Intel Core i5-8600T vs Intel Xeon D-1557 Comparison

The Verdict

The data splits this matchup cleanly by workload. The Intel Xeon D-1557 wins every recorded Cinebench test, but the margins are narrow, ranging from 1.3% to 1.8%. It is a 12-core, 24-thread Broadwell server chip with ECC memory support, a 45W TDP, and an active production status. The Intel Core i5-8600T is a 6-core, 6-thread Coffee Lake desktop chip with a 35W TDP, integrated UHD Graphics 630, and end-of-life status. It trails in every benchmark but offers a much higher boost clock of 3.70 GHz versus 2.10 GHz, plus a larger shared L3 cache of 9 MB.

For server or workstation workloads where ECC memory, 24 threads, and sustained multi-threaded throughput matter, the Xeon D-1557 is the logical pick. Its benchmark wins are consistent across all six Cinebench tests, and its 3,200 million transistor count on a 246 mm² die reflects a design built for dense compute. For desktop users who need integrated graphics, a smaller physical footprint, and lower idle power potential, the i5-8600T is the practical choice, even though it loses every recorded benchmark. The i5-8600T also holds a higher percentile rank in the database at 48 versus 47, with a higher average benchmark score of 2383 versus 2282, so its overall standing in the broader CPU pool is slightly better.

Pick the Xeon D-1557 if you need ECC memory, maximum thread count, and a server-grade feature set. Pick the i5-8600T if you need integrated graphics, a higher boost clock for lightly threaded tasks, and a desktop platform that is end-of-life but still competitive in aggregate scores.

Architecture Differences

The Xeon D-1557 uses the Broadwell architecture, specifically the Broadwell-DE generation, built on a 14 nm process at Intel. It packs 12 cores and 24 threads with a base clock of 1.50 GHz and a boost clock of 2.10 GHz. The die is 246 mm² with 3,200 million transistors. Cache is distributed per core: 64 KB L1, 256 KB L2, and 1.5 MB L3 per core. Memory support includes both DDR3 and DDR4 over a dual-channel bus, and ECC memory is supported. PCIe connectivity is Gen 3 with 24 lanes from the CPU. It uses the Intel BGA 1667 socket and has no integrated graphics. The market segment is Server/Workstation, production status is Active, and it launched with a launch MSRP of $694.

The i5-8600T uses the Coffee Lake architecture, also on a 14 nm process, but with a smaller die at 154 mm². It has 6 cores and 6 threads with a base clock of 2.30 GHz and a boost clock of 3.70 GHz. Cache is 64 KB L1 and 256 KB L2 per core, but L3 is 9 MB shared across all cores, which is a different distribution model than the Xeon. Memory support is DDR4 only over a dual-channel bus with a recorded memory bandwidth of 42.7 GB/s. ECC memory is not supported. PCIe is Gen 3 with 16 lanes from the CPU. It uses the Intel Socket 1151, includes integrated UHD Graphics 630, targets the Desktop segment, and is End-of-life. Its launch MSRP was $213. Neither chip has an unlocked multiplier.

The transistor count is not recorded for the i5-8600T, but its die size is significantly smaller, which reflects the lower core count. The Xeon D-1557 is designed for embedded server tasks with ECC and 24 lanes, while the i5-8600T is a mainstream desktop part with integrated graphics and a higher clock ceiling.

FAQ

Q: Which CPU has more cores and threads?

A: The Xeon D-1557 has 12 cores and 24 threads. The i5-8600T has 6 cores and 6 threads.

Q: Does the i5-8600T support ECC memory?

A: No. The i5-8600T does not support ECC memory. The Xeon D-1557 does support ECC memory.

Q: Which processor has integrated graphics?

A: Only the i5-8600T has integrated graphics, specifically UHD Graphics 630. The Xeon D-1557 has no integrated graphics.

Q: How do their boost clocks compare?

A: The i5-8600T boosts to 3.70 GHz, which is substantially higher than the Xeon D-1557's 2.10 GHz boost.

Q: What is the memory bandwidth of the i5-8600T?

A: The i5-8600T has a recorded memory bandwidth of 42.7 GB/s. The Xeon D-1557 has no recorded memory bandwidth figure in the database.

Q: Which CPU has a higher average benchmark score?

A: The i5-8600T has a higher average benchmark score of 2383, while the Xeon D-1557 scores 2282. The i5-8600T also sits at the 48th percentile, one point above the Xeon's 47th percentile.

Specification Differences

The two CPUs differ on nearly every core specification. Core count: 12 versus 6. Thread count: 24 versus 6. Base clock: 1.50 GHz versus 2.30 GHz. Boost clock: 2.10 GHz versus 3.70 GHz. TDP: 45W versus 35W. Socket: Intel BGA 1667 versus Intel Socket 1151. Architecture generation: Broadwell-DE versus Coffee Lake.

Cache layout differs too. The Xeon D-1557 has 1.5 MB L3 per core, while the i5-8600T has 9 MB shared L3. Memory support: DDR3 and DDR4 versus DDR4 only. ECC: supported versus not supported. PCIe lanes: 24 versus 16. Integrated graphics: none versus UHD Graphics 630. Market segment: Server/Workstation versus Desktop. Production status: Active versus End-of-life. Release date: 2016-02-23 versus 2018-04-01. Launch MSRP: $694 versus $213. Die size: 246 mm² versus 154 mm². Transistor count: 3,200 million versus not recorded. Memory bandwidth: not recorded versus 42.7 GB/s. Part number: SR2M4 versus SR3X3.

Both are 14 nm Intel parts, dual-channel, with 64 KB L1 and 256 KB L2 per core, and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The Xeon D-1557 wins all six recorded Cinebench tests, but the margins are small. In Cinebench R15 multi-core, the Xeon scores 795 against the i5-8600T's 784, a 1.4% lead. In R15 single-core, the Xeon scores 112 versus 110, a 1.8% lead, which is the largest margin in the entire comparison. In Cinebench R20 multi-core, the Xeon scores 3314 versus 3270, a 1.3% lead. In R20 single-core, it scores 467 versus 461, again 1.3%. In Cinebench R23 multi-core, the Xeon scores 7892 versus 7787, a 1.3% lead. In R23 single-core, it scores 1114 versus 1099, a 1.4% lead.

The i5-8600T has no wins in this head-to-head set. However, the database includes additional Geekbench results for the i5-8600T: 4277 multi-core and 1278 single-core. No corresponding Geekbench scores are recorded for the Xeon D-1557, so a direct comparison there is not possible from the data.

The pattern is clear: the Xeon D-1557 is consistently ahead, but never by more than 1.8%. In practical terms, these differences are small enough that real-world application variance could outweigh them. The i5-8600T's higher boost clock of 3.70 GHz does not translate into a single-core win in these tests, suggesting that the Xeon's per-core L3 allocation and architecture compensate for its lower clock speed.

Where Each One Wins

The Xeon D-1557 wins every benchmark where both CPUs have recorded scores. That makes it the outright winner in Cinebench R15, R20, and R23, both multi-core and single-core. Its strengths are 12 cores, 24 threads, ECC memory support, and 24 PCIe lanes. This is a chip for server racks, virtualized workloads, and embedded systems where thread count and reliability features matter more than raw clock speed. The 45W TDP is higher than the i5-8600T's 35W, but the Xeon is still a low-power server part for its core count.

The i5-8600T wins in areas not covered by the head-to-head benchmark set. It has integrated UHD Graphics 630, which the Xeon lacks entirely. It also has a higher base clock of 2.30 GHz and a much higher boost clock of 3.70 GHz, which can benefit bursty, lightly threaded workloads even though the Cinebench single-core tests do not reflect an advantage. Its 42.7 GB/s memory bandwidth is recorded, while the Xeon's is not, and its 9 MB shared L3 cache is a larger unified pool versus the Xeon's per-core allocation. The i5-8600T also holds the higher average benchmark score of 2383 and the higher percentile rank of 48.

For a desktop build where integrated graphics are required, the i5-8600T is the only option. For a server or workstation where ECC memory and 24 threads are non-negotiable, the Xeon D-1557 is the only option. The i5-8600T is also the newer part, released in 2018 versus 2016, and it is end-of-life, which means it is mature and widely understood. The Xeon remains active in production, which suggests ongoing availability for embedded designs.

The database shows six wins for the Xeon and zero for the i5-8600T in direct comparison. But the i5-8600T's aggregate performance profile, including Geekbench scores and a higher average, means it is not a weak part. It simply loses the specific Cinebench tests that both chips share. Use the Xeon for threaded server tasks. Use the i5-8600T for desktop flexibility with integrated graphics and a higher clock ceiling.