel rate of 0 MPixel/s with 0 ROPs. It is not a graphics card in any conventional sense; the database classifies it under the Instinct (MIx) generation, and its form factor is an OAM Module with no power connectors. Every benchmark in the database for this device returns a score of zero, placing it at the 50th percentile against all GPUs.

The NVIDIA GeForce RTX 5070 wins every measurable graphics workload. It ships with 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and delivers 80 ROPs with a pixel rate of 201.0 GPixel/s. Its 10 recorded benchmarks span DirectX 9 through DirectX 12, compute, and 2D tests. The RTX 5070 sits at the 82nd percentile against all GPUs, with an average benchmark score of 40377, while the MI355X has no recorded average score.

The use-case split is therefore absolute. The MI355X targets data-center scale compute with 288 GB of HBM3e memory, an 8192-bit bus, and 8.19 TB/s of bandwidth. The RTX 5070 targets client-side rendering and general GPU compute with 12 GB of GDDR7 on a 192-bit bus delivering 672.0 GB/s. For any task requiring a display, rasterization, ray tracing, or standard graphics APIs, the RTX 5070 is the only option with recorded support. For memory-bound server workloads, the MI355X provides a vastly larger memory pool and fabric-level bandwidth, but the database contains no benchmark scores to quantify its compute performance.

Architecture Differences

The two devices diverge at every architectural level. The MI355X uses the CDNA 4.0 architecture on TSMC's 3 nm process, built around the MI350 256CU chip. The die measures 2380 mm² and contains 185,000 million transistors, yielding a density of 77.7M transistors per mm². The RTX 5070 uses the Blackwell 2.0 architecture on TSMC's 5 nm process, with the GB205 chip measuring 263 mm² and containing 31,100 million transistors, for a density of 118.3M per mm². The MI355X has a far larger die and more than five times the transistor count, but the RTX 5070 packs transistors more densely.

Clock behavior also differs sharply. The MI355X has a base clock of 1000 MHz and a boost of 2400 MHz. The RTX 5070 runs at a base of 2325 MHz and boosts to 2512 MHz. Memory clocks are 2000 MHz (8 Gbps effective) for the MI355X versus 1750 MHz (28 Gbps effective) for the RTX 5070. The effective data rate favors the RTX 5070, but the MI355X compensates with an 8192-bit interface versus 192-bit, producing 8.19 TB/s versus 672.0 GB/s.

Shader resources are similarly lopsided. The MI355X has 16384 shading units and 1024 TMUs, with a texture rate of 2,457.6 GTexel/s and FP32 throughput of 78.64 TFLOPS. The RTX 5070 has 6144 shading units, 192 TMUs, and 80 ROPs, with 482.3 GTexel/s and 30.87 TFLOPS FP32. Both list FP16 at a 1:1 ratio with FP32. The MI355X has no RT cores or tensor cores listed, while the RTX 5070 includes 48 RT cores and 192 tensor cores. The MI355X has no ROPs, which explains its zero pixel rate.

Power and physical design reinforce the split. The MI355X has a TDP of 1400 W with a suggested PSU of 1800 W, an OAM Module slot width, and dimensions of 102 mm by 165 mm. The RTX 5070 has a TDP of 250 W with a 600 W suggested PSU, a dual-slot design, one 16-pin connector, and dimensions of 245 mm by 115 mm by 40 mm. Both use PCIe 5.0 x16. The MI355X has no display outputs, whereas the RTX 5070 has four. The MI355X has no launch MSRP in the database; the RTX 5070 has a launch MSRP of 549 USD. Release dates are 2025-06-11 for the MI355X and 2025-03-03 for the RTX 5070.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark comparisons between the MI355X and the RTX 5070, and the MI355X has no individual benchmark scores. The only quantitative performance data available comes from the RTX 5070's benchmark suite, which cannot be compared against any MI355X figure. The wins count is 0 for the MI355X and 0 for the RTX 5070 in head-to-head terms because no shared tests exist.

For the RTX 5070 alone, the recorded scores show strong graphics throughput. In 3DMark Steel Nomad DX12, it scores 5077. Geekbench results are 172660 for OpenCL and 178923 for Vulkan. Passmark scores include 29137 for G3D, 15787 for GPU compute, 1305 for G2D, 320 for DirectX 9, 277 for DirectX 11, 180 for DirectX 10, and 108 for DirectX 12. The average benchmark score across all 10 tests is 40377.

The nearest rivals for the RTX 5070, based on average score, are all older or lower-tier parts. The AMD Radeon Pro 580 scores 40318, a delta of 0.1% above the RTX 5070, making them statistically tied. The AMD Radeon Pro WX 7100 scores 40063, or 0.8% below. The AMD Radeon Pro 5300 scores 40870, which is 1.2% above, and the NVIDIA RTX A500 Mobile scores 39568, 2.0% below. These deltas indicate that the RTX 5070 sits in a cluster where the largest recorded gap to any neighbor is only two percent, meaning its average score is representative of a tightly grouped performance tier rather than an outlier.

The MI355X has no nearest rivals listed and no percentile comparison beyond its 50th percentile standing, which reflects a device with zero recorded benchmark participation. The data cannot support any claim of relative performance for the MI355X against any other accelerator. The absence of scores is itself the finding: the database has no measurement for this part, so any performance assertion would be unsupported.

The Verdict

The data indicates two products with mutually exclusive intended uses. The AMD Instinct MI355X is a server accelerator with 288 GB of HBM3e, an 8192-bit bus, 8.19 TB/s of bandwidth, 16384 shading units, and 78.64 TFLOPS of FP32 compute. It has no graphics outputs, no graphics API support, no ROPs, and a 1400 W TDP. It is built for compute density in an OAM form factor, and the database records no benchmark scores for it. The NVIDIA GeForce RTX 5070 is a client graphics card with 12 GB of GDDR7, 80 ROPs, 48 RT cores, 192 tensor cores, full DirectX 12 Ultimate support, four display outputs, and a 250 W TDP. It has 10 recorded benchmark scores with an average of 40377 and sits at the 82nd percentile.

Users requiring a display output, ray tracing, tensor operations, or any standard graphics workload should select the RTX 5070, as it is the only one of the two with recorded capability in those areas. Users requiring the largest possible memory footprint and memory bandwidth for server-side compute, where display output is irrelevant, should select the MI355X, based solely on its memory and compute specifications. The MI355X offers 24 times the memory capacity and over 12 times the memory bandwidth of the RTX 5070, along with 2.5 times the FP32 throughput. The RTX 5070 offers graphics features the MI355X does not list at all.

The RTX 5070's nearest rival data shows it within two percent of four other GPUs in average score, so its measured performance is not exceptional within its own tier. The MI355X cannot be compared to anything in the database because it has no scores. The choice between these two is therefore not a performance comparison but a functional one: the RTX 5070 is the only option with any recorded graphics or gaming capability, while the MI355X is the only option with server-scale memory. The database contains no evidence that either part can substitute for the other's role.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI355X lists 78.64 TFLOPS FP32, while the NVIDIA GeForce RTX 5070 lists 30.87 TFLOPS FP32, giving the MI355X roughly 2.5 times the FP32 throughput.

Q: Does the AMD Instinct MI355X support DirectX or Vulkan?

A: No. The database lists DirectX, OpenGL, and Vulkan as N/A for the MI355X, and it has no display outputs. The RTX 5070 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the memory capacity difference?

A: The MI355X has 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX 5070 has 12 GB of GDDR7 on a 192-bit bus with 672.0 GB/s bandwidth.

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

A: Its average benchmark score is 40377. The AMD Radeon Pro 580 is 0.1% higher, the AMD Radeon Pro WX 7100 is 0.8% lower, the AMD Radeon Pro 5300 is 1.2% higher, and the NVIDIA RTX A500 Mobile is 2.0% lower.

Q: Which card has ray tracing and tensor cores?

A: The RTX 5070 lists 48 RT cores and 192 tensor cores. The MI355X lists no RT cores and no tensor cores in the database.

Q: What is the power requirement for each?

A: The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The RTX 5070 has a TDP of 250 W and a suggested PSU of 600 W.