Intel Core i5-4590T vs Intel Core i5-8365UE Comparison

The Intel Core i5-8365UE and the Intel Core i5-4590T are two very different processors from different eras, despite sharing the same core count and brand name. The 8365UE is a low-power mobile part built on a modern process, while the 4590T is a desktop chip from an older generation. Benchmark data from the database shows a clear performance hierarchy, with the newer mobile chip holding a substantial lead across every recorded workload.

Head-to-Head Benchmarks

The database records five direct comparisons between these two processors, and the Intel Core i5-8365UE wins all five. The margins are strikingly consistent, hovering around 37% in each test. In the Cinebench R15 multi-core test, the 8365UE scores 474 against the 4590T’s 347, a delta of 36.6%. The same pattern appears in Cinebench R20 multi-core, where the 8365UE records 1978 points versus 1446 for the 4590T, a 36.8% advantage.

Single-threaded performance tells the same story. In Cinebench R20 single-core, the 8365UE scores 279 while the 4590T manages 204, again a 36.8% delta. The Cinebench R23 results reinforce this: multi-core shows 4710 for the 8365UE and 3445 for the 4590T, a 36.7% lead, while single-core shows 665 versus 486, which is a 36.8% gap. The consistency of these deltas across different rendering workloads suggests a fundamental architectural advantage rather than a test-specific quirk.

The average benchmark score in the database also favors the 8365UE. The newer chip posts an average score of 1362, while the 4590T sits at 1340. That is only a 1.6% difference in aggregate, but it includes a Geekbench result for the 4590T that has no corresponding entry for the 8365UE. The 4590T’s Geekbench multi-core score is 2540 and single-core is 911, but without a matching 8365UE result, the head-to-head comparison relies on the Cinebench suite, where the 8365UE’s advantage is decisive.

Looking at percentile placement, both CPUs land at the 36th percentile among all processors in the database. That equal standing is somewhat misleading given the direct benchmark deltas, but it reflects that the 4590T is measured against a broader field of older parts while the 8365UE competes among more recent mobile chips. The nearest rivals for the 8365UE include the Intel Core i5-6500T with an identical average score of 1362 and a 0% delta, as well as the Intel Core i7-3820QM at 1366 (delta -0.3%) and the Intel Xeon D-1521 at 1367 (delta -0.4%). On the other side, the 4590T’s nearest rival is the Intel Core i5-760 at 1337 (delta 0.2%), with the Core i5-4670 at 1347 (delta -0.5%), the Core i5-7400T at 1348 (delta -0.6%), and the Xeon W-2104 at 1350 (delta -0.7%). The 8365UE’s rivals are all newer or higher-tier parts, while the 4590T sits alongside older desktop chips, which explains the similar percentile despite the large head-to-head gap.

The Verdict

The data points to a single conclusion: the Intel Core i5-8365UE is the faster processor in every measured scenario. It wins all five head-to-head benchmarks with deltas between 36.6% and 36.8%. Anyone choosing between these two strictly on performance should select the 8365UE, regardless of whether the workload is single-threaded or multi-threaded.

That said, the two chips serve different markets. The 8365UE is a mobile processor with a 15 W TDP, while the 4590T is a desktop part with a 35 W TDP. The 8365UE achieves its higher scores while using less than half the power budget, which is a remarkable efficiency gain. The 4590T, being end-of-life, offers no production advantage. The 8365UE is listed as active production, so it remains available for new designs.

For a user with an existing Socket 1150 motherboard, the 4590T could be a drop-in upgrade, but the database does not provide any platform-compatibility metrics. On raw numbers, the 8365UE is the clear winner. The 4590T’s only edge is its lower launch MSRP of $192 compared to the 8365UE’s $297, but that price difference does not offset the 37% performance deficit in these workloads.

Architecture Differences

The two processors come from different architectural generations and manufacturing processes. The Intel Core i5-8365UE uses the Whiskey Lake architecture, specifically Whiskey Lake-U, built on a 14 nm process node. The Intel Core i5-4590T uses the Haswell architecture on a 22 nm process. The newer 14 nm node allows for higher clock speeds and better power efficiency, which is evident in the performance-per-watt ratio.

The 8365UE has 4 cores and 8 threads, while the 4590T has 4 cores and 4 threads. The extra threads from Hyper-Threading on the 8365UE contribute to its multi-core advantage, though the single-core lead shows that clock speed and IPC improvements also matter. The 8365UE has a base clock of 1600 MHz and a boost clock of 4.10 GHz, while the 4590T has a base clock of 2000 MHz and a boost of 3.00 GHz. Despite the lower base clock, the 8365UE’s higher boost clock and newer architecture push it ahead.

Cache layouts are identical in per-core terms: both have 64 KB of L1 per core and 256 KB of L2 per core, with 6 MB of shared L3. The memory support differs significantly. The 8365UE supports DDR4 memory with a dual-channel bus and a memory bandwidth of 38.4 GB/s. The 4590T supports DDR3 with a dual-channel bus and a memory bandwidth of 25.6 GB/s. That 50% improvement in theoretical memory bandwidth for the 8365UE helps in memory-intensive workloads.

The integrated graphics also differ. The 8365UE includes UHD Graphics 620, while the 4590T has Intel HD 4600. The database does not include graphics benchmarks, so a direct comparison is not possible, but the newer GPU generation in the 8365UE is a notable architectural difference. The 4590T’s transistor count is listed as 1,400 million with a die size of 177 mm², while the 8365UE’s transistor count and die size are not recorded in the database.

The socket types are incompatible, which is expected given the generational gap. The 8365UE uses Intel BGA 1528, a soldered mobile socket, while the 4590T uses Intel Socket 1150 for desktop motherboards. Both support PCIe Gen 3 with 16 lanes from the CPU, so expansion capability is similar in that regard. Neither chip supports ECC memory, and neither has an unlocked multiplier.

FAQ

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

A: The Intel Core i5-8365UE is faster in every recorded multi-core test. It scores 474 versus 347 in Cinebench R15 multi-core, 1978 versus 1446 in R20 multi-core, and 4710 versus 3445 in R23 multi-core, with deltas around 36.7%.

Q: Does the Intel Core i5-4590T win any benchmark?

A: No. In the database’s head-to-head results, the 4590T wins 0 of 5 tests. The 8365UE wins all five.

Q: How do their single-core scores compare?

A: The 8365UE leads by 36.8% in both Cinebench R20 and R23 single-core tests. It scores 279 versus 204 in R20 and 665 versus 486 in R23.

Q: What are the power consumption differences?

A: The 8365UE has a TDP of 15 W, while the 4590T has a TDP of 35 W. The 8365UE delivers higher performance while consuming less than half the power budget.

Q: Can they use the same memory?

A: No. The 8365UE supports DDR4 with a dual-channel bus and 38.4 GB/s bandwidth. The 4590T supports DDR3 with a dual-channel bus and 25.6 GB/s bandwidth.

Q: Are both processors still in production?

A: No. The 8365UE is listed as active production, while the 4590T is end-of-life.

Where Each One Wins

The Intel Core i5-8365UE wins in all measured categories. For rendering workloads, which the Cinebench suite represents, the 8365UE is consistently 36.6% to 36.8% ahead. This applies equally to multi-threaded rendering, where its 8 threads help, and to single-threaded tasks, where its higher boost clock of 4.10 GHz and newer architecture dominate the 4590T’s 3.00 GHz boost.

The 8365UE is also the better choice for power-constrained environments. Its 15 W TDP makes it suitable for thin-and-light laptops or fanless designs, while the 4590T’s 35 W TDP requires more substantial cooling. The database shows no scenario where the 4590T outperforms the 8365UE, so on benchmark evidence alone, the 4590T has no winning use case.

The 4590T might still appeal to someone with a legacy Socket 1150 motherboard who cannot upgrade the platform, but that is a hardware compatibility consideration, not a performance one. The 4590T’s 4 threads limit its multi-threaded ceiling, and its older Haswell architecture trails in every recorded score. For new builds or upgrades where the socket is not a constraint, the 8365UE is the only rational choice based on this data.

Specification Differences

The two processors differ in nearly every major specification. The 8365UE uses the Whiskey Lake architecture on a 14 nm process, while the 4590T uses Haswell on a 22 nm process. Core counts are the same at 4, but the 8365UE has 8 threads versus 4 threads for the 4590T. The 8365UE has a base clock of 1600 MHz and a boost clock of 4.10 GHz; the 4590T has a base clock of 2000 MHz and a boost clock of 3.00 GHz.

The TDP difference is substantial: 15 W for the 8365UE versus 35 W for the 4590T. The sockets are incompatible, with the 8365UE using Intel BGA 1528 and the 4590T using Intel Socket 1150. Memory support differs, with the 8365UE using DDR4 and the 4590T using DDR3, though both use dual-channel buses. Memory bandwidth is 38.4 GB/s for the 8365UE and 25.6 GB/s for the 4590T.

Integrated graphics differ, with the 8365UE featuring UHD Graphics 620 and the 4590T featuring Intel HD 4600. The 8365UE is a mobile part and is still in active production, while the 4590T is a desktop part that is end-of-life. The 8365UE has a launch MSRP of $297, and the 4590T has a launch MSRP of $192. The 4590T’s transistor count is 1,400 million with a die size of 177 mm², while those figures are not recorded for the 8365UE. Both processors have 64 KB L1 and 256 KB L2 per core, and 6 MB shared L3. Both support PCIe Gen 3 with 16 lanes, neither supports ECC memory, and neither has an unlocked multiplier.