AMD Radeon 820M vs NVIDIA N1X 48SM Comparison

FAQ

Q: What are the architectural generations of the AMD Radeon 820M and NVIDIA N1X 48SM?

A: The AMD Radeon 820M uses the RDNA 3.5 architecture from the Navi III IGP (Strix Point Mobile) generation, built on TSMC's 4 nm process. The NVIDIA N1X 48SM uses the Blackwell 2.0 architecture from the Blackwell IGP (N1x) generation, built on TSMC's 5 nm process.

Q: How do the shading unit counts compare between the two?

A: The AMD Radeon 820M has 128 shading units, while the NVIDIA N1X 48SM has 6144 shading units. That is 48 times more shading units on the NVIDIA part.

Q: What memory configurations do these integrated GPUs support?

A: The AMD Radeon 820M uses system shared memory with system-dependent bandwidth. The NVIDIA N1X 48SM uses 128 GB of LPDDR5X memory on a 256-bit bus, providing 273.2 GB/s of bandwidth.

Q: What is the FP32 compute throughput of each GPU?

A: The AMD Radeon 820M delivers 716.8 GFLOPS of FP32 compute. The NVIDIA N1X 48SM delivers 28.83 TFLOPS, which is approximately 40 times higher.

Q: What are the boost clock speeds?

A: The AMD Radeon 820M has a boost clock of 2800 MHz, while the NVIDIA N1X 48SM has a boost clock of 2346 MHz. The AMD part runs at a higher boost frequency.

Q: What is the pixel rate difference?

A: The AMD Radeon 820M achieves 11.20 GPixel/s, while the NVIDIA N1X 48SM achieves 112.6 GPixel/s, roughly 10 times higher.

Architecture Differences

The two integrated GPUs come from different architectural lineages. AMD's Radeon 820M is based on RDNA 3.5, a 4 nm design from TSMC, and belongs to the Navi III IGP (Strix Point Mobile) generation. NVIDIA's N1X 48SM is based on Blackwell 2.0, a 5 nm design also from TSMC, belonging to the Blackwell IGP (N1x) generation.

The NVIDIA part has a much larger die at 382 mm², while the AMD die size is not recorded. Transistor counts are unknown for both. The NVIDIA chip uses a GB20B chip, while the AMD chip is designated Krackan Point 2.

Ray tracing hardware differs substantially. The AMD Radeon 820M has 2 RT cores, while the NVIDIA N1X 48SM has 48 RT cores. Tensor cores are present only on the NVIDIA part, with 192 tensor cores, while the AMD part does not list any tensor cores.

Texture and render output resources also scale very differently. The AMD Radeon 820M has 8 TMUs and 4 ROPs. The NVIDIA N1X 48SM has 384 TMUs and 48 ROPs.

The bus interface differs: the AMD part uses PCIe 4.0 x8, while the NVIDIA part uses PCIe 5.0 x16. The AMD part has display outputs described as portable device dependent, while the NVIDIA part lists 1x HDMI.

API support is a major separator. The AMD Radeon 820M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA N1X 48SM lists N/A for DirectX, OpenGL, and Vulkan support.

Both are integrated GPUs with no power connectors and an IGP slot width. The AMD part has a TDP of 15 W, while the NVIDIA TDP is unknown. The AMD part has a base clock of 400 MHz and a boost clock of 2800 MHz. The NVIDIA part has a base clock of 741 MHz and a boost clock of 2346 MHz, with memory clocked at 1067 MHz (8.5 Gbps effective).

Head-to-Head Benchmarks

The recorded benchmark data contains no direct head-to-head scores for these two parts, but the specification differences provide a clear comparative picture.

The largest advantage for the NVIDIA N1X 48SM is in raw shading throughput. With 6144 shading units versus 128, the NVIDIA part delivers 28.83 TFLOPS of FP32 compute, which is roughly 40 times the 716.8 GFLOPS of the AMD Radeon 820M. FP16 performance is identical in ratio: both run FP16 at a 1:1 ratio with FP32, so the NVIDIA part again delivers 28.83 TFLOPS versus 716.8 GFLOPS.

Texture rate follows the same pattern. The AMD Radeon 820M achieves 22.40 GTexel/s, while the NVIDIA N1X 48SM achieves 900.9 GTexel/s, about 40 times higher. Pixel rate is a 10-fold gap, with 11.20 GPixel/s versus 112.6 GPixel/s.

Memory bandwidth heavily favors the NVIDIA part. The AMD Radeon 820M uses system shared memory with system-dependent bandwidth, so no fixed number can be compared. The NVIDIA N1X 48SM has a fixed 273.2 GB/s from 128 GB of LPDDR5X on a 256-bit bus. The AMD part has no dedicated memory pool, and its bandwidth depends on the host system.

The AMD Radeon 820M does hold an advantage in boost clock frequency. It boosts to 2800 MHz, while the NVIDIA part boosts to 2346 MHz, a difference of 454 MHz in favor of AMD. The AMD part also runs at a lower base clock of 400 MHz versus 741 MHz for the NVIDIA part.

The NVIDIA N1X 48SM also leads in ray tracing resources, with 48 RT cores versus 2, and in tensor cores, with 192 versus none listed. The AMD part counters with a full modern API set, including DirectX 12 Ultimate, while the NVIDIA part lists no DirectX, OpenGL, or Vulkan support in the database.

Specification Differences

The two parts differ in nearly every measured specification. The process node is 4 nm for AMD and 5 nm for NVIDIA. Die size is unknown for AMD and 382 mm² for NVIDIA.

Clock speeds differ: AMD base clock is 400 MHz, NVIDIA base clock is 741 MHz. AMD boost is 2800 MHz, NVIDIA boost is 2346 MHz. The NVIDIA part has a fixed memory clock of 1067 MHz (8.5 Gbps effective), while the AMD memory clock is listed as system shared.

Memory configuration: AMD uses system shared memory with system-dependent bandwidth. NVIDIA uses 128 GB of LPDDR5X with a 256-bit bus and 273.2 GB/s bandwidth.

Core counts: AMD has 128 shading units, 8 TMUs, 4 ROPs, 2 RT cores, and no tensor cores. NVIDIA has 6144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 192 tensor cores.

Rates: AMD pixel rate is 11.20 GPixel/s, texture rate is 22.40 GTexel/s, FP32 is 716.8 GFLOPS, FP16 is 716.8 GFLOPS (1:1). NVIDIA pixel rate is 112.6 GPixel/s, texture rate is 900.9 GTexel/s, FP32 is 28.83 TFLOPS, FP16 is 28.83 TFLOPS (1:1).

TDP: AMD is 15 W, NVIDIA is unknown. Bus interface: AMD is PCIe 4.0 x8, NVIDIA is PCIe 5.0 x16. Display outputs: AMD is portable device dependent, NVIDIA is 1x HDMI. API support: AMD lists DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4. NVIDIA lists N/A for all three.

Release dates: AMD released on 2025-02-28, NVIDIA on 2026-05-31. Production status is Active for both. Neither part has a launch MSRP.

The Verdict

The data shows a massive performance tier separation. The NVIDIA N1X 48SM is in a different compute class entirely, with 40 times the FP32 throughput, 40 times the texture rate, and 10 times the pixel rate compared to the AMD Radeon 820M. Its fixed 273.2 GB/s memory bandwidth also removes the system-dependent variability that limits the AMD part.

The AMD Radeon 820M does have a higher boost clock at 2800 MHz versus 2346 MHz, a smaller 4 nm process, and a much lower TDP at 15 W. It also carries a full modern API stack, including DirectX 12 Ultimate and Vulkan 1.4, while the NVIDIA part lists no API support in the database.

For tasks that rely on raw shader throughput, texture work, pixel fill, ray tracing, or tensor operations, the NVIDIA N1X 48SM is the clear choice based on every recorded compute metric. For tasks that require a low-power integrated GPU with a complete DirectX 12 Ultimate feature set and a higher boost clock, the AMD Radeon 820M is the only part with those recorded capabilities.

The NVIDIA part also has a much larger die at 382 mm², which correlates with its higher resource counts. The AMD part, with its 4 nm node and 15 W TDP, is positioned for power-constrained portable systems. The NVIDIA part, with its 128 GB memory pool and PCIe 5.0 x16 interface, is positioned for high-bandwidth integrated workloads.

Neither part has recorded benchmark scores or nearest rivals in the database, so percentile rankings are both at 50. The verdict rests entirely on the specification deltas.

Where Each One Wins

The NVIDIA N1X 48SM wins in every raw throughput category recorded. FP32 compute is 28.83 TFLOPS versus 716.8 GFLOPS, a 40-fold advantage. FP16 compute follows the same ratio. Texture rate is 900.9 GTexel/s versus 22.40 GTexel/s. Pixel rate is 112.6 GPixel/s versus 11.20 GPixel/s. Ray tracing resources are 48 RT cores versus 2. Tensor cores exist only on the NVIDIA part at 192. Memory bandwidth is fixed at 273.2 GB/s versus system dependent. The NVIDIA part also has a wider bus interface at PCIe 5.0 x16 and a larger die at 382 mm².

The AMD Radeon 820M wins in efficiency-oriented and compatibility-oriented categories. It has a smaller process node at 4 nm versus 5 nm. Its TDP is recorded at 15 W, while the NVIDIA TDP is unknown. Its boost clock is 2800 MHz versus 2346 MHz. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the NVIDIA part lists no API support. Its display outputs are portable device dependent, while the NVIDIA part is limited to 1x HDMI.

Use-case splits follow directly from these numbers. High-throughput compute, machine learning via tensor cores, ray-traced workloads, and high-resolution texturing all favor the NVIDIA N1X 48SM. Low-power integrated graphics, legacy API compatibility, and portable device display flexibility favor the AMD Radeon 820M. The AMD part also has a lower base clock at 400 MHz, which may indicate a wider dynamic range for power management. The NVIDIA part, with 48 SM units and 6144 shading units, is designed for maximum throughput within an integrated form factor.