Intel Core i9-10900 vs Intel Core i9-11900T Comparison

FAQ

Q: Which processor wins the majority of head-to-head benchmark comparisons?

A: The Intel Core i9-10900 wins 7 of the 8 head-to-head comparisons, with the Intel Core i9-11900T taking only a single victory in Geekbench single-core testing.

Q: How large is the Core i9-11900T's single-core advantage?

A: In the Geekbench single-core test, the Core i9-11900T scores 2157 compared to the Core i9-10900's 1651, a lead of 30.6%.

Q: What is the performance gap in multi-threaded Cinebench workloads?

A: Across Cinebench R15, R20, and R23 multi-core tests, the Core i9-10900 consistently leads by 3.8%, with scores of 1634 vs 1572, 6811 vs 6550, and 16219 vs 15596 respectively.

Q: Do the two processors share the same socket?

A: Yes, both use the Intel Socket 1200, though they belong to different generations: the Core i9-11900T is Rocket Lake (11th Gen) and the Core i9-10900 is Comet Lake (10th Gen).

Q: How do their average benchmark scores compare?

A: The Core i9-11900T has an average benchmark score of 4685, while the Core i9-10900 averages 4614. Both sit at the 58th percentile among all CPUs.

Q: Which processor supports PCIe Gen 4?

A: The Core i9-11900T supports PCIe Gen 4 with 20 CPU lanes, whereas the Core i9-10900 is limited to PCIe Gen 3 with 16 CPU lanes.

Architecture Differences

The two processors represent distinct architectural generations despite sharing the same 14 nm process node and Intel as the foundry. The Core i9-11900T is built on Rocket Lake, while the Core i9-10900 uses Comet Lake. This generational split explains most of the behavioral differences in the data.

Core counts diverge sharply. The Core i9-11900T packs 8 cores and 16 threads, while the Core i9-10900 offers 10 cores and 20 threads. The extra two cores in the Comet Lake part provide a raw multi-threading advantage that shows up consistently across heavy workloads.

Cache hierarchies also differ significantly. The Core i9-11900T features 80 KB of L1 cache per core and 512 KB of L2 per core, with 16 MB of shared L3. The Core i9-10900 counters with 64 KB of L1 per core and 256 KB of L2 per core, but a larger 20 MB shared L3 pool. The Rocket Lake design's larger per-core L1 and L2 caches reflect a more modern core architecture, while the older Comet Lake part compensates with more total L3.

Clock speed strategy differs substantially. The Core i9-11900T runs a 1500 MHz base clock and boosts to 4.90 GHz. The Core i9-10900 starts at 2800 MHz base and reaches 5.20 GHz boost. The Rocket Lake part's much lower base clock aligns with its 35 W TDP, versus the 65 W TDP of the Comet Lake chip.

Memory bandwidth favors the newer part. The Core i9-11900T achieves 51.2 GB/s, while the Core i9-10900 manages 46.9 GB/s, both over dual-channel DDR4. PCIe capabilities also differ: Rocket Lake brings Gen 4 with 20 lanes, while Comet Lake stays on Gen 3 with 16 lanes.

Integrated graphics differ as well. The Core i9-11900T includes UHD Graphics 750, while the Core i9-10900 uses UHD Graphics 630. Neither chip supports ECC memory. Both carry locked multipliers and are classified as end-of-life desktop parts.

Head-to-Head Benchmarks

The benchmark data tells a clear story of trade-offs between architectural efficiency and raw resource count. The Core i9-10900 dominates in multi-core and most single-core tests, while the Core i9-11900T claims a notable win in one specific single-core metric.

Starting with Cinebench R15, the Core i9-10900 scores 1634 in multi-core versus 1572 for the Core i9-11900T, a 3.8% advantage. In single-core R15, the margin is similar at 3.9%, with scores of 230 and 221 respectively. These results establish the Comet Lake part as the overall productivity winner.

Cinebench R20 follows the same pattern. Multi-core results show the Core i9-10900 at 6811 against 6550, again 3.8% ahead. Single-core R20 delivers 961 versus 924, a 3.9% gap. The consistency across R15 and R20 suggests a stable architectural difference rather than workload-specific variance.

Cinebench R23 confirms the trend. Multi-core scores are 16219 for the Core i9-10900 and 15596 for the Core i9-11900T, maintaining the 3.8% delta. Single-core R23 shows 2289 versus 2201, another 3.8% gap. The uniformity of these deltas across all Cinebench versions indicates the extra two cores provide a fixed throughput advantage.

Geekbench multi-core continues the pattern: the Core i9-10900 scores 8585 versus 8257 for the Core i9-11900T, a 3.8% lead. This consistency across entirely different benchmark suites reinforces that the Core i9-10900 holds a reliable multi-threaded edge.

The single outlier is Geekbench single-core. Here, the Core i9-11900T scores 2157 against the Core i9-10900's 1651, a massive 30.6% advantage. This result stands in stark contrast to the Cinebench single-core tests, where the Core i9-10900 led by roughly 4%. The Geekbench single-core test evidently leverages the Rocket Lake architecture's newer core design in ways that Cinebench does not.

Overall, the scoreboard shows 7 wins for the Core i9-10900 and 1 win for the Core i9-11900T. The Core i9-10900's victories are narrow but consistent, while the Core i9-11900T's single win is dramatic in magnitude. Average benchmark scores reflect this mixed picture: 4685 for the Rocket Lake part versus 4614 for Comet Lake, a difference of about 1.5%.

Specification Differences

The two processors diverge on nearly every major specification category. Core count differs: 8 cores for the Core i9-11900T versus 10 for the Core i9-10900, with corresponding thread counts of 16 and 20.

Clock speeds show a stark split. The Core i9-11900T operates at 1500 MHz base and 4.90 GHz boost. The Core i9-10900 runs at 2800 MHz base and 5.20 GHz boost. The base clock difference is particularly notable, with the Comet Lake part nearly doubling the Rocket Lake chip's base frequency.

Thermal design power differs by 30 W: 35 W for the Core i9-11900T versus 65 W for the Core i9-10900. This explains the lower base clock and suggests the Rocket Lake part targets efficiency-constrained systems.

Cache configurations are distinct. The Core i9-11900T offers 80 KB L1 per core and 512 KB L2 per core, with 16 MB shared L3. The Core i9-10900 provides 64 KB L1 per core and 256 KB L2 per core, with 20 MB shared L3. The die size for the Core i9-11900T is 276 mm², while the Core i9-10900's die size is not listed.

Memory bandwidth favors the Rocket Lake part: 51.2 GB/s versus 46.9 GB/s. PCIe generation and lane count also differ: Gen 4 with 20 lanes for the Core i9-11900T, Gen 3 with 16 lanes for the Core i9-10900.

Integrated graphics differ as noted: UHD Graphics 750 versus UHD Graphics 630. Release dates and launch MSRPs also differ: the Core i9-11900T launched on 2021-03-15 with a $439 launch MSRP, while the Core i9-10900 launched on 2020-04-29 with a $483 launch MSRP. Part numbers are SRKNQ for the Core i9-11900T and SRH8Z for the Core i9-10900.

The Verdict

The data presents a clear choice based on workload priorities. The Intel Core i9-10900 is the superior processor for multi-threaded applications, winning every multi-core benchmark by a consistent 3.8% margin. Its 10 cores and 20 threads provide a tangible advantage in rendering, compilation, and other heavily parallel tasks. The Cinebench R23 multi-core score of 16219 versus 15596 translates to real throughput gains for users who regularly push all cores.

For single-threaded performance, the picture is more nuanced. The Core i9-10900 wins all three Cinebench single-core tests by roughly 4%, but the Core i9-11900T wins Geekbench single-core by 30.6%. This suggests the Rocket Lake architecture excels in certain single-threaded workloads, particularly those that align with Geekbench's testing methodology. Users running applications that mirror Geekbench's patterns might see substantial benefits from the Core i9-11900T.

Efficiency favors the Core i9-11900T. Its 35 W TDP versus 65 W for the Core i9-10900 indicates significantly lower power draw, suitable for compact builds or systems with limited cooling. The newer PCIe Gen 4 support and higher memory bandwidth also give the Rocket Lake part future-proofing advantages in storage and GPU connectivity.

The Core i9-10900 is the safer pick for general productivity and multi-core workloads. Its consistent wins across Cinebench and Geekbench multi-core tests, combined with higher boost clocks, make it the practical choice for users who need predictable performance across diverse applications. The 10-core configuration provides headroom that the 8-core Rocket Lake part cannot match.

The Core i9-11900T appeals to a narrower audience: those prioritizing single-threaded Geekbench-style performance, lower power consumption, or PCIe Gen 4 connectivity. Its 30.6% Geekbench single-core victory is remarkable and indicates strong architectural efficiency, but it cannot overcome the multi-core deficit in most real-world scenarios.

Given 7 benchmark wins for the Core i9-10900 versus 1 for the Core i9-11900T, and the consistency of the Core i9-10900's margins, the data recommends the Core i9-10900 for most buyers. The Core i9-11900T's advantages are specific and situational, making it a niche option rather than a general-purpose recommendation.