AMD Instinct MI455X vs AMD Radeon 8050S Comparison

FAQ

Q: What are the core architectural differences between the AMD Instinct MI455X and the AMD Radeon 8050S?

A: The MI455X uses the CDNA 5.0 architecture on a 2 nm TSMC process with the MI450 256CU chip, while the 8050S uses RDNA 3.5 on a 4 nm TSMC process with the Strix Halo chip. The MI455X has 32768 shading units, 1024 TMUs, and 0 ROPs, whereas the 8050S has 2048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores.

Q: How do their memory subsystems compare?

A: The MI455X features 432 GB of HBM4 memory on a 24576-bit bus with 23.3 TB/s bandwidth and a memory clock of 1900 MHz (7.6 Gbps effective). The 8050S uses system shared memory with system dependent bandwidth, meaning it relies on the host system's RAM rather than dedicated VRAM.

Q: What is the performance difference in compute throughput?

A: The MI455X delivers 157.3 TFLOPS FP32 and FP16 (1:1), while the 8050S delivers 11.47 TFLOPS FP32 and FP16 (1:1). The MI455X is approximately 13.7 times higher in raw FP32 throughput.

Q: What are their power requirements?

A: The MI455X has a TDP of 2300 W and a suggested PSU of 2700 W, with no power connectors (EAM Module slot). The 8050S has a TDP of 55 W, no power connectors, and no suggested PSU listed, as it is an IGP (integrated graphics processor).

Q: What API support does each card offer?

A: The MI455X lists no APIs (DirectX N/A, OpenGL N/A, Vulkan N/A), reflecting its compute-focused design. The 8050S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, making it suitable for gaming and general graphics workloads.

Q: How do their release dates and production statuses differ?

A: The MI455X has a release date of July 22, 2026, with no production status listed. The 8050S was released January 5, 2025, and is marked as Active in production.

Where Each One Wins

The AMD Instinct MI455X dominates in raw compute density and memory bandwidth. Its 157.3 TFLOPS FP32 throughput and 23.3 TB/s memory bandwidth make it suited for massive parallel workloads, large-scale matrix operations, and high-capacity data processing. The 432 GB HBM4 frame buffer allows models and datasets to reside entirely in GPU memory, eliminating host-device transfers. Its 24576-bit bus is among the widest available, supporting sustained throughput for memory-bound operations.

The AMD Radeon 8050S wins in power efficiency and graphics feature support. At 55 W TDP versus 2300 W, it operates at a fraction of the power envelope, making it deployable in portable devices. Its 32 ray tracing cores and DirectX 12 Ultimate support enable hardware-accelerated ray tracing and modern graphics APIs. The 8050S also integrates display outputs (portable device dependent), whereas the MI455X has no display outputs. The 8050S achieves an 89th percentile ranking among all GPUs in the database, while the MI455X sits at the 50th percentile with no recorded benchmark scores.

Architecture Differences

The MI455X uses CDNA 5.0, AMD's compute-optimized architecture, built on TSMC's 2 nm process. The chip, designated MI450 256CU, packs 320,000 million transistors into a 2990 mm² die, yielding a transistor density of 107.0M per mm². The architecture has no ROPs, no ray tracing cores, and no API support, indicating a pure compute accelerator design.

The 8050S uses RDNA 3.5, AMD's graphics-oriented architecture, on TSMC's 4 nm process. The Strix Halo chip has a 308 mm² die size; transistor count is unknown. It includes 64 ROPs and 32 ray tracing cores, enabling rasterization and ray-traced rendering. The 8050S supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, covering modern graphics workloads.

The memory architectures differ fundamentally. The MI455X uses dedicated HBM4 with a 24576-bit interface and 23.3 TB/s bandwidth, designed for data-center scale workloads. The 8050S uses system shared memory, with bandwidth dependent on the host platform, a design choice for integrated graphics in mobile systems.

The MI455X has a base clock of 1000 MHz and boost clock of 2400 MHz. The 8050S has a higher base clock of 1295 MHz and boost clock of 2800 MHz, reflecting its power-efficient design and smaller scale.

Specification Differences

The two cards differ across nearly every specification field. The MI455X uses a 2 nm process; the 8050S uses 4 nm. Die size is 2990 mm² versus 308 mm². Transistor count is 320,000 million for the MI455X; unknown for the 8050S.

Shading units: 32768 versus 2048. TMUs: 1024 versus 128. ROPs: 0 versus 64. The 8050S has 32 ray tracing cores; the MI455X has none.

Memory: 432 GB HBM4 at 23.3 TB/s versus system shared memory. Bus width: 24576 bit versus system shared. Memory clock: 1900 MHz (7.6 Gbps effective) versus system shared.

Pixel rate: 0 MPixel/s versus 179.2 GPixel/s. Texture rate: 2457.6 GTexel/s versus 358.4 GTexel/s. FP32: 157.3 TFLOPS versus 11.47 TFLOPS.

TDP: 2300 W versus 55 W. Slot width: EAM Module versus IGP. Suggested PSU: 2700 W versus none. Bus interface: PCIe 6.0 x16 versus PCIe 5.0 x16.

Display outputs: none versus portable device dependent. APIs: none versus DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4.

Release dates: July 22, 2026 versus January 5, 2025. Production status: none listed versus Active.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark results between the MI455X and the 8050S. The MI455X has no benchmark entries and an average score of 0, placing it at the 50th percentile among all GPUs. The 8050S has two recorded benchmarks: Geekbench OpenCL score of 65818 and Geekbench Vulkan score of 58398, with an average benchmark score of 62108, placing it at the 89th percentile.

The 8050S's nearest rivals provide context. The AMD Radeon Pro W6600M scores 61896, making the 8050S 0.3% faster. The AMD Radeon Pro Vega 56 scores 63693, putting the 8050S 2.5% behind. The AMD Radeon RX 7600M scores 63775, 2.6% ahead of the 8050S. The AMD Radeon RX 9060 XT LP scores 63830, 2.7% ahead. These margins place the 8050S in a tight cluster near the upper mid-range of mobile GPUs.

The MI455X's compute figures indicate a different performance class entirely. Its 157.3 TFLOPS FP32 output is 13.7 times the 8050S's 11.47 TFLOPS. Its texture rate of 2457.6 GTexel/s is 6.9 times the 8050S's 358.4 GTexel/s. Memory bandwidth of 23.3 TB/s dwarfs the system-dependent bandwidth of the 8050S. However, the MI455X has zero pixel throughput, while the 8050S delivers 179.2 GPixel/s, making the 8050S the only one of the two capable of rasterized graphics output.

The MI455X's power draw of 2300 W with a 2700 W suggested PSU is 41.8 times the 8050S's 55 W TDP. The 8050S's performance per watt is therefore substantially higher, though the MI455X's absolute throughput is in a different tier.

The Verdict

The data indicates two accelerators built for different purposes. The AMD Instinct MI455X is a compute-oriented accelerator with 157.3 TFLOPS FP32, 432 GB HBM4 memory, and 23.3 TB/s bandwidth. It has no display outputs, no graphics APIs, and no ROPs. Its 2300 W TDP and 2700 W suggested PSU place it in data-center or dedicated compute environments. The 50th percentile ranking with no benchmark scores reflects its status as a specialized device without general graphics workloads.

The AMD Radeon 8050S is a graphics-oriented integrated processor with 11.47 TFLOPS FP32, 32 ray tracing cores, and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its 55 W TDP and portable device dependent display outputs suit mobile systems. The 89th percentile ranking, supported by Geekbench OpenCL and Vulkan scores, confirms its strength in general GPU workloads.

Buyers requiring raw compute throughput, massive memory capacity, and extreme bandwidth should select the MI455X. Its 157.3 TFLOPS and 23.3 TB/s bandwidth serve workloads where graphics output is irrelevant. Buyers needing graphics rendering, ray tracing, and modern API support in a low-power package should select the 8050S. Its 179.2 GPixel/s pixel rate and 32 ray tracing cores handle gaming and visual workloads. The 8050S also has an Active production status, while the MI455X has no production status listed.

The MI455X has no recorded benchmark scores, meaning its real-world performance cannot be verified against the 8050S in the database. The 8050S's recorded scores show it competing closely with the AMD Radeon Pro W6600M, Pro Vega 56, RX 7600M, and RX 9060 XT LP, with deltas between 0.3% and 2.7%. These margins indicate the 8050S performs in line with established mobile GPUs. The MI455X's specifications suggest far higher compute capacity, but without benchmark data, direct comparison is limited to specification-level analysis.