AMD Radeon 820M vs Lisuan Tech LX ULTRA Comparison

AMD Radeon 820M and Lisuan Tech LX ULTRA occupy opposite ends of the hardware spectrum, yet both are recorded as active products in the database. The Radeon 820M is an integrated graphics processor (IGP) built for compact, low-power systems, while the LX ULTRA is a large dual-slot discrete card with a 225 W power draw. Because the database contains no direct head-to-head benchmark scores for these two parts, the comparison rests entirely on their recorded specifications, architectural details, and rated output rates.

Head-to-Head Benchmarks

The database does not include any shared benchmark results for the AMD Radeon 820M and the Lisuan Tech LX ULTRA. There are no recorded wins for either part in a direct comparison, and no average benchmark scores or percentile rankings separate them; both hold a 50th percentile position against all GPUs in the database. This is an unusual situation, as most paired comparisons in the database include at least some synthetic test results. The absence of benchmark data means the analysis must rely on the rated throughput figures and memory performance that are present.

The most striking numerical difference appears in raw compute throughput. The LX ULTRA delivers 24.58 TFLOPS of FP32 performance, while the Radeon 820M produces 716.8 GFLOPS. Converting the Radeon 820M's figure to TFLOPS yields 0.7168 TFLOPS, which means the LX ULTRA is roughly 34 times higher in single-precision floating-point throughput. In FP16, the gap shifts slightly because of differing ratios. The Radeon 820M maintains a 1:1 ratio, so its FP16 output stays at 716.8 GFLOPS. The LX ULTRA uses a 2:1 ratio, doubling its FP16 to 49.15 TFLOPS, which is about 68 times the Radeon 820M's FP16 rate.

Pixel and texture fill rates follow the same pattern. The LX ULTRA reaches 192.0 GPixel/s and 384.0 GTexel/s, whereas the Radeon 820M manages 11.20 GPixel/s and 22.40 GTexel/s. These are not benchmark scores, but they represent the theoretical maximum output rates based on clock speeds and unit counts. The LX ULTRA has a 96 ROP count and 192 TMUs, compared to 4 ROPs and 8 TMUs on the Radeon 820M. Memory bandwidth is another decisive separation: the LX ULTRA's GDDR6 memory provides 432.0 GB/s over a 192-bit bus, while the Radeon 820M uses system shared memory with bandwidth described as system dependent. That dependency means the 820M's memory throughput varies with the host platform's RAM configuration, not a fixed figure.

Where Each One Wins

The AMD Radeon 820M wins in power efficiency and physical footprint. Its 15 W TDP is dramatically lower than the LX ULTRA's 225 W, and it requires no power connectors, while the LX ULTRA needs a single 16-pin connector and a suggested 550 W power supply. The 820M is an IGP, meaning it occupies no expansion slot and uses the host system's memory, making it suitable for portable devices with minimal cooling. The LX ULTRA, by contrast, is a dual-slot card measuring 268 mm in length, 112 mm in height, and 40 mm in width, which requires a desktop chassis with adequate clearance and airflow.

The Lisuan Tech LX ULTRA wins on every performance-related specification in the database. Its 6144 shading units dwarf the 820M's 128 shading units. The LX ULTRA also has dedicated 24 GB of GDDR6 memory, whereas the 820M has no dedicated VRAM. The LX ULTRA supports four DisplayPort 1.4a outputs, while the 820M's display outputs are listed as portable device dependent, meaning connectivity varies by the host device. The LX ULTRA uses a PCIe 4.0 x16 interface, twice the lane width of the 820M's PCIe 4.0 x8.

In terms of API support, both parts reach DirectX 12 Ultimate (12_2) and OpenGL 4.6. The Radeon 820M supports Vulkan 1.4, while the LX ULTRA supports Vulkan 1.3. That gives the 820M a small software advantage in the latest Vulkan revision, though this is a specification difference rather than a measured performance outcome.

Architecture Differences

The Radeon 820M uses the RDNA 3.5 architecture, built on TSMC's 4 nm process. Its chip is designated Krackan Point 2, and it belongs to the Navi III IGP (Strix Point Mobile) generation. The LX ULTRA uses an architecture called TrueGPU, fabricated on a 6 nm process at the same foundry, TSMC. Its chip is labeled 7G105, part of the 7G100 generation.

The Radeon 820M includes 2 ray tracing cores, a feature the LX ULTRA does not list in its specifications. Neither part records tensor core counts. The Radeon 820M has a base clock of 400 MHz and a boost clock of 2800 MHz. The LX ULTRA does not have recorded base or boost clock speeds in the database. Instead, its memory clock is listed as 2250 MHz with 18 Gbps effective speed.

Memory architecture is fundamentally different. The 820M uses system shared memory with a system shared bus width and system dependent bandwidth. The LX ULTRA has 24 GB of GDDR6 on a 192-bit bus, yielding a fixed 432.0 GB/s bandwidth. The 820M's FP16 performance equals its FP32 at a 1:1 ratio, which is typical for parts without dedicated tensor hardware and reflects a simpler execution path. The LX ULTRA's 2:1 FP16 ratio indicates a more specialized path for half-precision workloads, doubling throughput relative to FP32.

The Radeon 820M is listed as the successor to Navi II IGP, while the LX ULTRA has no predecessor recorded. The 820M was released on 2025-02-28, and the LX ULTRA on 2026-03-16. Both are marked as active production parts. Neither has a recorded launch MSRP, so no pricing information is available in the database.

The Verdict

The data in the database points to a clear separation of use cases. The Lisuan Tech LX ULTRA is the only choice for workloads that require high fill rates, large memory capacity, or massive parallel compute. Its 24.58 TFLOPS FP32, 432.0 GB/s bandwidth, and 24 GB VRAM are figures that the Radeon 820M cannot approach in any configuration, because the 820M's memory bandwidth is dependent on the host system and its FP32 output is under 1 TFLOPS.

The AMD Radeon 820M is the only choice for systems where power draw and space are the primary constraints. Its 15 W TDP requires no auxiliary power, no expansion slot, and no dedicated cooling beyond what a portable device already provides. The 820M's performance is sufficient for basic graphics output and light workloads, but the recorded data does not include any benchmark scores to quantify that performance.

For a user building a desktop with a 550 W power supply and room for a 268 mm dual-slot card, the LX ULTRA is the superior part across every measured specification. For a thin-and-light device or an embedded system where the 225 W TDP and physical size of the LX ULTRA are impossible to accommodate, the Radeon 820M is the only viable option between these two. The choice is not about which GPU is better in absolute terms; it is about which constraints matter more to the system in question.

FAQ

Q: Which GPU has higher FP32 performance?

A: The Lisuan Tech LX ULTRA, with 24.58 TFLOPS compared to the AMD Radeon 820M's 716.8 GFLOPS.

Q: Do both GPUs support DirectX 12 Ultimate?

A: Yes, both the AMD Radeon 820M and the Lisuan Tech LX ULTRA support DirectX 12 Ultimate (12_2).

Q: How much memory does the Lisuan Tech LX ULTRA have?

A: The LX ULTRA has 24 GB of GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth. The Radeon 820M uses system shared memory with system dependent bandwidth.

Q: What is the power draw difference between the two?

A: The Radeon 820M has a 15 W TDP, while the LX ULTRA has a 225 W TDP. The LX ULTRA also lists a suggested 550 W power supply.

Q: Which GPU has ray tracing cores?

A: The AMD Radeon 820M includes 2 ray tracing cores. The Lisuan Tech LX ULTRA does not list any ray tracing cores in its specifications.

Q: What is the process node for each GPU?

A: The Radeon 820M is built on a 4 nm process, and the LX ULTRA is built on a 6 nm process. Both are fabricated by TSMC.

Specification Differences

| Specification | AMD Radeon 820M | Lisuan Tech LX ULTRA |

|---|---|---|

| Architecture | RDNA 3.5 | TrueGPU |

| Process Node | 4 nm | 6 nm |

| Chip | Krackan Point 2 | 7G105 |

| Generation | Navi III IGP (Strix Point Mobile) | 7G100 |

| Shading Units | 128 | 6144 |

| TMUs | 8 | 192 |

| ROPs | 4 | 96 |

| Ray Tracing Cores | 2 | Not listed |

| Base Clock | 400 MHz | Not listed |

| Boost Clock | 2800 MHz | Not listed |

| Memory Size | System Shared | 24 GB |

| Memory Type | System Shared | GDDR6 |

| Memory Bus Width | System Shared | 192 bit |

| Memory Bandwidth | System Dependent | 432.0 GB/s |

| Pixel Rate | 11.20 GPixel/s | 192.0 GPixel/s |

| Texture Rate | 22.40 GTexel/s | 384.0 GTexel/s |

| FP32 | 716.8 GFLOPS | 24.58 TFLOPS |

| FP16 | 716.8 GFLOPS (1:1) | 49.15 TFLOPS (2:1) |

| TDP | 15 W | 225 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | Not listed | 550 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |

| Display Outputs | Portable Device Dependent | 4x DisplayPort 1.4a |

| Vulkan Support | 1.4 | 1.3 |

| Dimensions | Not listed | 268 mm x 112 mm x 40 mm |

| Release Date | 2025-02-28 | 2026-03-16 |