Intel Core i5-8365UE vs Intel Xeon W-2104 Comparison

The Intel Core i5-8365UE and the Intel Xeon W-2104 are both 14 nm Intel parts with four physical cores, yet they are engineered for entirely different worlds: one is a low-power mobile chip designed for thin laptops, the other a high-TDP workstation processor for socketed servers. The benchmark data shows a decisive, albeit narrow, sweep for the i5-8365UE, which wins all six head-to-head Cinebench comparisons. However, the Xeon W-2104 counters with platform-level advantages in memory bandwidth, PCIe lanes, and ECC support, making the choice dependent on whether raw compute or system expandability matters more.

Where Each One Wins

The Intel Core i5-8365UE wins every single performance contest recorded in the data. In Cinebench R15 multicore, it scores 474 against the Xeon W-2104’s 470, a 0.9% lead. The single-core R15 test is a dead heat at 66 points each, but the i5-8365UE edges ahead in R20 single-core (279 vs 276, a 1.1% delta) and maintains a consistent 0.9% advantage in R23 multicore (4710 vs 4669). This pattern is clear: the i5-8365UE’s 8 threads versus the Xeon’s 4 threads, combined with its 4.10 GHz boost clock, deliver a small but repeatable edge in threaded and lightly-threaded workloads alike.

The Intel Xeon W-2104 wins where benchmarks do not measure: platform capability. It supports quad-channel DDR4 memory with 85.3 GB/s of bandwidth, more than double the i5-8365UE’s 38.4 GB/s dual-channel figure. It also offers 48 PCIe Gen 3 lanes (CPU only) versus the i5-8365UE’s 16, and it supports ECC memory, which the i5-8365UE lacks. For workloads that saturate memory bandwidth or require many expansion cards, the Xeon W-2104 is the clear choice, even though its Cinebench scores are slightly lower.

Architecture Differences

The two CPUs are built on the same 14 nm process node and use Intel’s own foundry, but their architectures diverge sharply. The i5-8365UE is a Whiskey Lake-U mobile part, codenamed Whiskey Lake-U, with a 15 W TDP and sockets into Intel BGA 1528. It has 4 cores and 8 threads, a 1600 MHz base clock, and a 4.10 GHz boost clock. Its cache layout is 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3. It integrates UHD Graphics 620, making it a complete system-on-chip for laptops.

The Xeon W-2104 is a Skylake-W server/workstation chip with a 120 W TDP, socketed for Intel Socket 2066. It runs 4 cores and 4 threads at a fixed 3.20 GHz base clock with no boost clock listed. Its cache is larger per core: 1 MB L2 per core and 8.25 MB shared L3. It has no integrated graphics, a 484 mm² die size, and supports ECC memory. The Xeon’s production status is end-of-life, while the i5-8365UE remains active. The Xeon was released in 2017, the i5-8365UE in 2019, and both are multiplier-unlocked false, meaning no overclocking.

FAQ

Q: Which CPU has more threads, and does it matter for performance?

A: The Intel Core i5-8365UE has 8 threads, while the Intel Xeon W-2104 has 4. This explains the i5-8365UE’s consistent 0.9% lead in Cinebench R15, R20, and R23 multicore tests, despite the Xeon’s higher 3.20 GHz base clock.

Q: Can the Xeon W-2104 use ECC memory, and can the i5-8365UE?

A: The Xeon W-2104 supports ECC memory, while the i5-8365UE does not. This makes the Xeon suitable for error-correcting workloads, but it does not translate into a Cinebench performance advantage.

Q: What is the TDP difference between the two chips?

A: The i5-8365UE has a 15 W TDP, while the Xeon W-2104 has a 120 W TDP. The Xeon consumes eight times the power budget, yet still loses every benchmark comparison.

Q: Which CPU has more PCIe lanes for expansion?

A: The Xeon W-2104 provides 48 PCIe Gen 3 lanes (CPU only), versus 16 lanes on the i5-8365UE. This is a major platform advantage for the Xeon in systems requiring multiple GPUs or NVMe drives.

Q: Do both CPUs have integrated graphics?

A: No. The i5-8365UE includes UHD Graphics 620, while the Xeon W-2104 has no integrated graphics. The i5-8365UE can drive a display without a discrete GPU, whereas the Xeon requires one.

Q: Which chip has a higher boost clock?

A: The i5-8365UE boosts to 4.10 GHz, while the Xeon W-2104 has no boost clock listed, operating at a fixed 3.20 GHz. The i5-8365UE’s boost capability is a key factor in its single-core wins.

Specification Differences

| Specification | Intel Core i5-8365UE | Intel Xeon W-2104 |

|---|---|---|

| Threads | 8 | 4 |

| Base Clock | 1600 MHz | 3200 MHz |

| Boost Clock | 4100 MHz | None |

| TDP | 15 W | 120 W |

| Socket | Intel BGA 1528 | Intel Socket 2066 |

| Architecture | Whiskey Lake | Skylake |

| Codename | Whiskey Lake-U | Skylake-W |

| Die Size | Not listed | 484 mm² |

| L2 Cache | 256 KB (per core) | 1 MB (per core) |

| L3 Cache | 6 MB (shared) | 8.25 MB (shared) |

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 38.4 GB/s | 85.3 GB/s |

| ECC Memory | No | Yes |

| PCIe Lanes | 16 (Gen 3, CPU only) | 48 (Gen 3, CPU only) |

| Integrated Graphics | UHD Graphics 620 | None |

| Market Segment | Mobile | Server/Workstation |

| Production Status | Active | End-of-life |

| Release Date | 2019-04-15 | 2017-08-28 |

| Launch MSRP | $297 | $255 |

| Part Number | SRFDU | SR3LH |

Head-to-Head Benchmarks

The most striking result is the uniformity of the i5-8365UE’s victory. In Cinebench R15 multicore, it scores 474 against 470, a 0.9% margin. The R15 single-core test is perfectly tied at 66 points, showing that per-core IPC is effectively identical. But the i5-8365UE pulls ahead in R20 single-core with 279 points versus 276, a 1.1% delta — its highest winning margin across all tests. This suggests the i5-8365UE’s 4.10 GHz boost clock gives it a slight edge in lightly-threaded workloads, even against a chip with a higher 3.20 GHz base clock.

In multicore tests, the i5-8365UE’s thread advantage becomes apparent. R20 multicore shows 1978 vs 1960 (0.9% delta), and R23 multicore shows 4710 vs 4669 (0.9% delta). The consistency of the 0.9% delta across all three multicore tests indicates a stable performance gap driven by the extra threads, not by clock speed variations. The Xeon W-2104’s larger L3 cache (8.25 MB vs 6 MB) and larger per-core L2 (1 MB vs 256 KB) do not compensate for the missing hyper-threading.

Looking at the broader context, the i5-8365UE’s avgBenchmarkScore is 1362, while the Xeon W-2104’s is 1350. Both sit at the 36th percentile of all CPUs, meaning they are directly comparable in overall performance tier. The i5-8365UE’s nearest rival is the Intel Core i5-6500T at 0% delta, while the Xeon W-2104’s nearest rival is the Intel Core i5-7400T at 0.1% delta. This confirms that the two chips occupy the same performance class, with the i5-8365UE holding a marginal but real lead.

The Verdict

The data is unambiguous: the Intel Core i5-8365UE is the faster processor in every benchmark recorded. It wins all six head-to-head comparisons, albeit by narrow margins (0% to 1.1%), and its 8 threads give it a structural advantage that the Xeon W-2104’s higher base clock and larger cache cannot overcome. For anyone choosing purely on Cinebench scores, the i5-8365UE is the pick.

However, the Xeon W-2104 is not without purpose. Its quad-channel memory bus delivers 85.3 GB/s of bandwidth, more than double the i5-8365UE’s 38.4 GB/s. It supports ECC memory, offers 48 PCIe Gen 3 lanes versus 16, and targets the server/workstation segment. The i5-8365UE is mobile-only with integrated graphics and a 15 W TDP, while the Xeon is a 120 W socketed part with no graphics and a 484 mm² die. The Xeon’s launch MSRP was $255, and the i5-8365UE’s was $297.

The verdict depends on the system. If the goal is a compact, power-efficient laptop with integrated graphics and slightly better compute performance, the i5-8365UE wins outright. If the goal is a workstation requiring ECC memory, massive memory bandwidth, and extensive PCIe expansion — and the 0.9% compute deficit is acceptable — the Xeon W-2104 is the justified choice. The benchmark data says the i5-8365UE is faster; the platform data says the Xeon W-2104 is more capable. Choose accordingly.