AMD Instinct MI455X vs Lisuan Tech LX MAX Comparison

Where Each One Wins

The recorded database profiles for the AMD Instinct MI455X and the Lisuan Tech LX MAX show no overlapping benchmark results. The head-to-head benchmark array is empty, and neither part has any individual benchmark scores listed. Consequently, the win count is zero for both entries. This means a direct application-level performance comparison cannot be established from the current data.

What can be established is the intended use-case split based on the physical and architectural characteristics. The AMD Instinct MI455X is an accelerator module with no display outputs, a memory capacity of 432 GB, and a thermal design power of 2300 W. It is designed for compute environments where rendering to a screen is irrelevant. The Lisuan Tech LX MAX is a dual-slot card with four DisplayPort 1.4a outputs, 12 GB of memory, and a 225 W power draw. It is built to drive displays and handle graphics workloads in a conventional workstation or consumer chassis.

The MI455X carries a PCIe 6.0 x16 interface and uses HBM4 memory across a 24576-bit bus. The LX MAX uses PCIe 4.0 x16 and GDDR6 on a 192-bit bus. These interface and memory choices align with different workloads. The MI455X targets data-center scale compute with massive memory bandwidth, while the LX MAX targets client-side graphics with standard connectivity and display support. The data does not support a statement about which part wins in any specific application, but it does indicate a clean separation of roles.

Architecture Differences

The two accelerators diverge at almost every architectural level. The AMD Instinct MI455X uses the MI450 256CU chip built on a 2 nm process at TSMC. The Lisuan Tech LX MAX uses the 7G106 chip on a 6 nm process, also at TSMC. The MI455X implements the CDNA 5.0 architecture, while the LX MAX uses an architecture labeled TrueGPU from the 7G100 generation.

The MI455X integrates 320,000 million transistors on a die size of 2990 mm². The LX MAX has unknown transistor count and die size. The transistor density for the MI455X is calculated at 107.0M per mm². No density figure exists for the LX MAX. The MI455X has 32768 shading units, 1024 texture mapping units, and zero ROPs. The LX MAX has 6144 shading units, 192 TMUs, and 96 ROPs. The ROP count difference is significant since the MI455X reports a pixel rate of 0 MPixel/s, while the LX MAX reports 192.0 GPixel/s.

Memory architecture differs completely. The MI455X uses 432 GB of HBM4 on a 24576-bit bus, achieving 23.3 TB/s bandwidth. The LX MAX uses 12 GB of GDDR6 on a 192-bit bus, achieving 432.0 GB/s. The MI455X memory clock is 1900 MHz with 7.6 Gbps effective data rate. The LX MAX memory clock is 2250 MHz with 18 Gbps effective. The MI455X has no display outputs. The LX MAX has four DisplayPort 1.4a outputs.

Compute throughput also differs. The MI455X delivers 157.3 TFLOPS for both FP32 and FP16 at a 1:1 ratio. The LX MAX delivers 24.58 TFLOPS for FP32 and 49.15 TFLOPS for FP16 at a 2:1 ratio. The texture rate for the MI455X is 2,457.6 GTexel/s, while the LX MAX is 384.0 GTexel/s. The MI455X has no API support listed for DirectX, OpenGL, or Vulkan. The LX MAX supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3.

Power delivery also separates the two. The MI455X has a 2300 W TDP, no power connectors (it uses an EAM Module slot), and requires a suggested 2700 W power supply. The LX MAX has a 225 W TDP, a single 16-pin connector, and a suggested 550 W power supply. The MI455X has no dimensions listed, while the LX MAX measures 248 mm in length, 118 mm in height, and 48 mm in width.

The Verdict

The data indicates that these two parts are not direct competitors. The AMD Instinct MI455X is a high-bandwidth compute accelerator for systems that do not need display output. It offers 432 GB of HBM4 memory, 23.3 TB/s of bandwidth, and 157.3 TFLOPS of FP32 throughput. It requires a 2300 W power envelope and a 2700 W suggested power supply. It has no graphics API support and no ROPs, which means it cannot rasterize images.

The Lisuan Tech LX MAX is a conventional graphics card. It has 12 GB of GDDR6, 192.0 GPixel/s pixel rate, and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3 support. It draws 225 W and fits in a dual-slot, 248 mm long form factor. It has four DisplayPort 1.4a outputs for direct monitor connection.

Based on the recorded data, the MI455X is appropriate for compute workloads that require enormous memory capacity and bandwidth, such as large model training or scientific simulation, where no display is needed. The LX MAX is appropriate for graphics rendering, display output, and applications that rely on standard graphics APIs. Neither part can substitute for the other in their respective roles. The MI455X cannot output video, and the LX MAX lacks the memory capacity and bandwidth for large-scale compute tasks. The selection between them depends entirely on whether the workload requires display output or massive memory throughput.

FAQ

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

A: The AMD Instinct MI455X has 432 GB of HBM4 memory. The Lisuan Tech LX MAX has 12 GB of GDDR6 memory.

Q: Which part supports display outputs?

A: The Lisuan Tech LX MAX has 4x DisplayPort 1.4a outputs. The AMD Instinct MI455X has no display outputs.

Q: What are the FP32 performance figures?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32. The Lisuan Tech LX MAX delivers 24.58 TFLOPS FP32.

Q: How do the memory bandwidths compare?

A: The AMD Instinct MI455X achieves 23.3 TB/s bandwidth over a 24576-bit bus. The Lisuan Tech LX MAX achieves 432.0 GB/s over a 192-bit bus.

Q: What power supply is suggested for each?

A: The AMD Instinct MI455X suggests a 2700 W power supply. The Lisuan Tech LX MAX suggests a 550 W power supply.

Q: Which part has graphics API support?

A: The Lisuan Tech LX MAX supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The AMD Instinct MI455X has no listed API support.

Head-to-Head Benchmarks

The head-to-head benchmark list is empty for both parts. There are no recorded scores to compare. However, the specification data allows for a direct comparison of theoretical throughput limits.

The largest gap in raw compute is FP32 throughput. The AMD Instinct MI455X delivers 157.3 TFLOPS, which is 6.4 times the 24.58 TFLOPS of the Lisuan Tech LX MAX. In FP16, the MI455X delivers 157.3 TFLOPS at a 1:1 ratio, while the LX MAX delivers 49.15 TFLOPS at a 2:1 ratio. The MI455X leads FP16 by a factor of 3.2.

Memory bandwidth shows an even larger disparity. The MI455X has 23.3 TB/s, which is roughly 54 times the 432.0 GB/s of the LX MAX. This bandwidth advantage comes from the 24576-bit bus and HBM4 memory, versus the 192-bit bus and GDDR6 on the LX MAX. Texture rate also favors the MI455X at 2,457.6 GTexel/s versus 384.0 GTexel/s, a 6.4 times difference.

The Lisuan Tech LX MAX wins in pixel throughput. It has a pixel rate of 192.0 GPixel/s due to its 96 ROPs. The MI455X has 0 ROPs and a pixel rate of 0 MPixel/s. This means the LX MAX can rasterize frames while the MI455X cannot. The LX MAX also wins in power efficiency per the recorded data, drawing 225 W versus 2300 W, though no efficiency score is provided. The LX MAX also has a smaller physical footprint at 248 mm length versus no listed dimensions for the MI455X.

The MI455X uses a 2 nm process node, while the LX MAX uses 6 nm. The MI455X has 320,000 million transistors on a 2990 mm² die. The LX MAX transistor count is unknown. The MI455X has 32768 shading units versus 6144 on the LX MAX. The MI455X has 1024 TMUs versus 192 on the LX MAX. These specification gaps indicate that the MI455X is designed for sustained compute throughput, while the LX MAX is designed for balanced graphics and compute within a 225 W envelope.

Specification Differences

The two parts differ in nearly every recorded specification field.

• Chip: AMD Instinct MI455X uses MI450 256CU. Lisuan Tech LX MAX uses 7G106.
• Architecture: MI455X is CDNA 5.0. LX MAX is TrueGPU.
• Generation: MI455X is Instinct (MIx). LX MAX is 7G100.
• Process Node: MI455X is 2 nm. LX MAX is 6 nm. Both use TSMC.
• Transistors: MI455X has 320,000 million. LX MAX has unknown.
• Die Size: MI455X is 2990 mm². LX MAX has unknown.
• Transistor Density: MI455X is 107.0M / mm². LX MAX has none listed.
• Base Clock: MI455X is 1000 MHz. LX MAX has no base clock listed.
• Boost Clock: MI455X is 2400 MHz. LX MAX has no boost clock listed.
• Memory Clock: MI455X is 1900 MHz with 7.6 Gbps effective. LX MAX is 2250 MHz with 18 Gbps effective.
• Memory Size: MI455X is 432 GB. LX MAX is 12 GB.
• Memory Type: MI455X is HBM4. LX MAX is GDDR6.
• Memory Bus Width: MI455X is 24576 bit. LX MAX is 192 bit.
• Memory Bandwidth: MI455X is 23.3 TB/s. LX MAX is 432.0 GB/s.
• Shading Units: MI455X has 32768. LX MAX has 6144.
• TMUs: MI455X has 1024. LX MAX has 192.
• ROPs: MI455X has 0. LX MAX has 96.
• Pixel Rate: MI455X is 0 MPixel/s. LX MAX is 192.0 GPixel/s.
• Texture Rate: MI455X is 2,457.6 GTexel/s. LX MAX is 384.0 GTexel/s.
• FP32: MI455X is 157.3 TFLOPS. LX MAX is 24.58 TFLOPS.
• FP16: MI455X is 157.3 TFLOPS (1:1). LX MAX is 49.15 TFLOPS (2:1).
• TDP: MI455X is 2300 W. LX MAX is 225 W.
• Slot Width: MI455X is EAM Module. LX MAX is Dual-slot.
• Power Connectors: MI455X has none. LX MAX has 1x 16-pin.
• Suggested PSU: MI455X is 2700 W. LX MAX is 550 W.
• Bus Interface: MI455X is PCIe 6.0 x16. LX MAX is PCIe 4.0 x16.
• Display Outputs: MI455X has no outputs. LX MAX has 4x DisplayPort 1.4a.
• DirectX: MI455X is N/A. LX MAX is 12 Ultimate (12_2).
• OpenGL: MI455X is N/A. LX MAX is 4.6.
• Vulkan: MI455X is N/A. LX MAX is 1.3.
• Dimensions: MI455X has none listed. LX MAX is 248 mm length, 118 mm height, 48 mm width.
• Production Status: MI455X has none listed. LX MAX is Active.
• Release Date: MI455X is 2026-07-22. LX MAX is 2026-03-16.
• Predecessor: MI455X is Radeon Instinct. LX MAX has none listed.
• Launch MSRP: Neither part has a launch MSRP recorded.