Intel Core i5-11600KF

The Intel Core i5-11600KF is a 6-core, 12-thread desktop processor built on Intel’s Rocket Lake architecture and 14 nm process node. It posts a strong average benchmark score of 19,740, placing it in the 77th percentile of all CPUs, which indicates solid mid-to-high-range performance for its generation. The chip’s benchmark results reveal a consistent scaling pattern across thread counts, with the 3DMark suite showing a jump from 962 points in single-threaded tests to 6,237 in 16-thread workloads, and 6,240 at max threads. This near-linear scaling suggests the processor manages its 6 physical cores efficiently without significant contention overhead, though the 12 MB of shared L3 cache is modest by modern standards, potentially limiting some multi-threaded gains.

In Cinebench R23, the i5-11600KF scores 16,586 in multi-core and 2,341 in single-core tests. The ratio between these scores—roughly 7:1—is typical for a 6-core part with Hyper-Threading, and the single-core result is particularly strong, reflecting the high 4.90 GHz boost clock. Geekbench results align closely, with a multi-core score of 8,640 and a single-core score of 2,223, representing a similar 3.9:1 ratio. PassMark’s individual workloads show the processor’s character: integer math scores 64,195, floating-point math reaches 38,129, and extended instructions hit 17,619, while data compression (242,730) and random string sorting (27,767) indicate fast memory and cache handling. The single-thread PassMark score of 3,327 is competitive, but the multithread score of 19,513 lags behind the 3DMark max-thread result proportionally, suggesting that some synthetic multi-thread tests may be more sensitive to the 125 W TDP and thermal constraints than others.

Benchmark Performance

The i5-11600KF’s benchmark scores place it in a tight cluster of rivals, with all comparisons falling within a single percentage point. Against the Intel Core i5-11600K, the KF variant scores 19,740 versus 19,771, a delta of -0.2%. This is effectively a statistical tie, meaning the absence of integrated graphics in the KF part does not translate into any meaningful performance penalty or advantage in raw computational workloads. The i5-1345U, a mobile processor, posts an average score of 19,691, which is 0.3% lower than the 11600KF; this narrow margin is noteworthy because the 1345U operates in a far lower power envelope, indicating that the 11600KF’s desktop power budget does not yield a substantial lead in synthetic averages. The Intel Core i7-9700, an older 8-core part, scores 19,831, or 0.5% higher, while the Intel Core i5-12400, a newer 6-core Alder Lake chip, scores 19,850, or 0.6% higher. These deltas are minuscule, and in real-world applications, the differences would be imperceptible.

Looking at specific workloads, the 11600KF’s Cinebench R20 multi-core score of 6,966 and single-core score of 983 show a similar pattern. The single-core R20 result is within a few percent of the 12400’s expected performance, though the 12400’s newer architecture typically offers higher instructions per clock. The 11600KF’s 3DMark 2-thread score of 1,861 is strong, and the 4-thread score of 3,492 scales nearly linearly (1.88x), which is a good sign for lightly threaded gaming and productivity tasks. However, the jump from 8-thread (5,238) to 16-thread (6,237) is only 1.19x, revealing diminishing returns beyond 8 threads—a common trait for 6-core parts where the 12 threads start to saturate memory bandwidth and cache capacity. The PassMark prime numbers test score of 59 is notably low, indicating that this CPU is not optimized for heavy integer recursion workloads, but this is a niche application and not representative of general performance.

How It Compares

Intel Core i5-11600K: The KF variant trails the K by a mere 0.2% in average score, making them functionally equivalent in performance. The only difference is the absence of integrated graphics in the KF, which does not affect CPU-bound benchmark results. For users who already have a discrete GPU, the KF offers the same computational capability at a lower launch MSRP of $237.

Intel Core i5-1345U: This mobile processor scores 0.3% lower than the 11600KF, which is surprising given its intended power-constrained environment. The 1345U achieves near-parity in average benchmarks, but the 11600KF’s advantage lies in sustained multi-threaded workloads where its 125 W TDP allows for higher sustained clocks, whereas the 1345U will likely throttle under long loads. In short bursts, however, the 1345U is remarkably close.

Intel Core i7-9700: The older 8-core i7 scores 0.5% higher than the 11600KF. This is a case where more physical cores—8 versus 6—compensate for an older architecture and lower clock speeds. The 9700 lacks Hyper-Threading, so its 8 threads are fewer than the 11600KF’s 12, yet it still edges ahead in average score, suggesting that the 11600KF’s higher boost clock (4.90 GHz) cannot fully overcome the 9700’s extra two physical cores in multi-threaded benchmarks.

Intel Core i5-12400: The 12400 leads by 0.6%, the largest margin among the listed rivals. This is expected given the generational leap from Rocket Lake to Alder Lake, which brings a newer process node (though not listed, the architectural improvements are evident). The 12400’s 6-core, 12-thread configuration matches the 11600KF, but its higher IPC and efficiency allow it to pull ahead slightly. The 11600KF remains competitive, but it is clearly outclassed by its direct successor.

Power and Thermals

The i5-11600KF carries a 125 W TDP, which classifies it as a high-power desktop part. This TDP requires a capable air cooler or a basic liquid cooler to maintain sustained boost clocks under load; the data shows that the 3DMark max-thread score (6,240) is nearly identical to the 16-thread score (6,237), implying that thermal throttling is minimal in short-duration tests, but longer workloads like Cinebench R23 (16,586 multi-core) may push the CPU to its thermal limits. The 14 nm process node is relatively mature, and while it does not offer the efficiency of newer nodes, the 125 W budget is sufficient for the 6-core design. The die size of 276 mm² is large for a 6-core part, which helps with heat dissipation but also indicates that the chip is not densely packed. Users should plan for a cooling solution that can handle 125 W of continuous heat output, especially in systems with restricted airflow. The absence of integrated graphics in the KF variant does not affect thermals, as the GPU die is simply omitted, leaving the same CPU cores and cache intact.

FAQ

Q: How does the i5-11600KF perform in single-threaded tasks?

A: The 3DMark single-thread score is 962, Cinebench R23 single-core is 2,341, and PassMark single-thread is 3,327. These results place it in the top tier for its generation, driven by the 4.90 GHz boost clock.

Q: Is the i5-11600KF faster than the i5-1345U?

A: Yes, but only by 0.3% in average benchmark score (19,740 versus 19,691). The desktop part holds an advantage in sustained workloads due to its 125 W TDP, but the mobile chip is remarkably close in synthetic tests.

Q: What is the memory configuration for this CPU?

A: It supports dual-channel DDR4 with a maximum memory bandwidth of 51.2 GB/s. It does not support ECC memory.

Q: Does the i5-11600KF include integrated graphics?

A: No, the KF suffix indicates that the integrated graphics are disabled or absent. This requires a discrete GPU for any display output.

Q: What is the release timeframe and current production status?

A: The CPU was released on March 15, 2021, and its production status is end-of-life, meaning it is no longer actively manufactured.

Q: Can the i5-11600KF be overclocked?

A: Yes, the multiplier is unlocked, allowing users to adjust the clock speed beyond the 4.90 GHz boost. Overclocking will increase power draw beyond the 125 W TDP and requires appropriate cooling.

Platform and Compatibility

The i5-11600KF is designed for the Intel Socket 1200 platform, which is specific to Rocket Lake and Comet Lake processors. It uses the Rocket Lake architecture and is part of the Core 11th Gen series. The CPU provides Gen 4 PCIe with 20 lanes available from the CPU itself, enabling fast NVMe storage and modern GPUs, though the total lane count is modest for multi-GPU setups. Memory support is limited to DDR4 in a dual-channel configuration, with a peak bandwidth of 51.2 GB/s; there is no support for DDR5, which is a notable limitation compared to newer platforms. ECC memory is not supported, so this chip is not suited for error-correcting memory workloads. The socket has an upgrade path within the same generation—users can move to higher-tier Rocket Lake parts like the i7 or i9—but no forward compatibility with Alder Lake or later sockets exists. The 14 nm process node and 276 mm² die size mean the chip is physically larger than newer 10 nm or 7 nm parts, but it fits standard Socket 1200 coolers. The multiplier is unlocked, allowing overclocking, and the part number is SRKNV. The launch MSRP is $237, and the CPU was released on March 15, 2021, now marked as end-of-life. For a new build in the current market, this platform is dated, but for users already on Socket 1200, it remains a viable 6-core option with competitive benchmark scores against its immediate peers.