Intel Core i5-7400T vs Intel Core i5-8365UE Comparison

The Intel Core i5-8365UE and Intel Core i5-7400T are both 4-core processors from Intel, but they target completely different platforms: one is a low-power mobile chip, the other a desktop part. Benchmark data shows a clear performance hierarchy, but the story is more nuanced than raw scores. The i5-8365UE wins every single head-to-head benchmark recorded, yet both CPUs share the same 36th percentile ranking among all CPUs, indicating they occupy similar overall performance tiers despite the i5-8365UE's consistent lead. This guide breaks down the exact numbers, architectural differences, and which processor makes sense for specific use cases.

Head-to-Head Benchmarks

The i5-8365UE dominates every Cinebench test recorded in the data. In Cinebench R15 multi-core, the i5-8365UE scores 474 against the i5-7400T's 401, a delta of 18.2%. The single-core R15 result follows the same pattern: 66 points for the i5-8365UE versus 56 for the i5-7400T, an 17.9% advantage. This is not a marginal win; it is a consistent, across-the-board lead.

Moving to Cinebench R20, the gap remains nearly identical. The i5-8365UE posts 1978 multi-core points versus 1672 for the i5-7400T, an 18.3% delta. In single-core R20, the i5-8365UE scores 279 against 236, again an 18.2% improvement. The consistency of these deltas—hovering around 18% in every test—suggests the performance difference is structural, not workload-specific.

The newest test in the data, Cinebench R23, confirms the trend. Multi-core scores are 4710 for the i5-8365UE and 3981 for the i5-7400T, an 18.3% delta. Single-core R23 shows 665 versus 562, another 18.3% gap. Across all six recorded benchmarks, the i5-8365UE wins six times, and the i5-7400T wins zero. There is no test in the data where the desktop chip pulls ahead.

The average benchmark scores tell a slightly different story. The i5-8365UE has an average benchmark score of 1362, while the i5-7400T sits at 1348. That is only about a 1% difference in aggregate, which aligns with both CPUs being in the 36th percentile. The head-to-head Cinebench results show a larger gap, but the broader average score suggests that outside of Cinebench, the i5-7400T may close the distance in other workloads. The i5-8365UE's nearest rivals include the Intel Core i5-6500T at 1362 (0% delta) and the Intel Xeon E3-1226 v3 at 1357 (0.4% delta). The i5-7400T's nearest rivals include the Intel Core i5-4670 at 1347 (0% delta) and the Intel Core i5-4590T at 1340 (0.6% delta). Both chips trade blows with similar-era parts.

Architecture Differences

Both processors are built on Intel's 14 nm process node, but that is where the manufacturing similarity ends. The i5-8365UE uses the Whiskey Lake architecture (codename Whiskey Lake-U), while the i5-7400T uses the older Kaby Lake architecture. This generational leap explains much of the performance delta. Whiskey Lake is a refinement of the 14 nm process, offering better efficiency and higher clock speeds under the same thermal envelope.

The core and thread counts differ significantly. The i5-8365UE has 4 cores and 8 threads, while the i5-7400T has 4 cores and 4 threads. Hyper-Threading on the i5-8365UE gives it a substantial advantage in multi-threaded workloads, which is directly visible in the multi-core Cinebench scores. The i5-7400T lacks Hyper-Threading, making it a true quad-core with no simultaneous multi-threading.

Clock speeds also favor the i5-8365UE. Its base clock is 1600 MHz, but it boosts up to 4.10 GHz. The i5-7400T has a higher base clock of 2.40 GHz but a much lower boost clock of 3.00 GHz. The i5-8365UE's ability to boost 1.1 GHz higher explains its single-core dominance in every benchmark. The lower base clock on the i5-8365UE is a trade-off for its 15 W TDP, compared to the i5-7400T's 35 W TDP.

Cache configurations are identical: 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3. Both support DDR4 memory with dual-channel configuration and a memory bandwidth of 38.4 GB/s. Neither supports ECC memory. Both use PCIe Gen 3 with 16 lanes from the CPU. The integrated graphics differ: the i5-8365UE has UHD Graphics 620, while the i5-7400T has HD 630. The sockets are incompatible—the i5-8365UE uses Intel BGA 1528 (mobile), while the i5-7400T uses Intel Socket 1151 (desktop).

The Verdict

The data is unambiguous: the Intel Core i5-8365UE outperforms the Intel Core i5-7400T in every recorded benchmark. If you are choosing purely on performance, the i5-8365UE is the faster part. The 18%+ lead in Cinebench R15, R20, and R23 across both single-core and multi-core tests is a decisive margin. The i5-8365UE's 8 threads versus 4 threads is a key differentiator, and its higher boost clock delivers better single-threaded performance.

However, the platform matters more than the chip. The i5-8365UE is a mobile processor on a BGA 1528 socket, meaning it is soldered to the motherboard. You cannot upgrade it or move it to a different system. The i5-7400T is a desktop part on Socket 1151, which offers more flexibility in system building and future upgrades. If you are building a new desktop, the i5-7400T is the only practical option, despite being slower.

The i5-8365UE's 15 W TDP makes it suitable for thin-and-light laptops or embedded systems where power efficiency is critical. The i5-7400T's 35 W TDP is still low for a desktop part, but it requires a proper cooling solution and a desktop motherboard. The data shows the i5-8365UE is the better performer, but the i5-7400T is the better fit for a traditional desktop PC. Choose based on your platform, not just the benchmark numbers.

FAQ

Q: Which CPU is faster in multi-core workloads?

A: The Intel Core i5-8365UE is faster in every multi-core test. It scores 474 vs 401 in Cinebench R15, 1978 vs 1672 in R20, and 4710 vs 3981 in R23, all with an 18.2-18.3% delta.

Q: Does the i5-8365UE support Hyper-Threading?

A: Yes, the i5-8365UE has 4 cores and 8 threads. The i5-7400T has 4 cores and 4 threads, meaning it does not support Hyper-Threading.

Q: Are these CPUs on the same socket?

A: No. The i5-8365UE uses Intel BGA 1528, which is a soldered mobile socket. The i5-7400T uses Intel Socket 1151, which is a desktop socket.

Q: Which processor has a higher boost clock?

A: The i5-8365UE boosts to 4.10 GHz, while the i5-7400T boosts to 3.00 GHz. The i5-7400T has a higher base clock at 2.40 GHz vs 1.60 GHz.

Q: What is the TDP difference?

A: The i5-8365UE has a 15 W TDP, while the i5-7400T has a 35 W TDP. The i5-8365UE is designed for low-power mobile devices.

Q: How do their average benchmark scores compare?

A: The i5-8365UE has an average benchmark score of 1362, and the i5-7400T has 1348. Both sit in the 36th percentile of all CPUs.

Where Each One Wins

The i5-8365UE wins every benchmark in the data, so its advantages are clear. It takes the lead in all Cinebench R15, R20, and R23 tests, both single-core and multi-core. The 8-thread configuration gives it a major edge in multi-threaded rendering tasks like Cinebench. Its 4.10 GHz boost clock also makes it better for single-threaded applications that rely on high clock speeds. The 15 W TDP makes it ideal for fanless or ultra-portable designs where heat and power draw are constrained. If you need maximum performance in a mobile form factor, this is the chip.

The i5-7400T has no benchmark wins, but it wins in platform flexibility. It is a desktop part on Socket 1151, which means you can pair it with a wide range of motherboards, upgrade the CPU later, and use standard desktop cooling. Its 35 W TDP is still low enough for compact desktop builds, but it does not require the specialized thermal solutions of a 15 W mobile part. For a budget desktop build where upgradeability matters more than raw performance, the i5-7400T is the practical choice. The data shows it is slower, but the desktop platform it enables is a significant advantage in real-world use.

Specification Differences

The two processors differ in nearly every key specification except for cache and memory support. The i5-8365UE has 4 cores and 8 threads, while the i5-7400T has 4 cores and 4 threads. The i5-8365UE has a base clock of 1600 MHz and a boost clock of 4.10 GHz; the i5-7400T has a base clock of 2400 MHz and a boost clock of 3.00 GHz. TDP is 15 W for the i5-8365UE and 35 W for the i5-7400T. The sockets are incompatible: BGA 1528 vs Socket 1151.

Architecture differs: Whiskey Lake vs Kaby Lake. The i5-8365UE uses UHD Graphics 620, while the i5-7400T uses HD 630. The i5-8365UE was released on 2019-04-15, while the i5-7400T was released on 2017-01-02. The i5-8365UE has a launch MSRP of $297; the i5-7400T has no launch MSRP listed. The i5-8365UE's part number is SRFDU, and the i5-7400T's is SR332. Both are 14 nm, have 64 KB L1 and 256 KB L2 per core, 6 MB shared L3, DDR4 dual-channel memory with 38.4 GB/s bandwidth, no ECC, and PCIe Gen 3 with 16 lanes. Neither is multiplier-unlocked. The i5-8365UE targets the mobile market segment, while the i5-7400T targets the desktop segment. Both are marked as active in production status.