Intel Core i9-10920X vs Intel Core i9-12900E Comparison

The Verdict

The Intel Core i9-12900E is the better processor for the vast majority of tasks. It wins seven of the eight head-to-head benchmarks recorded in the database, with the only exception being Geekbench multicore, where the Intel Core i9-10920X takes a 7.9% lead. The 12900E delivers consistent single-core and multi-core victories across the Cinebench suite, posting a 7.6% advantage in Cinebench R23 multicore and the same 7.6% edge in Cinebench R23 singlecore. For users running rendering workloads, content creation, or any application that relies on Cinebench-style performance, the 12900E is the clear choice.

The Intel Core i9-10920X still holds a niche. Its Geekbench multicore win (11165 versus 10280) suggests it maintains an edge in certain memory-latency-sensitive or memory-bandwidth-heavy tasks, likely due to its quad-channel memory bus. However, this single victory does not offset the 12900E's dominance elsewhere. The 12900E also draws far less power, with a 65 W TDP versus 165 W for the 10920X, making it the more efficient option on paper. The 10920X is only advisable for someone who specifically needs the quad-channel memory configuration or the older Socket 2066 platform, and even then, the benchmark data does not broadly favor it.

Where Each One Wins

The Intel Core i9-12900E wins in single-threaded workloads across every recorded test. Its Cinebench R15 singlecore score of 334 beats the 10920X's 311 by 7.4%, its Cinebench R20 singlecore score of 1394 beats 1296 by 7.6%, its Cinebench R23 singlecore score of 3321 beats 3086 by 7.6%, and its Geekbench singlecore score of 1775 beats 1673 by 6.1%. The 12900E also wins in all three Cinebench multicore tests: R15 (2371 versus 2203, 7.6%), R20 (9882 versus 9181, 7.6%), and R23 (23529 versus 21861, 7.6%). These results make the 12900E the default pick for rendering, video encoding, and any threaded application measured by Cinebench.

The Intel Core i9-10920X wins only in Geekbench multicore, scoring 11165 against the 12900E's 10280, a 7.9% margin. This is a meaningful data point for users whose workloads resemble that benchmark's mix. The 10920X also has a higher base clock (3.50 GHz versus 2.30 GHz) and a quad-channel memory bus compared to the 12900E's dual-channel bus, both of which could contribute to its performance in memory-heavy scenarios. Still, the database records only one benchmark win for the 10920X, so its advantage is narrow and specific.

Architecture Differences

The two processors come from different generations and designs. The Intel Core i9-12900E is built on Alder Lake-S architecture using a 10 nm process node, while the Intel Core i9-10920X uses Cascade Lake-X on a 14 nm node. The 12900E has 16 cores and 24 threads, the 10920X has 12 cores and 24 threads. Both support simultaneous multithreading, but the 12900E achieves the same thread count with more physical cores.

Cache layouts differ substantially. The 12900E features 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 30 MB of shared L3 cache. The 10920X has 64 KB of L1 per core, 1 MB of L2 per core, and 19.25 MB of shared L3 cache. The 12900E also integrates UHD Graphics 770, while the 10920X has no integrated graphics. The 12900E supports both DDR4 and DDR5 memory through a dual-channel bus, whereas the 10920X supports DDR4 only, but through a quad-channel bus. The 12900E uses PCIe Gen 5 with 20 lanes (CPU only), while the 10920X uses PCIe Gen 3. Both processors have unlocked multipliers.

The socket situation is also different: the 12900E uses Intel Socket 1700, the 10920X uses Intel Socket 2066. The 12900E has a die size of 215 mm², while the 10920X's die size is not recorded in the database. The 12900E was released on 2022-01-03, the 10920X on 2019-10-18. The 12900E has a launch MSRP of $494; the 10920X has no recorded launch MSRP. Neither processor supports ECC memory.

FAQ

Q: Which processor has better single-core performance?

A: The Intel Core i9-12900E wins every recorded single-core test. It leads by 7.4% in Cinebench R15, 7.6% in Cinebench R20, 7.6% in Cinebench R23, and 6.1% in Geekbench.

Q: Does the Intel Core i9-10920X win any benchmarks?

A: Yes, it wins Geekbench multicore with a score of 11165, which is 7.9% higher than the 12900E's 10280.

Q: How do the core and thread counts compare?

A: The 12900E has 16 cores and 24 threads, while the 10920X has 12 cores and 24 threads.

Q: What memory configurations do the two processors support?

A: The 12900E supports DDR4 and DDR5 over a dual-channel bus. The 10920X supports only DDR4, but over a quad-channel bus.

Q: Do either processors include integrated graphics?

A: Only the 12900E, which includes UHD Graphics 770. The 10920X has no integrated graphics.

Q: Which processor uses more power?

A: The 10920X has a 165 W TDP, significantly higher than the 12900E's 65 W TDP.

Head-to-Head Benchmarks

The head-to-head data is decisive. The 12900E wins all three Cinebench multicore tests by exactly 7.6%: Cinebench R15 (2371 versus 2203), Cinebench R20 (9882 versus 9181), and Cinebench R23 (23529 versus 21861). The consistency of this margin across generations of the Cinebench suite indicates a stable performance advantage rather than a workload-specific fluke.

Single-core results follow a similar pattern. The 12900E wins Cinebench R15 singlecore by 7.4% (334 versus 311), Cinebench R20 singlecore by 7.6% (1394 versus 1296), Cinebench R23 singlecore by 7.6% (3321 versus 3086), and Geekbench singlecore by 6.1% (1775 versus 1673). These numbers show that the 12900E's architectural advantages, likely tied to its newer 10 nm process and updated core design, translate directly into faster single-thread execution.

The lone exception is Geekbench multicore, where the 10920X scores 11165 against the 12900E's 10280, a 7.9% lead. This result is notable because it flips the multicore narrative found in Cinebench. The 10920X's quad-channel memory bus may explain the difference, as Geekbench's multicore portion can be sensitive to memory bandwidth. Still, this is one test out of eight, and the 12900E's average benchmark score of 6611 versus the 10920X's 6347 reflects its overall superiority.

In terms of broader positioning, the 12900E sits at the 62nd percentile of all CPUs and has an average benchmark score of 6611. Its nearest rivals include the Intel Core i9-10940X (average score 6605, 0.1% difference) and the Intel Core i5-13500E (6586, 0.4% difference), showing it is tightly clustered with other strong desktop processors. The 10920X also sits at the 62nd percentile, with an average score of 6347, and its nearest rivals include the AMD EPYC 7551 (6391, -0.7% difference) and the AMD Ryzen Threadripper 1950X (6231, 1.9% difference). Both CPUs occupy the same percentile tier, but the 12900E does so with a higher average score and a much lower TDP.

Specification Differences

The table below lists only the fields where the two processors differ, based on the recorded data.

| Specification | Intel Core i9-12900E | Intel Core i9-10920X |

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

| Series | Core 12th Gen | Core 10th Gen |

| Cores | 16 | 12 |

| Base Clock | 2.30 GHz | 3.50 GHz |

| Boost Clock | 5.00 GHz | 4.80 GHz |

| TDP | 65 W | 165 W |

| Socket | Intel Socket 1700 | Intel Socket 2066 |

| Architecture | Alder Lake | Cascade Lake |

| Codename | Alder Lake-S | Cascade Lake-X |

| Generation | Core i9 (Alder Lake-S) | Core i9 (X-Series 10th Gen) |

| Process Node | 10 nm | 14 nm |

| Die Size | 215 mm² | Not recorded |

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

| L2 Cache | 1.25 MB (per core) | 1 MB (per core) |

| L3 Cache | 30 MB (shared) | 19.25 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR4 |

| Memory Bus | Dual-channel | Quad-channel |

| PCIe | Gen 5, 20 Lanes (CPU only) | Gen 3 |

| Integrated Graphics | UHD Graphics 770 | None |

| Release Date | 2022-01-03 | 2019-10-18 |

| Launch MSRP | $494 | Not recorded |

| Part Number | SRL6B | Not recorded |

Both processors share the same manufacturer, thread count (24), lack of ECC support, and unlocked multipliers. The 12900E's newer process node, larger caches, and integrated graphics give it structural advantages that align with its benchmark wins, while the 10920X's higher base clock and quad-channel memory bus correlate with its single Geekbench multicore victory.