Intel Core i9-14900KS vs Intel Core Ultra 9 285K Comparison

The Intel Core Ultra 9 285K and Intel Core i9-14900KS represent two distinct approaches to high-end desktop computing, with benchmark data revealing a clear trade-off between raw multi-threaded throughput and legacy single-thread performance. The Core Ultra 9 285K, built on Arrow Lake, wins 14 of the 19 head-to-head benchmark comparisons, while the Core i9-14900KS, a Raptor Lake Refresh part, takes the remaining 5. This split is not arbitrary; it reflects fundamental architectural shifts that favor the newer processor in most modern workloads, but leaves a specific, notable gap in older rendering tests.

The Verdict

The benchmark data points to a clear recommendation: the Intel Core Ultra 9 285K is the superior processor for the vast majority of compute-heavy tasks. Its 14 wins out of 19 head-to-head benchmarks include decisive victories in multi-core rendering, encryption, and floating-point math, establishing it as the stronger all-around performer. The Core i9-14900KS, however, retains a significant edge in a narrow set of single-threaded tests, particularly in Cinebench R15 and R23, where its scores are dramatically higher. For users whose primary applications are older versions of Cinebench or rely heavily on that specific benchmark's execution path, the 14900KS may still be the better choice. For everyone else, the data indicates the Core Ultra 9 285K delivers more consistent, broader performance, despite having a lower launch MSRP of $589 compared to the 14900KS's $689.

The average benchmark scores reinforce this verdict. The Core Ultra 9 285K achieves an average benchmark score of 83807, placing it 3.3% above the Core i9-14900KS's average of 81127. Both processors sit in the 96th percentile of all CPUs, but the Ultra 9's higher average score and greater number of wins suggest it is the more versatile and future-proof option. The 285K's nearest rival is the Intel Core Ultra 9 290K Plus, which scores 84003, a delta of -0.2%, indicating the 285K is already at the top of its performance class. The 14900KS, by contrast, is essentially tied with the Intel Xeon w5-3535X, which scores 81115 with a delta of 0%.

Architecture Differences

The two processors are built on fundamentally different architectures and manufacturing processes. The Core Ultra 9 285K uses the Arrow Lake architecture on a 3 nm process node fabricated by TSMC, while the Core i9-14900KS uses the Raptor Lake architecture on a 10 nm process node fabricated by Intel. This process advantage is a key differentiator, allowing the 285K to pack 17,800 million transistors into a 243 mm² die, whereas the 14900KS has a slightly larger 257 mm² die with no listed transistor count. The shift to a smaller, more advanced node likely explains the 285K's superior performance-per-watt in many workloads.

Core configuration also differs significantly. Both have 24 cores, but the 285K offers 24 threads, indicating it does not use Hyper-Threading. The 14900KS, however, provides 32 threads, meaning it supports simultaneous multi-threading. This 8-thread difference is crucial: the 14900KS relies on additional threads to boost its multi-core scores, while the 285K achieves its performance through raw core efficiency and architectural improvements. Cache layouts also differ, with the 285K featuring 192 KB of L1 cache per core and 3 MB of L2 cache per core, compared to the 14900KS's 80 KB of L1 and 2 MB of L2 per core. Both share a 36 MB L3 cache.

Memory support is another divergence. The 285K supports only DDR5 memory with a dual-channel bus and a listed memory bandwidth of 102.4 GB/s. The 14900KS supports both DDR4 and DDR5, also on a dual-channel bus, but its memory bandwidth is not listed in the data. The 285K's integrated graphics are Arc Xe-LPG with 64 execution units, while the 14900KS uses the older UHD Graphics 770. Finally, the 285K uses the newer Intel Socket 1851 and offers 20 PCIe Gen 5 lanes from the CPU, whereas the 14900KS uses Intel Socket 1700 with 16 PCIe Gen 5 lanes.

Head-to-Head Benchmarks

The largest victory for the Core Ultra 9 285K is in the Passmark find prime numbers test, where it scores 541 against the 14900KS's 244, a delta of 121.7%. This indicates a massive advantage in integer-heavy, single-threaded math operations. The 285K also dominates in floating-point math, scoring 224324 versus 153975, a 45.7% improvement. In extended instructions, the 285K leads with 62277 against 45524, a 36.8% delta, and in data encryption, it wins 57745 to 47717, a 21% advantage. Multi-core rendering in Cinebench R15 also favors the 285K, with a score of 6494 versus 5140, a 26.3% delta.

The Core i9-14900KS's wins are concentrated in a few specific tests. Its most dramatic victory is in Cinebench R23 single-core, where it scores 7199 against the 285K's 2377, a delta of -67%. This is a massive disparity, suggesting the 14900KS has a significant clock-speed advantage in this particular workload, likely due to its 6.20 GHz boost clock. Similarly, in Cinebench R15 single-core, the 14900KS scores 725 versus 359, a -50.5% delta. It also wins Cinebench R23 multi-core, scoring 50995 versus 42522, a -16.6% delta, which is surprising given the 285K's other multi-core wins. The 14900KS also edges out the 285K in Passmark integer math (212644 vs 172379, -18.9% delta) and data compression (803368 vs 790052, -1.7% delta).

Other notable wins for the 285K include Cinebench R20 multi-core (24003 vs 21417, 12.1% delta) and single-core (3388 vs 3023, 12.1% delta), Geekbench multi-core (26702 vs 23931, 11.6% delta) and single-core (2870 vs 2692, 6.6% delta), and Passmark multithread (67260 vs 60012, 12.1% delta). The 285K also wins in Passmark physics (3938 vs 3381, 16.5% delta), random string sorting (94927 vs 89789, 5.7% delta), and single-thread tests (5087 vs 4815, 5.6% delta).

Specification Differences

The specification sheets reveal a clear generational split. The Core Ultra 9 285K has a base clock of 3.70 GHz and a boost clock of 5.70 GHz, while the Core i9-14900KS has a lower base clock of 3.20 GHz but a higher boost clock of 6.20 GHz. The 285K has a TDP of 125 watts, lower than the 14900KS's 150 watts, indicating better power efficiency. The 285K is built on a 3 nm process by TSMC, while the 14900KS uses Intel's 10 nm process. The 285K has 24 cores and 24 threads, whereas the 14900KS has 24 cores and 32 threads. The 285K offers 20 PCIe Gen 5 lanes, while the 14900KS offers 16. The 285K uses DDR5 memory only, while the 14900KS supports both DDR4 and DDR5. The integrated graphics differ, with the 285K using Arc Xe-LPG 64EU and the 14900KS using UHD Graphics 770. The launch MSRP is $589 for the 285K and $689 for the 14900KS. The release dates also differ, with the 285K launching on 2024-10-23 and the 14900KS on 2024-03-13.

FAQ

Q: Which processor has more threads?

A: The Intel Core i9-14900KS has 32 threads, while the Intel Core Ultra 9 285K has 24 threads, despite both having 24 cores.

Q: Why does the Core i9-14900KS win in Cinebench R23 multi-core?

A: The 14900KS scores 50995 in Cinebench R23 multi-core versus the 285K's 42522, a -16.6% delta. This suggests its 32 threads and higher 6.20 GHz boost clock provide an advantage in this specific workload, despite the 285K winning other multi-core tests.

Q: Which processor has a higher boost clock?

A: The Intel Core i9-14900KS has a higher boost clock of 6.20 GHz, compared to the Intel Core Ultra 9 285K's 5.70 GHz.

Q: Is the Core Ultra 9 285K more power-efficient?

A: Yes, the Core Ultra 9 285K has a TDP of 125 watts, which is lower than the Core i9-14900KS's 150 watts.

Q: Which processor supports more PCIe lanes?

A: The Intel Core Ultra 9 285K supports 20 PCIe Gen 5 lanes from the CPU, while the Intel Core i9-14900KS supports 16.

Q: What is the average benchmark score difference between the two?

A: The Core Ultra 9 285K has an average benchmark score of 83807, which is 3.3% higher than the Core i9-14900KS's average score of 81127.

Where Each One Wins

The Intel Core Ultra 9 285K is the clear winner in workloads that leverage its architectural strengths. It dominates in Passmark floating-point math (224324 vs 153975), extended instructions (62277 vs 45524), and find prime numbers (541 vs 244). It also wins in data encryption (57745 vs 47717), Passmark multithread (67260 vs 60012), and physics (3938 vs 3381). For users running modern multi-threaded applications, compression, encryption, or scientific computing that relies on floating-point operations, the 285K is the stronger choice. Its wins in Geekbench multi-core and single-core, as well as Cinebench R20, indicate broad applicability across general productivity and rendering tasks. The 285K also wins in Passmark random string sorting and single-thread tests, showing it is not just a multi-core monster but also a capable single-threaded performer in many contexts.

The Intel Core i9-14900KS's wins are more specialized. Its most significant victories are in Cinebench R15 single-core (725 vs 359) and Cinebench R23 single-core (7199 vs 2377), where its high boost clock provides a massive edge. It also wins Cinebench R23 multi-core (50995 vs 42522), which may be relevant for users who use this specific benchmark version as a proxy for rendering performance. Additionally, it wins in Passmark integer math (212644 vs 172379) and data compression (803368 vs 790052). These wins suggest the 14900KS is preferable for workloads that are heavily dependent on high clock speeds and integer arithmetic, such as certain legacy software or specific compression algorithms. However, given the 285K's 14 wins versus the 14900KS's 5 wins, the data overwhelmingly favors the newer Arrow Lake processor for most users.