Intel Core i7-3610QM vs Intel Xeon D-1520 Comparison

The Intel Core i7-3610QM and the Intel Xeon D-1520 are an unusual matchup: a retired mobile quad-core from the Ivy Bridge era facing a server-oriented Broadwell-DE part that is still listed as active in the database. Both are 4-core, 8-thread processors with a 45 W TDP, and both sit at the 34th percentile versus all CPUs in the database. Yet the recorded benchmarks tell a consistent story: the i7-3610QM wins all six head-to-head Cinebench comparisons, by margins between 4.5 and 5.1 percent. The Xeon D-1520 counters with platform features the mobile part simply does not have, including ECC memory support, 24 PCIe Gen 3 lanes, and dual DDR3/DDR4 memory compatibility.

Head-to-Head Benchmarks

The Cinebench results are uniform, which makes them easy to interpret. In Cinebench R15 multi-core the i7-3610QM scores 440 against 421 for the Xeon D-1520, a 4.5 percent win. Single-core R15 goes the same way: 62 to 59, a 5.1 percent gap, the largest margin in the dataset.

Cinebench R20 repeats the pattern. Multi-core ends at 1836 versus 1755, a 4.6 percent advantage for the i7, while single-core lands at 259 versus 247, a 4.9 percent gap. Cinebench R23 is no different: 4373 versus 4179 in multi-core (4.6 percent) and 617 versus 590 in single-core (4.6 percent).

The sweep finishes at six wins to zero for the i7-3610QM. Two things stand out. First, the margins cluster tightly between roughly four and five percent, so there is no workload in the recorded set where the Xeon D-1520 comes close to flipping a result. Second, the single-core gaps mirror the multi-core gaps almost exactly, which tells you the difference comes down to clock behavior rather than core count or cache. The i7 boosts to 3.30 GHz versus 2.60 GHz for the Xeon, and the benchmark data shows exactly the kind of uniform scaling you would expect from that difference.

Context matters here. Neither chip is fast by database standards. Both sit in the 34th percentile versus all CPUs, and the i7's average benchmark score of 1244 lands it within one percent of parts like the Intel Pentium Gold G6600 and the Intel Core i3-8109U. The Xeon D-1520's average of 1209 is effectively identical to the Intel Core i3-8121U and the Intel Xeon D-1527. These are entry-level performance brackets, and the head-to-head gap between them, roughly 35 points on average score, is small in absolute terms.

Architecture Differences

The architectural gap between these two is a full two-node jump. The i7-3610QM is built on Intel's 22 nm Ivy Bridge design, with 1,400 million transistors on a 160 mm² die. The Xeon D-1520 uses the newer 14 nm Broadwell-DE design, packing 3,200 million transistors into a 246 mm² die. Despite the denser node and more than double the transistor count, the Xeon does not convert that into higher recorded performance, largely because its clocks are much lower: 2.20 GHz base and 2.60 GHz boost, against 2.30 GHz base and 3.30 GHz boost for the i7.

Core topology is identical: four cores, eight threads on both. Cache configuration is not. The i7 pairs 64 KB of L1 and 256 KB of L2 per core with a 6 MB shared L3. The Xeon also has 64 KB of L1 and 256 KB of L2 per core, but its L3 is organized as 1.5 MB per core. The Xeon's server orientation shows up elsewhere: it supports ECC memory and accepts both DDR3 and DDR4 on a dual-channel bus, while the i7 is DDR3-only with no ECC support. The i7 carries integrated graphics in the form of Intel HD 4000; the Xeon D-1520 has none, which is normal for a part aimed at headless server and workstation deployments.

PCIe connectivity also favors the Xeon: 24 Gen 3 lanes from the CPU versus 16 Gen 3 lanes on the i7. Platform integration differs too. The i7 uses Socket G2 (988B), a mobile socket, while the Xeon is soldered via BGA 1667. Neither chip has an unlocked multiplier. The i7 launched at $378 MSRP in 2012 as a mobile part; the Xeon launched at $199 MSRP in 2015 for the server and workstation segment.

The Verdict

The data supports a simple split. If the goal is raw CPU throughput in the recorded workloads, the i7-3610QM is the pick: it wins every benchmark, by 4.5 to 5.1 percent, on the strength of a much higher boost clock. Its Intel HD 4000 integrated graphics also mean it can drive a display without a discrete GPU, which the Xeon cannot do at all.

If the goal is a stable, always-on system, the Xeon D-1520 is the better foundation despite losing every benchmark. ECC support matters for data integrity, DDR4 compatibility gives it a memory path the i7 lacks, and 24 PCIe Gen 3 lanes allow more attached devices than the i7's 16. Its BGA packaging and server-segment validation reinforce that it belongs in an appliance-style or embedded deployment, not a desktop or laptop.

Note also the production status. The i7-3610QM is end-of-life, released in 2012. The Xeon D-1520 is listed as active in the database. For anyone specifying new hardware, that status difference may matter more than the 4.6 percent performance gap.

Specification Differences

| Field | Intel Core i7-3610QM | Intel Xeon D-1520 |

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

| Base clock | 2.30 GHz | 2.20 GHz |

| Boost clock | 3.30 GHz | 2.60 GHz |

| Architecture | Ivy Bridge | Broadwell (Broadwell-DE) |

| Process node | 22 nm | 14 nm |

| Transistors | 1,400 million | 3,200 million |

| Die size | 160 mm² | 246 mm² |

| L3 cache | 6 MB shared | 1.5 MB per core |

| Memory support | DDR3 | DDR3, DDR4 |

| ECC memory | No | Yes |

| PCIe lanes | Gen 3, 16 lanes | Gen 3, 24 lanes |

| Integrated graphics | Intel HD 4000 | None |

| Socket | Socket G2 (988B) | BGA 1667 |

| Market segment | Mobile | Server/Workstation |

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

| Launch MSRP | $378 | $199 |

| Average benchmark score | 1244 | 1209 |

Everything else is common ground: four cores, eight threads, 45 W TDP, 64 KB L1 and 256 KB L2 per core, dual-channel memory bus, Intel foundry, and a locked multiplier.

FAQ

Q: Which CPU is faster in benchmarks? A: The Core i7-3610QM. It wins all six recorded Cinebench tests, with margins of 4.5 percent in R15 multi-core, 5.1 percent in R15 single-core, 4.6 percent in R20 multi-core, 4.9 percent in R20 single-core, and 4.6 percent in both R23 multi-core and single-core.

Q: Why does the older 22 nm chip beat the newer 14 nm chip? A: Clock speed. The i7-3610QM boosts to 3.30 GHz while the Xeon D-1520 tops out at 2.60 GHz, and the uniformly scaled benchmark results across single-core and multi-core tests reflect that clock gap rather than any architectural advantage.

Q: Do both CPUs have the same core and thread count? A: Yes. Both are 4-core, 8-thread processors, and both have a 45 W TDP, so the performance difference comes entirely from other factors.

Q: Which one supports ECC memory? A: Only the Xeon D-1520. It also supports DDR4 in addition to DDR3, whereas the i7-3610QM supports DDR3 only and has no ECC capability.

Q: Which CPU has integrated graphics? A: The i7-3610QM includes Intel HD 4000 graphics. The Xeon D-1520 has no integrated graphics and requires a discrete GPU or a separate display solution.

Q: Are both CPUs still in production? A: No. The i7-3610QM is listed as end-of-life. The Xeon D-1520 is listed as active in the database.

Where Each One Wins

The i7-3610QM wins on: any workload measured in the database. All six Cinebench tests go its way, multi-core and single-core alike, by 4.5 to 5.1 percent. It is the better choice for general compute, rendering, and anything sensitive to single-thread speed, and its Intel HD 4000 graphics let it operate without a discrete GPU. Its Socket G2 (988B) packaging also makes it replaceable, unlike the soldered Xeon.

The Xeon D-1520 wins on: platform characteristics, not benchmark scores. ECC memory support for data integrity, dual DDR3/DDR4 compatibility, 24 PCIe Gen 3 lanes for expansion, and active production status make it the right fit for server, workstation, and embedded deployments where reliability and connectivity outrank raw throughput. Its launch MSRP of $199 versus $378 for the i7 also reflects its positioning, though the i7 is end-of-life in any case.

The bottom line from the recorded data: these two parts are separated by less than five percent in performance but by a wide margin in purpose. Pick the i7 for speed in a mobile or desktop-replacement context, and the Xeon for a resilient, expandable, always-on system.