Intel Core i5-9600 vs Intel Xeon D-1557 Comparison

Where Each One Wins

The benchmark data paints a remarkably one-sided picture at first glance. Across all six recorded Cinebench tests, the Intel Core i5-9600 takes the win every time. The Xeon D-1557, despite carrying double the core count and four times the thread count, never manages to top a single test. That said, a closer look at the numbers reveals that the margins are consistently narrow, never exceeding 3.2 percent in any workload. This is not a case of one processor dominating another; it is a case of a desktop part edging out a server part across the board, but by margins that could easily be lost in run-to-run variance.

Where the i5-9600 wins most clearly is in single-threaded performance. The gap in Cinebench R15 single-core is 2.7 percent (115 versus 112), and in R20 single-core it is 3.2 percent (482 versus 467). The R23 single-core test shows a 3.1 percent advantage (1149 versus 1114). These are modest but consistent gains, reflecting the i5's higher clock ceiling of 4.50 GHz against the Xeon's 2.10 GHz boost. For workloads that rely on one or two threads, such as legacy applications, lightly threaded games, or scripting tasks, the i5-9600 is the safer choice.

Multi-core results tell a similar story, though the reasoning is different. The i5 wins Cinebench R15 multi-core by 3.1 percent (820 versus 795), R20 multi-core by 3.2 percent (3419 versus 3314), and R23 multi-core by 3.2 percent (8141 versus 7892). The Xeon D-1557 has 12 cores and 24 threads, exactly double the i5's 6 cores and 6 threads, yet it still trails. This suggests that the Xeon's very low base clock of 1.50 GHz is a severe handicap in bursty, short-duration render workloads. The i5's 3.10 GHz base clock, combined with its ability to boost to 4.50 GHz, allows it to complete these tasks faster even with fewer physical resources.

The Xeon D-1557 does have one clear arena where it should logically win, even if the provided benchmarks do not capture it: sustained throughput under heavy parallel load with power constraints. Its 45 W TDP is substantially lower than the i5's 65 W, and it supports ECC memory. The database does not include a test that runs for hours, so the recorded Cinebench scores likely favor the burst-oriented i5. For a server chassis running many concurrent virtual machines or containerized workloads, the Xeon's thread count and memory integrity features could matter more than the 3 percent deficit seen here.

In terms of broader positioning, the i5-9600 sits at the 48th percentile of all CPUs in the database, while the Xeon D-1557 sits at the 47th. Their average benchmark scores are 2354 and 2282, respectively. The i5's nearest rivals include the Intel Xeon E3-1285 v6 (within 0.3 percent) and the AMD Ryzen 5 2500X (within 0.3 percent). The Xeon D-1557's nearest rivals include the Intel Xeon E5-2629 v3 (exact tie at 0.0 percent delta) and the Intel Core i3-10305 (0.8 percent behind). These percentile and rival data confirm that both chips occupy the same general performance tier, despite their very different designs.

Architecture Differences

The two processors come from different architectural lineages and target different market segments. The Intel Core i5-9600 is a desktop part built on Coffee Lake, the 14 nm process generation that Intel used across its 8th and 9th generation Core families. It features 6 cores and 6 threads, with no hyper-threading enabled. Its base clock is 3.10 GHz and its boost clock reaches 4.50 GHz. The chip is locked, meaning the multiplier is not unlocked for overclocking. It uses the Intel Socket 1151 platform and has a 65 W TDP.

The Intel Xeon D-1557, by contrast, is a server and workstation processor built on Broadwell, specifically the Broadwell-DE derivative. It uses the same 14 nm process node and is also manufactured by Intel, but the design philosophy is entirely different. The Xeon packs 12 cores and 24 threads, enabling simultaneous multithreading on every core. Its base clock is just 1.50 GHz, and its boost clock is 2.10 GHz. The TDP is 45 W, which is lower than the i5 despite double the core count. This is achieved through aggressive clock throttling and a power-optimized design intended for dense, always-on server environments.

The cache hierarchies diverge as well. Both chips feature 64 KB of L1 cache per core and 256 KB of L2 cache per core, so those numbers are identical. The L3 cache, however, is organized differently. The i5-9600 has 9 MB of shared L3 cache across all six cores. The Xeon D-1557 has 1.5 MB of L3 cache per core, which totals 18 MB across all 12 cores. That is double the total L3 capacity, though it is distributed per-core rather than pooled. For workloads that benefit from a large shared cache, the i5's design may be more efficient; for workloads with strong per-core locality, the Xeon's per-core allocation could be advantageous.

Memory support is another major split. The i5-9600 supports DDR4 memory only, over a dual-channel bus, with a memory bandwidth of 42.7 GB/s. It does not support ECC memory. The Xeon D-1557 supports both DDR3 and DDR4, also over a dual-channel bus, and it does support ECC memory. The database does not list a memory bandwidth figure for the Xeon, but the inclusion of ECC is a significant feature for server deployments where data integrity is critical. The i5's integrated UHD 630 graphics controller is present, while the Xeon D-1557 has no integrated graphics at all. This means the i5 can drive a display without a discrete GPU, while the Xeon requires a separate graphics adapter.

PCIe lane counts also differ. The i5-9600 provides 16 PCIe Gen 3 lanes from the CPU, while the Xeon D-1557 provides 24 PCIe Gen 3 lanes. The extra lanes on the Xeon support more expansion cards, NVMe drives, or network interfaces, which is expected for a server platform. The socket types are incompatible: the i5 uses Intel Socket 1151, while the Xeon uses Intel BGA 1667, a ball-grid-array package that is soldered to the motherboard. The Xeon's production status is listed as Active, while the i5 is End-of-life. The Xeon also has a recorded die size of 246 mm² and a transistor count of 3,200 million; no die size or transistor count is recorded for the i5.

Head-to-Head Benchmarks

The head-to-head results are uniform in direction but variable in magnitude. Starting with Cinebench R15 multi-core, the i5-9600 scores 820 against the Xeon's 795, a 3.1 percent advantage. The R15 single-core test shows 115 versus 112, a 2.7 percent edge. Moving to R20, the i5 wins multi-core 3419 to 3314, a 3.2 percent gap, and single-core 482 to 467, also 3.2 percent. In R23, the i5 takes multi-core 8141 to 7892, again 3.2 percent, and single-core 1149 to 1114, a 3.1 percent lead.

The largest single margin is 3.2 percent, appearing in four of the six tests. The smallest margin is 2.7 percent in R15 single-core. These are tight margins, and they suggest that the i5's clock speed advantage is nearly offset by the Xeon's core and thread advantage in multi-threaded tests. If the Xeon's clocks were even slightly higher, or if the i5 did not boost so aggressively, the results could flip.

Interesting pattern: the single-core margins are not consistently larger than the multi-core margins. In R15, single-core is 2.7 percent while multi-core is 3.1 percent. In R20, both are 3.2 percent. In R23, single-core is 3.1 percent and multi-core is 3.2 percent. This consistency suggests that the i5's advantage comes from a combination of higher clock speeds and possibly more efficient instruction handling per clock, rather than from any single architectural feature. The Xeon's 12 cores cannot overcome the clock deficit in these short render tests.

The percentile data reinforces the closeness. The i5-9600 has an average benchmark score of 2354 and sits at the 48th percentile. The Xeon D-1557 has an average score of 2282 and sits at the 47th percentile. The difference in average score is 72 points, about 3.1 percent, which matches the head-to-head deltas. Notably, the Xeon's nearest rival is the Intel Xeon E5-2629 v3 with an exact 0.0 percent delta, meaning the database considers them statistically equivalent. The i5's nearest rival, the Intel Xeon E3-1285 v6, is just 0.3 percent behind.

The Verdict

The data supports a clear if narrow verdict. For desktop use, especially tasks that benefit from high single-threaded performance and bursty multi-core renders, the Intel Core i5-9600 is the better choice. It wins all six recorded benchmarks, has a higher boost clock, includes integrated graphics, and supports DDR4 memory with a defined bandwidth of 42.7 GB/s. Its 65 W TDP is higher than the Xeon's 45 W, but for a desktop system with adequate cooling, that is not a limiting factor. The i5 is end-of-life, but it remains competitive in the mid-range desktop tier as shown by its 48th percentile ranking.

For server or workstation deployments where ECC memory is required, the Intel Xeon D-1557 is the only option of the two. It supports ECC, has double the cores and four times the threads, and offers 24 PCIe Gen 3 lanes. Its 45 W TDP and active production status make it attractive for embedded or always-on systems. The performance deficit in Cinebench is real but small, and it may be offset by the Xeon's superior thread count in workloads that scale beyond six threads and run for extended periods. The lack of integrated graphics means a discrete GPU is mandatory, but that is standard for server platforms.

The launch MSRP of the Xeon D-1557 is $694. No launch MSRP is recorded for the i5-9600.

Buyers should choose based on platform needs, not raw benchmark scores. If the socket is Socket 1151 and the workload is single-socket desktop, the i5 wins. If the platform is BGA 1667 and the workload demands ECC, many PCIe lanes, or 24 threads, the Xeon is the appropriate part despite its benchmark losses.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon D-1557 has 12 cores and 24 threads. The Intel Core i5-9600 has 6 cores and 6 threads.

Q: Does the Intel Core i5-9600 support ECC memory?

A: No, the i5-9600 does not support ECC memory. The Xeon D-1557 does support ECC memory.

Q: What is the largest benchmark margin between the two?

A: The largest margin is 3.2 percent, recorded in Cinebench R20 multi-core, R20 single-core, and R23 multi-core, all in favor of the i5-9600.

Q: Which processor has integrated graphics?

A: The Intel Core i5-9600 has integrated UHD 630 graphics. The Intel Xeon D-1557 has no integrated graphics.

Q: What is the TDP of each processor?

A: The i5-9600 has a 65 W TDP. The Xeon D-1557 has a 45 W TDP.

Q: Are the sockets the same?

A: No. The i5-9600 uses Intel Socket 1151, while the Xeon D-1557 uses Intel BGA 1667.

Specification Differences

| Specification | Intel Core i5-9600 | Intel Xeon D-1557 |

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

| Cores | 6 | 12 |

| Threads | 6 | 24 |

| Base clock | 3.10 GHz | 1.50 GHz |

| Boost clock | 4.50 GHz | 2.10 GHz |

| TDP | 65 W | 45 W |

| Socket | Intel Socket 1151 | Intel BGA 1667 |

| Architecture | Coffee Lake | Broadwell |

| Codename | Coffee Lake | Broadwell |

| Generation | Core i5 (Coffee Lake Refresh) | Xeon D (Broadwell-DE) |

| Transistors | Not recorded | 3,200 million |

| Die size | Not recorded | 246 mm² |

| L3 cache | 9 MB shared | 1.5 MB per core |

| Memory support | DDR4 | DDR3, DDR4 |

| Memory bandwidth | 42.7 GB/s | Not recorded |

| ECC memory | No | Yes |

| PCIe lanes | 16 (Gen 3) | 24 (Gen 3) |

| Integrated graphics | UHD 630 | None |

| Market segment | Desktop | Server/Workstation |

| Production status | End-of-life | Active |

| Release date | 2018-10-18 | 2016-02-23 |

| Launch MSRP | Not recorded | $694 |

| Part number | SR3X2 | SR2M4 |

| Percentile | 48th | 47th |

| Average benchmark score | 2354 | 2282 |