CPU Comparison
Intel Core i5-8400T
Xeon E-2276M
PERFORMANCE BENCHMARKS
Analysis: Intel Core i5-8400T vs Intel Xeon E-2276M
The Verdict
The benchmark data splits these two Coffee Lake processors into distinct roles. The Intel Core i5-8400T wins six of eight head-to-head tests, dominating every Cinebench workload (R15, R20, R23) in both single-core and multi-core runs. The Intel Xeon E-2276M wins the two Geekbench tests by a wide margin. If the priority is Cinebench-style rendering throughput, the i5-8400T is the clear choice. If the priority is Geekbench-measured general compute, the Xeon E-2276M takes over. The i5-8400T also carries a lower 35W TDP versus the Xeon’s 45W, making it the more power-conscious option. The Xeon E-2276M, however, brings ECC memory support and 12 threads versus 6, which matters for workstation reliability. The data suggests: pick the i5-8400T for raw Cinebench performance and efficiency; pick the Xeon E-2276M for Geekbench-dominant workloads and ECC validation.
Architecture Differences
Both processors use the same 14 nm process node from Intel, with an identical die size of 154 mm². The architecture is listed as Coffee Lake for the i5-8400T and Coffee Lake-H for the Xeon E-2276M, with the Xeon belonging to the Xeon E-2200 series. Core count is identical at 6, but the Xeon doubles the thread count to 12 via Hyper-Threading, whereas the i5-8400T runs 6 threads. The Xeon’s base clock is 2.80 GHz with a boost of 4.70 GHz, considerably higher than the i5-8400T’s 1.70 GHz base and 3.30 GHz boost. L3 cache differs: the i5-8400T has 9 MB shared, while the Xeon has 12 MB shared. L1 and L2 caches are the same per-core (64 KB and 256 KB). Memory support is DDR4 dual-channel with identical 42.7 GB/s bandwidth, but the Xeon adds ECC memory support, which the i5-8400T lacks. Integrated graphics also differ: the i5-8400T uses UHD Graphics 630, while the Xeon uses UHD Graphics P630. Both have PCIe Gen 3 with 16 CPU lanes, and both are end-of-life products with locked multipliers.
Head-to-Head Benchmarks
The i5-8400T’s Cinebench results are uniformly ahead. In Cinebench R15 multicore, it scores 633 against the Xeon’s 544, a delta of 16.4%. The single-core R15 result is 89 versus 76, a 17.1% lead. Moving to R20, the i5-8400T posts 2638 multicore and 372 single-core, versus 2268 and 320 for the Xeon, both deltas at 16.3%. R23 repeats the pattern: 6282 vs 5400 multicore and 886 vs 762 single-core, again with a 16.3% delta. These are consistent margins, suggesting a systematic advantage in Cinebench across all versions tested. The Xeon’s higher boost clock (4.70 GHz vs 3.30 GHz) does not translate into Cinebench wins; instead, the i5-8400T’s lower TDP appears to correlate with better Cinebench throughput. The Geekbench results flip the script. The Xeon E-2276M scores 5159 multicore versus 4011 for the i5-8400T, a 22.3% advantage. Single-core Geekbench shows 1440 vs 1100, a 23.6% lead for the Xeon. These are large deltas, nearly double the Cinebench margins in percentage terms. The Xeon wins 2 tests; the i5-8400T wins 6. The average benchmark score is almost identical: 2001 for the i5-8400T and 1996 for the Xeon, placing both near the 44th-45th percentile of all CPUs.
Specification Differences
| Field | Intel Core i5-8400T | Intel Xeon E-2276M |
|---|---|---|
| Threads | 6 | 12 |
| Base Clock | 1.70 GHz | 2.80 GHz |
| Boost Clock | 3.30 GHz | 4.70 GHz |
| TDP | 35 W | 45 W |
| Socket | Intel Socket 1151 | Intel BGA 1440 |
| Architecture | Coffee Lake | Coffee Lake-H |
| Generation | Core i5 (Coffee Lake) | Xeon E (Coffee Lake) |
| L3 Cache | 9 MB (shared) | 12 MB (shared) |
| ECC Memory | No | Yes |
| Integrated Graphics | UHD Graphics 630 | UHD Graphics P630 |
| Market Segment | Desktop | Server/Workstation |
| Launch MSRP | $182 | $450 |
| Release Date | 2018-04-01 | 2019-05-28 |
| Part Number | SR3X6 | SRFCK |
The Xeon E-2276M costs $450 at launch, while the i5-8400T launched at $182. The Xeon also released over a year later. The i5-8400T uses a desktop socket (1151), while the Xeon is a mobile/workstation BGA 1440 part. The Xeon’s 12 MB L3 is 33% larger than the i5’s 9 MB. Both support DDR4 dual-channel memory at 42.7 GB/s, but only the Xeon supports ECC. The i5-8400T has a 35W TDP; the Xeon draws 45W.
FAQ
Q: Which processor has more threads?
A: The Intel Xeon E-2276M has 12 threads, while the Intel Core i5-8400T has 6 threads. Both have 6 physical cores.
Q: Does the Xeon E-2276M support ECC memory?
A: Yes, the Xeon E-2276M supports ECC memory. The i5-8400T does not support ECC.
Q: Which CPU wins the Cinebench R23 multicore test?
A: The Intel Core i5-8400T wins Cinebench R23 multicore with a score of 6282, compared to the Xeon E-2276M’s 5400, a 16.3% margin.
Q: Which CPU wins Geekbench multicore?
A: The Intel Xeon E-2276M wins Geekbench multicore with 5159 points, versus 4011 for the i5-8400T, a 22.3% advantage.
Q: What are the TDP values for these two processors?
A: The i5-8400T has a TDP of 35W, while the Xeon E-2276M has a TDP of 45W.
Q: Are both processors on the same process node?
A: Yes, both use Intel’s 14 nm process node and have the same die size of 154 mm².
Where Each One Wins
The Intel Core i5-8400T wins in every Cinebench test, R15, R20, and R23, for both single-core and multicore. This makes it the stronger choice for rendering workloads that rely on Cinebench-style CPU performance. The consistent 16.3% to 17.1% deltas across all Cinebench versions indicate a stable advantage that scales with the benchmark. Its 35W TDP also makes it more suitable for power-constrained desktop builds. The i5-8400T wins 6 out of 8 head-to-head benchmarks, and its average score (2001) is marginally higher than the Xeon’s (1996). For users running Cinebench-family workloads, the data is unambiguous.
The Intel Xeon E-2276M wins both Geekbench tests, with a 22.3% multicore advantage and a 23.6% single-core advantage. This suggests it is better optimized for Geekbench-measured integer and floating-point workloads. The Xeon’s 12 threads and 12 MB L3 cache likely contribute to its Geekbench multicore lead, while its higher boost clock (4.70 GHz) may help in single-core Geekbench. The Xeon also supports ECC memory, which is critical for error-checking in workstation or server environments. Its higher 45W TDP and $450 launch MSRP reflect its workstation positioning. If the workload is Geekbench-heavy or requires ECC validation, the Xeon E-2276M is the data-backed pick.
The two CPUs are nearly tied in overall average benchmark score (2001 vs 1996) and percentile rank (45th vs 44th). This near-parity in aggregate metrics contrasts sharply with the benchmark-specific splits. The i5-8400T dominates one benchmark family; the Xeon dominates another. Users should match the CPU to the specific benchmark suite that mirrors their actual applications. The i5-8400T’s lower TDP and lower launch MSRP give it an efficiency and cost edge, while the Xeon’s ECC support and higher thread count serve reliability and parallel compute needs. Neither CPU is a universal winner; each excels in distinct measurement domains.