Intel Core i9-12900T vs Intel Core i9-13900HK Comparison

The Intel Core i9-13900HK and Intel Core i9-12900T represent two distinct interpretations of high-end Intel silicon, yet the benchmark data presents an unexpected outcome. The mobile Raptor Lake-H chip, despite its newer generation and higher boost clock, is consistently outpaced by the previous-generation desktop Alder Lake-S part across nearly every measured workload. The head-to-head results show the i9-12900T winning 14 of the 17 comparisons, with the i9-13900HK taking only three — two of which are ties in single-thread PassMark tests. This is not a close contest; it is a systematic advantage for the desktop part, driven by core count and thermal headroom.

Head-to-Head Benchmarks

The most dramatic separation occurs in Cinebench R23 multi-core, where the i9-12900T scores 24,528 against the i9-13900HK’s 16,025. That is a 34.7% advantage for the desktop chip, the largest margin in the entire comparison. The single-core R23 result is even more lopsided in relative terms: the i9-12900T posts 3,462 versus 1,843.5, a 46.8% lead. These two results alone establish the i9-12900T as the superior rendering and general-purpose processor, but the pattern holds elsewhere.

Cinebench R20 multi-core shows the i9-12900T ahead by 7.3% (10,301 vs 9,548), and R20 single-core sees a 7.4% edge (1,454 vs 1,347). The older R15 test tells a similar story: the i9-12900T wins multi-core by 3% (2,472 vs 2,398) and single-core by a substantial 24.4% (348 vs 263). The single-core R15 gap is notable because it suggests the i9-13900HK’s 5.40 GHz boost clock is not translating into per-thread performance as effectively as the i9-12900T’s 4.90 GHz.

The PassMark suite reinforces the trend. In integer math, the i9-12900T scores 108,211 versus 94,120 — a 13% advantage. Floating-point math shows a 10.2% gap (75,741 vs 68,020). Data compression favors the i9-12900T by 4.5% (345,021 vs 329,454), and data encryption by 7.5% (20,750 vs 19,198). Extended instructions are close, with the i9-12900T ahead by only 2.6% (20,054 vs 19,534), while prime number finding shows a 5.2% edge (116 vs 110). Random string sorting goes to the i9-12900T by 7.8% (39,771 vs 36,662), and the multi-thread PassMark score favors it by 4.8% (29,601 vs 28,194).

The i9-13900HK’s only outright win comes in PassMark physics, where it scores 1,896 against the i9-12900T’s 1,811 — a 4.7% margin. The two PassMark single-thread tests are exact ties at 3,810, with the winner designation going to the i9-13900HK by virtue of a 0% delta. These results are anomalies in an otherwise dominant performance for the i9-12900T. The mobile chip’s higher boost clock and newer architecture do not overcome the desktop part’s advantages in core count, cache size, or sustained power delivery.

The Verdict

The data is unambiguous: the Intel Core i9-12900T is the faster processor in virtually every benchmark category. Its 16 cores and 24 threads outnumber the i9-13900HK’s 14 cores and 20 threads, and that structural advantage is compounded by a larger 30 MB shared L3 cache versus 24 MB. The i9-12900T’s 35 W TDP, lower than the i9-13900HK’s 45 W, suggests it achieves this performance while drawing less power — a remarkable outcome given the desktop part’s size and socket requirements.

The i9-13900HK’s case rests on its mobile form factor. It uses the Intel BGA 1744 socket, making it suitable for laptops, while the i9-12900T uses Intel Socket 1700 for desktops. The i9-13900HK also integrates Iris Xe Graphics 96EU, whereas the i9-12900T uses UHD Graphics 770. For users building or upgrading a desktop system, the i9-12900T is the clear choice based on raw performance. For those who need a laptop processor, the i9-13900HK is the only option between the two, but the benchmark results indicate a significant performance sacrifice relative to the desktop part.

Where Each One Wins

The i9-12900T wins in every compute-heavy scenario except one. Rendering in Cinebench R23, R20, and R15 all favor it by margins ranging from 3% to 46.8%. Data compression, encryption, integer and floating-point math, prime number finding, and random string sorting all go to the i9-12900T with margins between 2.6% and 13%. For workloads like video encoding, 3D rendering, scientific computing, or database operations, the i9-12900T is the superior choice by a wide margin.

The i9-13900HK’s wins are narrow and niche. Its 4.7% advantage in PassMark physics suggests a slight edge in certain physics simulation workloads, though this is a single data point. The two tied PassMark single-thread results at 3,810 indicate that in purely single-threaded tasks, the two chips are equivalent — the i9-13900HK’s higher boost clock compensates for other architectural differences. The mobile chip’s integrated Iris Xe Graphics 96EU may also appeal to users who need better iGPU performance without a discrete card, though the i9-12900T’s UHD Graphics 770 is adequate for basic display output.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-12900T has 16 cores and 24 threads, while the Intel Core i9-13900HK has 14 cores and 20 threads.

Q: How large is the performance gap in multi-core rendering?

A: In Cinebench R23 multi-core, the i9-12900T scores 24,528 versus the i9-13900HK’s 16,025, a 34.7% advantage for the desktop part.

Q: Are the single-threaded scores similar?

A: The PassMark single-thread scores are identical at 3,810 for both processors, but in Cinebench R23 single-core, the i9-12900T leads by 46.8% (3,462 vs 1,843.5).

Q: What is the TDP difference between the two?

A: The i9-13900HK has a 45 W TDP, while the i9-12900T has a 35 W TDP.

Q: Which processor supports PCIe Gen 5 with more lanes?

A: The i9-12900T supports Gen 5 with 20 lanes (CPU only), whereas the i9-13900HK supports Gen 5 with 8 lanes (CPU only).

Q: Do both processors support the same memory types?

A: Yes, both support DDR4 and DDR5 memory with dual-channel buses.

Architecture Differences

The two processors come from different Intel generations and are built for different segments. The i9-13900HK uses the Raptor Lake architecture, specifically the Raptor Lake-H codename, and is fabricated on a 10 nm process at Intel’s foundry. Its die size is 257 mm². The i9-12900T uses the Alder Lake architecture, with the Alder Lake-S codename, also on a 10 nm process, but with a smaller die size of 215 mm². Both are produced by Intel.

Core configuration is the most significant architectural difference. The i9-12900T has 16 cores and 24 threads, while the i9-13900HK has 14 cores and 20 threads. The L1 cache is identical at 80 KB per core for both. L2 cache differs: the i9-13900HK has 2 MB per core, while the i9-12900T has 1.25 MB per core. L3 cache is larger on the desktop part: 30 MB shared versus 24 MB shared.

Clock speeds and power draw also differ markedly. The i9-13900HK has a base clock of 2.60 GHz and a boost clock of 5.40 GHz, with a 45 W TDP. The i9-12900T has a base clock of 1400.00 MHz (1.40 GHz) and a boost clock of 4.90 GHz, with a 35 W TDP. The mobile chip’s higher base and boost clocks are insufficient to overcome the desktop part’s core and cache advantages.

Memory support is the same: both support DDR4 and DDR5 with dual-channel buses, and neither supports ECC memory. PCIe connectivity differs, with the i9-12900T offering Gen 5 with 20 lanes (CPU only) versus the i9-13900HK’s Gen 5 with 8 lanes (CPU only). Integrated graphics also differ: the i9-13900HK uses Iris Xe Graphics 96EU, while the i9-12900T uses UHD Graphics 770.

Both processors have unlocked multipliers, indicating overclocking potential, though the mobile i9-13900HK’s BGA 1744 socket limits practical overclocking compared to the desktop i9-12900T’s Socket 1700. The i9-13900HK was released on 2023-01-03 with a launch MSRP of $697, while the i9-12900T was released on 2022-01-03 with a launch MSRP of $489. Both are currently active in production, and both sit at the 85th percentile of all CPUs in the benchmark database. The i9-13900HK has an average benchmark score of 37,425, while the i9-12900T scores 37,112 — a difference of less than 1% in aggregate, despite the i9-12900T’s dominance in individual tests.