Intel Iris Plus Graphics 655 Mobile

The Intel Iris Plus Graphics 655 Mobile is an integrated graphics solution from Intel, built on the Coffee Lake GT3e chip and Generation 9.5 architecture. Manufactured on a 14 nm+++ process, this GPU is designed for mobile platforms, as indicated by its 15 W TDP and IGP slot width. The hardware configuration includes 384 shading units, 48 texture mapping units, and 6 ROPs, with base and boost clocks of 300 MHz and 1050 MHz respectively. The product is listed as end-of-life, with a release date of April 2, 2018, and no launch MSRP is provided. The data shows that it holds a 50th percentile position among all GPUs in the database, though its average benchmark score is zero, indicating no recorded performance measurements.

Benchmark Performance

The absence of any benchmark entries—the average benchmark score is 0—means that real-world performance numbers are not available. Instead, the analysis must rely on the theoretical throughput values derived from the hardware specifications. The FP32 compute output is 806.4 GFLOPS, which is calculated from the 384 shading units at the boost clock of 1050 MHz. This figure is modest by modern standards, but the 50th percentile ranking suggests that, in the context of all GPUs in the database, it sits exactly at the median. The zero benchmark score, however, implies that this percentile may be based on hardware characteristics rather than measured results. The FP16 performance of 1.613 TFLOPS is achieved at a 2:1 ratio, meaning that the GPU can double its throughput when working with half-precision data. This can be beneficial for compute tasks that tolerate reduced precision, such as certain machine learning inference workloads, though the lack of tensor cores limits specialized acceleration. The pixel fill rate of 6.300 GPixel/s is constrained by the 6 ROPs, while the texture rate of 50.40 GTexel/s is determined by the 48 TMUs. These rates are indicative of a GPU intended for basic 3D rendering, light gaming at low resolutions, and general desktop composition. In practical terms, the GPU will handle everyday tasks with ease, but demanding games or professional 3D applications will likely strain its capabilities.

Memory Subsystem

The memory subsystem of the Intel Iris Plus Graphics 655 Mobile is entirely dependent on the host system. The GPU has no dedicated VRAM; the memory size, type, and bus width are all listed as "System Shared." This means that the GPU borrows from the system's main memory, and the effective bandwidth is "System Dependent." Consequently, the performance of the GPU in memory-intensive scenarios—such as high-resolution texture loading or large frame buffers—varies significantly based on the platform's memory configuration. For example, a system with dual-channel high-speed memory will provide more bandwidth than a single-channel configuration, but the data does not specify any particular memory speeds or channel counts. The lack of a dedicated memory bus also means that the GPU competes with the CPU for memory access, which can introduce latency and reduce overall throughput. At high resolutions, the absence of a high-bandwidth dedicated memory pool becomes a bottleneck, as the system memory bandwidth is typically lower than that of discrete GPUs. The data does not provide any specific bandwidth numbers, so a quantitative assessment is not possible; however, the qualitative implication is clear: the GPU's memory performance is unpredictable and heavily tied to the rest of the system.

Ray Tracing and Feature Set

The feature set of this GPU is defined by the absence of dedicated ray tracing and tensor cores. Both rtCores and tensorCores are listed as null, meaning there is no hardware acceleration for ray tracing or tensor-based operations. This is consistent with the integrated nature of the GPU and its generation. However, the GPU does support a range of modern APIs: DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. These APIs provide access to modern rendering techniques, but the specific capabilities are not detailed in the data. The lack of tensor cores means that any AI-accelerated features would have to rely on the general-purpose compute shaders, which are limited by the FP32 throughput of 806.4 GFLOPS. The FP16 throughput of 1.613 TFLOPS at a 2:1 ratio offers some additional compute headroom for half-precision workloads, but without specialized hardware, the performance for such tasks is expected to be modest. In summary, the feature set is focused on traditional rasterization and general compute, with no support for hardware-accelerated ray tracing or AI-specific functions.

Power and Cooling

The power profile of the Intel Iris Plus Graphics 655 Mobile is defined by its 15 W TDP. This is a low power envelope, typical for an integrated GPU in a mobile processor. The slot width is listed as "IGP," confirming that it is an integrated graphics processor that does not occupy a discrete expansion slot. No power connectors are listed, and no suggested PSU is provided, which is expected because the GPU draws its power from the CPU package and the motherboard's power delivery system. The low TDP means that cooling requirements are minimal; a standard laptop thermal solution is sufficient to dissipate the heat generated. The 14 nm+++ process node contributes to the efficiency, though the GPU is now end-of-life. The lack of a dedicated cooling solution or power connector also means that this GPU is not upgradeable or replaceable; it is permanently integrated into the system. The data does not include any temperature or noise figures, but the low TDP suggests that the GPU will not produce excessive heat.

How It Compares

The data lists no nearest rivals for this GPU, so a direct comparison to specific competing products is not possible. The only positional data available is the percentile of 50 among all GPUs in the database. This indicates that the GPU sits exactly at the median of the distribution, meaning half of all GPUs are faster and half are slower. However, the average benchmark score of 0 complicates this interpretation; it is likely that the percentile is derived from the hardware specifications rather than actual performance tests. In the context of its own generation, the GPU is part of the HD Graphics-M (Coffee Lake) family, which is designed for mobile processors. Its 384 shading units and 15 W TDP place it in the entry-level segment of integrated graphics. The end-of-life status suggests that Intel has moved on to newer architectures, and the release date of April 2, 2018, indicates that this is a relatively old product. Without rival data, the most accurate statement is that the GPU occupies a middle position in the overall database, but its actual performance is not quantified. The theoretical throughput figures—806.4 GFLOPS FP32 and 6.300 GPixel/s pixel rate—provide a baseline for understanding its capabilities, but they cannot be directly compared to any named competitor.

FAQ

Q: What is the base clock of the Intel Iris Plus Graphics 655 Mobile?

A: The base clock is 300 MHz, with a boost clock of 1050 MHz.

Q: Does this GPU have dedicated ray tracing hardware?

A: No. The data lists rtCores as null, so there is no hardware ray tracing support.

Q: What is the TDP of this integrated GPU?

A: The TDP is 15 W.

Q: Which graphics APIs are supported?

A: It supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3.

Q: How much dedicated VRAM does it have?

A: It has no dedicated VRAM; the memory size, type, and bus width are all listed as "System Shared."

Q: What is the production status of this GPU?

A: It is end-of-life, with a release date of April 2, 2018.