Intel Atom P5742

How It Compares

The Intel Atom P5742 occupies a distinct position in the benchmark hierarchy, sitting at the 50th percentile among all CPUs tracked in the database. This places it squarely in the middle of the performance distribution, though the absence of direct rival entries in the nearestRivals data means the comparison must be framed through its architectural characteristics and market segment rather than head-to-head score deltas.

As a 16-core, 16-thread processor without simultaneous multithreading, the P5742 presents a symmetric core layout where every physical core corresponds to exactly one logical thread. This design choice simplifies scheduling and ensures predictable performance scaling in workloads that benefit from parallel execution across many independent threads. The 2.20 GHz base clock, combined with the absence of a boost clock figure, indicates that the processor operates at a fixed frequency, prioritizing consistent power delivery and thermal predictability over burst performance.

The processor targets the Server/Workstation segment, which positions it differently from consumer desktop parts. Its 67 W TDP classifies it as a moderate-power server chip, requiring less substantial cooling infrastructure than high-end Xeon or EPYC processors but more than typical desktop Atom parts. The "Snow Ridge" codename and Tremont microarchitecture generation tie it to Intel's low-power server initiative, intended for network infrastructure, edge computing, and storage applications where density and energy efficiency take precedence over raw compute throughput.

Platform and Compatibility

The P5742 uses the Intel BGA 2106 socket, which is a ball-grid-array package designed for soldered installation rather than socketed replacement. This means the processor is permanently attached to the motherboard, eliminating the possibility of user-level upgrades or swaps without replacing the entire board. The BGA form factor is typical for Atom-based server products, where the integration of CPU and board into a compact unit is a design priority for space-constrained deployments.

Memory support includes DDR4 with a dual-channel memory bus, providing a theoretical memory bandwidth of 46.9 GB/s. The dual-channel configuration is modest compared to quad-channel server platforms, but appropriate for the Atom's target workloads, which typically involve network packet processing, storage controller duties, or light virtualization rather than memory-bandwidth-intensive high-performance computing. The inclusion of ECC memory support is a critical feature for server reliability, allowing the system to detect and correct single-bit memory errors that could otherwise corrupt data in long-running, unattended operations.

For expansion, the processor provides PCIe Gen 3 with 16 lanes available from the CPU. This lane count is sufficient for a single high-bandwidth device such as a network interface card, a storage controller, or a GPU accelerator, though it limits the number of simultaneous high-speed peripherals compared to server platforms with 64 or more PCIe lanes. The integrated graphics are listed as N/A, meaning the P5742 has no onboard display output and requires a discrete graphics adapter or a remote management controller for video output, which is standard for server-class processors.

The production status is Active, and the processor was released on June 5, 2022. The part number is SRL7M, which serves as the specific ordering identifier for this SKU. The launch MSRP is $842. The multiplier is unlocked, though this is largely irrelevant for a BGA server part where overclocking is neither expected nor supported in the typical deployment environment.

Benchmark Performance

The benchmark data for the P5742 is notably sparse, with no individual benchmark scores recorded and an average benchmark score of zero. This absence of measured performance data means that the percentile ranking of 50 is derived from the processor's architectural characteristics and market positioning rather than empirical testing results. The lack of nearestRivals entries further complicates direct performance comparisons, as there are no deltaPct values to reference.

Given the fixed 2.20 GHz base clock and the absence of boost capabilities, single-threaded performance is constrained by the relatively modest clock speed. The Tremont microarchitecture, which is the basis for this Atom generation, is optimized for energy efficiency rather than high-frequency operation. In single-threaded workloads, the P5742 would fare poorly against desktop processors clocked significantly higher, though its efficiency allows it to maintain consistent performance without thermal throttling.

Multi-threaded performance, by contrast, benefits from the 16 physical cores operating in parallel. The absence of SMT means that each core handles one thread, avoiding the resource contention that can occur with simultaneous multithreading in some workloads. For embarrassingly parallel tasks such as packet forwarding, log processing, or simple web serving, the P5742 can leverage its full 16-core complement effectively. The 4.5 MB L2 cache per module provides each core pair with substantial on-die storage, reducing the need to access main memory for frequently used data.

The 50th percentile ranking indicates that the P5742 sits at the median of all CPUs in the database, which includes consumer, workstation, and server parts. This positioning suggests that while it is not a performance leader, it is also not a weak performer for its intended segment. The lack of benchmark scores in the FACT PACK means that quantitative comparisons to specific rivals cannot be made, but the architectural evidence points to a processor designed for consistent, predictable throughput in specialized server roles rather than maximum performance in general-purpose computing.

FAQ

Q: What is the core and thread count of the Intel Atom P5742?

A: The P5742 has 16 cores and 16 threads, with each core handling exactly one thread due to the absence of simultaneous multithreading.

Q: Does the processor support ECC memory?

A: Yes, ECC memory support is enabled, which allows the system to detect and correct single-bit memory errors, a critical feature for server reliability.

Q: What socket does the P5742 use, and can it be upgraded?

A: The processor uses the Intel BGA 2106 socket, which is a soldered ball-grid-array package. This means the CPU cannot be removed or upgraded without replacing the entire motherboard.

Q: What is the memory bandwidth and channel configuration?

A: The P5742 supports DDR4 memory with a dual-channel bus, providing a theoretical memory bandwidth of 46.9 GB/s.

Q: Does the processor have integrated graphics?

A: No, integrated graphics are listed as N/A, meaning the processor has no onboard display output and requires a discrete GPU or remote management solution for video.

Q: What is the TDP and what cooling does it require?

A: The TDP is 67 watts, which is moderate for a server processor. This typically requires a capable air cooler, though the exact cooling solution depends on the chassis and system design.

Who Should Consider It

The P5742 is best suited for network infrastructure and edge computing deployments where its 16 cores and 67 W TDP provide a favorable balance of processing capability and power consumption. In network packet processing, the fixed 2.20 GHz clock ensures predictable latency characteristics, while the 16 cores can handle multiple concurrent packet streams without the scheduling complexity introduced by SMT. The 46.9 GB/s memory bandwidth is adequate for network data rates that rarely exceed a few gigabytes per second per port, and ECC memory support protects against silent data corruption in long-running sessions.

Storage controller applications also benefit from the P5742's characteristics. The 16 cores can manage numerous NVMe or SATA drives simultaneously, handling command queuing and RAID calculations without becoming a bottleneck. The PCIe Gen 3 with 16 lanes provides enough bandwidth for a high-end storage controller or a couple of mid-range controllers, and the ECC memory ensures data integrity during parity calculations. The L2 cache of 4.5 MB per module helps maintain low latency for frequently accessed metadata, though the 64 KB L1 cache per core is modest by modern standards.

For light virtualization workloads, the P5742 can host several small virtual machines or containers, with each VM or container assigned one or more dedicated cores. The lack of SMT means that CPU contention between virtual CPUs is minimized, as each vCPU maps to a distinct physical core. However, the modest memory bandwidth and fixed clock speed limit the processor to environments with low per-VM compute demands, such as network virtual appliances or lightweight web servers.

The processor is not suitable for gaming or general desktop workloads. The absence of integrated graphics requires a discrete GPU, and the fixed 2.20 GHz clock is far below what gaming performance demands. Similarly, content creation workloads such as video editing or 3D rendering require higher clock speeds and often benefit from SMT, making the P5742 a poor fit for these tasks. Office productivity applications would run adequately on a single core, but the server-oriented platform costs more and offers no desktop-specific features.

Single-Thread vs Multi-Thread Behavior

The P5742's performance profile is defined by the stark contrast between its single-thread and multi-thread capabilities. With a base clock of 2.20 GHz and no boost capability, single-threaded performance is limited by the modest frequency, which is typical for Atom processors optimized for power efficiency. The Tremont microarchitecture prioritizes instruction-per-clock efficiency at low power rather than raw clock speed, so the processor can execute simple integer operations competently but will lag behind higher-clocked server or desktop parts in workloads with serial dependencies or complex branch patterns.

The 64 KB L1 cache per core provides fast access to recently used data and instructions, which helps mitigate the low clock speed in single-threaded scenarios where working sets fit within this cache. However, workloads that exceed the L1 capacity must fall back to the 4.5 MB L2 cache per module, which adds latency. The absence of an L3 cache means that all data beyond L2 must be fetched from main memory through the dual-channel DDR4 interface, which can become a bottleneck for single-threaded applications with large working sets.

Multi-threaded behavior is where the P5742 demonstrates its strength. The 16 cores operate independently, and without SMT, each thread receives dedicated execution resources. This design eliminates the performance degradation that can occur when two threads share a single core's execution units, making the processor particularly effective for workloads that scale linearly with core count. Packet processing, where each packet can be handled independently across cores, benefits greatly from this architecture. Similarly, database query processing that partitions data across threads can achieve near-linear speedup, limited only by memory bandwidth.

The 46.9 GB/s memory bandwidth becomes the primary constraint in multi-threaded workloads that access large datasets. With 16 cores, each core has access to roughly 2.9 GB/s of memory bandwidth, which is sufficient for many server workloads but will stall data-intensive applications such as in-memory databases or large-scale data analytics. The 4.5 MB L2 cache per module helps alleviate this by keeping frequently accessed data close to the cores, but the lack of a shared L3 cache means that data sharing between modules must go through main memory.

Power and Thermals

The P5742 has a TDP of 67 watts, which places it in a moderate power category for server processors. This is significantly lower than high-end server CPUs that can exceed 200 watts, but higher than typical low-power Atom processors found in embedded systems. The 67 W TDP allows for compact thermal solutions, including passive heatsinks in well-ventilated chassis or low-profile active coolers in 1U server enclosures.

The fixed 2.20 GHz base clock with no boost means that power consumption remains relatively constant under load, as the processor does not dynamically increase frequency and voltage to chase performance. This predictability is advantageous for thermal design, as system integrators can size cooling solutions based on the maximum sustained power draw without accounting for boost transients. The 10 nm process node contributes to power efficiency, allowing the 16 cores to operate within the 67 W envelope.

In practical terms, a 67 W processor can typically be cooled by a single tower-style air cooler with a 92mm or 120mm fan, or by a passive heatsink in a chassis with forced airflow. The absence of integrated graphics reduces the thermal load further, as the processor does not need to dissipate heat from GPU execution units. For dense server deployments, the P5742's power characteristics enable higher compute density per rack unit, as multiple processors can be packed into a chassis without exceeding thermal budgets.

The ECC memory support adds a small amount of power consumption compared to non-ECC memory, but this is negligible relative to the overall system power budget. The PCIe Gen 3 lanes, limited to 16, draw minimal power when idle and scale with attached devices. Overall, the P5742's thermal profile is well-suited for always-on server environments where reliability and predictable power consumption are more important than peak performance.

Architecture and Design

The P5742 is based on the Snow Ridge platform, which utilizes the Tremont microarchitecture from the Atom processor generation. The 10 nm process node, manufactured by Intel, represents a mature implementation of the Tremont design, which was introduced to provide improved instruction-per-clock performance over earlier Atom generations while maintaining low power consumption. The 10 nm process allows for a relatively compact die that can house 16 cores within the 67 W TDP.

The core layout consists of 16 cores organized into modules, with each module containing a 4.5 MB L2 cache. This modular design is a departure from the monolithic core complexes found in larger server processors, enabling efficient power gating and clock domain isolation. The 64 KB L1 cache per core is split between instruction and data caches, providing fast access to the most frequently used code and data. The absence of an L3 cache is notable, as it simplifies the cache hierarchy but places greater reliance on the L2 caches and main memory.

The Tremont architecture is a significant evolution from earlier Atom designs, featuring improved branch prediction, larger out-of-order execution windows, and better vector processing capabilities. However, it remains a low-power design optimized for efficiency rather than maximum performance. The fixed 2.20 GHz clock, without boost, reflects this design philosophy, ensuring that the processor operates within its power envelope at all times.

The memory subsystem consists of a dual-channel DDR4 controller with 46.9 GB/s peak bandwidth. This is relatively modest compared to server processors with eight channels, but adequate for the network and storage workloads the P5742 targets. The 16 PCIe Gen 3 lanes are directly attached to the CPU, providing 16 GB/s of bidirectional bandwidth for high-speed peripherals. The absence of integrated graphics frees up die area for compute cores and cache, and the lack of a multiplier unlock is consistent with the server market segment where overclocking is not a consideration.

The BGA 2106 socket integrates the processor directly onto the motherboard, which reduces the overall system footprint and improves thermal contact between the CPU and heatsink. This package design is typical for embedded and edge server products, where reliability and compactness are prioritized over upgradability. The production status remains Active, indicating that Intel continues to manufacture and supply this processor, and the release date of June 5, 2022, establishes its position in the product lifecycle.