Intel Core i7-11700B vs Intel Core i9-10900KF Comparison

# Intel Core i9-10900KF vs Intel Core i7-11700B

The Intel Core i9-10900KF and Intel Core i7-11700B represent two very different Intel design philosophies, yet benchmark results place them remarkably close. The 10-core Comet Lake desktop part, launched in 2020 as an end-of-life flagship, goes head-to-head with an 8-core Tiger Lake-H mobile chip from 2021. Across six Cinebench workloads, the i9-10900KF wins every single test, but the margins are consistently slim—between 4.1% and 4.3%. This raises an immediate question: how does a 10-core chip with a 125W TDP only edge out an 8-core mobile processor with a 65W TDP by such a narrow margin, and what does that say about architectural efficiency versus raw core count?

FAQ

Q: Which processor wins in multi-core Cinebench R23?

A: The Intel Core i9-10900KF scores 18,867 points compared to the Intel Core i7-11700B’s 18,119 points, giving the i9 a 4.1% advantage in the multicore test.

Q: Is the single-threaded performance gap larger than the multi-threaded gap?

A: In Cinebench R23 single-core, the i9-10900KF scores 2,663 against the i7-11700B’s 2,558, a 4.1% lead. The single-core delta matches the multicore delta exactly in R23, and across all six head-to-head tests, the advantage ranges narrowly from 4.1% to 4.3%.

Q: What is the core and thread count difference?

A: The i9-10900KF has 10 cores and 20 threads, while the i7-11700B has 8 cores and 16 threads. Despite having 25% more cores, the i9 only achieves a 4.1% multicore advantage in Cinebench R23.

Q: Which processor has a higher boost clock?

A: The i9-10900KF boosts to 5.30 GHz, whereas the i7-11700B reaches 4.80 GHz. The i9’s 500 MHz boost advantage contributes to its single-core wins.

Q: Do both processors support the same memory type?

A: Both support DDR4 memory with dual-channel buses. However, the i7-11700B has a higher memory bandwidth at 51.2 GB/s compared to the i9-10900KF’s 46.9 GB/s.

Q: What is the process node difference?

A: The i9-10900KF uses Intel’s 14 nm process (Comet Lake), while the i7-11700B uses the 10 nm process (Tiger Lake-H). The i7 also features a smaller die size at 190 mm².

Architecture Differences

The architectural gap between these two processors is substantial. The i9-10900KF is built on Comet Lake, Intel’s 14 nm desktop architecture, featuring 10 cores with a base clock of 3.70 GHz and a boost clock of 5.30 GHz. It uses a conventional design with 64 KB of L1 cache per core and 256 KB of L2 cache per core, alongside a shared 20 MB L3 cache. This is a mature, high-frequency design aimed at desktop enthusiasts, with an unlocked multiplier for overclocking and a 125W TDP.

The i7-11700B, by contrast, is a Tiger Lake-H mobile part built on Intel’s 10 nm process. It houses 8 cores running at a 3.20 GHz base and 4.80 GHz boost. Its cache hierarchy is notably different: 80 KB of L1 per core and a massive 1.25 MB of L2 per core, plus a larger 24 MB shared L3 cache. The die size is 190 mm², reflecting the newer process. This is a mobile-first design with a 65W TDP, soldered into a BGA 1787 package rather than socketed.

The memory controllers also differ. Both support DDR4 dual-channel, but the i7-11700B achieves 51.2 GB/s bandwidth versus the i9’s 46.9 GB/s. The i7 also brings PCIe Gen 4 with 20 lanes, while the i9 is limited to PCIe Gen 3 with 16 lanes. The i7 includes integrated UHD Graphics (Xe-LP), while the i9 has no integrated graphics—a key distinction for builds without a discrete GPU. The i9 is unlocked for overclocking; the i7 is locked. These architectural choices explain why a 10-core chip barely outperforms an 8-core one: the Tiger Lake architecture delivers more instructions per clock and better memory throughput, compensating for fewer cores.

Head-to-Head Benchmarks

The six Cinebench tests paint a consistent picture. In Cinebench R15 multicore, the i9-10900KF scores 1,901 against the i7-11700B’s 1,826, a 4.1% win. The single-core R15 test shows 268 versus 257, a 4.3% margin—the largest gap in any test. Moving to R20 multicore, the i9 posts 7,924 against 7,609, again 4.1% ahead. The R20 single-core result is 1,118 versus 1,074, another 4.1% gap. In R23 multicore, the i9’s 18,867 bests 18,119 by 4.1%, and the single-core R23 test shows 2,663 versus 2,558, also 4.1%.

The uniformity of these deltas is striking. It suggests the i9’s advantage is not workload-dependent but rather a consistent per-thread performance edge. The i9 has two more cores and higher clocks, yet the i7’s architectural efficiency (newer process, larger L2 cache, higher memory bandwidth) nearly neutralizes that advantage. In absolute terms, the i9 wins all six benchmarks, but the i7 never falls behind by more than 4.3%. This is a remarkably tight contest for a 10-core desktop part versus an 8-core mobile chip.

The i9’s best showing is in single-threaded R15, where it leads by 4.3%. This likely reflects its 5.30 GHz boost clock versus the i7’s 4.80 GHz. However, in multicore tests, the gap narrows to 4.1%, suggesting that the i7’s larger L2 and L3 caches help it scale better across all cores. If the i7 had 10 cores, it would likely surpass the i9 entirely—but with 8 cores, it must settle for second place.

Specification Differences

| Specification | Intel Core i9-10900KF | Intel Core i7-11700B |

|---|---|---|

| Cores | 10 | 8 |

| Threads | 20 | 16 |

| Base Clock | 3.70 GHz | 3.20 GHz |

| Boost Clock | 5.30 GHz | 4.80 GHz |

| TDP | 125W | 65W |

| Socket | Intel Socket 1200 | Intel BGA 1787 |

| Architecture | Comet Lake | Tiger Lake |

| Process Node | 14 nm | 10 nm |

| Die Size | Not listed | 190 mm² |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 256 KB (per core) | 1.25 MB (per core) |

| L3 Cache | 20 MB (shared) | 24 MB (shared) |

| Memory Bandwidth | 46.9 GB/s | 51.2 GB/s |

| PCIe | Gen 3, 16 Lanes | Gen 4, 20 Lanes |

| Integrated Graphics | None | UHD Graphics (Xe-LP) |

| Multiplier Unlocked | Yes | No |

| Launch MSRP | $509 | Not listed |

The spec sheet reveals the fundamental trade-off. The i9 offers more cores, higher clocks, and an unlocked multiplier, but it does so on an older, less efficient process with a much higher TDP. The i7 counters with a newer node, larger caches, faster memory bandwidth, PCIe Gen 4, and integrated graphics—all while consuming nearly half the power. The i9’s 125W TDP versus the i7’s 65W is the starkest difference, highlighting how process leadership can deliver comparable performance at lower power.

The Verdict

The data shows a clear but narrow victory for the Intel Core i9-10900KF. It wins every benchmark, but the margins are consistently around 4%, which is far narrower than the core count difference would suggest. The i9’s 10 cores and 20 threads provide a structural advantage that the i7 cannot fully overcome despite its architectural refinements. For users who prioritize raw multi-threaded throughput and have access to a discrete GPU, the i9 is the stronger choice—especially considering its 5.30 GHz boost clock and unlocked multiplier for further tuning.

However, the i7-11700B is not a poor performer. It delivers 95% of the i9’s multicore performance at roughly half the power draw, with a smaller die and integrated graphics. For a mobile or space-constrained system, the i7 is the more sensible option. The i9’s 14 nm process and 125W TDP make it a power-hungry desktop part, while the i7’s 10 nm process and 65W TDP offer efficiency that the i9 cannot match. The i9 also lacks integrated graphics, requiring a discrete GPU for any display output, whereas the i7 includes UHD Graphics (Xe-LP).

The i9’s nearest rivals include the AMD EPYC 7281 (delta 0%), AMD Ryzen Threadripper 1920X (delta 0.2%), and Intel Core i9-9900X (delta 0.3%), all within a fraction of a percent. The i7’s rivals include the Intel Core i9-10850K (delta 0%), Intel Core i5-14401E (delta -0.2%), and Intel Xeon E5-2699A v4 (delta -0.3%). Both processors sit in the 60th percentile of all CPUs, indicating they are mid-to-upper-range performers in the broader market.

Where Each One Wins

The Intel Core i9-10900KF wins in every benchmark category tested. Its strengths lie in multi-threaded workloads where its 10 cores and 20 threads can be fully utilized. Cinebench R23 multicore shows the i9 at 18,867 points, a score that would suit video rendering, 3D modeling, and other heavily threaded tasks. Its 5.30 GHz boost clock also gives it a single-thread edge, making it competitive in lightly threaded applications like older games or productivity software that favor high clock speeds. The unlocked multiplier is an additional advantage for enthusiasts willing to push beyond stock performance, though the 125W TDP means cooling and power delivery must be robust.

The Intel Core i7-11700B wins in efficiency and platform features. Despite losing all six benchmarks, it does so by only 4.1% to 4.3%, meaning it delivers nearly identical real-world performance for most users. Its 65W TDP makes it far easier to cool in compact systems, and its integrated UHD Graphics (Xe-LP) eliminates the need for a discrete GPU in basic configurations. The i7 also supports PCIe Gen 4 with 20 lanes, enabling faster NVMe storage and newer GPUs, while its 51.2 GB/s memory bandwidth exceeds the i9’s 46.9 GB/s. For a laptop or small-form-factor desktop, the i7 is the better fit, trading a small performance deficit for substantial power and thermal savings.

The i9 takes the performance crown, but the i7 wins on efficiency and integration. The data suggests that architectural progress matters more than raw core count—a lesson Intel’s 10 nm Tiger Lake design demonstrates by nearly matching a 14 nm Comet Lake flagship with two fewer cores.