Intel Core i9-11900KB
Intel processor specifications and benchmark scores
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IntelIntel Core i9-11900KB Specifications
Core i9-11900KB Core Configuration
Processing cores and threading
The Intel Core i9-11900KB features 8 physical cores and 16 threads, which directly impacts multi-threaded performance in CPU benchmarks. More cores allow the processor to handle parallel workloads efficiently, improving performance in video editing, 3D rendering, and multitasking scenarios. Thread count determines how many simultaneous tasks the CPU can process, with higher thread counts benefiting productivity applications and content creation workflows.
i9-11900KB Clock Speeds
Base and boost frequencies
Clock speed is a critical factor in Core i9-11900KB benchmark performance, measured in GHz. The base clock represents the guaranteed operating frequency, while the boost clock indicates maximum single-core performance under optimal conditions. Higher clock speeds translate to faster single-threaded performance, which is essential for gaming and applications that don't fully utilize multiple cores. The Core i9-11900KB by Intel can dynamically adjust its frequency based on workload and thermal headroom.
Intel's Core i9-11900KB Cache Hierarchy
L1, L2, L3 cache sizes
Cache memory is ultra-fast storage built directly into the i9-11900KB processor die. L1 cache provides the fastest access for frequently used data, while L2 and L3 caches offer progressively larger storage with slightly higher latency. Larger cache sizes significantly improve CPU benchmark scores by reducing memory access times. The Core i9-11900KB's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.
Tiger Lake Architecture & Process
Manufacturing and design details
The Intel Core i9-11900KB is built on Intel's 10 nm manufacturing process, which determines power efficiency and thermal characteristics. Smaller process nodes allow for more transistors in the same space, enabling higher performance per watt. The architecture defines how the processor handles instructions and manages data flow, directly impacting benchmark results across different workload types. Modern CPU architectures like the one in i9-11900KB incorporate advanced branch prediction and out-of-order execution for optimal performance.
Tiger Lake Instruction Set Features
Supported CPU instructions and extensions
The Core i9-11900KB by Intel supports various instruction set extensions that enable optimized performance for specific workloads. SIMD instructions like SSE and AVX accelerate multimedia, scientific computing, and AI workloads by processing multiple data points simultaneously. Features like AES-NI provide hardware-accelerated encryption, while AVX-512 (if supported) enables advanced vector processing for data centers and high-performance computing. These instruction sets are critical for software compatibility and performance in modern applications.
i9-11900KB Power & Thermal
TDP and power specifications
The Intel Core i9-11900KB has a TDP (Thermal Design Power) of 65W, indicating the cooling solution required for sustained operation. TDP affects both system power consumption and the type of cooler needed. Lower TDP processors are ideal for compact builds and laptops, while higher TDP chips typically offer better sustained performance in demanding CPU benchmarks. Understanding power requirements helps ensure your system can deliver consistent performance without thermal throttling.
Intel BGA 1787 Platform & Socket
Compatibility information
The Core i9-11900KB uses the Intel BGA 1787 socket, which determines motherboard compatibility. Choosing the right platform is essential for building a system around this processor. The socket type also influences available features like PCIe lanes, memory support, and upgrade paths. When comparing CPU benchmarks, ensure you're looking at processors compatible with your existing or planned motherboard to make informed purchasing decisions.
Intel BGA 1787 Memory Support
RAM compatibility and speeds
Memory support specifications for the i9-11900KB define which RAM types and speeds are compatible. Faster memory can significantly improve CPU benchmark performance, especially in memory-intensive applications and gaming. The memory controller integrated into the Core i9-11900KB determines maximum supported speeds and channels. Dual-channel or quad-channel memory configurations can double or quadruple memory bandwidth, providing noticeable performance gains in content creation and scientific workloads.
Intel's Core i9-11900KB Integrated Graphics
Built-in GPU specifications
The Intel Core i9-11900KB includes integrated graphics, eliminating the need for a dedicated GPU in basic computing scenarios. Integrated graphics are ideal for office productivity, video playback, and light gaming. While not designed for demanding GPU benchmarks, the iGPU in the i9-11900KB provides hardware video encoding and decoding capabilities. This makes the processor suitable for compact builds, HTPCs, and systems where power efficiency is prioritized over gaming performance.
Core i9-11900KB Product Information
Release and pricing details
The Intel Core i9-11900KB is manufactured by Intel and represents their commitment to delivering competitive CPU performance. Understanding the release date and pricing helps contextualize benchmark comparisons with other processors from the same generation. Launch pricing provides a baseline for evaluating value, though street prices often differ. Whether you're building a new system or upgrading, the Core i9-11900KB by Intel offers a specific balance of performance, features, and cost within Intel's product lineup.
Core i9-11900KB Benchmark Scores
cinebench_cinebench_r15_multicoreSource
Cinebench R15 multi-core renders a complex 3D scene using all CPU threads simultaneously. This test reveals how Intel Core i9-11900KB performs in parallel rendering workloads.
Top 5 Performers
Top 5 PerformersNearby Performers
Nearby Performerscinebench_cinebench_r15_singlecoreSource
Cinebench R15 single-core measures the speed of one CPU thread rendering 3D geometry. This score indicates how Intel Core i9-11900KB handles tasks that can't be parallelized.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r20_multicoreSource
Cinebench R20 multi-core uses a scene requiring 4x more computational power than R15. This test better reflects modern CPU capabilities for professional rendering on Intel Core i9-11900KB. The more demanding workload provides better differentiation between current-generation processors. Content creators and 3D artists use this benchmark to estimate real-world render performance.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r20_singlecoreSource
Cinebench R20 single-core tests one thread against a more demanding scene than R15. This reveals the true single-thread rendering capability of Intel Core i9-11900KB. The increased complexity provides more accurate performance differentiation between modern CPUs. Single-thread performance remains critical for gaming and applications with serial bottlenecks.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_multicoreSource
Cinebench R23 multi-core is the current standard for CPU rendering benchmarks with a 10-minute minimum runtime. This extended test reveals sustained performance of Intel Core i9-11900KB after thermal limits kick in. The longer duration exposes cooling limitations that shorter benchmarks miss. Professional users rely on R23 scores to predict real-world rendering performance under sustained workloads.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_singlecoreSource
Cinebench R23 single-core measures sustained single-thread performance over 10 minutes. This reveals how Intel Core i9-11900KB maintains boost clocks under continuous load. The extended runtime shows whether thermal throttling affects single-core performance. This score is particularly important for understanding real-world responsiveness beyond initial boost behavior.
Top 5 Performers
Nearby Performers
About Intel Core i9-11900KB
Intel Core i9-11900KB is an end-of-life mobile processor built on Intel's 10 nm Tiger Lake-H architecture. It packs 8 cores and 16 threads with a base clock of 3.30 GHz and a boost clock of 5.30 GHz. The chip carries a 65 W TDP, uses the BGA 1787 socket, and supports dual-channel DDR4 memory. Its benchmark results place it at the 65th percentile among all CPUs, with an average benchmark score of 5620 across tested workloads.
Benchmark Performance
The Core i9-11900KB delivers strong multi-threaded performance for its mobile classification. In Cinebench R23 multi-core, it scores 19432 points, while its single-core result reaches 2743 points. Cinebench R20 shows 8161 multi-core and 1152 single-core points, and Cinebench R15 produces 1958 multi-core and 276 single-core points. These scores indicate a processor that excels in bursty, short-duration workloads typical of mobile productivity tasks.
The data reveals a tight competitive cluster around this chip. Its average benchmark score of 5620 sits within 1% of all four nearest rivals, making the i9-11900KB essentially tied with its closest competition. The largest delta is against the Intel Core i9-7920X, where the i9-11900KB trails by 0.9% — a negligible margin given the architectural differences. Against the Intel Core i9-12900TE, the delta is -0.1%, meaning the i9-11900KB is effectively level with that newer low-power desktop chip. The i9-11900KB edges ahead of the Intel Core i5-12600HE by 0.1% and the AMD Ryzen 7 PRO 3700 by 0.2%.
Single-core scores tell a clearer story of the architecture's strength. The Cinebench R23 single-core score of 2743 represents a substantial advantage over older rivals, though the nearestRivals data provides only average scores for comparison. The 5.30 GHz boost clock is the key contributor here, allowing the Tiger Lake-H design to achieve high per-thread throughput. Multi-core scaling is also efficient, with the 8-core/16-thread configuration producing 19432 points in Cinebench R23 — a figure that demonstrates solid thread utilization without thermal throttling artifacts.
How It Compares
Intel Core i9-12900TE: The i9-11900KB essentially matches this rival, with a delta of -0.1% in average benchmark score (5620 vs 5626). Despite the 12900TE being a newer hybrid architecture, the two processors deliver statistically identical performance. The i9-11900KB's higher boost clock helps offset any generational efficiency gains from the rival.
Intel Core i5-12600HE: Here the i9-11900KB holds a 0.1% advantage (5620 vs 5612). This is a marginal win, but notable because the 12600HE is a lower-tier product with fewer high-performance cores. The i9-11900KB's 8 full cores and 16 threads appear to compensate for any core-count differences, keeping it slightly ahead in aggregate benchmarks.
AMD Ryzen 7 PRO 3700: The i9-11900KB leads this AMD rival by 0.2% (5620 vs 5610). This is a direct architectural comparison — Zen 2 versus Tiger Lake — and the Intel chip comes out on top in average score. The result suggests that Intel's 10 nm process and higher clocks overcome any IPC advantages the older AMD design might hold.
Intel Core i9-7920X: The i9-11900KB trails this high-end desktop part by 0.9% (5620 vs 5674). The 7920X is a 12-core monster from the HEDT platform, so a deficit is expected. That the gap is under 1% is remarkable, showing how far mobile processors have come. The i9-11900KB's 8 cores nearly match the 7920X's 12 cores in average benchmark performance.
Power and Thermals
The i9-11900KB carries a 65 W TDP, a figure that places it in the mainstream mobile power envelope. This is not an extreme-performance HX-class part; it is designed for thin-and-light gaming laptops and portable workstations where thermal headroom is limited. The 10 nm process node helps keep power draw manageable while still enabling boost clocks up to 5.30 GHz.
Cooling requirements are moderate for this class. A capable dual-fan laptop cooling solution should handle sustained multi-core loads without excessive throttling. The 65 W TDP means that during Cinebench R23 multi-core runs, the chip will draw near its rated power, but single-core bursts at 5.30 GHz may push transiently higher. The integrated UHD Graphics 750 adds a small thermal load when active, but discrete GPUs in typical i9-11900KB systems will handle graphics duties.
The die size of 190 mm² is relatively large for a 10 nm mobile part, which helps spread heat across the surface. L2 cache is 1.25 MB per core, and L3 cache totals 24 MB shared, contributing to efficient data flow that reduces wasted energy on cache misses. For system builders, a standard laptop thermal solution with heat pipes and a decent fan curve will suffice; no exotic liquid cooling or oversized vapor chambers are required.
FAQ
Q: What is the average benchmark score of the Intel Core i9-11900KB?
A: The average benchmark score is 5620, which places it at the 65th percentile among all CPUs tested in the database.
Q: How does the i9-11900KB compare to the AMD Ryzen 7 PRO 3700?
A: The i9-11900KB is 0.2% faster in average benchmark score (5620 vs 5610), making it the winner in this head-to-head matchup.
Q: What are the Cinebench R23 results for this processor?
A: In Cinebench R23, the i9-11900KB scores 19432 points in multi-core and 2743 points in single-core tests.
Q: Does the i9-11900KB support ECC memory?
A: No, ECC memory is not supported. The chip only supports non-ECC DDR4 memory in a dual-channel configuration.
Q: What is the launch MSRP of the i9-11900KB?
A: The launch MSRP is $539. It is now end-of-life production status.
Q: What PCIe version and lane count does the CPU provide?
A: The i9-11900KB provides 20 PCIe Gen 4 lanes from the CPU only, which supports modern GPUs and NVMe storage at full bandwidth.
Platform and Compatibility
The Core i9-11900KB uses the Intel BGA 1787 socket, a permanently soldered mobile mounting. This means upgrades are not possible at the CPU level; the chip is fixed to the motherboard. The platform supports dual-channel DDR4 memory with a bandwidth of 51.2 GB/s, and ECC memory is not supported. For storage and graphics, the CPU provides 20 PCIe Gen 4 lanes, enabling fast NVMe SSDs and discrete GPUs.
The integrated UHD Graphics 750 offers basic display output for systems without a discrete GPU, though most i9-11900KB laptops will pair it with a dedicated graphics card. The multiplier is unlocked, allowing overclocking on supported motherboard firmware — unusual for a mobile BGA part. However, the 65 W TDP limits practical overclocking headroom in thin chassis.
The Tiger Lake-H architecture is a one-generation solution; there is no upgrade path within the same socket. Users are committed to the 11th Gen platform for the lifespan of the system. The 190 mm² die and 10 nm process are mature, and the end-of-life status means no future firmware optimizations are likely. For a mobile workstation or high-end gaming laptop, the platform offers modern PCIe Gen 4 support and dual-channel DDR4, which remain competitive even as newer platforms move to DDR5 and PCIe Gen 5.
The AMD Equivalent of Core i9-11900KB
Looking for a similar processor from AMD? The AMD Ryzen 9 PRO 9955 offers comparable performance and features in the AMD lineup.
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