AMD Radeon 840M vs NVIDIA N1X 48SM Comparison

Head-to-Head Benchmarks

The recorded data contains no benchmark entries for either the AMD Radeon 840M or the NVIDIA N1X 48SM. The head-to-head benchmark set is empty, and both parts show zero wins in the comparison table. The average benchmark score for each is listed as zero, and the nearest rivals arrays are empty for both items.

Without measured performance numbers, the comparison must rely on the specification data provided. The Radeon 840M shows a peak FP32 throughput of 1,484.8 GFLOPS, while the N1X 48SM reaches 28.83 TFLOPS in FP32. That represents a substantial difference in raw compute capacity. The N1X 48SM also records a texture rate of 900.9 GTexel/s versus 46.40 GTexel/s for the Radeon, and a pixel rate of 112.6 GPixel/s versus 23.20 GPixel/s.

Both parts sit at the 50th percentile against all GPUs in the database. That percentile field is identical for both, indicating the database currently places them at the same relative position despite the large gap in raw specifications. The absence of benchmark data means the percentile value is not backed by measured workload results.

The N1X 48SM uses 6,144 shading units, 384 texture mapping units, and 48 ROPs. The Radeon 840M uses 256 shading units, 16 TMUs, and 8 ROPs. These counts align with the throughput figures recorded in the database.

In ray tracing resources, the N1X 48SM lists 48 RT cores and 192 tensor cores. The Radeon 840M lists 4 RT cores and no tensor core field entry. The N1X 48SM includes tensor cores as a distinct hardware block, while the Radeon entry leaves that field null.

Clock behavior differs notably. The Radeon 840M has a base clock of 400 MHz and a boost clock of 2900 MHz. The N1X 48SM has a base clock of 741 MHz and a boost clock of 2346 MHz. The Radeon boosts to a higher frequency, but the N1X 48SM starts from a higher base. The Radeon also lists a 1:1 FP16 to FP32 ratio at 1,484.8 GFLOPS, and the N1X 48SM lists the same 1:1 ratio at 28.83 TFLOPS.

Where Each One Wins

The N1X 48SM dominates the raw compute categories in the database. Its FP32 figure of 28.83 TFLOPS is roughly 19 times the Radeon 840M's 1,484.8 GFLOPS. Its texture rate of 900.9 GTexel/s is about 19 times the Radeon's 46.40 GTexel/s. Its pixel rate of 112.6 GPixel/s is nearly 5 times the Radeon's 23.20 GPixel/s. These are the categories where the data shows the largest wins for the N1X 48SM.

The Radeon 840M wins in boost clock frequency. The recorded boost of 2900 MHz exceeds the N1X 48SM's 2346 MHz. The Radeon also has a lower base clock at 400 MHz versus 741 MHz, so its frequency advantage appears only at the top of the boost range.

The Radeon 840M carries API support across DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM lists DirectX, OpenGL, and Vulkan all as N/A in the database. For software stacks that depend on these APIs, the Radeon has the recorded compatibility advantage.

The N1X 48SM shows a memory bandwidth of 273.2 GB/s from LPDDR5X across a 256-bit bus, with memory size listed as 128 GB. The Radeon 840M uses system shared memory with bandwidth listed as system dependent. The N1X 48SM has a fixed, recorded bandwidth figure, while the Radeon's bandwidth cannot be stated as a single number from the data.

The Radeon 840M uses a 4 nm process node, while the N1X 48SM uses a 5 nm node. Both are listed as TSMC foundry parts. The N1X 48SM has a die size of 382 mm²; the Radeon's die size is unknown in the database.

FAQ

Q: Which GPU has higher FP32 compute according to the database?

A: The NVIDIA N1X 48SM records 28.83 TFLOPS in FP32, while the AMD Radeon 840M records 1,484.8 GFLOPS. The N1X 48SM shows roughly 19 times the FP32 throughput.

Q: What are the recorded boost clocks for each GPU?

A: The AMD Radeon 840M has a boost clock of 2900 MHz. The NVIDIA N1X 48SM has a boost clock of 2346 MHz. The Radeon boosts to a higher frequency in the recorded data.

Q: Does the NVIDIA N1X 48SM support DirectX 12 Ultimate?

A: The database lists DirectX as N/A for the N1X 48SM. The AMD Radeon 840M lists DirectX 12 Ultimate (12_2) support.

Q: How much memory bandwidth does the N1X 48SM have?

A: The N1X 48SM records 273.2 GB/s of bandwidth from LPDDR5X memory on a 256-bit bus. The Radeon 840M uses system shared memory and its bandwidth is listed as system dependent.

Q: What are the shading unit counts for both GPUs?

A: The NVIDIA N1X 48SM has 6,144 shading units. The AMD Radeon 840M has 256 shading units.

Q: What process nodes are recorded for each GPU?

A: The AMD Radeon 840M uses a 4 nm TSMC process. The NVIDIA N1X 48SM uses a 5 nm TSMC process.

Specification Differences

The two GPUs differ across nearly every recorded specification field.

Process node: the Radeon 840M uses 4 nm, the N1X 48SM uses 5 nm. Both are TSMC.

Die size: the N1X 48SM is recorded at 382 mm², while the Radeon 840M has no die size entry.

Base clock: 400 MHz for the Radeon, 741 MHz for the N1X 48SM.

Boost clock: 2900 MHz for the Radeon, 2346 MHz for the N1X 48SM.

Memory type: system shared for the Radeon, LPDDR5X for the N1X 48SM.

Memory size: system shared for the Radeon, 128 GB for the N1X 48SM.

Memory bus width: system shared for the Radeon, 256 bit for the N1X 48SM.

Memory bandwidth: system dependent for the Radeon, 273.2 GB/s for the N1X 48SM.

Memory clock: the Radeon lists system shared memory, the N1X 48SM lists 1067 MHz with 8.5 Gbps effective.

Shading units: 256 for the Radeon, 6,144 for the N1X 48SM.

TMUs: 16 for the Radeon, 384 for the N1X 48SM.

ROPs: 8 for the Radeon, 48 for the N1X 48SM.

RT cores: 4 for the Radeon, 48 for the N1X 48SM.

Tensor cores: none listed for the Radeon, 192 for the N1X 48SM.

Pixel rate: 23.20 GPixel/s for the Radeon, 112.6 GPixel/s for the N1X 48SM.

Texture rate: 46.40 GTexel/s for the Radeon, 900.9 GTexel/s for the N1X 48SM.

FP32: 1,484.8 GFLOPS for the Radeon, 28.83 TFLOPS for the N1X 48SM.

FP16: 1,484.8 GFLOPS (1:1) for the Radeon, 28.83 TFLOPS (1:1) for the N1X 48SM.

TDP: 15 W for the Radeon, unknown for the N1X 48SM.

Bus interface: PCIe 4.0 x8 for the Radeon, PCIe 5.0 x16 for the N1X 48SM.

Display outputs: portable device dependent for the Radeon, 1x HDMI for the N1X 48SM.

API support: the Radeon lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM lists N/A for DirectX, OpenGL, and Vulkan.

Release dates: the Radeon 840M is dated 2025-02-28, the N1X 48SM is dated 2026-05-31. Both are listed as Active production status.

Architecture Differences

The AMD Radeon 840M is built on the RDNA 3.5 architecture and belongs to the Navi III IGP generation for Strix Point Mobile. Its chip is Krackan Point. The NVIDIA N1X 48SM uses the Blackwell 2.0 architecture and belongs to the Blackwell IGP generation for N1x, with the chip designated GB20B.

The Radeon 840M uses 256 shading units across 16 TMUs and 8 ROPs, with 4 ray tracing cores and no tensor core entry. The N1X 48SM uses 6,144 shading units across 384 TMUs and 48 ROPs, with 48 ray tracing cores and 192 tensor cores. The N1X 48SM includes a dedicated tensor core block, which the Radeon entry does not record.

Both parts list FP16 at a 1:1 ratio with FP32, meaning the recorded half-precision throughput equals the full-precision figure for each GPU. The N1X 48SM's 1:1 ratio applies at 28.83 TFLOPS, while the Radeon's applies at 1,484.8 GFLOPS.

The N1X 48SM connects through PCIe 5.0 x16, while the Radeon uses PCIe 4.0 x8. The N1X 48SM has a 256-bit memory bus with 128 GB of LPDDR5X, while the Radeon relies on system shared memory with no dedicated bus width or capacity.

The Radeon 840M is fabricated on a 4 nm TSMC node, while the N1X 48SM uses a 5 nm TSMC node. The N1X 48SM has a recorded die size of 382 mm²; the Radeon's die size is not listed.

The Radeon's predecessor is recorded as Navi II IGP, with no successor listed. The N1X 48SM has no predecessor or successor entries. The Radeon's TDP is 15 W, while the N1X 48SM's TDP is unknown in the database.

The Radeon supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM records no API compatibility in the database, with DirectX, OpenGL, and Vulkan all listed as N/A.

The Verdict

The data supports a clear split based on recorded specifications. The NVIDIA N1X 48SM holds large advantages in every raw throughput category: FP32 compute at 28.83 TFLOPS, texture rate at 900.9 GTexel/s, pixel rate at 112.6 GPixel/s, shading unit count at 6,144, and memory bandwidth at 273.2 GB/s. It also includes 192 tensor cores and 48 RT cores, features that the Radeon entry either lacks or lists in much smaller counts.

The AMD Radeon 840M holds advantages in boost clock at 2900 MHz, API compatibility with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and a lower power envelope at 15 W. Its 4 nm process node is smaller than the N1X 48SM's 5 nm node.

For workloads that depend on the recorded API support, the Radeon 840M is the only one of the two with listed compatibility. For workloads that depend on raw compute throughput, memory bandwidth, or tensor core execution, the N1X 48SM is the clear choice from the data.

Neither part has benchmark scores in the database, and both sit at the 50th percentile against all GPUs. The percentile values do not reflect measured performance differences. The specification record is the only basis for comparison.

The N1X 48SM targets a later release date of 2026-05-31, while the Radeon 840M is dated 2025-02-28. Both are listed as Active. The N1X 48SM uses a PCIe 5.0 x16 interface, which is a newer bus standard than the Radeon's PCIe 4.0 x8.

The N1X 48SM carries a 128 GB memory configuration with a fixed 273.2 GB/s bandwidth figure. The Radeon 840M uses system shared memory, so its bandwidth and capacity depend on the host system. That makes the N1X 48SM the part with a self-contained memory subsystem in the recorded data.

The Radeon 840M has a recorded TDP of 15 W, while the N1X 48SM's TDP is unknown. The Radeon's power figure is the only one available for comparison. Its lower boost clock at base and higher boost ceiling suggest a different frequency behavior, but without benchmark data the practical impact cannot be measured.

The verdict from the database is straightforward: the N1X 48SM is the stronger part on raw specifications, while the Radeon 840M is the part with documented API support and a lower power draw. Users dependent on DirectX, OpenGL, or Vulkan should note that the N1X 48SM lists no support for any of those APIs. Users dependent on compute density, memory bandwidth, or tensor operations should note the N1X 48SM's large recorded advantages.