Intel Core i7-14700HX vs Intel Core i9-12900KS Comparison

The Intel Core i7-14700HX and Intel Core i9-12900KS represent two distinct interpretations of high-end x86 performance, separated by market segment and generation. The i7-14700HX is a mobile-first Raptor Lake-HX Refresh part with 20 cores and a 55 W TDP, while the i9-12900KS is a desktop Alder Lake-S special edition with 16 cores and a 150 W TDP. Benchmark results show the desktop chip winning 17 of 19 head-to-head comparisons, yet the mobile chip claims two specific victories that reveal a more nuanced picture than a simple scoreboard suggests.

Where Each One Wins

The i9-12900KS dominates the broad performance landscape, winning across Cinebench, Geekbench, and nearly every PassMark workload. Its most decisive victories come in single-threaded and lightly-threaded tasks: the Cinebench R23 single-core test shows a 59.6% advantage (5203 vs 2103), and Cinebench R15 single-core shows a 43.5% margin (524 vs 296). These are not marginal differences; they indicate a fundamental gap in per-core execution efficiency that the mobile chip cannot bridge despite its higher core count.

The i7-14700HX wins only two tests, but they are instructive. In Cinebench R15 multi-core, it scores 3812 against 3715, a 2.6% edge. In PassMark find prime numbers, it scores 165 against 158, a 4.4% advantage. The prime number test is a classic integer workload that scales with core count and cache efficiency, and the i7's 20 cores and 33 MB L3 cache (versus 16 cores and 30 MB) appear to give it a slight edge in this specific pattern. The R15 multi-core win is similarly telling: at lower thread counts where memory bandwidth is less of a bottleneck, the i7's extra cores can assert themselves.

For workloads that stress sustained multi-threaded throughput, the i9-12900KS is clearly superior. The Cinebench R23 multi-core result shows a 33.3% lead (36859 vs 24595), and Geekbench multi-core shows a 22.4% lead (18538 vs 14390). The i9 also wins PassMark multi-thread by 16.3% (43698 vs 36566). The pattern is consistent: the desktop processor wins where power delivery and thermal headroom allow sustained boost, while the mobile chip only wins in niche scenarios where its additional cores and larger shared cache compensate for its lower clock ceiling.

Architecture Differences

The two processors share Intel's 10 nm process node and both use the hybrid performance-core/efficiency-core design, but the specifics diverge. The i7-14700HX is built on Raptor Lake-HX, a refresh of the Raptor Lake architecture, with a die size of 257 mm². The i9-12900KS uses Alder Lake-S, the original hybrid architecture, with a smaller die at 215 mm². Both have 80 KB L1 cache per core, but the L2 cache differs: the i7 has 2 MB per core, while the i9 has 1.25 MB per core. This means the i7's per-core L2 is 60% larger, which can help with frequently accessed data.

The L3 cache also differs: the i7 has 33 MB shared, the i9 has 30 MB shared, a 10% advantage for the mobile part. The i7 has 20 cores and 28 threads, while the i9 has 16 cores and 24 threads. The i7's core count advantage is 25%, and its thread advantage is approximately 16.7%. However, the i9 compensates with a higher base clock (3.40 GHz vs 2.10 GHz), while both share the same 5.50 GHz boost clock. The i9's TDP of 150 W is nearly three times the i7's 55 W, which explains the sustained performance gap in heavy workloads.

Both support DDR4 and DDR5 memory with dual-channel buses, and both have ECC memory support. The i9 lists a memory bandwidth of 76.8 GB/s, while the i7 does not specify a figure. Both use Gen 5 PCIe with 16 CPU lanes, both integrate UHD Graphics 770, and both have unlocked multipliers. The sockets differ fundamentally: the i7 uses Intel BGA 1964 (mobile), while the i9 uses Intel Socket 1700 (desktop). This is not a minor detail; it determines whether the chip can be upgraded or replaced independently of the motherboard.

The Verdict

The data is unequivocal on raw performance: the i9-12900KS is the faster processor in nearly every measurable way. Its 59.6% single-core lead in Cinebench R23 and 33.3% multi-core lead in the same test are decisive. For any workload that benefits from high per-core clocks or sustained multi-threaded throughput, the i9 is the correct choice. Its wins in PassMark integer math (147575 vs 131296, an 11% lead) and floating-point math (111429 vs 93836, a 15.8% lead) confirm that even in non-synthetic tasks, the desktop part holds a clear advantage.

The i7-14700HX is not without merit. Its wins in Cinebench R15 multi-core and PassMark find prime numbers show that its additional cores and larger cache can matter in specific workloads. But these are narrow margins (2.6% and 4.4%, respectively) compared to the i9's double-digit leads elsewhere. The i7's 89th percentile ranking among all CPUs matches the i9's 89th percentile, and its average benchmark score of 45953 is actually higher than the i9's 45094, driven by the mobile chip's performance in a broader benchmark suite. This suggests that in a mixed workload environment, the i7 is more well-rounded, even if it loses in direct head-to-head comparisons.

The choice comes down to platform and use case. If the task is desktop-centric and power is not a constraint, the i9-12900KS is the obvious pick. If the requirement is a mobile system that can deliver competitive performance in a 55 W envelope, the i7-14700HX is the only one of the two that fits. The i9's 150 W TDP and Socket 1700 make it unsuitable for laptops, while the i7's BGA 1964 socket makes it unsuitable for desktop upgrades.

FAQ

Q: Which processor has more cores?

A: The Intel Core i7-14700HX has 20 cores and 28 threads, while the Intel Core i9-12900KS has 16 cores and 24 threads. The i7 has 4 more cores and 4 more threads.

Q: Is the i9-12900KS faster in single-core performance?

A: Yes. In Cinebench R23 single-core, the i9 scores 5203 versus 2103 for the i7, a 59.6% advantage. In Geekbench single-core, the i9 leads by 12.1% (2408 vs 2116).

Q: Does the i7-14700HX win any benchmark?

A: Yes, it wins two head-to-head tests: Cinebench R15 multi-core (3812 vs 3715, a 2.6% lead) and PassMark find prime numbers (165 vs 158, a 4.4% lead).

Q: What is the memory bandwidth of the i9-12900KS?

A: The i9-12900KS lists a memory bandwidth of 76.8 GB/s. The i7-14700HX does not have a specified memory bandwidth in the data.

Q: Do both processors support ECC memory?

A: Yes, both the i7-14700HX and the i9-12900KS support ECC memory. Both also support DDR4 and DDR5, and both use a dual-channel memory bus.

Q: Which chip has a larger L3 cache?

A: The i7-14700HX has 33 MB of shared L3 cache, while the i9-12900KS has 30 MB. The i7 also has a larger per-core L2 cache at 2 MB versus 1.25 MB.

Head-to-Head Benchmarks

The most lopsided result is Cinebench R23 single-core, where the i9-12900KS scores 5203 against 2103 for the i7-14700HX, a delta of 59.6%. This is the largest margin in the entire comparison and highlights the i9's superior per-core execution. Cinebench R15 single-core follows with a 43.5% delta (524 vs 296). These single-threaded gaps are consistent across all test suites: Geekbench single-core shows a 12.1% delta (2408 vs 2116), and PassMark single-thread shows an 8.8% delta (4330 vs 3947).

In multi-core workloads, the i9's advantage is smaller but still substantial. Cinebench R23 multi-core shows a 33.3% delta (36859 vs 24595), while Cinebench R20 multi-core shows a 15.6% delta (15480 vs 13059). Geekbench multi-core shows a 22.4% delta (18538 vs 14390), and PassMark multi-thread shows a 16.3% delta (43698 vs 36566). The i9 also wins PassMark data compression by 22.2% (563709 vs 438539) and PassMark data encryption by 16.9% (31403 vs 26092).

The two i7 wins are narrow. Cinebench R15 multi-core shows a 2.6% delta (3812 vs 3715), and PassMark find prime numbers shows a 4.4% delta (165 vs 158). In the remaining PassMark tests, the i9 leads by margins ranging from 7.6% (physics, 2437 vs 2252) to 26.7% (extended instructions, 35089 vs 25718). The i9 also wins PassMark integer math by 11% (147575 vs 131296) and floating-point math by 15.8% (111429 vs 93836). Random string sorting goes to the i9 by 19.8% (60539 vs 48544).

Specification Differences

The core and thread counts differ: the i7-14700HX has 20 cores and 28 threads, while the i9-12900KS has 16 cores and 24 threads. The base clock differs significantly: the i7 runs at 2.10 GHz, the i9 at 3.40 GHz. Both share the same boost clock of 5.50 GHz. The TDP is a major differentiator: the i7 is rated at 55 W, the i9 at 150 W. The sockets are incompatible: the i7 uses Intel BGA 1964, the i9 uses Intel Socket 1700.

The L2 cache per core is 2 MB for the i7 and 1.25 MB for the i9. The L3 cache is 33 MB shared for the i7 and 30 MB shared for the i9. The die size differs: the i7 measures 257 mm², the i9 measures 215 mm². The architecture names differ: Raptor Lake-HX for the i7, Alder Lake-S for the i9. The release dates differ: the i7 was released on 2024-01-07, the i9 on 2022-04-04. The i9 has a launch MSRP of $739, while the i7 has no launch MSRP listed. Both have unlocked multipliers, both use Gen 5 PCIe with 16 lanes, and both integrate UHD Graphics 770. The market segments are distinct: mobile for the i7, desktop for the i9.