AMD Instinct MI355X vs AMD Radeon RX 9050 OEM Comparison

Head-to-Head Benchmarks

The recorded database entries for the AMD Instinct MI355X and the AMD Radeon RX 9050 OEM contain no aggregate benchmark scores. Neither part has a populated average benchmark score field, and the head-to-head benchmark table is empty. The percentile versus all GPUs is identical for both at the 50th percentile, with both also holding an average benchmark score of 0. This indicates that the database currently lacks direct performance measurements for these two accelerators, making a numerical comparison of application performance impossible.

What the data does provide is a clear contrast in raw compute specifications. The Instinct MI355X delivers 78.64 TFLOPS of FP32 throughput, while the Radeon RX 9050 OEM delivers 10.65 TFLOPS. That is a 7.4x difference in single-precision floating-point performance, a massive gap driven by the respective chip designs. The texture rate tells a similar story: the MI355X processes 2,457.6 GTexel/s versus 166.4 GTexel/s for the RX 9050 OEM. The pixel rate, however, is inverted. The MI355X reports 0 MPixel/s, as it has no ROPs and no display outputs, while the RX 9050 OEM achieves 166.4 GPixel/s. The MI355X is not built to rasterize frames; it is built for compute throughput.

The memory subsystem reinforces this split. The MI355X comes with 288 GB of HBM3e memory across an 8192-bit bus, yielding 8.19 TB/s of bandwidth. The RX 9050 OEM uses 4 GB of GDDR6 on a 64-bit bus, producing 144.0 GB/s. The MI355X has 57x more memory bandwidth and 72x more memory capacity. The FP16 figures mirror FP32 exactly for both parts, with the MI355X at 78.64 TFLOPS and the RX 9050 OEM at 10.65 TFLOPS, both listed as 1:1 ratios. The absence of benchmark scores means these are the only quantifiable performance indicators available, and they point to two entirely different operating envelopes.

Architecture Differences

The architectural split is fundamental. The Instinct MI355X uses the MI350 chip with 256 compute units, built on CDNA 4.0 architecture, while the Radeon RX 9050 OEM uses the Navi 44 chip with RDNA 4.0 architecture. The manufacturing processes differ: the MI355X is fabricated on a 3 nm node at TSMC, and the RX 9050 OEM uses a 4 nm node, also at TSMC. Transistor counts reflect the scale difference: the MI355X packs 185,000 million transistors on a 2380 mm² die, while the RX 9050 OEM has 29,700 million transistors on a 199 mm² die. The transistor density is higher on the smaller chip: 149.2M per mm² for Navi 44 versus 77.7M per mm² for the MI350.

Clock behavior differs as well. The MI355X has a base clock of 1000 MHz and a boost clock of 2400 MHz, with no game clock listed. The RX 9050 OEM has a base of 1330 MHz, a boost of 2600 MHz, and a game clock of 1920 MHz. The RX 9050 OEM runs at higher frequencies across the board, but the MI355X compensates with far more execution resources. The MI355X has 16,384 shading units and 1,024 TMUs, against 1,024 shading units and 64 TMUs for the RX 9050 OEM. The RX 9050 OEM includes 64 ROPs and 16 ray tracing cores; the MI355X lists 0 ROPs and no ray tracing core count in the database.

Memory technology is another divider. The MI355X uses HBM3e with a 2000 MHz memory clock and 8 Gbps effective data rate, while the RX 9050 OEM uses GDDR6 at 2250 MHz and 18 Gbps effective. The bus widths are 8192-bit versus 64-bit, and the resulting bandwidth gap is enormous. The power envelopes reflect their roles: the MI355X carries a TDP of 1400 W and requires an 1800 W suggested PSU, while the RX 9050 OEM has a 92 W TDP and a 250 W suggested PSU. The MI355X is an OAM module with no power connectors and no display outputs; the RX 9050 OEM is a dual-slot card with a single 8-pin connector and one HDMI 2.1b plus two DisplayPort 2.1a outputs.

API support also separates them. The RX 9050 OEM supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI355X lists N/A for DirectX, OpenGL, and Vulkan, indicating it has no graphics API stack. The RX 9050 OEM is in the Radeon RX 9000 series, has a production status of Active, and succeeds the Navi III generation. The MI355X belongs to the Instinct (MIx) generation and lists Radeon Instinct as its predecessor. Release dates in the database are June 11, 2025 for the MI355X and July 27, 2026 for the RX 9050 OEM.

Where Each One Wins

The Instinct MI355X wins in every category related to raw compute density and memory capacity. Its 78.64 TFLOPS FP32 rating is 7.4x higher than the RX 9050 OEM, and its 288 GB HBM3e pool with 8.19 TB/s bandwidth is in a different class entirely. The 8192-bit bus width enables data movement that the 64-bit GDDR6 interface cannot approach. The 1,024 TMUs and 16,384 shading units give the MI355X a massive advantage in shader-heavy and texture-heavy workloads, provided those workloads do not require fixed-function graphics output. The 3 nm process node and 185,000 million transistor budget allow the MI355X to sustain high compute throughput, albeit with a 1400 W TDP and no display capability.

The Radeon RX 9050 OEM wins in graphics-oriented and efficiency-focused scenarios. Its 166.4 GPixel/s pixel rate and 64 ROPs enable actual frame rendering, which the MI355X cannot perform at all. The 16 ray tracing cores provide hardware acceleration for ray-traced effects, a feature entirely absent from the MI355X's specification sheet. The RX 9050 OEM also has a 92 W TDP versus 1400 W, making it suitable for conventional desktop integration with a dual-slot cooler and a single 8-pin power connector. Its 2600 MHz boost clock is 200 MHz higher than the MI355X's boost, and its 18 Gbps effective memory clock is more than double the MI355X's 8 Gbps, though on a far narrower bus. The RX 9050 OEM supports modern graphics APIs, including DirectX 12 Ultimate and Vulkan 1.4, which the MI355X lacks entirely.

The game clock of 1920 MHz on the RX 9050 OEM suggests sustained graphics workloads, while the MI355X has no game clock listed. Display outputs on the RX 9050 OEM (HDMI 2.1b and DisplayPort 2.1a) confirm its role as a graphics card. The MI355X has no outputs, reinforcing its accelerator-only purpose. The RX 9050 OEM's 29,700 million transistors on a 199 mm² die give it a higher transistor density (149.2M per mm²) than the MI355X, indicating a more compact, efficiency-oriented design despite the older 4 nm node.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS of FP32 performance, which is 7.4x higher than the AMD Radeon RX 9050 OEM's 10.65 TFLOPS.

Q: Can the Instinct MI355X output video to a display?

A: No. The MI355X has no display outputs and lists N/A for DirectX, OpenGL, and Vulkan support. The Radeon RX 9050 OEM has 1x HDMI 2.1b and 2x DisplayPort 2.1a outputs.

Q: What are the memory capacities and types for each card?

A: The Instinct MI355X uses 288 GB of HBM3e memory with an 8192-bit bus and 8.19 TB/s bandwidth. The Radeon RX 9050 OEM uses 4 GB of GDDR6 with a 64-bit bus and 144.0 GB/s bandwidth.

Q: How do the power requirements compare?

A: The Instinct MI355X has a TDP of 1400 W and suggests an 1800 W PSU. The Radeon RX 9050 OEM has a TDP of 92 W and suggests a 250 W PSU.

Q: Does the Radeon RX 9050 OEM support ray tracing?

A: Yes, it has 16 ray tracing cores and supports DirectX 12 Ultimate (12_2). The Instinct MI355X has no listed ray tracing cores and no graphics API support.

Q: Which GPU has a higher boost clock?

A: The Radeon RX 9050 OEM has a boost clock of 2600 MHz, while the Instinct MI355X has a boost clock of 2400 MHz. The RX 9050 OEM also lists a game clock of 1920 MHz; the MI355X does not list a game clock.

The Verdict

The data defines two distinct products with no overlap in intended use. The AMD Instinct MI355X is a compute accelerator built for massive parallel workloads. Its 78.64 TFLOPS FP32 rating, 288 GB HBM3e memory, and 8.19 TB/s bandwidth position it for data-center scale problems. The absence of display outputs, graphics APIs, and ROPs confirms it is not a graphics card. The 1400 W TDP and OAM module form factor require infrastructure that only a server environment provides. The 3 nm process and 185,000 million transistors indicate a design optimized for density of compute per die, not per watt.

The AMD Radeon RX 9050 OEM is a conventional graphics card. Its 166.4 GPixel/s pixel rate, 64 ROPs, and 16 ray tracing cores enable rendering workloads, and its DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support make it compatible with standard graphics software stacks. The 92 W TDP and dual-slot design with a single 8-pin connector fit a standard desktop power envelope. The 4 GB GDDR6 memory on a 64-bit bus is limited for large datasets, but the 2600 MHz boost clock and 18 Gbps effective memory speed serve latency-sensitive graphics tasks. The 4 nm process and 29,700 million transistors on a 199 mm² die show a compact, efficiency-focused chip.

The benchmark database records no direct performance scores for either part, so the verdict rests on architectural specifications. For compute throughput, memory bandwidth, and capacity, the MI355X is the only choice. For rendering, display output, and desktop integration, the RX 9050 OEM is the only option. The MI355X's 0 MPixel/s pixel rate and N/A API support rule it out for graphics. The RX 9050 OEM's 10.65 TFLOPS and 144.0 GB/s bandwidth rule it out for large-scale compute. The release dates, June 11, 2025 for the MI355X and July 27, 2026 for the RX 9050 OEM, place the RX 9050 OEM as the later product, but the architectures serve separate markets. Neither part can substitute for the other.