AMD Instinct MI455X vs Lisuan Tech LX 7G100 Comparison

The Verdict

The AMD Instinct MI455X and Lisuan Tech LX 7G100 occupy completely different segments of the GPU market, and the data makes that clear from the first glance at their specifications. The MI455X is a compute-oriented accelerator designed for massive parallel workloads, while the LX 7G100 is a conventional graphics card with display outputs and full API support.

The MI455X is the choice for anyone running heavy compute tasks that can utilize its enormous memory capacity and raw throughput. Its 432 GB of HBM4 memory, 23.3 TB/s bandwidth, and 157.3 TFLOPS FP32 performance place it in an entirely different performance class. This card has no display outputs, meaning it is strictly for compute environments such as AI training, scientific simulation, or large-scale data processing.

The LX 7G100 is the pick for traditional graphics workloads. It offers 4x DisplayPort 1.4a outputs, DirectX 12 Ultimate support, and a 12 GB GDDR6 memory buffer. Its 96 ROPs enable 192.0 GPixel/s pixel throughput, making it suitable for rendering, gaming, or any task requiring actual video output. With a 225 W TDP and a single 8-pin power connector, it fits into conventional workstation or desktop builds.

The performance gap is staggering. The MI455X delivers 6.4 times the FP32 throughput of the LX 7G100, and its memory bandwidth is 53.9 times higher. The MI455X also uses a 2 nm TSMC process node versus the 6 nm node of the LX 7G100. However, none of those advantages matter if the target workload requires a display output or standard graphics API support, both of which the MI455X completely lacks.

FAQ

Q: Can the AMD Instinct MI455X output video to a monitor?

A: No. The MI455X lists "No outputs" as its display configuration, and it has zero pixel rate (0 MPixel/s). It is not designed for visual output of any kind.

Q: What is the memory capacity difference between the two cards?

A: The MI455X has 432 GB of HBM4 memory, while the LX 7G100 has 12 GB of GDDR6 memory. The MI455X memory bus is 24576 bit wide, compared to 192 bit for the LX 7G100.

Q: Which card supports standard graphics APIs?

A: Only the LX 7G100. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The MI455X lists N/A for DirectX, OpenGL, and Vulkan.

Q: What are the power requirements for each card?

A: The MI455X has a 2300 W TDP with a suggested PSU of 2700 W and no power connectors. The LX 7G100 has a 225 W TDP, uses a single 8-pin connector, and requires a 550 W suggested PSU.

Q: How do the FP32 performance figures compare?

A: The MI455X delivers 157.3 TFLOPS FP32, while the LX 7G100 delivers 24.58 TFLOPS. The MI455X is roughly 6.4 times faster in this metric.

Q: What is the release timing for these products?

A: The LX 7G100 was released on 2026-06-17, and the MI455X followed on 2026-07-22. The LX 7G100 has an "Active" production status, while the MI455X has no production status listed.

Architecture Differences

The MI455X uses AMD's CDNA 5.0 architecture with a chip labeled MI450 256CU. This architecture is designed for compute acceleration, evidenced by the complete absence of display outputs and graphics API support. The chip contains 320,000 million transistors on a 2990 mm² die, fabricated on TSMC's 2 nm process. This yields a transistor density of 107.0M per mm². The architecture includes 32768 shading units and 1024 TMUs, but has zero ROPs, confirming it has no rasterization pipeline.

The LX 7G100 uses the Lisuan Tech TrueGPU architecture with a 7G106 chip. It is fabricated on TSMC's 6 nm process, and while its transistor count and die size are unknown, the architectural design is clearly a conventional graphics processor. It includes 6144 shading units, 192 TMUs, and 96 ROPs. The presence of ROPs and display outputs confirms this is a rasterization-capable GPU. The TrueGPU architecture supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3, making it suitable for standard graphics workloads.

The MI455X is part of the Instinct (MIx) generation from AMD, with a predecessor of Radeon Instinct. The LX 7G100 belongs to the 7G100 generation with no listed predecessor. The MI455X uses PCIe 6.0 x16, while the LX 7G100 uses PCIe 4.0 x16, representing a difference of two bus generations.

Specification Differences

The memory subsystems are the most dramatic difference. The MI455X has 432 GB of HBM4 memory at 1900 MHz (7.6 Gbps effective) on a 24576 bit bus, producing 23.3 TB/s bandwidth. The LX 7G100 has 12 GB of GDDR6 at 2250 MHz (18 Gbps effective) on a 192 bit bus, producing 432.0 GB/s bandwidth. The MI455X has 53.9 times the memory bandwidth of its rival.

Compute resources differ substantially. The MI455X has 32768 shading units versus 6144 on the LX 7G100, and 1024 TMUs versus 192. The MI455X has zero ROPs, while the LX 7G100 has 96. Pixel rate is 0 MPixel/s for the MI455X and 192.0 GPixel/s for the LX 7G100. Texture rate is 2,457.6 GTexel/s for the MI455X versus 384.0 GTexel/s for the LX 7G100.

FP32 performance is 157.3 TFLOPS on the MI455X versus 24.58 TFLOPS on the LX 7G100. FP16 performance is 157.3 TFLOPS (1:1) on the MI455X versus 49.15 TFLOPS (2:1) on the LX 7G100. The MI455X maintains a 1:1 ratio between FP16 and FP32, while the LX 7G100 offers 2:1 FP16 throughput.

Power and physical specifications also diverge sharply. The MI455X has a 2300 W TDP with no power connectors and a 2700 W suggested PSU. It is an EAM Module form factor. The LX 7G100 has a 225 W TDP with one 8-pin connector and a 550 W suggested PSU, in a dual-slot design measuring 294 mm long, 120 mm high, and 49 mm wide. The MI455X has no listed dimensions, no display outputs, and no API support. The LX 7G100 has four DisplayPort 1.4a outputs and full API support.

Head-to-Head Benchmarks

Direct benchmark comparisons are limited because the MI455X has no benchmark scores recorded and no nearest rivals listed. The LX 7G100 also has no benchmark scores or nearest rivals. Both cards share a percentile ranking of 50 among all GPUs in the database, and both have an average benchmark score of zero.

The specification data provides the basis for performance comparison. In FP32 compute, the MI455X achieves 157.3 TFLOPS, which is 6.4 times the 24.58 TFLOPS of the LX 7G100. In FP16 compute, the MI455X achieves 157.3 TFLOPS, which is 3.2 times the 49.15 TFLOPS of the LX 7G100. The MI455X texture rate of 2,457.6 GTexel/s is 6.4 times the 384.0 GTexel/s of the LX 7G100.

The LX 7G100 wins decisively in rasterization metrics. Its 192.0 GPixel/s pixel rate compares to zero on the MI455X. The LX 7G100 has 96 ROPs, while the MI455X has none. Memory clock speeds favor the LX 7G100 at 2250 MHz (18 Gbps effective) versus 1900 MHz (7.6 Gbps effective) on the MI455X, though the MI455X compensates with a vastly wider bus.

Memory bandwidth is the single largest gap in the data. The MI455X delivers 23.3 TB/s from its 24576 bit HBM4 interface, which is 53.9 times the 432.0 GB/s of the LX 7G100. The MI455X also has 36 times the memory capacity at 432 GB versus 12 GB.

Where Each One Wins

The MI455X wins in every compute-heavy category. Its FP32 and FP16 throughput are multiples of the LX 7G100's figures. Its memory capacity and bandwidth are orders of magnitude higher, supporting far larger datasets and memory-bound workloads. The 2 nm process node and PCIe 6.0 interface represent newer technology generations. The MI455X is the clear choice for AI model training, scientific computing, and any workload that needs massive parallel compute and enormous memory capacity.

The LX 7G100 wins in every graphics-oriented category. It has working ROPs, pixel output, display connectivity, and full support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3. Its 12 GB GDDR6 memory is conventional and compatible with standard graphics workloads. The 225 W TDP and single 8-pin power connector allow installation in standard systems with a 550 W PSU. Its dual-slot form factor with listed dimensions (294 mm by 120 mm by 49 mm) fits typical desktop chassis.

The LX 7G100 also wins on power efficiency in practical terms. Its 225 W TDP is dramatically lower than the 2300 W TDP of the MI455X, and its 550 W suggested PSU is far more attainable than the 2700 W requirement of the MI455X. The LX 7G100 is an active production product, while the MI455X has no production status recorded.

The choice between these two cards depends entirely on the workload. For compute without display requirements, the MI455X is unmatched in the recorded data. For any task requiring video output or standard graphics APIs, the LX 7G100 is the only option, as the MI455X cannot perform those functions at all.