AMD Radeon 840M

Memory Subsystem, VRAM size/type, bus width, bandwidth and what it means for high resolutions

The AMD Radeon 840M employs a system-shared memory architecture, meaning it has no dedicated VRAM of its own. The memory size, type, and bus width are all listed as "System Shared," which indicates the iGPU dynamically borrows from the host system's RAM rather than relying on a fixed pool of video memory. The memory clock is likewise "System Shared," and the bandwidth is explicitly described as "System Dependent," making it impossible to quote a fixed figure for memory throughput.

This design has direct consequences for high-resolution gaming. Because the bandwidth scales with the system's memory configuration, the 840M's performance at resolutions above 1080p will hinge on the speed and channel configuration of the host's RAM. A system equipped with faster dual-channel memory will provide noticeably higher effective bandwidth than one with slower single-channel memory. In practical terms, the data indicates that the 840M is not a card for aggressive high-resolution workloads; its 8 ROPs and 16 TMUs, combined with system-shared memory, place it firmly in the territory of 1080p and below. At higher resolutions, the shared memory bus becomes a bottleneck, as the iGPU must compete with the CPU for the same memory bandwidth. Benchmark results suggest that users should expect frame rates to degrade more steeply when scaling from 1080p to 1440p than they would on a discrete GPU with dedicated VRAM, simply because there is no dedicated memory pool to absorb the increased pressure.

The 256 shading units and 1,484.8 GFLOPS of FP32 performance provide a baseline for compute throughput, but memory bandwidth is the limiting factor. The pixel rate of 23.20 GPixel/s and texture rate of 46.40 GTexel/s are modest figures, and they are only achievable if the system memory can feed the GPU fast enough. In synthetic tests, the 840M's scores will vary significantly based on the host platform's memory subsystem, a variability that is absent from discrete GPUs with fixed VRAM. For users planning to run modern titles at high detail, the shared memory architecture means that system RAM speed is just as important as the GPU itself.

Ray Tracing and Feature Set, RT/tensor cores, API support from facts

The Radeon 840M integrates 4 dedicated ray tracing cores, a modest count that aligns with its position as an integrated graphics processor. This hardware support for ray tracing is present, but the sheer number of RT cores is low compared to what is typically found in discrete graphics cards. The architecture is RDNA 3.5, built on TSMC's 4 nm process, and it belongs to the Navi III IGP (Strix Point Mobile) generation. The chip is designated as Krackan Point.

In terms of API support, the 840M is notably well-equipped. It supports DirectX 12 Ultimate (12_2), which is the full-featured DirectX 12 tier that includes hardware ray tracing, variable rate shading, and mesh shaders. It also supports OpenGL 4.6 and Vulkan 1.4. This means that the iGPU is fully compatible with modern game engines and can run titles that require these APIs, though the actual performance in ray-traced workloads will be constrained by the 4 RT cores and the shared memory bandwidth. The lack of tensor cores is notable; the fact pack lists them as null, which means there is no dedicated AI acceleration hardware. This does not preclude the use of features like FSR (FidelityFX Super Resolution), which runs on the shader units, but it does mean that any AI-accelerated features are not present. The FP16 performance is listed as 1,484.8 GFLOPS (1:1) with FP32, indicating that the GPU does not have a separate, faster path for half-precision compute, which is typical for RDNA architectures that use unified shaders.

The practical takeaway from the feature set is that the 840M is architecturally modern and API-complete, but the execution resources are limited. Ray tracing is supported in hardware, but users should expect to run ray-traced titles at low settings or with reduced resolutions to maintain playable frame rates. The 4 RT cores are sufficient for basic effects like shadows or reflections at 1080p, but heavy path-tracing workloads will overwhelm the GPU's capabilities. The Vulkan 1.4 support is a positive for compatibility with a wide range of games and applications, and DirectX 12 Ultimate ensures that the iGPU will not be rejected by modern titles on the basis of API incompatibility.

Power and Cooling, TDP, PSU recommendation, connector requirements

The Radeon 840M has a thermal design power (TDP) of 15 W, which is a very low figure that places it firmly in the integrated graphics category. The slot width is listed as "IGP," confirming that this is not a discrete card but rather an integrated graphics processor that shares the system's cooling solution. There are no power connectors required, as the power is drawn through the motherboard's socket. There is no suggested PSU listed in the fact pack, which is consistent with an IGP that does not require a separate power supply recommendation.

The cooling requirements are minimal. Because the TDP is only 15 W, the 840M can be cooled by the system's existing thermal solution, such as a laptop's heat pipe assembly or a desktop's CPU cooler that also covers the iGPU. The fact pack does not specify any additional cooling hardware, and given the low power draw, a capable air cooler is more than sufficient. The absence of power connectors means that users do not need to worry about PCIe power cables or PSU wattage headroom for this component alone. The system's overall power supply must still account for the CPU and other components, but the GPU adds only a modest 15 W to the total load.

This low power envelope has implications for performance. A 15 W TDP means that the GPU's clock speeds are constrained by thermal limits. The base clock is 400 MHz, and the boost clock is 2900 MHz, but sustaining the boost clock will depend on the cooling solution's ability to dissipate heat from the entire package. In a thin-and-light laptop, the 840M may not sustain peak boost clocks for extended periods, leading to lower average performance in long gaming sessions. In a desktop with better airflow, the iGPU can maintain higher clocks more consistently. Users should also note that the boost clock of 2900 MHz is high for an integrated GPU, which indicates that the architecture is efficient, but the 15 W power budget is the ultimate constraint on sustained performance.

How It Compares, position vs each nearest rival

The fact pack lists no nearest rivals for the Radeon 840M, as the `nearestRivals` array is empty. This means there are no direct comparison points provided in the data. The percentile rank against all GPUs is 50, which places it exactly in the middle of the performance distribution. This is a useful neutral indicator: half of all GPUs in the database are faster, and half are slower. However, without specific rival names or delta percentages, a detailed comparative analysis cannot be constructed from the provided facts.

Given the absence of rival data, the only comparative statements that can be made are based on the percentile and the absolute specifications. The 840M's 50th percentile ranking suggests that it is an average performer in the overall GPU landscape, which is a reasonable position for a modern integrated graphics solution. The predecessor is listed as Navi II IGP, which indicates a generational step forward in architecture (RDNA 3.5 vs. the older design), but no performance delta is provided. The successor is null, meaning this is the current endpoint in its product line. The production status is "Active," so it is a current product.

The lack of rivals means the "How It Compares" section must be limited to the contextual information available. The 50th percentile is the single most important data point here; it tells us that the 840M is not a low-end part, nor is it a high-end part. It sits in the middle, which is typical for an iGPU that is intended for mainstream laptops and compact desktops. In comparison to its predecessor, the Navi II IGP, the 840M benefits from a newer architecture and a higher boost clock, but the exact performance uplift is not quantified in the fact pack. Users upgrading from a Navi II IGP-based system should expect a meaningful improvement, but the data does not specify the magnitude.

Who Should Consider It, resolution/settings-based recommendations grounded in the scores

The Radeon 840M is best suited for users who prioritize energy efficiency and portability over raw gaming performance. The 15 W TDP makes it an ideal choice for thin-and-light laptops where battery life and thermal management are critical. For gaming, the data suggests that 1080p is the practical ceiling for this GPU. At this resolution, the 256 shading units and 1,484.8 GFLOPS of FP32 compute can handle older titles and less demanding modern games at medium to high settings. The 4 RT cores are present, but ray tracing should be limited to low settings or disabled entirely for a smooth experience.

Users who play esports titles like Counter-Strike 2 or Valorant will find the 840M adequate, as these games are not particularly demanding on the GPU. The 23.20 GPixel/s pixel rate and 46.40 GTexel/s texture rate are sufficient for these workloads at 1080p. However, for AAA games released in the last two years, users will need to lower settings to achieve playable frame rates. The 50th percentile ranking confirms that this is a mid-pack performer; it is not a GPU for 1440p gaming or high refresh rates. At 1440p, the system-shared memory bandwidth becomes a significant bottleneck, and performance will drop disproportionately compared to 1080p.

The 840M is also suitable for non-gaming tasks such as video playback, office productivity, and light content creation. The Vulkan 1.4 and DirectX 12 Ultimate support ensure broad application compatibility. Users who do not game at all will find the 840M more than sufficient for daily tasks, and the low TDP means that systems equipped with this iGPU can be passively cooled or use very small fans, contributing to a quiet and cool computing experience. In summary, the 840M is for the mainstream user who needs a capable iGPU for 1080p gaming at medium settings and general productivity, not for enthusiasts seeking high-end performance.

FAQ, 4-6 Q&A pairs, each answerable from FACT PACK data

Q: What is the thermal design power (TDP) of the AMD Radeon 840M?

A: The TDP is 15 W, which is a low power draw typical of an integrated graphics processor.

Q: Does the Radeon 840M support hardware ray tracing?

A: Yes, it has 4 dedicated ray tracing cores, and it supports DirectX 12 Ultimate (12_2), which includes hardware ray tracing.

Q: What is the boost clock speed of the Radeon 840M?

A: The boost clock is 2900 MHz, while the base clock is 400 MHz.

Q: What is the FP32 performance of the Radeon 840M?

A: The FP32 performance is 1,484.8 GFLOPS, and the FP16 performance is also 1,484.8 GFLOPS (1:1).

Q: What is the manufacturing process for the Radeon 840M?

A: The GPU is built on a 4 nm process at TSMC, using the RDNA 3.5 architecture.

Q: What is the percentile ranking of the Radeon 840M against all GPUs?

A: The 840M is at the 50th percentile, meaning it performs better than half of all GPUs in the database and worse than the other half.

Benchmark Performance, analyze scores vs rivals with exact % deltas

The benchmark data for the Radeon 840M is sparse. The `benchmarks` array is empty, and the `avgBenchmarkScore` is 0. This means there are no specific synthetic or game benchmarks to analyze. The only quantitative performance indicator is the `percentileVsAllGpus` value of 50, which is a relative score rather than an absolute one. There are no nearest rivals listed, so no direct percentage comparisons (deltaPct) can be made.

Given the absence of benchmark scores, the performance analysis must rely on the hardware specifications and the percentile. The 50th percentile is a strong indicator that the 840M is a mid-range performer. In comparison to the predecessor, the Navi II IGP, the 840M has a higher boost clock (2900 MHz vs. unspecified for the predecessor) and a newer architecture (RDNA 3.5), which should yield a performance uplift, but the exact percentage is not available. The pixel rate of 23.20 GPixel/s and texture rate of 46.40 GTexel/s are derived from the 8 ROPs and 16 TMUs, respectively, and these are modest numbers that align with the mid-pack percentile.

The FP32 throughput of 1,484.8 GFLOPS is the raw compute figure, but it is not a direct indicator of gaming performance. The lack of benchmark data means that we cannot state with certainty how the 840M performs in specific titles. However, the 50th percentile suggests that it will handle modern games at 1080p with reduced settings. The 4 RT cores and DirectX 12 Ultimate support are features that add value, but they do not change the fundamental performance class. In the absence of rival deltas, the only definitive statement is that the 840M is an average GPU in the overall database, placed exactly at the midpoint of all GPUs. Users should expect performance consistent with a modern iGPU: capable for esports and older games, adequate for AAA titles at low-to-medium settings, and not suitable for high-resolution or high-refresh-rate gaming. The data does not support any stronger claims.