AMD Radeon 840M vs Intel Arc G3 Comparison

Head-to-Head Benchmarks

The benchmark database contains no recorded head-to-head measurements for the AMD Radeon 840M and Intel Arc G3. Both entries show zero benchmark scores, zero wins on either side, and no nearest rival comparisons. The absence of measured data means no direct performance delta can be established from the recorded information. What can be analyzed are the architectural and specification differences that would shape any future benchmark comparison.

The AMD Radeon 840M operates with a boost clock of 2900 MHz, while the Intel Arc G3 boosts to 2400 MHz. Clock speed alone does not determine performance, and the two designs differ substantially in compute resource allocation. The Radeon 840M carries 256 shading units, 16 texture mapping units, and 8 raster operation pipelines. The Arc G3 counters with 1280 shading units, 40 TMUs, and 20 ROPs. In raw throughput terms, the Arc G3 reaches 96.00 GTexel/s texture fill rate and 48.00 GPixel/s pixel rate, compared to 46.40 GTexel/s and 23.20 GPixel/s for the Radeon 840M. The Intel part doubles the pixel throughput and more than doubles texture throughput.

Floating point performance follows a similar pattern. The Arc G3 delivers 6.144 TFLOPS FP32, while the Radeon 840M produces 1,484.8 GFLOPS, a 4.1x difference in favor of Intel. FP16 computation shows an even wider split: the Arc G3 reaches 12.29 TFLOPS using a 2:1 rate, while the Radeon 840M maintains a 1:1 FP16 ratio at 1,484.8 GFLOPS. The Intel architecture's shader-heavy design clearly targets higher compute throughput, while the AMD part relies on a more modest execution resource pool.

The ray tracing hardware also differs. The Arc G3 includes 10 RT cores, while the Radeon 840M has 4. This does not automatically translate to a fixed performance ratio, as RT core efficiency varies by architecture, but the count difference indicates the Intel design dedicates more silicon to ray traversal workloads.

Both parts are integrated graphics processors with system-shared memory, making memory bandwidth dependent on the host platform rather than a fixed specification. Neither has a dedicated VRAM bus width or memory clock, so all memory-related performance is contingent on the surrounding system.

Where Each One Wins

Without recorded benchmark scores, the wins must be inferred from specification advantages rather than measured results.

The Intel Arc G3 wins on raw compute throughput. Its 1280 shading units give it a 5x unit count advantage over the Radeon 840M's 256. The 40 TMUs and 20 ROPs enable higher fill rates, and the 10 RT cores provide more ray tracing parallelism. For workloads that scale with shader count, such as high-resolution rasterization, compute-heavy effects, or ray-traced scenes, the Arc G3 holds a structural advantage. The 6.144 TFLOPS FP32 figure places it in a different compute class than the 1,484.8 GFLOPS Radeon part.

The AMD Radeon 840M wins on power efficiency and clock speed. Its 15 W TDP is 10 W lower than the Arc G3's 25 W, and its 2900 MHz boost clock is 500 MHz higher. For thermally constrained portable devices, the lower TDP allows sustained operation in thinner chassis with less cooling demand. The higher boost clock suggests the AMD design can reach higher instantaneous frequencies when power and thermal headroom allow, which may benefit lightly threaded or latency-sensitive tasks.

The Arc G3 wins on architectural generation in one respect: it uses a 3 nm process node from Intel, while the Radeon 840M uses TSMC's 4 nm node. The smaller node typically enables higher transistor density and better power efficiency at equivalent complexity, though the actual power envelope here favors AMD.

The Radeon 840M wins on release timing maturity. Its release date is recorded as February 28, 2025, while the Arc G3 is dated May 31, 2026. The AMD part has been in the field for over a year longer, which may translate to more mature driver validation across a broader range of software in the database's historical records.

For memory-bound scenarios, neither part holds a clear advantage, as both use system-shared memory with bandwidth described as system dependent. The winner in practice would be determined by the host platform's memory configuration, not the GPU itself.

FAQ

Q: Which GPU has a higher boost clock?

A: The AMD Radeon 840M boosts to 2900 MHz, which is 500 MHz higher than the Intel Arc G3's 2400 MHz boost clock.

Q: How do the two compare in FP32 compute performance?

A: The Intel Arc G3 delivers 6.144 TFLOPS FP32, approximately 4.1 times the 1,484.8 GFLOPS of the AMD Radeon 840M.

Q: What is the TDP difference between the two?

A: The Radeon 840M has a 15 W TDP, while the Arc G3 has a 25 W TDP, a 10 W difference in favor of the AMD part.

Q: Do both support the same graphics APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which has more ray tracing cores?

A: The Intel Arc G3 has 10 RT cores, compared to 4 RT cores on the AMD Radeon 840M.

Q: What process nodes do the two use?

A: The Radeon 840M uses a 4 nm TSMC process, while the Arc G3 uses Intel's 3 nm process.

Specification Differences

The two parts differ across nearly every measurable specification.

Clocks: the Radeon 840M runs at 400 MHz base and 2900 MHz boost. The Arc G3 runs at 300 MHz base and 2400 MHz boost. Both use system-shared memory with no dedicated memory clock.

Compute units: the Radeon 840M has 256 shading units, 16 TMUs, 8 ROPs, and 4 RT cores. The Arc G3 has 1280 shading units, 40 TMUs, 20 ROPs, and 10 RT cores.

Fill rates: the Radeon 840M produces 23.20 GPixel/s and 46.40 GTexel/s. The Arc G3 produces 48.00 GPixel/s and 96.00 GTexel/s.

Floating point: the Radeon 840M delivers 1,484.8 GFLOPS FP32 and 1,484.8 GFLOPS FP16 at a 1:1 ratio. The Arc G3 delivers 6.144 TFLOPS FP32 and 12.29 TFLOPS FP16 at a 2:1 ratio.

Power: the Radeon 840M has a 15 W TDP. The Arc G3 has a 25 W TDP.

Bus interface: the Radeon 840M uses PCIe 4.0 x8. The Arc G3 is listed simply as IGP.

Process node: the Radeon 840M uses TSMC 4 nm. The Arc G3 uses Intel 3 nm.

Release date: the Radeon 840M is dated February 28, 2025. The Arc G3 is dated May 31, 2026.

The two share several characteristics: both are IGPs with no power connectors, both have portable-device-dependent display outputs, both use system-shared memory, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and neither has a launch MSRP recorded in the database.

Architecture Differences

The AMD Radeon 840M is built on the RDNA 3.5 architecture, part of the Navi III IGP generation for Strix Point Mobile, and uses the Krackan Point chip. The Intel Arc G3 uses the Xe3-LPG architecture, part of the Arc Graphics-M generation for Panther Lake, and uses the Panther Lake chip.

The process node difference is notable: AMD uses a 4 nm TSMC process, while Intel uses a 3 nm process from its own foundry. This gives the Intel part a potential density and efficiency advantage at the transistor level, though the actual TDP figures show AMD operating at lower power.

Shader organization differs fundamentally between the two architectures. RDNA 3.5 uses a workgroup processor design where the 256 shading units are organized into compute units with shared resources. Xe3-LPG uses Intel's Xe-core layout with 1280 shading units arranged across multiple Xe cores, each with dedicated vector engines and ray tracing units. The 10 RT cores in the Arc G3 versus the 4 in the Radeon 840M reflects this architectural difference in how ray traversal hardware is distributed.

FP16 processing differs. The Radeon 840M executes FP16 at a 1:1 ratio with FP32, meaning the same throughput for both formats. The Arc G3 executes FP16 at a 2:1 ratio, doubling throughput for FP16 workloads relative to FP32. This makes the Intel part more efficient for machine learning inference or compute workloads that use reduced precision.

The bus interface differs. The Radeon 840M connects via PCIe 4.0 x8, providing a dedicated link to the host processor. The Arc G3 is listed simply as IGP, suggesting a direct integrated connection without a specified PCIe lane count. In practice, both rely on system memory for all data, so the effective bandwidth depends on the host platform's memory subsystem.

Both architectures target the same API feature set: DirectX 12 Ultimate with the 12_2 feature level, OpenGL 4.6, and Vulkan 1.4. This means both support hardware ray tracing, mesh shaders, and variable rate shading at the API level. The actual implementation quality and feature support within those APIs would vary by driver and hardware design, but the recorded API compatibility is identical.

The Radeon 840M has a listed predecessor, Navi II IGP, while the Arc G3 has no predecessor recorded. The Radeon 840M's generation is described as Navi III IGP (Strix Point Mobile), indicating it is the third Navi IGP iteration. The Arc G3's generation is Arc Graphics-M (Panther Lake), a first-generation product in that specific line with no direct predecessor in the database.

Neither part has recorded transistor counts, die sizes, or transistor density values, so architectural complexity cannot be compared on those metrics. The database also records no benchmark entries for either GPU, leaving the performance relationship between these two architectures entirely dependent on the specification analysis presented here.