Intel Core i5-8300H vs Intel Xeon E3-1585L v5 Comparison

The Intel Core i5-8300H and Intel Xeon E3-1585L v5 are both 45W, four-core, eight-thread processors, but they target different segments: mobile consumer laptops versus server/workstation platforms. The benchmark data shows a consistent, though narrow, performance advantage for the Xeon part across every tested workload. The Xeon E3-1585L v5 wins all six head-to-head benchmark comparisons, with the Core i5-8300H trailing by roughly 9% in each test. This makes the Xeon the faster chip in absolute terms, but the margin is small enough that the i5-8300H remains competitive in its intended mobile market.

Head-to-Head Benchmarks

The most striking pattern in the data is the uniformity of the Xeon’s victory. In Cinebench R15 multi-core, the Xeon E3-1585L v5 scores 693 against the i5-8300H’s 629, a delta of -9.2% for the i5. The single-core R15 test shows a similar gap: 97 versus 88, a -9.3% difference. This consistency suggests a fundamental clock-speed or architectural advantage rather than a workload-specific quirk.

Moving to newer Cinebench versions, the trend holds. In Cinebench R20 multi-core, the Xeon scores 2888 while the i5-8300H manages 2622, again a -9.2% delta. The single-core R20 result is 407 versus 370, a -9.1% difference. The gap narrows slightly in the newest R23 test, with the Xeon at 6878 and the i5 at 6245 in multi-core (-9.2%), and 971 versus 881 in single-core (-9.3%). Across all six tests, the Xeon’s lead fluctuates only between -9.1% and -9.3%, indicating a stable performance edge.

Notably, the i5-8300H has additional Geekbench results not available for the Xeon: 3920 multi-core and 1286 single-core. These scores are not directly comparable to the Xeon, but they place the i5 in context. The i5-8300H’s average benchmark score is 2005, while the Xeon’s is 1989. Despite losing every head-to-head Cinebench test, the i5 has a slightly higher average score overall, likely due to the inclusion of its Geekbench numbers in that aggregate. This discrepancy highlights the importance of looking at specific tests rather than composite averages.

The Xeon’s wins are consistent but not overwhelming. A 9% lead in multi-core rendering is meaningful for professional workloads, but it does not represent a generational leap. The i5-8300H, with its higher boost clock of 3.90 GHz versus the Xeon’s 3.70 GHz, manages to stay within striking distance despite the Xeon’s higher base clock of 3.00 GHz versus 2.30 GHz. The data suggests that the Xeon’s architectural maturity in Skylake, combined with its higher base frequency, delivers a small but reliable advantage.

Where Each One Wins

From the benchmark data, the Xeon E3-1585L v5 wins every single test category. This includes both multi-threaded workloads like Cinebench R15, R20, and R23 multi-core, and single-threaded workloads like the corresponding single-core tests. For users prioritizing raw rendering performance in applications like Cinebench, the Xeon is the clear choice. Its 693 R15 multi-core score and 6878 R23 multi-core score represent the higher throughput available in this comparison.

The i5-8300H, while losing all head-to-head tests, still has a role. Its Geekbench scores of 3920 multi-core and 1286 single-core are respectable for a mobile chip. The i5 also has a higher boost clock (3.90 GHz) than the Xeon (3.70 GHz), which could translate to better short-burst performance in lightly threaded tasks, even if the Cinebench single-core tests show the Xeon ahead. The i5’s market segment is Mobile, indicating it is designed for laptops where power efficiency and thermal management are critical, though both chips share a 45W TDP.

The Xeon’s market segment is Server/Workstation, and its feature set reflects that. It supports ECC memory, which the i5 does not, making it suitable for error-sensitive computing environments. The Xeon also has a higher memory bandwidth specification at 34.1 GB/s with dual-channel support, though the i5’s memory bandwidth is not listed. For users needing ECC or maximum memory throughput, the Xeon is the only option between the two.

In practical terms, the Xeon wins on pure compute performance across all tested benchmarks. The i5-8300H’s advantages are more qualitative: it is a mobile part with a newer Coffee Lake architecture and a higher boost clock, but the data does not show these translating into wins in Cinebench. The i5’s only unique benchmark scores are in Geekbench, where it posts numbers that are not directly comparable to the Xeon.

Architecture Differences

The two processors come from different architectural generations. The i5-8300H uses Coffee Lake-H, built on a 14 nm process, with a die size of 126 mm². The Xeon E3-1585L v5 uses Skylake-H, also on 14 nm, but with a larger die size of 171 mm² and a transistor count of 2,300 million. The larger die and higher transistor count for the Xeon suggest a more complex design, likely due to its integrated graphics and server features.

Both chips have 4 cores and 8 threads, with identical L1 cache (64 KB per core) and L2 cache (256 KB per core). The key cache difference is in L3: the i5-8300H has 12 MB shared, while the Xeon has only 8 MB shared. This gives the i5 a 50% larger L3 cache, which could improve performance in workloads with large working sets, though the benchmark data does not reflect this advantage.

The i5-8300H supports only DDR4 memory, while the Xeon supports both DDR3 and DDR4. The Xeon specifies a dual-channel memory bus with 34.1 GB/s bandwidth, a figure not provided for the i5. The Xeon also features ECC memory support, a critical feature for server workloads, which the i5 lacks. The Xeon’s PCIe configuration is listed as Gen 3 with 16 lanes (CPU only), while the i5’s PCIe details are not provided.

Integrated graphics differ significantly. The i5-8300H includes UHD 630, a mainstream integrated GPU. The Xeon E3-1585L v5 includes Iris Pro Graphics P580, a higher-end integrated GPU with more execution units. This makes the Xeon more capable for graphics tasks without a discrete GPU, though the i5’s UHD 630 is still adequate for basic display output.

The Xeon was released earlier, on 2016-05-30, while the i5-8300H came later on 2018-04-01. Both are end-of-life products. The Xeon has a launch MSRP of $445, which can be stated once. The i5’s launch MSRP is not listed. The Xeon’s socket is Intel BGA 1440, matching the i5’s socket, suggesting they could physically fit the same boards, though their market segments imply different platform requirements.

The Verdict

The data is unambiguous: the Intel Xeon E3-1585L v5 outperforms the Intel Core i5-8300H in every head-to-head benchmark. It wins all six Cinebench tests with a consistent margin of approximately 9%. For users whose primary concern is raw compute performance in rendering or similar multi-threaded workloads, the Xeon is the stronger choice. Its higher base clock of 3.00 GHz and Skylake architecture deliver a reliable edge over the i5’s 2.30 GHz base clock, despite the i5’s higher boost clock.

However, the i5-8300H is not without merit. Its larger 12 MB L3 cache, newer Coffee Lake architecture, and higher boost clock of 3.90 GHz make it a capable mobile processor. The i5’s Geekbench scores of 3920 multi-core and 1286 single-core, while not directly comparable to the Xeon, indicate solid performance. For laptop users who need a balanced processor for general productivity and light content creation, the i5-8300H is a viable option, especially given its mobile design.

The Xeon’s server features tilt the decision further in its favor for professional use. ECC memory support, dual-channel DDR3/DDR4 memory, and a 34.1 GB/s memory bandwidth make it suitable for workstations where data integrity is paramount. The Xeon’s Iris Pro Graphics P580 also offers superior integrated graphics performance compared to the i5’s UHD 630. The Xeon’s $445 launch MSRP reflects its higher-end positioning, though no price comparison is permitted here.

Ultimately, the choice depends on the platform and workload. If you are building or buying a laptop, the i5-8300H is the only mobile option. If you are assembling a server or workstation, the Xeon E3-1585L v5 offers better performance and ECC support. The benchmark data shows the Xeon ahead in every test, making it the performance winner, while the i5-8300H remains a strong mobile alternative with a larger cache and newer architecture.

FAQ

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

A: The Intel Xeon E3-1585L v5 scores 6878 in Cinebench R23 multi-core, while the Intel Core i5-8300H scores 6245, giving the Xeon a 9.2% lead.

Q: Do both processors have the same number of cores and threads?

A: Yes, both the Intel Core i5-8300H and the Intel Xeon E3-1585L v5 have 4 cores and 8 threads.

Q: Does the Intel Core i5-8300H support ECC memory?

A: No, the i5-8300H does not support ECC memory. The Xeon E3-1585L v5 does support ECC memory.

Q: What is the L3 cache size difference?

A: The Intel Core i5-8300H has 12 MB of shared L3 cache, while the Intel Xeon E3-1585L v5 has 8 MB of shared L3 cache. The i5 has 4 MB more.

Q: Which processor has a higher boost clock?

A: The Intel Core i5-8300H has a boost clock of 3.90 GHz, which is higher than the Xeon E3-1585L v5’s boost clock of 3.70 GHz.

Q: What are the integrated graphics on each processor?

A: The Intel Core i5-8300H has UHD 630, while the Intel Xeon E3-1585L v5 has Iris Pro Graphics P580.