AMD Radeon 840M vs Lisuan Tech LX PRO Comparison

FAQ

Q: What are the core architectural differences between the AMD Radeon 840M and the Lisuan Tech LX PRO?

A: The AMD Radeon 840M uses the RDNA 3.5 architecture on a 4 nm TSMC process, while the Lisuan Tech LX PRO uses the TrueGPU architecture on a 6 nm TSMC process. The Radeon 840M is an integrated graphics processor (IGP) from the Navi III IGP generation, whereas the LX PRO is a discrete, dual-slot add-in card.

Q: How do their memory subsystems compare?

A: The Radeon 840M relies on System Shared memory with bandwidth described as System Dependent. The LX PRO features 24 GB of dedicated GDDR6 memory on a 192-bit bus, delivering 432.0 GB/s of bandwidth.

Q: Which GPU has a higher pixel throughput?

A: The Lisuan Tech LX PRO has a pixel rate of 192.0 GPixel/s, which is over 8 times higher than the AMD Radeon 840M's 23.20 GPixel/s.

Q: What are the power requirements for each card?

A: The Radeon 840M has a 15 W TDP and uses no power connectors, consistent with its IGP design. The LX PRO has a 225 W TDP, uses a single 16-pin power connector, and requires a 550 W suggested power supply.

Q: Do both GPUs support the same API feature levels?

A: Both support DirectX 12 Ultimate (12_2) and OpenGL 4.6. The Radeon 840M supports Vulkan 1.4, while the LX PRO supports Vulkan 1.3.

Q: What are the physical dimensions of the LX PRO?

A: The LX PRO measures 248 mm in length, 118 mm in height, and 48 mm in width, occupying a dual-slot form factor. The Radeon 840M is an IGP with no specified dimensions.

Architecture Differences

The two GPUs represent fundamentally different design philosophies. The AMD Radeon 840M is a 4 nm TSMC part built on the RDNA 3.5 architecture, belonging to the Navi III IGP generation with the Krackan Point chip. It is designed for integration into a portable device, as indicated by its IGP slot width, lack of power connectors, and "Portable Device Dependent" display outputs. Its transistor count and die size are listed as unknown in the database.

The Lisuan Tech LX PRO uses the TrueGPU architecture on a 6 nm TSMC process, with the 7G105 chip from the 7G100 generation. This is a discrete card with a dual-slot design, measuring 248 mm by 118 mm by 48 mm. It uses a 16-pin power connector and routes display output through 4x DisplayPort 1.4a connections.

The compute resource gap is substantial. The Radeon 840M has 256 shading units, 16 texture mapping units, and 8 ROPs. It also includes 4 ray tracing cores. The LX PRO has 6144 shading units, 192 TMUs, and 96 ROPs. The database does not record ray tracing core counts for the LX PRO.

Clock behavior differs sharply. The Radeon 840M has a base clock of 400 MHz and a boost clock of 2900 MHz. The LX PRO has no recorded base or boost clock values, but its memory operates at 2250 MHz with 18 Gbps effective speed. The Radeon 840M's memory clock is System Shared.

FP32 and FP16 throughput values illustrate the scale difference. The Radeon 840M delivers 1,484.8 GFLOPS in both FP32 and FP16, indicating a 1:1 ratio. The LX PRO delivers 24.58 TFLOPS in FP32 and 49.15 TFLOPS in FP16, a 2:1 ratio. The LX PRO's FP32 figure is more than 16 times that of the Radeon 840M.

The bus interface also differs: the Radeon 840M uses PCIe 4.0 x8, while the LX PRO uses PCIe 4.0 x16. Both cards are currently marked Active in production status. The Radeon 840M was released on 2025-02-28, and the LX PRO on 2026-03-16. The Radeon 840M lists the Navi II IGP as its predecessor.

The Verdict

The recorded data indicates two products aimed at different segments entirely. The AMD Radeon 840M is an integrated solution with a 15 W TDP, designed for portable devices where power draw and physical footprint are constrained. Its 256 shading units and System Shared memory place it in a class of hardware intended for basic graphical output and light workloads within a mobile or compact system.

The Lisuan Tech LX PRO is a high-displacement discrete card. Its 225 W TDP, dual-slot cooler, 24 GB GDDR6 memory, and 432.0 GB/s bandwidth position it as a part for systems that can supply a 550 W power supply and accommodate a 248 mm card. The LX PRO's 6144 shading units and 24.58 TFLOPS FP32 performance put it in a different performance category altogether.

Benchmark data from the database shows both products at the 50th percentile versus all GPUs, with an average benchmark score of 0 for each. There are no recorded head-to-head benchmark victories for either product. Without recorded benchmark scores or nearest rival data, the analysis rests on the architectural specifications.

Users with a portable device that relies on an IGP will have the Radeon 840M as an integrated option. Users building or upgrading a desktop with a dedicated power supply and a need for high memory capacity and bandwidth would select the LX PRO based on its hardware specifications. The data does not support a different conclusion: these are not competing products in the same market segment.

Specification Differences

The following fields differ between the AMD Radeon 840M and the Lisuan Tech LX PRO:

• Architecture: RDNA 3.5 vs TrueGPU
• Process Node: 4 nm vs 6 nm
• Shading Units: 256 vs 6144
• Texture Mapping Units: 16 vs 192
• ROP Units: 8 vs 96
• Ray Tracing Cores: 4 vs null (not recorded)
• Pixel Rate: 23.20 GPixel/s vs 192.0 GPixel/s
• Texture Rate: 46.40 GTexel/s vs 384.0 GTexel/s
• FP32 Performance: 1,484.8 GFLOPS vs 24.58 TFLOPS
• FP16 Performance: 1,484.8 GFLOPS (1:1) vs 49.15 TFLOPS (2:1)
• TDP: 15 W vs 225 W
• Slot Width: IGP vs Dual-slot
• Power Connectors: None vs 1x 16-pin
• Suggested PSU: null vs 550 W
• Bus Interface: PCIe 4.0 x8 vs PCIe 4.0 x16
• Display Outputs: Portable Device Dependent vs 4x DisplayPort 1.4a
• Vulkan Version: 1.4 vs 1.3
• Memory Size: System Shared vs 24 GB
• Memory Type: System Shared vs GDDR6
• Memory Bus Width: System Shared vs 192 bit
• Memory Bandwidth: System Dependent vs 432.0 GB/s
• Release Date: 2025-02-28 vs 2026-03-16
• Dimensions: null vs 248 mm length, 118 mm height, 48 mm width
• Chip: Krackan Point vs 7G105
• Generation: Navi III IGP (Strix Point Mobile) vs 7G100

Head-to-Head Benchmarks

The database contains no recorded head-to-head benchmark results for these two products, and neither item has an average benchmark score above 0. Both are listed at the 50th percentile versus all GPUs. The wins counters for both items are 0. Therefore, a numerical comparison of benchmark outcomes is not possible from the recorded data.

The specification sheet, however, provides a basis for comparison. The Lisuan Tech LX PRO shows overwhelming advantages in raw throughput metrics. Its FP32 performance of 24.58 TFLOPS is more than 16 times the Radeon 840M's 1,484.8 GFLOPS. The LX PRO's pixel rate of 192.0 GPixel/s exceeds the Radeon 840M's 23.20 GPixel/s by a factor of roughly 8.3. The texture rate of 384.0 GTexel/s on the LX PRO is more than 8 times the 46.40 GTexel/s of the Radeon 840M.

Memory bandwidth presents a similarly lopsided picture. The LX PRO delivers 432.0 GB/s from its 192-bit GDDR6 configuration, while the Radeon 840M depends on System Shared memory with bandwidth that is System Dependent. The 24 GB memory capacity of the LX PRO is a fixed quantity, whereas the Radeon 840M has no dedicated video memory.

The Radeon 840M does have a few relative advantages. Its 4 nm process node is smaller than the LX PRO's 6 nm node. It also supports Vulkan 1.4, a newer API version than the LX PRO's Vulkan 1.3. The Radeon 840M's 15 W TDP is dramatically lower than the LX PRO's 225 W TDP, and it requires no power connectors or external power supply suggestion.

The Radeon 840M includes 4 ray tracing cores, while the LX PRO has no recorded ray tracing core count. Both GPUs support DirectX 12 Ultimate (12_2) and OpenGL 4.6, indicating parity in those API feature levels.

Given the absence of benchmark scores, the performance relationship between these two products must be inferred from the architectural data. The LX PRO's shading unit count of 6144 versus 256 for the Radeon 840M suggests a 24-fold difference in parallel compute capacity, before considering clock speeds. The LX PRO's boost clock is not recorded, so a precise aggregate calculation cannot be made.

The 24.58 TFLOPS FP32 figure for the LX PRO aligns with high-end discrete graphics performance, while the 1,484.8 GFLOPS of the Radeon 840M aligns with integrated graphics. The data confirms that the LX PRO is designed for compute-heavy and high-resolution workloads, while the Radeon 840M targets power-constrained portable systems.