AMD Radeon 820M vs NVIDIA GeForce RTX 5090 SE Comparison

Where Each One Wins

The AMD Radeon 820M and NVIDIA GeForce RTX 5090 SE occupy opposite ends of the GPU spectrum, and the recorded data reflects a complete separation of use cases. The Radeon 820M is an integrated graphics processor (IGP) built for lightweight mobile workloads, while the RTX 5090 SE is a discrete, dual-slot desktop card designed for maximum compute throughput. There are no head-to-head benchmark wins in the database because the two parts never compete directly; instead, each wins within its own intended environment.

The Radeon 820M delivers 716.8 GFLOPS of FP32 performance and 716.8 GFLOPS of FP16 performance, with a 1:1 ratio. It uses system-shared memory, meaning its bandwidth is system dependent rather than fixed. This makes it suitable for basic display output, light productivity, and casual 2D or older 3D workloads where power draw is minimal at 15 W. Its pixel rate of 11.20 GPixel/s and texture rate of 22.40 GTexel/s are modest figures that align with an entry-level IGP. The 820M wins in scenarios where the entire system must remain compact, fanless, or battery-efficient, as it requires no power connectors and occupies no expansion slot.

The RTX 5090 SE wins decisively in every raw performance category. It produces 66.94 TFLOPS of FP32, which is roughly 93 times the Radeon 820M's FP32 output. Its texture rate of 1,045.9 GTexel/s is about 47 times higher, and its pixel rate of 380.3 GPixel/s is about 34 times higher. The card carries 24 GB of GDDR7 memory on a 384-bit bus, yielding 1.34 TB/s of bandwidth, whereas the Radeon 820M has no dedicated memory at all. The RTX 5090 SE also includes 110 RT cores and 440 tensor cores, features entirely absent from the Radeon 820M's specification. These figures point to workloads such as high-resolution gaming, 3D rendering, AI inference, and scientific compute, where the 820M cannot participate meaningfully.

The use-case split is therefore absolute: the Radeon 820M wins in low-power integrated scenarios, while the RTX 5090 SE wins in every measurable performance metric for demanding applications. The database records zero wins for each side in direct head-to-head comparisons simply because no such comparison exists; the two products target mutually exclusive markets.

Architecture Differences

The two GPUs come from different manufacturers and different architectural generations. The Radeon 820M uses AMD's RDNA 3.5 architecture on a 4 nm TSMC process. It is part of the Navi III IGP generation for Strix Point Mobile and is built on the Krackan Point 2 chip. The RTX 5090 SE uses NVIDIA's Blackwell 2.0 architecture on a 5 nm TSMC process, built on the GB202 chip. Both are fabricated by TSMC, but the Radeon 820M uses a denser 4 nm node versus the RTX 5090 SE's 5 nm node.

The transistor counts differ drastically. The RTX 5090 SE contains 92,200 million transistors on a 750 mm² die, giving a transistor density of 122.9 million per square millimeter. The Radeon 820M's transistor count and die size are listed as unknown in the database, so no direct comparison is possible. The RTX 5090 SE's die is enormous, while the Radeon 820M, as an IGP, shares a package with its host processor.

Core configurations diverge sharply. The Radeon 820M has 128 shading units, 8 texture mapping units (TMUs), 4 raster output units (ROPs), and 2 RT cores. The RTX 5090 SE has 14,080 shading units, 440 TMUs, 160 ROPs, 110 RT cores, and 440 tensor cores. The RTX 5090 SE's shading unit count is 110 times higher, its TMU count is 55 times higher, and its ROP count is 40 times higher. The Radeon 820M has no tensor cores at all, while the RTX 5090 SE's 440 tensor cores enable dedicated AI acceleration.

Clock behavior also differs. The Radeon 820M has a base clock of 400 MHz and a boost clock of 2800 MHz. The RTX 5090 SE has a base clock of 1740 MHz and a boost clock of 2377 MHz. The Radeon 820M's boost clock is higher than the RTX 5090 SE's boost clock, but this does not compensate for the massive difference in core count. The Radeon 820M's memory runs at system-shared speed, while the RTX 5090 SE's GDDR7 memory operates at 1750 MHz with 28 Gbps effective speed.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Radeon 820M uses a PCIe 4.0 x8 interface, while the RTX 5090 SE uses PCIe 5.0 x16. The Radeon 820M is an IGP with no slot width, no power connectors, and portable-device-dependent display outputs. The RTX 5090 SE is dual-slot, uses a single 16-pin power connector, and requires a 900 W suggested PSU. Its display outputs are 1x HDMI 2.1b and 3x DisplayPort 2.1b.

FAQ

Q: Which GPU has a higher boost clock?

A: The AMD Radeon 820M has a boost clock of 2800 MHz, while the NVIDIA GeForce RTX 5090 SE has a boost clock of 2377 MHz. The Radeon 820M's boost clock is 423 MHz higher.

Q: How do the FP32 performance figures compare?

A: The RTX 5090 SE delivers 66.94 TFLOPS of FP32, while the Radeon 820M delivers 716.8 GFLOPS. The RTX 5090 SE's FP32 output is roughly 93 times higher.

Q: What memory configurations do the two GPUs use?

A: The Radeon 820M uses system-shared memory with system-dependent bandwidth. The RTX 5090 SE has 24 GB of GDDR7 memory on a 384-bit bus with 1.34 TB/s of bandwidth.

Q: Does the Radeon 820M support ray tracing?

A: Yes, the Radeon 820M includes 2 RT cores, but the RTX 5090 SE includes 110 RT cores. The RTX 5090 SE has a substantially higher ray-tracing hardware count.

Q: What are the power requirements of each GPU?

A: The Radeon 820M has a TDP of 15 W and requires no power connectors. The RTX 5090 SE has a TDP of 500 W and uses a single 16-pin power connector with a 900 W suggested PSU.

Q: Which GPU has a larger die?

A: The RTX 5090 SE has a die size of 750 mm² with 92,200 million transistors. The Radeon 820M's die size and transistor count are listed as unknown in the database.

Specification Differences

The table below lists only the fields where the two GPUs differ, based on the recorded data.

| Field | AMD Radeon 820M | NVIDIA GeForce RTX 5090 SE |

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

| Manufacturer | AMD | NVIDIA |

| Chip | Krackan Point 2 | GB202 |

| Architecture | RDNA 3.5 | Blackwell 2.0 |

| Generation | Navi III IGP (Strix Point Mobile) | GeForce 50 |

| Process Node | 4 nm | 5 nm |

| Transistors | Unknown | 92,200 million |

| Die Size | Unknown | 750 mm² |

| Transistor Density | Not listed | 122.9M / mm² |

| Base Clock | 400 MHz | 1740 MHz |

| Boost Clock | 2800 MHz | 2377 MHz |

| Memory Clock | System Shared | 1750 MHz 28 Gbps effective |

| Memory Size | System Shared | 24 GB |

| Memory Type | System Shared | GDDR7 |

| Memory Bus Width | System Shared | 384 bit |

| Memory Bandwidth | System Dependent | 1.34 TB/s |

| Shading Units | 128 | 14,080 |

| TMUs | 8 | 440 |

| ROPs | 4 | 160 |

| RT Cores | 2 | 110 |

| Tensor Cores | Not listed | 440 |

| Pixel Rate | 11.20 GPixel/s | 380.3 GPixel/s |

| Texture Rate | 22.40 GTexel/s | 1,045.9 GTexel/s |

| FP32 | 716.8 GFLOPS | 66.94 TFLOPS |

| FP16 | 716.8 GFLOPS (1:1) | 66.94 TFLOPS (1:1) |

| TDP | 15 W | 500 W |

| Slot Width | IGP | Dual-slot |

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

| Suggested PSU | Not listed | 900 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 5.0 x16 |

| Display Outputs | Portable Device Dependent | 1x HDMI 2.1b, 3x DisplayPort 2.1b |

| Dimensions | Not listed | 267 mm x 111 mm x 40 mm |

| Release Date | 2025-02-28 | 2025-12-31 |

| Predecessor | Navi II IGP | GeForce 40 |

| Successor | Not listed | GeForce 60 |

| Launch MSRP | Not listed | 1,499 USD |

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two GPUs, and the wins count is zero for each side. However, the specification-level data provides a clear quantitative comparison across every performance metric.

The largest gap appears in FP32 throughput. The RTX 5090 SE delivers 66.94 TFLOPS, which is 93.4 times the Radeon 820M's 716.8 GFLOPS. This means the RTX 5090 SE can process 66.22 TFLOPS more than the Radeon 820M in a single second. The FP16 figures mirror this exactly, with both cards operating at a 1:1 FP16 to FP32 ratio, so the RTX 5090 SE also delivers 66.94 TFLOPS of FP16 versus the Radeon 820M's 716.8 GFLOPS.

Texture throughput shows a similar disparity. The RTX 5090 SE sustains 1,045.9 GTexel/s, which is 46.7 times the Radeon 820M's 22.40 GTexel/s. Pixel throughput favors the RTX 5090 SE at 380.3 GPixel/s versus 11.20 GPixel/s, a 34.0 times difference. These ratios reflect the core count differences: the RTX 5090 SE has 55 times more TMUs and 40 times more ROPs than the Radeon 820M.

Memory bandwidth is perhaps the most fundamental separation. The RTX 5090 SE has a fixed 1.34 TB/s of bandwidth from its 24 GB GDDR7 memory on a 384-bit bus. The Radeon 820M has no dedicated memory; its bandwidth is system dependent and shared with the host CPU. The RTX 5090 SE's memory clock of 1750 MHz with 28 Gbps effective speed provides a fixed, high-bandwidth path, while the Radeon 820M's memory clock is tied to the system's shared memory frequency.

The RT core count difference is 55 to 1 in favor of the RTX 5090 SE (110 versus 2). The tensor core count has no comparison because the Radeon 820M lists no tensor cores. The RTX 5090 SE's 440 tensor cores enable AI workloads that the Radeon 820M cannot execute in hardware.

Power consumption scales with performance. The RTX 5090 SE draws 500 W, which is 33.3 times the Radeon 820M's 15 W TDP. The RTX 5090 SE also requires a 900 W suggested PSU, whereas the Radeon 820M needs none. The RTX 5090 SE's dual-slot design with a 16-pin connector contrasts with the Radeon 820M's IGP form factor with no connectors.

The bus interface differs as well: PCIe 5.0 x16 for the RTX 5090 SE versus PCIe 4.0 x8 for the Radeon 820M. The RTX 5090 SE's physical dimensions are 267 mm by 111 mm by 40 mm, while the Radeon 820M has no listed dimensions because it is integrated.

Release dates are separated by roughly ten months: the Radeon 820M launched on 2025-02-28, and the RTX 5090 SE launched on 2025-12-31. The RTX 5090 SE has a successor listed as GeForce 60, while the Radeon 820M has no successor listed. The RTX 5090 SE has a launch MSRP of 1,499 USD, while the Radeon 820M has no listed MSRP.

In summary, every numerical comparison in the database shows the RTX 5090 SE outperforming the Radeon 820M by orders of magnitude, with the sole exception of boost clock, where the Radeon 820M's 2800 MHz exceeds the RTX 5090 SE's 2377 MHz. That single clock advantage does not translate into any performance benefit given the 110-fold difference in shading units.