AMD Radeon 840M vs Lisuan Tech LX ULTRA Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark results for the AMD Radeon 840M and the Lisuan Tech LX ULTRA. Both entries report an average benchmark score of 0 and a percentile rank of 50 among all GPUs in the database. The wins count for each product is also 0, indicating that no comparative testing data has been captured for this pairing.

The absence of measured scores means the database cannot confirm any performance advantage for either product through direct comparison. The AMD Radeon 840M delivers a theoretical peak FP32 throughput of 1,484.8 GFLOPS, while the Lisuan Tech LX ULTRA lists an FP32 figure of 24.58 TFLOPS. That is a substantial numerical gap on paper, but without benchmark results, the database treats both as equivalent in percentile standing. The LX ULTRA also posts a pixel rate of 192.0 GPixel/s and a texture rate of 384.0 GTexel/s, compared to the 840M's 23.20 GPixel/s and 46.40 GTexel/s. These are raw specification limits, not measured outcomes, so they do not constitute verified wins in the benchmark record.

The data shows no scenario where either product outperforms the other in a recorded test. Both share a percentile rank of 50, which places them at the median of the database's GPU distribution. Until benchmark entries populate the head-to-head table, any statement about relative speed remains speculative. The only concrete comparison available comes from specification-derived rates, which favor the LX ULTRA by a wide margin in every throughput metric listed.

Architecture Differences

The AMD Radeon 840M uses the Krackan Point chip built on the RDNA 3.5 architecture, belonging to the Navi III IGP generation for Strix Point Mobile. It is fabricated on a 4 nm process at TSMC. The Lisuan Tech LX ULTRA uses the 7G105 chip with the TrueGPU architecture, part of the 7G100 generation, also produced by TSMC but on a 6 nm process. The node difference is small but present: 4 nm versus 6 nm.

The 840M has 256 shading units, 16 texture mapping units, and 8 render output units. It also includes 4 ray tracing cores. The LX ULTRA has 6144 shading units, 192 TMUs, and 96 ROPs, with no ray tracing cores listed. The shading unit count is 24 times higher on the LX ULTRA, which drives its much higher theoretical FP32 output. The 840M's FP16 performance is identical to its FP32 at 1,484.8 GFLOPS, indicating a 1:1 ratio. The LX ULTRA's FP16 reaches 49.15 TFLOPS at a 2:1 ratio relative to its FP32, meaning it processes half-precision at double the rate of single-precision.

Memory architecture separates the two sharply. The 840M uses system shared memory with a bandwidth listed as system dependent. The LX ULTRA has dedicated 24 GB of GDDR6 memory on a 192 bit bus, delivering 432.0 GB/s of bandwidth. Its memory clock is listed at 2250 MHz with 18 Gbps effective data rate. The 840M has no dedicated memory clock, bus width, or capacity figures because it relies on the host system's RAM.

API support differs in Vulkan version. Both support DirectX 12 Ultimate (12_2) and OpenGL 4.6. The 840M supports Vulkan 1.4, while the LX ULTRA lists Vulkan 1.3. The 840M connects via PCIe 4.0 x8, whereas the LX ULTRA uses PCIe 4.0 x16, doubling the interface width. Both are active production products, with the 840M released on 2025-02-28 and the LX ULTRA released on 2026-03-16.

FAQ

Q: What is the FP32 performance difference between the two GPUs?

A: The AMD Radeon 840M delivers 1,484.8 GFLOPS of FP32 throughput, while the Lisuan Tech LX ULTRA delivers 24.58 TFLOPS. The LX ULTRA's figure is roughly 16.5 times higher based on the recorded specifications.

Q: Do both GPUs support ray tracing?

A: No. The AMD Radeon 840M includes 4 ray tracing cores. The Lisuan Tech LX ULTRA lists no ray tracing cores in the database.

Q: How much memory does each GPU have?

A: The AMD Radeon 840M uses system shared memory with no dedicated capacity, type, or bus width listed. The Lisuan Tech LX ULTRA has 24 GB of GDDR6 memory on a 192 bit bus with 432.0 GB/s bandwidth.

Q: What are the process nodes for each chip?

A: The AMD Radeon 840M is built on a 4 nm process at TSMC. The Lisuan Tech LX ULTRA is built on a 6 nm process, also at TSMC.

Q: Which GPU has higher pixel and texture rates?

A: The Lisuan Tech LX ULTRA has a pixel rate of 192.0 GPixel/s and a texture rate of 384.0 GTexel/s. The AMD Radeon 840M has a pixel rate of 23.20 GPixel/s and a texture rate of 46.40 GTexel/s.

Q: What is the power consumption of each product?

A: The AMD Radeon 840M has a TDP of 15 W. The Lisuan Tech LX ULTRA has a TDP of 225 W and a suggested PSU rating of 550 W.

Specification Differences

The two products differ across nearly every recorded specification field. The AMD Radeon 840M uses a 4 nm process node, while the LX ULTRA uses 6 nm. The 840M has a base clock of 400 MHz and a boost clock of 2900 MHz; the LX ULTRA lists no base or boost clocks. Memory differs completely: the 840M uses system shared memory with dependent bandwidth, while the LX ULTRA has 24 GB GDDR6 at 2250 MHz with 432.0 GB/s over a 192 bit bus.

Shading units: 256 on the 840M versus 6144 on the LX ULTRA. TMUs: 16 versus 192. ROPs: 8 versus 96. Ray tracing cores: 4 on the 840M, none on the LX ULTRA. Pixel rate: 23.20 GPixel/s versus 192.0 GPixel/s. Texture rate: 46.40 GTexel/s versus 384.0 GTexel/s. FP32: 1,484.8 GFLOPS versus 24.58 TFLOPS. FP16: 1,484.8 GFLOPS (1:1) versus 49.15 TFLOPS (2:1).

TDP: 15 W versus 225 W. Slot width: IGP versus dual-slot. Power connectors: none versus 1x 16-pin. Suggested PSU: not listed for the 840M, 550 W for the LX ULTRA. Bus interface: PCIe 4.0 x8 versus PCIe 4.0 x16. Display outputs: portable device dependent for the 840M, 4x DisplayPort 1.4a for the LX ULTRA. Vulkan support: 1.4 on the 840M, 1.3 on the LX ULTRA. The LX ULTRA has physical dimensions of 268 mm length, 112 mm height, and 40 mm width; the 840M has no listed dimensions as an integrated GPU.

Both share DirectX 12 Ultimate (12_2) and OpenGL 4.6 support. Both are active production parts. The 840M has no launch MSRP in the database, and the LX ULTRA also has no launch MSRP listed. The predecessor field lists "Navi II IGP" for the 840M, while the LX ULTRA has no predecessor. The 840M was released on 2025-02-28, the LX ULTRA on 2026-03-16.

The Verdict

The database contains no benchmark results for either product, so the verdict rests entirely on recorded specifications. The Lisuan Tech LX ULTRA holds a commanding lead in every computed throughput metric: FP32, FP16, pixel rate, and texture rate. It also has dedicated memory with a defined bandwidth of 432.0 GB/s, whereas the 840M depends on system memory with no fixed bandwidth figure. The LX ULTRA's 24 GB GDDR6 allocation dwarfs the shared memory approach of the 840M.

The AMD Radeon 840M is a 15 W integrated GPU with 256 shading units and 4 ray tracing cores. Its PCIe 4.0 x8 interface and system shared memory suit a portable device, as indicated by its display output descriptor. The LX ULTRA is a 225 W dual-slot discrete card with a 1x 16-pin power connector, a 550 W suggested PSU, and 4x DisplayPort 1.4a outputs. It requires a full-length expansion slot at 268 mm.

Data from the database indicates the LX ULTRA is designed for high-throughput rendering workloads where the 24.58 TFLOPS FP32 figure and 192.0 GPixel/s pixel rate can be exercised. The 840M, with 1,484.8 GFLOPS FP32 and 23.20 GPixel/s, fits scenarios where power draw is constrained to 15 W and the host system provides shared memory. Neither product has a recorded benchmark score, so neither can be declared faster in real-world tests. The specification sheet favors the LX ULTRA in absolute performance, but the 840M offers ray tracing capability that the LX ULTRA lacks.

Where Each One Wins

The Lisuan Tech LX ULTRA wins in raw compute throughput. Its FP32 output of 24.58 TFLOPS exceeds the 840M's 1,484.8 GFLOPS by a factor of roughly 16.5. FP16 reaches 49.15 TFLOPS on the LX ULTRA versus 1,484.8 GFLOPS on the 840M. Pixel rate favors the LX ULTRA at 192.0 GPixel/s versus 23.20 GPixel/s, and texture rate favors it at 384.0 GTexel/s versus 46.40 GTexel/s. The 24 GB GDDR6 memory with 432.0 GB/s bandwidth provides a defined memory subsystem, while the 840M's bandwidth is system dependent.

The AMD Radeon 840M wins in power efficiency and integration. Its 15 W TDP is drastically lower than the LX ULTRA's 225 W. It occupies an IGP slot with no power connectors, while the LX ULTRA needs a 1x 16-pin connector and a 550 W PSU. The 840M also includes 4 ray tracing cores, a feature absent from the LX ULTRA's specification. Its Vulkan 1.4 support is newer than the LX ULTRA's Vulkan 1.3. The 4 nm process node is smaller than the 6 nm node of the LX ULTRA, suggesting a more compact manufacturing approach.

The LX ULTRA's PCIe 4.0 x16 interface doubles the bandwidth available to the 840M's PCIe 4.0 x8 link. Its display outputs are fixed at 4x DisplayPort 1.4a, whereas the 840M's outputs are portable device dependent, meaning the 840M is intended for mobile or compact systems while the LX ULTRA targets desktop workstations with multiple external monitors.

The 840M's ray tracing cores give it a feature the LX ULTRA cannot match, but the LX ULTRA's 96 ROPs and 192 TMUs provide far higher rasterization throughput limits. For workloads that rely on FP32 compute, dedicated memory bandwidth, or high pixel fill rates, the LX ULTRA is the clear choice from the recorded data. For workloads that require low power draw, integrated form factor, or hardware ray tracing, the 840M holds the advantage. The database shows no measured benchmark wins for either product, so these conclusions derive strictly from the specification sheet.