AMD Instinct MI355X vs AMD Radeon RX 7600M XT Comparison

FAQ

Q: What are the core architectural differences between the AMD Instinct MI355X and the AMD Radeon RX 7600M XT?

A: The MI355X uses the CDNA 4.0 architecture on a 3 nm process with the MI350 256CU chip, while the RX 7600M XT uses the RDNA 3.0 architecture on a 6 nm process with the Navi 33 chip. The MI355X has 16,384 shading units, 1,024 TMUs, and no ROPs, whereas the RX 7600M XT has 2,048 shading units, 128 TMUs, and 64 ROPs.

Q: How do the memory subsystems differ between these two GPUs?

A: The MI355X features 288 GB of HBM3e memory on an 8192-bit bus with 8.19 TB/s bandwidth, while the RX 7600M XT has 8 GB of GDDR6 memory on a 128-bit bus with 288.0 GB/s bandwidth. The MI355X memory clock is 2000 MHz (8 Gbps effective), and the RX 7600M XT memory clock is 2250 MHz (18 Gbps effective).

Q: What are the FP32 compute figures for each GPU?

A: The MI355X delivers 78.64 TFLOPS of FP32 performance, while the RX 7600M XT delivers 20.23 TFLOPS. In FP16, the MI355X also delivers 78.64 TFLOPS (1:1 ratio), whereas the RX 7600M XT achieves 40.45 TFLOPS (2:1 ratio).

Q: Which GPU has a higher transistor count and larger die size?

A: The MI355X has 185,000 million transistors on a 2380 mm² die with a density of 77.7M transistors per mm². The RX 7600M XT has 13,300 million transistors on a 204 mm² die with a density of 65.2M transistors per mm².

Q: What are the power requirements for each card?

A: The MI355X has a TDP of 1400 W and a suggested PSU rating of 1800 W, using an OAM Module slot width with no power connectors. The RX 7600M XT has a TDP of 120 W, an IGP slot width, no power connectors, and no suggested PSU rating is listed.

Q: What benchmark data exists for the RX 7600M XT?

A: The RX 7600M XT has an average benchmark score of 12,710, placing it in the 52nd percentile among all GPUs. Its highest single benchmark score is 74,869 in Geekbench OpenCL, followed by 27,793 in Geekbench Vulkan and 13,907 in Passmark G3D. The MI355X has no recorded benchmark scores in the database.

Architecture Differences

The AMD Instinct MI355X and the AMD Radeon RX 7600M XT represent two fundamentally divergent design philosophies within AMD’s product stack. The MI355X is built on the CDNA 4.0 architecture, which is optimized for compute-intensive workloads such as AI training and scientific simulation. It uses the MI350 256CU chip manufactured on a 3 nm process at TSMC. This process node allows for an extraordinary transistor count of 185,000 million, packed onto a die size of 2380 mm², yielding a transistor density of 77.7M transistors per mm².

The RX 7600M XT, by contrast, uses the RDNA 3.0 architecture, which is designed for graphics rendering and gaming. It is based on the Navi 33 chip, codenamed Hotpink Bonefish, and is manufactured on a 6 nm process at TSMC. The transistor count is 13,300 million on a 204 mm² die, giving a density of 65.2M transistors per mm². The MI355X therefore has roughly 14 times the transistor count and about 11.7 times the die area of the RX 7600M XT.

The shading unit count differs dramatically: the MI355X has 16,384 shading units and 1,024 texture mapping units, but no ROPs. The RX 7600M XT has 2,048 shading units, 128 TMUs, and 64 ROPs. This means the MI355X has no pixel output capability, which aligns with its role as a compute accelerator with no display outputs. The RX 7600M XT, on the other hand, has full graphics pipeline support with 32 ray tracing cores and a pixel rate of 158.0 GPixel/s.

Memory architecture also separates the two. The MI355X uses HBM3e with 288 GB capacity, an 8192-bit bus, and 8.19 TB/s of bandwidth. The RX 7600M XT uses GDDR6 with 8 GB capacity, a 128-bit bus, and 288.0 GB/s bandwidth. The MI355X memory bandwidth is about 28 times higher than the RX 7600M XT, reflecting the compute-oriented design requirement for massive data movement.

The MI355X supports PCIe 5.0 x16, while the RX 7600M XT uses PCIe 4.0 x16. The MI355X has no display outputs, whereas the RX 7600M XT’s outputs are described as portable device dependent. API support also differs: the RX 7600M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI355X lists N/A for DirectX, OpenGL, and Vulkan.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between the AMD Instinct MI355X and the AMD Radeon RX 7600M XT. The head-to-head benchmark list is empty for both items, and the wins count is zero for each. Consequently, a direct performance comparison must rely on the available specification data and the benchmark results recorded for the RX 7600M XT alone.

The MI355X has no recorded benchmark scores in the database. Its percentile rank is 50, and its average benchmark score is 0. This absence of benchmark data means that the MI355X’s performance can only be inferred from its raw specifications rather than from measured outcomes.

The RX 7600M XT, however, has a substantial set of benchmark results. Its average benchmark score is 12,710, which places it in the 52nd percentile among all GPUs. In the nearest rivals comparison, the RX 7600M XT sits close to several NVIDIA and AMD parts. The NVIDIA GeForce GTX 670 has an average score of 12,773, which is 0.5% higher than the RX 7600M XT. The NVIDIA Tesla K20Xm scores 12,625, which is 0.7% lower. The NVIDIA GeForce GTX 590 scores 12,830, which is 0.9% higher, and the AMD Radeon Pro 455 scores 12,831, also 0.9% higher.

Looking at individual benchmark tests for the RX 7600M XT, the strongest result comes from Geekbench OpenCL with a score of 74,869. The Geekbench Vulkan score is 27,793. In Passmark tests, the G3D score is 13,907, the G2D score is 894, and the GPU Compute score is 7,140. The DirectX tests show lower numbers: DirectX 9 scores 175, DirectX 11 scores 137, DirectX 10 scores 76, and DirectX 12 scores 58. The 3DMark Steel Nomad DX12 test yields a score of 2,048.

Given the absence of MI355X benchmark data, the specification comparison indicates that the MI355X should vastly outperform the RX 7600M XT in compute throughput. The MI355X’s FP32 figure of 78.64 TFLOPS is approximately 3.9 times the RX 7600M XT’s 20.23 TFLOPS. Texture rate also favors the MI355X at 2,457.6 GTexel/s versus 316.0 GTexel/s, a factor of about 7.8. The MI355X’s memory bandwidth advantage is similarly large, as noted above.

Specification Differences

The two GPUs differ across nearly every major specification category. The most significant differences are summarized below.

Process node: The MI355X uses a 3 nm process, while the RX 7600M XT uses a 6 nm process. Both are manufactured by TSMC.

Transistors: The MI355X has 185,000 million transistors; the RX 7600M XT has 13,300 million.

Die size: The MI355X has a die size of 2380 mm²; the RX 7600M XT has 204 mm².

Transistor density: The MI355X achieves 77.7M transistors per mm²; the RX 7600M XT achieves 65.2M per mm².

Base clock: The MI355X base clock is 1000 MHz; the RX 7600M XT base clock is 1280 MHz.

Boost clock: The MI355X boost clock is 2400 MHz; the RX 7600M XT boost clock is 2469 MHz. The RX 7600M XT also has a game clock of 2023 MHz, which is not listed for the MI355X.

Memory clock: The MI355X memory clock is 2000 MHz (8 Gbps effective); the RX 7600M XT memory clock is 2250 MHz (18 Gbps effective).

Memory size: The MI355X has 288 GB; the RX 7600M XT has 8 GB.

Memory type: The MI355X uses HBM3e; the RX 7600M XT uses GDDR6.

Memory bus width: The MI355X has an 8192-bit bus; the RX 7600M XT has a 128-bit bus.

Memory bandwidth: The MI355X delivers 8.19 TB/s; the RX 7600M XT delivers 288.0 GB/s.

Shading units: The MI355X has 16,384; the RX 7600M XT has 2,048.

TMUs: The MI355X has 1,024; the RX 7600M XT has 128.

ROPs: The MI355X has 0; the RX 7600M XT has 64.

Ray tracing cores: The MI355X has none listed; the RX 7600M XT has 32.

Pixel rate: The MI355X is 0 MPixel/s; the RX 7600M XT is 158.0 GPixel/s.

Texture rate: The MI355X is 2,457.6 GTexel/s; the RX 7600M XT is 316.0 GTexel/s.

FP32 performance: The MI355X is 78.64 TFLOPS; the RX 7600M XT is 20.23 TFLOPS.

FP16 performance: The MI355X is 78.64 TFLOPS (1:1); the RX 7600M XT is 40.45 TFLOPS (2:1).

TDP: The MI355X is 1400 W; the RX 7600M XT is 120 W.

Slot width: The MI355X is an OAM Module; the RX 7600M XT is an IGP.

Suggested PSU: The MI355X requires an 1800 W PSU; the RX 7600M XT has no suggested PSU listed.

Bus interface: The MI355X uses PCIe 5.0 x16; the RX 7600M XT uses PCIe 4.0 x16.

Display outputs: The MI355X has no outputs; the RX 7600M XT has portable device dependent outputs.

API support: The MI355X lists N/A for DirectX, OpenGL, and Vulkan; the RX 7600M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release date: The MI355X was released on 2025-06-11; the RX 7600M XT on 2023-01-03.

Production status: The MI355X has no production status listed; the RX 7600M XT is marked as Active.

Dimensions: The MI355X measures 102 mm in length and 165 mm in width; the RX 7600M XT has no dimensions listed.

Where Each One Wins

The AMD Instinct MI355X wins decisively in raw compute throughput. Its FP32 performance of 78.64 TFLOPS is nearly four times that of the RX 7600M XT, and its FP16 performance of 78.64 TFLOPS is about 1.9 times the RX 7600M XT’s 40.45 TFLOPS. The MI355X’s texture rate of 2,457.6 GTexel/s is roughly 7.8 times the RX 7600M XT’s 316.0 GTexel/s. Memory bandwidth is another overwhelming advantage: 8.19 TB/s versus 288.0 GB/s, a difference of about 28 times. The MI355X also has a much larger memory pool at 288 GB, which is essential for large model training and inference workloads. Its PCIe 5.0 interface provides double the bandwidth of the RX 7600M XT’s PCIe 4.0.

The AMD Radeon RX 7600M XT wins in areas that matter for graphics rendering and client-side workloads. It has 64 ROPs and a pixel rate of 158.0 GPixel/s, while the MI355X has 0 ROPs and a pixel rate of 0 MPixel/s. The RX 7600M XT has 32 ray tracing cores, which the MI355X lacks entirely. The RX 7600M XT supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the MI355X has no API support for any of these. The RX 7600M XT has a lower base clock of 1280 MHz versus 1000 MHz, and a slightly higher boost clock of 2469 MHz versus 2400 MHz. Its memory clock is also higher at 2250 MHz versus 2000 MHz. The RX 7600M XT’s TDP of 120 W is a fraction of the MI355X’s 1400 W, making it suitable for portable devices with limited power budgets.

The RX 7600M XT’s benchmark data shows it performing in the 52nd percentile among all GPUs, with an average score of 12,710. Its nearest rivals are the NVIDIA GeForce GTX 670, NVIDIA Tesla K20Xm, NVIDIA GeForce GTX 590, and AMD Radeon Pro 455, all within a 1% score range. This indicates that the RX 7600M XT is a mid-range performer in the overall GPU landscape. The MI355X has no benchmark data to confirm its standing, but the specification sheet points to a purpose-built compute accelerator rather than a general-purpose graphics card.

The Verdict

The data indicates that the AMD Instinct MI355X and the AMD Radeon RX 7600M XT serve entirely different purposes. The MI355X is a compute accelerator with no display outputs, no graphics API support, and no pixel rendering capability. Its massive memory capacity, extreme bandwidth, and high FP32/FP16 throughput define it as a server-class part for data center deployments. The RX 7600M XT is a mobile graphics processor with full DirectX 12 Ultimate, OpenGL, and Vulkan support, complete with ray tracing cores and ROPs, designed to render graphics on portable devices.

For compute workloads such as large-scale AI training, scientific simulation, or high-performance computing, the MI355X is the clear choice based on specifications. The 288 GB HBM3e memory pool and 8.19 TB/s bandwidth are unmatched by the RX 7600M XT’s 8 GB GDDR6 and 288.0 GB/s. The FP32 compute advantage of 78.64 TFLOPS versus 20.23 TFLOPS provides a substantial margin for parallel processing tasks.

For graphics rendering, gaming, or any client-side application that requires visual output, the RX 7600M XT is the only viable option between the two. The MI355X cannot output video, has no ROPs, and lacks the graphics API stack. The RX 7600M XT’s benchmark scores, including a 3DMark Steel Nomad DX12 score of 2,048 and a Passmark G3D score of 13,907, demonstrate measurable graphics performance, while the MI355X has no recorded graphics benchmarks.

The power envelope further differentiates these products. The MI355X requires a 1400 W TDP and an 1800 W suggested PSU, making it unsuitable for mobile or consumer desktop environments. The RX 7600M XT operates at 120 W with no suggested PSU requirement, fitting into the IGP slot width for portable devices.

The release dates also reflect their distinct market positions. The MI355X launched on 2025-06-11, while the RX 7600M XT launched on 2023-01-03. The MI355X’s predecessor is Radeon Instinct, and the RX 7600M XT’s predecessor is Polaris Mobile, confirming their divergent product lineages.

In summary, the recorded data shows two non-overlapping products. The MI355X wins exclusively on compute capacity, memory resources, and interface bandwidth. The RX 7600M XT wins exclusively on graphics features, rendering capability, API compatibility, and power efficiency. Neither card can substitute for the other in its respective domain. The selection between them depends entirely on whether the workload is compute-centric or graphics-centric.