Intel Core i5-1340P vs Intel Core i9-9900KS Comparison

Head-to-Head Benchmarks

The head-to-head data is unusually one-sided. Across all six shared benchmark tests, the Intel Core i9-9900KS wins every single matchup. The margins are consistent, hovering in a narrow band between 4.5% and 4.7%. In Cinebench R15 multi-core, the i9-9900KS scores 1657 against 1584 for the i5-1340P, a 4.6% advantage. The single-core R15 result tells a similar story: 233 versus 223, a 4.5% lead. This pattern repeats in Cinebench R20, where the i9-9900KS posts 6907 multi-core and 974 single-core, while the i5-1340P manages 6600 and 931 respectively, both 4.7% and 4.6% gaps. The newest Cinebench R23 test shows the same spread: 16446 versus 15716 in multi-core, and 2321 versus 2218 in single-core, both 4.6% deltas.

What stands out is the uniformity of the advantage. The i9-9900KS does not merely edge ahead in one workload; it maintains a nearly identical percentage lead regardless of thread count or render complexity. This suggests a fundamental throughput edge rather than a workload-specific quirk. The average benchmark score reinforces this: the i9-9900KS sits at 4738, while the i5-1340P averages 4545. The i9-9900KS also holds a higher percentile rank among all CPUs at 59, compared to 58 for the i5-1340P. The gap is small in percentile terms, but the trend is clear across every recorded metric.

The 3DMark results for the i9-9900KS provide additional context, though no direct head-to-head exists for those tests. The i9-9900KS scores 7376 in the 16-thread test and 7360 at max threads, showing near-linear scaling from 8 to 16 threads. Its 4-thread score of 3276 and 8-thread score of 5787 indicate strong scaling through the core count. The i5-1340P has no recorded 3DMark scores in the database, so direct comparison on that suite is impossible, but the Cinebench results are consistent enough to draw conclusions.

Architecture Differences

The two processors come from different eras and design philosophies. The i9-9900KS uses the Coffee Lake architecture on a 14 nm process, with the Coffee Lake-R codename. It is a desktop part built for Intel Socket 1151. The i5-1340P belongs to the Raptor Lake generation, specifically Raptor Lake-P, fabricated on a 10 nm node and designed for mobile platforms with Intel BGA 1744. The process node difference is significant: 14 nm versus 10 nm, which partially explains how the newer part achieves comparable performance at a fraction of the power envelope.

Core configurations diverge sharply. The i9-9900KS packs 8 cores and 16 threads, all of them full-sized performance cores. The i5-1340P has 12 cores and 16 threads, indicating a hybrid layout that mixes performance and efficiency cores. The database records 12 cores and 16 threads for the i5-1340P, which implies some cores lack hyper-threading, a hallmark of Intel's hybrid architecture. This core count advantage does not translate into a performance win, as the i9-9900KS still leads by 4.6% in multi-core Cinebench R23.

Cache hierarchies differ in structure. The i9-9900KS has 64 KB of L1 per core, 256 KB of L2 per core, and 16 MB of shared L3. The i5-1340P has 80 KB of L1 per core, a much larger 2 MB of L2 per core, and 12 MB of shared L3. The larger per-core L2 on the i5-1340P is notable; it suggests the efficiency cores and performance cores have different cache allocations, but the total L3 pool is smaller. Die size information exists only for the i9-9900KS at 180 mm²; the i5-1340P die size is not recorded.

Connectivity and memory support also separate the two. The i9-9900KS supports DDR4 memory on a dual-channel bus with a measured bandwidth of 42.7 GB/s. The i5-1340P supports both DDR4 and DDR5, also dual-channel, but its memory bandwidth is not recorded in the database. PCIe capabilities differ: the i9-9900KS offers Gen 3 with 16 lanes from the CPU, while the i5-1340P provides Gen 4 with 20 lanes. The newer part has a clear advantage in I/O bandwidth and lane count, which matters for storage and GPU connectivity in mobile designs.

Integrated graphics differ as well. The i9-9900KS ships with UHD 630, while the i5-1340P includes Iris Xe Graphics 80EU, a substantially more capable iGPU for media and light gaming. The i5-1340P also has a locked multiplier, whereas the i9-9900KS is multiplier unlocked, allowing overclocking on the desktop platform. Production status separates them further: the i9-9900KS is end-of-life, while the i5-1340P remains active.

Where Each One Wins

The i9-9900KS wins every recorded benchmark head-to-head, but the wins are not uniform in their practical implications. In multi-threaded rendering, the i9-9900KS leads by 4.6% in Cinebench R15, 4.7% in R20, and 4.6% in R23. These are consistent, repeatable advantages that would matter for sustained CPU rendering workloads. The i9-9900KS also wins single-thread tests by 4.5% to 4.6% across all three Cinebench versions. For legacy applications that rely on single-core performance, the older desktop chip still holds a measurable edge.

The i5-1340P's wins are not in benchmark scores but in platform attributes. It supports DDR5 memory, which the i9-9900KS cannot use. It has PCIe Gen 4 with 20 lanes versus Gen 3 with 16 lanes, offering more bandwidth for modern NVMe drives and discrete GPUs. Its 10 nm process and 28 W TDP make it suitable for thin-and-light laptops, whereas the 127 W TDP of the i9-9900KS demands a desktop cooling solution. The i5-1340P also has a newer integrated GPU, Iris Xe Graphics 80EU, which outperforms the older UHD 630 for tasks like video encoding and casual gaming without a discrete GPU.

For raw CPU throughput, the i9-9900KS is the clear winner based on recorded data. For platform flexibility, power efficiency, and modern I/O, the i5-1340P has advantages that no benchmark in this database directly measures. The 3DMark suite shows the i9-9900KS scaling well from 2 threads (1670) to max threads (7360), but the i5-1340P has no comparable data, leaving that comparison incomplete.

Specification Differences

The two CPUs differ in nearly every fundamental specification. Core count: 8 versus 12. Thread count is identical at 16. Base clock: 4.00 GHz for the i9-9900KS versus 1900.00 MHz for the i5-1340P, a massive difference in rated base frequency. Boost clock: 5.00 GHz versus 4.60 GHz, favoring the desktop chip. TDP: 127 W versus 28 W, a 99 W gap that reflects the mobile versus desktop design targets. Socket: Intel Socket 1151 versus Intel BGA 1744, which means they are not interchangeable in any system.

Architecture generation: Coffee Lake Refresh versus Raptor Lake-P. Process node: 14 nm versus 10 nm. Memory support: DDR4 only versus DDR4 and DDR5. Memory bandwidth: 42.7 GB/s recorded for the i9-9900KS, not recorded for the i5-1340P. PCIe: Gen 3 with 16 lanes versus Gen 4 with 20 lanes. Integrated graphics: UHD 630 versus Iris Xe Graphics 80EU. Market segment: Desktop versus Mobile. Production status: End-of-life versus Active. Release date: 2019-10-27 versus 2023-01-03. Launch MSRP: the i9-9900KS launched at $513, the i5-1340P at $353. Multiplier: unlocked versus locked. Part numbers: SRG1Q versus SRMJ7.

L1 cache differs: 64 KB per core versus 80 KB per core. L2 cache differs substantially: 256 KB per core versus 2 MB per core. L3 cache: 16 MB shared versus 12 MB shared. Die size: 180 mm² for the i9-9900KS, unrecorded for the i5-1340P. ECC memory support is false for both. The i9-9900KS has a recorded transistor count of null; the i5-1340P also has null, so no comparison is possible there.

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The Intel Core i9-9900KS scores 16446, which is 4.6% ahead of the i5-1340P's 15716.

Q: Does the i5-1340P win any benchmark in the head-to-head comparison?

A: No. The i9-9900KS wins all six head-to-head tests, with deltas ranging from 4.5% to 4.7%.

Q: What memory types does each CPU support?

A: The i9-9900KS supports DDR4 only. The i5-1340P supports both DDR4 and DDR5.

Q: Are these CPUs compatible with the same motherboard?

A: No. The i9-9900KS uses Intel Socket 1151, while the i5-1340P uses Intel BGA 1744.

Q: Which processor has a higher boost clock?

A: The i9-9900KS boosts to 5.00 GHz, while the i5-1340P boosts to 4.60 GHz.

Q: What is the TDP difference between the two?

A: The i9-9900KS has a TDP of 127 W, while the i5-1340P has a TDP of 28 W.

The Verdict

The benchmark data is unambiguous: the Intel Core i9-9900KS outperforms the Intel Core i5-1340P in every recorded CPU test. The margins are narrow but consistent, ranging from 4.5% to 4.7% across all six Cinebench comparisons. The i9-9900KS also holds a higher average benchmark score (4738 versus 4545) and a higher percentile rank (59 versus 58). Anyone selecting purely on raw compute performance should choose the i9-9900KS, provided they can accommodate its desktop socket, 127 W TDP, and end-of-life status.

The i5-1340P is not without merit, but its advantages lie outside the recorded benchmark suite. It supports DDR5 memory, offers PCIe Gen 4 with 20 lanes, draws only 28 W, and includes a newer Iris Xe Graphics 80EU iGPU. Its 10 nm process and mobile BGA 1744 socket make it the only viable choice for thin laptops. The i9-9900KS cannot be used in such systems at all. The i5-1340P also remains active in production, whereas the i9-9900KS is end-of-life.

The data suggests a clear split: the i9-9900KS for desktop users who want maximum CPU throughput and have the power budget and cooling to support it, the i5-1340P for mobile users who need modern platform features and efficiency. The i9-9900KS wins the performance war by a small but consistent margin. The i5-1340P wins the platform war on connectivity, memory support, and power efficiency. Neither chip dominates the other across all dimensions; the right choice depends entirely on the use case. The recorded benchmarks answer the performance question decisively, but the unmeasured platform attributes give the i5-1340P a compelling case for portable systems.