AMD Radeon 840M vs Intel Arc 140T Mobile Comparison

FAQ

Q: What are the fundamental differences between the AMD Radeon 840M and the Intel Arc 140T Mobile?

A: The AMD Radeon 840M uses the RDNA 3.5 architecture on a 4 nm TSMC process, while the Intel Arc 140T Mobile uses the Xe-LPG+ architecture on a 5 nm TSMC process. The Intel part is from the Arc Graphics-M (Arrow Lake) generation, whereas the AMD chip belongs to the Navi III IGP (Strix Point Mobile) generation.

Q: How do the clock speeds compare between these two integrated GPUs?

A: The AMD Radeon 840M has a base clock of 400 MHz and a boost clock of 2900 MHz. The Intel Arc 140T Mobile has a lower base clock of 300 MHz and a lower boost clock of 2350 MHz.

Q: Which GPU has the higher thermal design power (TDP)?

A: The Intel Arc 140T Mobile has a TDP of 35 W, while the AMD Radeon 840M has a TDP of 15 W. This indicates the Intel solution is designed to draw more power and potentially deliver higher performance.

Q: What are the DirectX and Vulkan API support levels for both GPUs?

A: Both the AMD Radeon 840M and the Intel Arc 140T Mobile support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, providing identical modern API feature sets.

Q: When were these GPUs released?

A: The Intel Arc 140T Mobile was released on 2025-01-12, and the AMD Radeon 840M was released on 2025-02-28.

Q: What are the memory configurations for these integrated GPUs?

A: Both GPUs use System Shared memory, meaning they rely on the host system's RAM. The memory bus width and type are also System Shared for both, with bandwidth listed as System Dependent.

Architecture Differences

The AMD Radeon 840M and Intel Arc 140T Mobile represent two different approaches to integrated graphics built on advanced process nodes. The Radeon 840M is fabricated by TSMC on a 4 nm process, while the Arc 140T uses TSMC's 5 nm process. Both are classified as IGP (integrated graphics processor) slot width, but their underlying designs diverge substantially.

The Radeon 840M is built on the RDNA 3.5 architecture, part of the Navi III IGP generation from the Strix Point Mobile family. It uses the Krackan Point chip. In contrast, the Intel Arc 140T Mobile employs the Xe-LPG+ architecture, from the Arc Graphics-M (Arrow Lake) generation, using the Arrow Lake-H chip. The predecessor to the Radeon 840M is listed as Navi II IGP, while the Arc 140T's predecessor is HD Graphics-M.

The compute unit counts reveal a major structural gap. The Radeon 840M has 256 shading units, 16 texture mapping units (TMUs), and 8 render output units (ROPs). The Arc 140T Mobile has 1024 shading units, 64 TMUs, and 32 ROPs, exactly four times the AMD configuration in each category. This suggests the Intel design is fundamentally larger in terms of raw processing resources.

Ray tracing hardware also differs: the Radeon 840M has 4 RT cores, while the Arc 140T has 8 RT cores. Both GPUs lack dedicated tensor cores according to the database records. The bus interface differs as well, with the AMD part using PCIe 4.0 x8, while the Intel part is listed simply as IGP.

Where Each One Wins

The benchmark data indicates a clear performance hierarchy based on the sheer difference in shading units and clock behavior. The Intel Arc 140T Mobile, with its boost clock of 2350 MHz and 1024 shading units, should deliver substantially higher raw throughput compared to the Radeon 840M's 2900 MHz boost across only 256 shading units. The fill rate figures confirm this: the Arc 140T achieves a pixel rate of 75.20 GPixel/s versus 23.20 GPixel/s for the Radeon 840M, and a texture rate of 150.4 GTexel/s versus 46.40 GTexel/s.

The Radeon 840M may win in scenarios where power efficiency is prioritized, as its 15 W TDP is significantly lower than the Arc 140T's 35 W TDP. Systems with limited thermal headroom or smaller batteries could favor the AMD solution. The Radeon 840M also has a higher boost clock relative to its base, suggesting a wider dynamic range for power management.

For raw compute workloads, the Arc 140T's FP32 performance of 4.813 TFLOPS dwarfs the Radeon 840M's 1,484.8 GFLOPS. In FP16, the Intel part reaches 9.626 TFLOPS with a 2:1 ratio, while the AMD part delivers 1,484.8 GFLOPS at a 1:1 ratio. This makes the Arc 140T clearly suited for compute-heavy tasks such as rendering or machine learning inference, whereas the Radeon 840M may suffice for lighter multimedia workloads.

Specification Differences

The two GPUs differ in several key specification fields. The AMD Radeon 840M has a base clock of 400 MHz and a boost clock of 2900 MHz. The Intel Arc 140T Mobile has a base clock of 300 MHz and a boost clock of 2350 MHz. The process node differs, with AMD using 4 nm and Intel using 5 nm, both from TSMC.

The shading unit count is 256 for AMD versus 1024 for Intel. TMUs are 16 versus 64, and ROPs are 8 versus 32. RT cores are 4 versus 8. The pixel rate is 23.20 GPixel/s for AMD versus 75.20 GPixel/s for Intel. Texture rate is 46.40 GTexel/s versus 150.4 GTexel/s. FP32 performance is 1,484.8 GFLOPS versus 4.813 TFLOPS. FP16 performance is 1,484.8 GFLOPS (1:1) versus 9.626 TFLOPS (2:1).

The TDP is 15 W for AMD and 35 W for Intel. The bus interface is PCIe 4.0 x8 for AMD and IGP for Intel. Both share the same API support: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both have System Shared memory and Portable Device Dependent display outputs. The release dates differ, with Intel launching on 2025-01-12 and AMD on 2025-02-28.

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark scores in the database, and the average benchmark score for both entries is 0 with no wins recorded for either side. However, the theoretical specifications provide a clear basis for comparison in several categories.

The most significant performance gap appears in shading throughput. The Intel Arc 140T Mobile's FP32 output of 4.813 TFLOPS is more than three times the AMD Radeon 840M's 1,484.8 GFLOPS. In FP16, the Intel part reaches 9.626 TFLOPS, which is over six times the AMD's FP16 figure. This indicates that for workloads leveraging FP16, such as certain AI inferencing or graphics shaders, the Intel GPU holds an overwhelming advantage.

Fill rate figures reinforce the Intel dominance. The Arc 140T's pixel rate of 75.20 GPixel/s is roughly 3.2 times the Radeon 840M's 23.20 GPixel/s. The texture rate of 150.4 GTexel/s is also roughly 3.2 times the AMD's 46.40 GTexel/s. These numbers suggest the Intel GPU can drive higher resolutions and more complex texture sampling without bottlenecking.

Clock speeds tell a more nuanced story. The Radeon 840M has a boost clock of 2900 MHz, which is 550 MHz higher than the Arc 140T's 2350 MHz boost. Despite this higher clock, the AMD part's smaller execution resource pool limits its total throughput. The AMD's base clock of 400 MHz is also 100 MHz higher than Intel's 300 MHz base, but sustained performance under load depends on boost behavior and thermal limits.

The TDP difference of 20 W between the two parts implies that the Intel Arc 140T Mobile is expected to sustain higher performance levels at the cost of greater power consumption. The Radeon 840M's 15 W TDP suggests it may be better suited for passively cooled or low-power designs, whereas the Arc 140T may require more robust cooling solutions within a laptop chassis.

The Verdict

The data indicates that the Intel Arc 140T Mobile is the significantly more powerful GPU across nearly every measured specification. Its 1024 shading units, 64 TMUs, and 32 ROPs provide a four-fold increase in execution resources compared to the AMD Radeon 840M. The FP32 performance difference, 4.813 TFLOPS versus 1,484.8 GFLOPS, confirms that the Intel part delivers more than three times the raw compute throughput. The pixel rate and texture rate advantages are consistent, both showing roughly 3.2 times the performance of the AMD part.

The AMD Radeon 840M does retain advantages in specific areas. Its 2900 MHz boost clock is higher than the Intel's 2350 MHz, and its 15 W TDP is less than half of the Intel's 35 W TDP. For systems where power consumption and thermal output are the primary constraints, the Radeon 840M offers a lighter-weight solution. Its 4 nm process node, compared to Intel's 5 nm, may also contribute to better efficiency per clock.

The choice between these two GPUs hinges on the intended use case. For users requiring maximum integrated graphics performance for gaming, rendering, or compute tasks, the Intel Arc 140T Mobile is the clear selection based on the recorded data. Its higher TDP and larger execution resources translate directly into higher fill rates and compute throughput. For users prioritizing battery life, lightweight design, or lower thermal output, the AMD Radeon 840M presents a more power-conscious alternative, though with substantially reduced performance ceilings.

Both GPUs share identical API support, including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so software compatibility is not a differentiating factor. The release timing shows Intel shipping its part earlier in January 2025, with AMD following in February 2025. The database records both as Active production status, indicating ongoing availability.

The absence of direct benchmark scores in the database leaves the theoretical specifications as the primary comparison metric. These specifications overwhelmingly favor the Intel Arc 140T Mobile for raw performance, while the AMD Radeon 840M offers a more power-efficient footprint. The percentile ranking for both GPUs is 50, placing them in the middle of the database's overall GPU distribution, though this ranking does not account for the substantial internal differences between these two specific parts.