AMD Instinct MI455X vs AMD Radeon RX 7600 XT Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI455X and the AMD Radeon RX 7600 XT. The head-to-head benchmark array is empty, and neither product records any wins in that category. This means a conventional numerical comparison based on shared application tests is not possible from the recorded data.

The MI455X has an average benchmark score of 0 and sits at the 50th percentile among all GPUs in the database. It has no nearest rivals listed, which reflects the absence of comparable benchmark data. The RX 7600 XT, by contrast, has an average benchmark score of 17,083, placing it at the 60th percentile. Its nearest rivals include the NVIDIA GeForce GTX 690 (average score 17,037, delta 0.3% higher than the RX 7600 XT), the AMD Radeon HD 7970M (17,019, delta 0.4%), the NVIDIA GeForce RTX 3070 (17,208, delta -0.7%), and the NVIDIA Tesla M4 (16,932, delta 0.9%). These deltas are tiny, indicating the RX 7600 XT performs within a very narrow band around these older or differently classed parts.

For the MI455X, the only measurable specifications are raw hardware figures, not application scores. Its FP32 compute is 157.3 TFLOPS, its texture rate is 2,457.6 GTexel/s, and its memory bandwidth is 23.3 TB/s. The RX 7600 XT delivers 22.57 TFLOPS FP32, 352.6 GTexel/s, and 288.0 GB/s memory bandwidth. These are not directly comparable benchmark scores, but they indicate an enormous gap in raw compute throughput, with the MI455X delivering roughly seven times the FP32 throughput and more than eighty times the memory bandwidth on paper. However, the MI455X has no display outputs, no DirectX, OpenGL, or Vulkan support, and a pixel rate of 0 MPixel/s, meaning it cannot run the same graphics workloads as the RX 7600 XT.

Thus, the head-to-head section is defined by absence. The RX 7600 XT has measurable benchmark data; the MI455X does not. Any performance comparison must therefore rely on architectural and specification differences rather than direct test scores.

Architecture Differences

The two accelerators share a manufacturer but diverge completely in architecture, process, and design goals. The MI455X uses the CDNA 5.0 architecture with the MI450 256CU chip, built on a 2 nm TSMC process. The RX 7600 XT uses RDNA 3.0 with the Navi 33 chip (codename Hotpink Bonefish), built on a 6 nm TSMC process. The process node difference is substantial: 2 nm versus 6 nm, which contributes to a massive difference in transistor count and die size.

The MI455X integrates 320,000 million transistors on a 2990 mm² die, giving a transistor density of 107.0M per mm². The RX 7600 XT packs 13,300 million transistors on a 204 mm² die, with a density of 65.2M per mm². The MI455X has nearly 24 times the transistor count and a die area over 14 times larger. This is not a consumer graphics card; it is a data center compute module, reflected in its EAM Module slot width and lack of power connectors.

Memory configurations are equally divergent. The MI455X uses 432 GB of HBM4 on a 24,576-bit bus, yielding 23.3 TB/s bandwidth. The RX 7600 XT uses 16 GB of GDDR6 on a 128-bit bus, yielding 288.0 GB/s. The MI455X memory clock is 1900 MHz (7.6 Gbps effective), while the RX 7600 XT runs at 2250 MHz (18 Gbps effective). The bus width difference is the dominant factor in bandwidth, not clock speed.

Compute resources differ by an order of magnitude. The MI455X has 32,768 shading units, 1,024 texture mapping units, and 0 ROPs. The RX 7600 XT has 2,048 shading units, 128 TMUs, and 64 ROPs. The MI455X also has no ray tracing cores listed, while the RX 7600 XT includes 32 RT cores. The MI455X has no pixel rate (0 MPixel/s), while the RX 7600 XT outputs 176.3 GPixel/s. Texture rates are 2,457.6 GTexel/s versus 352.6 GTexel/s.

Clock behavior is inverted. The MI455X has a base clock of 1000 MHz and a boost of 2400 MHz, with no game clock. The RX 7600 XT has a base of 1980 MHz, a game clock of 2470 MHz, and a boost of 2755 MHz. Despite lower clocks, the MI455X achieves far higher throughput due to its massive parallel width. The MI455X has no API support (DirectX, OpenGL, Vulkan all N/A), confirming it is not a graphics rendering product. The RX 7600 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Power and connectivity differ drastically. The MI455X has a TDP of 2300 W and a suggested PSU of 2700 W, with no power connectors (likely integrated into the module interface). The RX 7600 XT has a TDP of 190 W, uses a single 8-pin connector, and a suggested PSU of 450 W. Bus interfaces are PCIe 6.0 x16 for the MI455X versus PCIe 4.0 x8 for the RX 7600 XT. Display outputs are absent on the MI455X, while the RX 7600 XT provides 1x HDMI 2.1a and 3x DisplayPort 2.1. Release dates differ: the MI455X is dated 2026-07-22, and the RX 7600 XT is 2024-01-23.

Where Each One Wins

Given the absence of head-to-head benchmarks, wins must be inferred from architectural capabilities and recorded scores.

The RX 7600 XT wins in any graphics rendering or display scenario. It has display outputs, a pixel rate of 176.3 GPixel/s, and full API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its benchmark scores are recorded across multiple tests: 3DMark Steel Nomad DX12 (2348), Geekbench OpenCL (92,426), Geekbench Vulkan (48,366), Passmark DirectX 10 (85), DirectX 11 (167), DirectX 12 (65), DirectX 9 (228), G2D (1030), G3D (17,132), and GPU Compute (8987). These scores place it at the 60th percentile among all GPUs, with an average benchmark score of 17,083. The nearest rival data shows it is within 0.9% of the NVIDIA Tesla M4 and 0.4% of the AMD Radeon HD 7970M, and 0.7% behind the RTX 3070. This indicates the RX 7600 XT is a mid-pack performer for its era, competitive with much older high-end parts but not a top-tier scorers.

The MI455X wins in raw compute throughput, memory capacity, and bandwidth. It has 157.3 TFLOPS FP32 and FP16 (1:1), 432 GB of memory, and 23.3 TB/s bandwidth. These are not benchmark scores, but they represent the intended workload: massive parallel computation for data center tasks, not rasterization. The MI455X also has a higher transistor density (107.0M per mm²) and a newer process node (2 nm), indicating more advanced manufacturing. Its TDP of 2300 W and suggested PSU of 2700 W confirm it is designed for sustained high-throughput compute, not interactive use.

The RX 7600 XT wins in power efficiency per unit of performance in graphics workloads, with a 190 W TDP versus 2300 W. The MI455X has no display outputs, making it unusable for standard desktop or gaming applications. The RX 7600 XT also wins in compatibility: it supports established APIs, has a production status of Active, and fits a dual-slot form factor with a standard 8-pin connector. The MI455X has no production status listed and uses an EAM Module form factor.

FAQ

Q: Why is there no direct benchmark comparison between the MI455X and RX 7600 XT?

A: The database contains no head-to-head benchmark entries for these two products. The MI455X has an average benchmark score of 0 and no recorded tests, while the RX 7600 XT has ten recorded benchmark scores. The MI455X does not support DirectX, OpenGL, or Vulkan, so it cannot run the same graphics tests.

Q: What does the RX 7600 XT’s percentile rank indicate?

A: The RX 7600 XT sits at the 60th percentile among all GPUs. Its average benchmark score is 17,083. Its nearest rival, the NVIDIA GeForce RTX 3070, scores 17,208, which is 0.7% higher, placing the RX 7600 XT slightly below that card in average performance.

Q: Can the MI455X output video to a display?

A: No. The MI455X has no display outputs and a pixel rate of 0 MPixel/s. It also has no DirectX, OpenGL, or Vulkan support. It is not a graphics rendering product.

Q: How do memory sizes compare between the two?

A: The MI455X has 432 GB of HBM4 memory on a 24,576-bit bus, yielding 23.3 TB/s bandwidth. The RX 7600 XT has 16 GB of GDDR6 on a 128-bit bus, yielding 288.0 GB/s. The MI455X offers over 26 times the memory capacity and roughly 80 times the bandwidth.

Q: What is the TDP difference?

A: The MI455X has a TDP of 2300 W and a suggested PSU of 2700 W. The RX 7600 XT has a TDP of 190 W and a suggested PSU of 450 W. The MI455X uses no power connectors, while the RX 7600 XT uses a single 8-pin connector.

Q: Which product is newer?

A: The MI455X has a release date of 2026-07-22. The RX 7600 XT has a release date of 2024-01-23, making the MI455X more recent by over two years.

The Verdict

The data supports a clear separation of use cases. The AMD Instinct MI455X is a data center compute module with no display output and no graphics API support. Its specifications are oriented toward massive parallel compute: 32,768 shading units, 157.3 TFLOPS FP32, 432 GB HBM4 memory, and 23.3 TB/s bandwidth. It has no recorded benchmark scores, so its performance cannot be quantified against consumer graphics cards. Its 50th percentile rank and 0 average score reflect the absence of test data, not a performance level.

The AMD Radeon RX 7600 XT is a consumer graphics card with full display and API support. It has measurable scores across 3DMark, Geekbench, and Passmark tests, averaging 17,083 and ranking at the 60th percentile. Its nearest rivals cluster within 0.9% in either direction, indicating it performs in a narrow band around older high-end cards like the GTX 690 and RTX 3070. It has a 16 GB memory buffer, 288.0 GB/s bandwidth, and 22.57 TFLOPS FP32, all suitable for standard gaming and workstation graphics tasks.

For any workload requiring display output, DirectX, OpenGL, or Vulkan, the RX 7600 XT is the only viable option. For raw compute throughput without graphics, the MI455X offers far higher numbers, but these are unverified by any benchmark in the database. The MI455X also demands a 2300 W TDP and a 2700 W suggested PSU, making deployment significantly more demanding than the RX 7600 XT’s 190 W TDP and 450 W PSU. The MI455X has no launch MSRP listed, while the RX 7600 XT has a launch MSRP of 329 USD.

The choice depends entirely on workload. If the task is rendering frames, the RX 7600 XT is the only candidate with recorded performance and functional outputs. If the task is compute-only, the MI455X has the specifications but no benchmark validation. The database cannot confirm the MI455X delivers on its theoretical throughput, so the RX 7600 XT remains the only product with verified performance data.