Intel Core i5-6500TE vs Intel Xeon E3-1220 v5 Comparison

# Intel Xeon E3-1220 v5 vs Intel Core i5-6500TE

Both CPUs are 14 nm Skylake parts on the same Socket 1151 platform, yet they target different corners of the market. The Xeon E3-1220 v5 is a server/workstation part with ECC support, while the Core i5-6500TE is a low-power desktop chip with integrated graphics. Benchmark data shows a consistent, sizable gap between them, but the i5-6500TE counters with dramatically lower power draw and a lower launch price. The question is whether raw performance or efficiency matters more for a given workload.

Head-to-Head Benchmarks

The Xeon E3-1220 v5 wins every single benchmark in the head-to-head comparison, taking all six tests. The margins are remarkably uniform across both multi-core and single-core workloads, ranging from 13.3% to 14%. In Cinebench R15 multi-core, the Xeon scores 488 against the i5-6500TE's 428, a 14% advantage. Single-core R15 shows a similar story: 68 versus 60, a 13.3% edge. This consistency suggests the performance gap is largely a function of clock speed rather than workload-specific architectural advantages.

Moving to newer Cinebench versions, the pattern holds. In R20 multi-core, the Xeon posts 2034 versus 1787, a 13.8% lead. Single-core R20 shows 287 versus 252, a 13.9% delta. The R23 results are almost identical in percentage terms: multi-core 4845 versus 4255 (13.9%) and single-core 684 versus 600 (14%). The fact that the delta stays pinned near 14% across all six tests indicates a straightforward clock-for-clock comparison between two otherwise similar Skylake cores.

The average benchmark scores tell a slightly different story. The Xeon's average is 1401, while the i5-6500TE sits at 1399 — a mere 0.1% difference. That nearly identical aggregate score is curious given the consistent 14% gaps in the head-to-head tests. The explanation lies in the benchmark sets: the i5-6500TE has additional Geekbench results (multi-core 2749, single-core 1062) that are not part of the head-to-head comparison, and these Geekbench scores likely pull its average up relative to the Cinebench-only head-to-head results.

Neither chip is a performance standout globally. Both sit at the 37th percentile among all CPUs, meaning roughly two-thirds of processors in the database outperform them on average. The Xeon's nearest rivals include the Intel Xeon E-2104G (avg score 1402, 0% delta) and the Intel Pentium Gold G7400TE (1404, -0.2%), indicating it's clustered with entry-level server and desktop parts. The i5-6500TE's nearest rival list is nearly identical, with the Xeon E3-1220 v5 itself at a 0.1% delta.

Architecture Differences

Both chips are built on Intel's 14 nm process and share the same Skylake microarchitecture, with the Xeon's codename being Skylake-DT and the i5's simply Skylake. Both use a 122 mm² die size and have dual-channel DDR3/DDR4 memory support with 34.1 GB/s bandwidth. The PCIe configuration is identical: Gen 3 with 16 lanes from the CPU. This is not a case of different silicon generations — the cores themselves are architecturally equivalent.

The differences are in configuration and feature set. The Xeon has 4 cores and 4 threads at a base clock of 3.00 GHz and boost clock of 3.50 GHz. The i5-6500TE also has 4 cores and 4 threads, but its base clock is 2.30 GHz and boost is 3.30 GHz. That 0.70 GHz base clock deficit and 0.20 GHz boost deficit explains the consistent 14% performance gap — the Xeon simply runs faster.

Cache is another differentiator. The Xeon carries 8 MB of shared L3 cache, while the i5-6500TE has 6 MB. Both have identical L1 (64 KB per core) and L2 (256 KB per core). The extra 2 MB of L3 on the Xeon could help in cache-sensitive workloads, though the benchmark data doesn't show any test where the i5 closes the gap, suggesting the clock speed advantage is the dominant factor.

ECC memory support is a major architectural split. The Xeon supports ECC memory, while the i5-6500TE does not. This is a hard feature boundary: the Xeon is designed for server/workstation reliability, while the i5 is a desktop part. The i5 does include integrated HD Graphics 530, whereas the Xeon has no integrated graphics at all — a significant difference for systems that don't use a discrete GPU.

The transistor count differs as well. The Xeon lists 1,750 million transistors, while the i5-6500TE's count is not specified in the data. Given the shared die size and process node, the actual silicon is likely similar, but the Xeon's larger L3 cache may account for additional transistor budget.

Where Each One Wins

The Xeon E3-1220 v5 wins in every benchmark category tested. Multi-core workloads favor it by 13.8% to 14% across R15, R20, and R23, making it the clear choice for rendering, compilation, or any parallel workload that can use four threads. Single-core performance is similarly ahead at 13.3% to 14%, so even lightly threaded applications like older games or office software will see a measurable improvement. The Xeon's higher base and boost clocks (3.00/3.50 GHz versus 2.30/3.30 GHz) give it an across-the-board advantage in both sustained and burst workloads.

Where the i5-6500TE wins is in power efficiency and specific feature requirements. Its TDP is 35 watts versus 80 watts for the Xeon — a dramatic difference that makes the i5 suitable for passively cooled or fanless systems, small form factor builds, and always-on appliances. The i5 also includes integrated HD Graphics 530, eliminating the need for a discrete GPU in basic display output scenarios. For a system that needs ECC memory, the i5 is simply not an option — only the Xeon qualifies.

The i5's lower launch MSRP of $192 versus the Xeon's $203 is a minor cost difference, though neither chip is current production (both are end-of-life). The i5's release date is slightly earlier (2015-10-10 versus 2015-10-18), but both are from the same Skylake generation.

FAQ

Q: Which CPU is faster in multi-core benchmarks?

A: The Intel Xeon E3-1220 v5 wins all multi-core tests by 13.8% to 14%. In Cinebench R23 multi-core, it scores 4845 versus the i5-6500TE's 4255.

Q: Do both CPUs support ECC memory?

A: No. The Xeon E3-1220 v5 supports ECC memory, while the Core i5-6500TE does not. This is a fundamental feature split between the server and desktop segments.

Q: Which CPU has integrated graphics?

A: Only the Core i5-6500TE includes integrated graphics (HD Graphics 530). The Xeon E3-1220 v5 has no integrated graphics and requires a discrete GPU for display output.

Q: How do their power requirements compare?

A: The i5-6500TE has a TDP of 35 watts, while the Xeon E3-1220 v5 is rated at 80 watts. This makes the i5 substantially more power-efficient, though the Xeon's higher TDP enables its higher clock speeds.

Q: Are there any benchmark categories where the i5-6500TE wins?

A: In the head-to-head benchmark data, the Xeon wins all six tests. The i5-6500TE has additional Geekbench scores (multi-core 2749, single-core 1062) that are not compared directly, but its average benchmark score of 1399 is slightly lower than the Xeon's 1401.

Q: What is the performance difference in single-core workloads?

A: The Xeon leads by 13.3% in Cinebench R15 single-core (68 versus 60) and 14% in R23 single-core (684 versus 600). The gap is consistent at roughly 13.3% to 14% across all single-core tests.

The Verdict

The benchmark data presents a clear hierarchy: the Xeon E3-1220 v5 is the faster processor in every measured test, with a consistent 13.3% to 14% advantage across all Cinebench versions. Its higher base and boost clocks (3.00/3.50 GHz versus 2.30/3.30 GHz) and larger 8 MB L3 cache (versus 6 MB) combine to deliver this edge. The Xeon also adds ECC memory support, making it the only choice for reliability-critical server or workstation builds.

The Core i5-6500TE's case rests entirely on efficiency and integration. Its 35 watt TDP is less than half the Xeon's 80 watts, opening up passive cooling and compact system designs that the Xeon cannot match. The integrated HD Graphics 530 means the i5 can run a full desktop system with no discrete GPU, which is impossible with the Xeon. For a low-power appliance, HTPC, or basic office machine, the i5's performance is still respectable — its 4255 R23 multi-core score is no slouch — but it gives up 13.9% to the Xeon in that test.

The average benchmark scores being nearly identical (1401 versus 1399, a 0.1% delta) is a statistical artifact of the i5's Geekbench results, but it underscores that neither chip is far from the other in overall capability. Both sit at the 37th percentile globally. The Xeon is the pick for anyone who needs maximum throughput and ECC support. The i5 is the pick for anyone who needs minimal power draw, integrated graphics, or both. The market segments barely overlap, and the data suggests buyers should choose based on those needs rather than raw performance alone.

Specification Differences

| Specification | Intel Xeon E3-1220 v5 | Intel Core i5-6500TE |

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

| Base Clock | 3.00 GHz | 2.30 GHz |

| Boost Clock | 3.50 GHz | 3.30 GHz |

| TDP | 80 W | 35 W |

| L3 Cache | 8 MB (shared) | 6 MB (shared) |

| Transistors | 1,750 million | Not specified |

| ECC Memory | Yes | No |

| Integrated Graphics | None | HD Graphics 530 |

| Market Segment | Server/Workstation | Desktop |

| Release Date | 2015-10-18 | 2015-10-10 |

| Launch MSRP | $203 | $192 |

| Part Number | SR2LG | SR2LR |

| Codename | Skylake-DT | Skylake |