Intel Pentium III 1133S

The Intel Pentium III 1133S is a single-core desktop processor from Intel’s P6 architecture family, built on the Tualatin core at a 130 nm process node. With a base clock of 1133.00 MHz, one core, and one thread, this chip sits exactly at the 50th percentile among all CPUs in the database, positioning it as a middle-of-the-road part in historical terms. Its 512 KB L2 cache and 8 KB L1 cache are modest by modern standards, and the part carries a 29 W thermal design power. This analysis draws solely from the provided data to outline where this processor fits, who should consider it, and how it behaves relative to the field.

Who Should Consider It

Given its single-core, single-thread design and 1133.00 MHz clock, the Pentium III 1133S is suited only for legacy software environments that are equally limited in parallelism. Workloads that rely on a single execution thread and do not require multiple cores will see the full benefit of this processor’s clock speed, but any application that scales across threads will immediately expose the hardware’s limitation of one thread. For basic office tasks such as word processing, spreadsheet manipulation, and email, the chip is adequate, provided the software version is from the same era. The 50th percentile ranking against all CPUs suggests that for purely single-threaded legacy benchmarks, this processor performs exactly in the middle of the historical distribution — meaning it is neither a standout nor a laggard for its time.

Gaming is not a recommended workload for this part, as the single core and single thread will bottleneck even early 3D titles that were starting to use multiple threads by the early 2000s. Creation workloads such as video editing, 3D rendering, or audio production are also poor fits; these tasks are inherently multi-threaded and would see no benefit from the 1133S’s single execution path. The chip is best viewed as a drop-in replacement for an aging system running single-threaded legacy applications, where its 1133.00 MHz clock can still drive a responsive interface. The absence of any boost clock means performance is fixed at the base frequency, so there is no headroom for bursty workloads that might otherwise benefit from a temporary frequency increase.

The integrated graphics are not a part of the CPU itself but are available "on certain motherboards (Chipset feature)" according to the data. This means a user considering this processor must also account for a separate graphics solution unless the motherboard provides one through its chipset. For a basic office machine with no gaming or media demands, this arrangement is acceptable. For any visually intensive task, a discrete GPU is mandatory, but the CPU’s single thread will still limit overall system responsiveness. The end-of-life production status further narrows the audience to hobbyists, collectors, or those maintaining legacy industrial systems that cannot be migrated to newer hardware.

How It Compares

The FACT PACK lists no nearest rivals for the Intel Pentium III 1133S, meaning the database has no direct comparison points with specified scores or deltaPct values. In the absence of rival data, the only positional reference is the 50th percentile ranking, which places this processor exactly at the median of all CPUs ever tested. This is a neutral position: half of all processors in the database are faster, and half are slower. The lack of nearestRivals entries suggests that this chip is either too old to have been benchmarked against modern parts or that its performance class is so narrow that no other processor in the database falls within the typical comparison threshold.

Without rival scores, any statement about being "ahead of" or "behind" a specific competitor cannot be made from the provided data. The 1133S’s position at the 50th percentile is a global statement across all CPUs, not a relative one against a defined competitor set. In practical terms, this means the processor is unremarkable — it does not excel in any measured category, nor does it fail catastrophically. Its single-core design and 1133.00 MHz clock are the only performance inputs, and the 512 KB L2 cache is the only other cache level beyond the 8 KB L1. The absence of an L3 cache further limits any potential for data reuse across larger working sets.

If one were to extrapolate from the percentile alone, the 1133S would sit below any multi-core processor from the last two decades, but the data does not permit naming a specific rival. The 29 W TDP is low, indicating that the chip does not generate significant heat, but this is a thermal characteristic, not a performance comparison. The 130 nm process node is large by modern standards, yet this is a fabrication detail, not a benchmark outcome. The data supports only one comparative conclusion: the 1133S is a median performer in the full historical database, with no peer group defined.

Single-Thread vs Multi-Thread Behavior

The Pentium III 1133S is a pure single-thread processor: one core, one thread, no boost clock. This means the chip’s performance in any workload is entirely determined by its 1133.00 MHz base clock and the efficiency of the P6 architecture. In single-threaded tasks, the processor will behave predictably, with the 50th percentile ranking indicating that its single-thread capability is exactly average relative to all CPUs in the database. The 8 KB L1 cache and 512 KB L2 cache are the only memory hierarchy available to feed that single thread; there is no L3 cache to buffer larger data sets.

Multi-threaded workloads are effectively impossible on this processor, as the single thread cannot be split across multiple execution units. Any application that spawns more than one thread will see the second thread wait for the first, resulting in serialized execution and poor overall throughput. The data shows no benchmarks, so there is no measured multi-thread score to cite, but the architectural reality is that the 1133S offers no parallel execution capability. This is a critical distinction for modern users: even a dual-core processor from a later generation would outperform this chip in multi-threaded tasks by a wide margin, but the data does not permit naming such a rival.

The lack of a boost clock is notable in a single-thread context. Many processors can temporarily raise their clock speed for short bursts of single-threaded activity, but the 1133S is fixed at 1133.00 MHz. This means that bursty workloads will not receive any transient performance benefit. The 50th percentile ranking is therefore a static measure, not a peak performance figure. For real workloads, the split is simple: single-threaded legacy software runs as well as the clock and cache allow, and multi-threaded software runs poorly or not at all, depending on whether it can degrade gracefully to a single thread.

FAQ

Q: Does this processor have integrated graphics?

A: The data indicates that integrated graphics are available "on certain motherboards (Chipset feature)," meaning the graphics capability is a motherboard feature, not a built-in part of the CPU itself.

Q: What is the clock speed of the Pentium III 1133S?

A: The base clock is 1133.00 MHz, and there is no boost clock listed in the data, so the processor operates at a fixed frequency.

Q: How many cores and threads does this CPU have?

A: The processor has exactly one core and one thread, making it a single-threaded, single-core part.

Q: Is this processor still in production?

A: No, the production status is listed as "End-of-life," and the release date is 2001-05-31.

Q: What is the thermal design power of this chip?

A: The TDP is 29 watts, which is a low value indicating modest heat generation.

Q: Does this CPU support ECC memory?

A: No, the data explicitly lists ECC memory support as false, so error-correcting memory is not available.

Power and Thermals

The Intel Pentium III 1133S has a thermal design power of 29 watts, a figure that places it in the low-power category for desktop processors of its era. A 29 W TDP means the chip does not require an aggressive cooling solution; a basic air cooler with a small heatsink and fan would be sufficient to maintain safe operating temperatures. The 130 nm process node is relatively large by modern standards, but the low clock of 1133.00 MHz and the single-core design keep power consumption modest. The die size is 80 mm² and the transistor count is 44 million, both of which are consistent with an early-2000s processor and contribute to the low thermal envelope.

The absence of a boost clock means there is no transient power spike from frequency ramping, so the 29 W TDP is a stable, continuous figure under load. For system builders, this simplifies cooling design: no high-end air or liquid cooling is necessary, and a passive heatsink might even suffice for light workloads, though the data does not specify a required cooling tier. The low TDP also means that power delivery on the motherboard does not need to be robust, as the current draw at 29 W is minimal. This makes the chip suitable for compact or passively cooled systems, provided the motherboard supports the Intel Socket 370 interface.

The 130 nm process node and 44 million transistors are fabrication details that explain the modest power draw; larger transistors on an older process typically consume more power per unit area, but the low clock and single core offset this. The die size of 80 mm² is small, further reducing the thermal load. There is no data on idle power or load power beyond the 29 W TDP, so the analysis must stop at the rated thermal design point. For any user considering this processor, a capable air cooler — one sized for a 29 W part — is all that is required, and no special thermal management is needed.

Platform and Compatibility

The Pentium III 1133S uses the Intel Socket 370 interface, a socket that was common for Intel’s Pentium III and Celeron processors in the early 2000s. The architecture is P6, with the codename Tualatin, and the generation is listed as "Pentium III (Tualatin)." The processor fits into any Socket 370 motherboard that supports the Tualatin core, which is a subset of Socket 370 boards — earlier Socket 370 boards may not have the necessary voltage regulators or BIOS support. The data does not specify memory support, memory bus width, or memory bandwidth, so no statements can be made about RAM compatibility beyond the fact that ECC memory is not supported.

PCIe support is not listed in the data, which is expected for a processor from 2001 — the PCIe standard was not yet in use, and the platform likely relied on AGP and PCI buses, but the data does not confirm this. The integrated graphics are a chipset feature, meaning the motherboard must provide video output through its chipset; the CPU itself has no graphics cores. The part number is listed as "SL5LVSL5PUSL6BWSL6JM," which is a multi-part identifier for stepping and packaging, but this has no bearing on compatibility beyond identifying the exact silicon revision.

The upgrade path for the 1133S is effectively nonexistent, as the production status is end-of-life and the Socket 370 platform is obsolete. Within the same socket, a user could theoretically swap to a higher-clocked Tualatin Pentium III, but the data does not list any such alternatives. The 29 W TDP means the motherboard does not need a robust power delivery system, but the platform’s age limits any meaningful future upgrade. The lack of a boost clock and the fixed 1133.00 MHz frequency mean that the only way to improve performance is to replace the entire platform, not just the CPU. The memory support is unspecified, so any discussion of RAM capacity or type is outside the data’s scope.