Intel Core i7-3610QM vs Intel Xeon E5645 Comparison

The Verdict

The benchmark data is unambiguous: the Intel Core i7-3610QM wins every recorded head-to-head test against the Intel Xeon E5645, six wins to zero. The mobile Ivy Bridge part is the faster processor in this comparison, despite the Xeon having more cores and a larger cache. The i7-3610QM leads by a consistent margin of 4.4% to 5.1% across all Cinebench workloads, both single-core and multi-core. The average benchmark score confirms the trend: the i7-3610QM sits at 1244, while the Xeon E5645 records 1211. The Xeon's nearest rival is itself, the Intel Core i3-7300T, with a 0% delta, while the i7-3610QM edges out the Intel Pentium Gold G6600 and Core i3-8109U by 0.7%.

For a user choosing between these two, the decision rests on platform requirements rather than raw performance. The i7-3610QM is the superior choice for anyone needing higher clock speeds, a newer PCIe implementation, integrated graphics, and lower power consumption. The Xeon E5645 is the only option for those requiring ECC memory support and a six-core configuration, though it delivers less performance in every benchmark recorded. The data shows no scenario where the Xeon wins a performance contest. The i7-3610QM is the pick for general computing, single-threaded workloads, and most multi-threaded tasks. The Xeon E5645 is the pick only for legacy server or workstation platforms that demand ECC memory and a triple-channel memory bus.

Architecture Differences

The two processors come from different Intel design eras and target entirely different market segments. The i7-3610QM is a mobile part built on the Ivy Bridge architecture at a 22 nm process node, while the Xeon E5645 is a server and workstation chip based on Westmere-EP at a 32 nm node. The transistor counts reflect this generation gap: the i7-3610QM packs 1,400 million transistors into a 160 mm² die, while the Xeon E5645 uses 1,170 million transistors across a larger 239 mm² die. The smaller process node gives the i7-3610QM a density advantage, fitting more transistors into less silicon.

Core and thread counts favor the Xeon on paper. The E5645 provides six cores and twelve threads, while the i7-3610QM offers four cores and eight threads. However, the i7-3610QM compensates with substantially higher clock speeds. Its base clock runs at 2.30 GHz with a boost to 3.30 GHz, whereas the Xeon operates at 2.40 GHz base and only 2.67 GHz boost. The boost delta is significant: the i7-3610QM can ramp 0.63 GHz higher under load, which explains its consistent single-core wins.

Cache architecture also differs meaningfully. Both parts share 64 KB of L1 and 256 KB of L2 per core, but the L3 cache is split unevenly. The i7-3610QM has 6 MB of shared L3, while the Xeon E5645 carries 12 MB of shared L3. The Xeon's larger cache does not translate into benchmark victories in this data set, likely because the i7's faster clocks and newer architecture overcome the cache deficit.

Memory support diverges as well. Both support DDR3, but the i7-3610QM uses a dual-channel memory bus with 25.6 GB/s of bandwidth, while the Xeon E5645 uses a triple-channel bus with no recorded bandwidth figure. The Xeon also supports ECC memory, a feature absent from the i7-3610QM. PCIe generations differ: the i7-3610QM has PCIe Gen 3 with 16 lanes from the CPU, while the Xeon E5645 is limited to PCIe Gen 2. The i7-3610QM includes integrated Intel HD 4000 graphics; the Xeon has no integrated graphics at all.

Power and platform requirements separate these further. The i7-3610QM draws a 45 W TDP and fits the Intel Socket G2 (988B), while the Xeon E5645 consumes 80 W and requires Intel Socket 1366. The mobile part is built for laptops and compact systems; the server part demands a full workstation or server board.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i7-3610QM wins every multi-core test. It scores 440 in Cinebench R15 multi-core versus 421 for the Xeon E5645, a 4.5% lead. In R20 multi-core, the i7 scores 1836 against 1758, and in R23 multi-core it scores 4373 against 4187, both representing 4.4% advantages.

Q: Does the Xeon E5645's six-core design outperform the i7-3610QM's four cores?

A: No. Despite having two more cores and four more threads, the Xeon E5645 loses all six recorded head-to-head benchmarks. The i7-3610QM's higher boost clock of 3.30 GHz versus 2.67 GHz and its newer Ivy Bridge architecture overcome the core count disadvantage.

Q: Which processor supports ECC memory?

A: The Intel Xeon E5645 supports ECC memory. The Intel Core i7-3610QM does not list ECC memory support in its specifications. This is a deciding factor for users building systems that require error-correcting memory.

Q: How do the single-core scores compare?

A: The i7-3610QM leads in all single-core tests. In Cinebench R15 single-core, it scores 62 versus 59, a 5.1% lead. In R20, it scores 259 versus 248, and in R23, it scores 617 versus 591, both showing 4.4% advantages.

Q: What is the power consumption difference?

A: The i7-3610QM has a TDP of 45 W, while the Xeon E5645 has a TDP of 80 W. The mobile part consumes nearly half the power of the server chip, making it more suitable for thermally constrained systems.

Q: Do these processors have integrated graphics?

A: The Intel Core i7-3610QM includes Intel HD 4000 integrated graphics. The Intel Xeon E5645 has no integrated graphics, requiring a discrete GPU for any display output.

Specification Differences

| Specification | Intel Core i7-3610QM | Intel Xeon E5645 |

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

| Cores | 4 | 6 |

| Threads | 8 | 12 |

| Base Clock | 2.30 GHz | 2.40 GHz |

| Boost Clock | 3.30 GHz | 2.67 GHz |

| TDP | 45 W | 80 W |

| Socket | Intel Socket G2 (988B) | Intel Socket 1366 |

| Architecture | Ivy Bridge | Westmere |

| Codename | Ivy Bridge | Westmere-EP |

| Process Node | 22 nm | 32 nm |

| Transistors | 1,400 million | 1,170 million |

| Die Size | 160 mm² | 239 mm² |

| L3 Cache | 6 MB (shared) | 12 MB (shared) |

| Memory Bus | Dual-channel | Triple-channel |

| Memory Bandwidth | 25.6 GB/s | Not recorded |

| ECC Memory | No | Yes |

| PCIe | Gen 3, 16 Lanes (CPU only) | Gen 2 |

| Integrated Graphics | Intel HD 4000 | None |

| Market Segment | Mobile | Server/Workstation |

| Release Date | 2012-04-22 | 2010-03-15 |

| Launch MSRP | $378 | Not recorded |

| Part Number | SR0MN | SLBWZ |

Head-to-Head Benchmarks

The recorded data contains six head-to-head benchmark comparisons, all from the Cinebench suite, and the Intel Core i7-3610QM wins every one. The largest margin comes in Cinebench R15 single-core, where the i7-3610QM scores 62 against the Xeon E5645's 59, a 5.1% difference. That test highlights the mobile chip's clock advantage: the 3.30 GHz boost speed versus 2.67 GHz provides a meaningful single-threaded edge.

The multi-core tests show consistent but slightly smaller leads. In Cinebench R15 multi-core, the i7-3610QM scores 440 versus 421, a 4.5% win. Cinebench R20 multi-core sees 1836 against 1758, a 4.4% lead. Cinebench R23 multi-core shows 4373 versus 4187, also 4.4%. The fact that the i7-3610QM wins multi-core tests despite having only four cores against the Xeon's six cores is notable. The newer architecture and higher sustained clocks apparently compensate for the two-core deficit.

Single-core results in R20 and R23 repeat the pattern. The i7-3610QM scores 259 in R20 single-core versus 248, and 617 in R23 single-core versus 591, both 4.4% advantages. The consistent 4.4% to 5.1% delta across all tests suggests a systematic clock and IPC advantage rather than workload-specific behavior.

The average benchmark scores align with the head-to-head results. The i7-3610QM averages 1244, placing it among rivals like the Intel Pentium Gold G6600 and Core i3-8109U, both at 1235 with 0.7% deltas, and the Xeon E3-1235L v5 at 1232 with a 1% delta. The Xeon E5645 averages 1211, matching the Core i3-7300T exactly at 0% delta and slightly trailing the Xeon E5-1607 v3 at 1212. Both CPUs sit at the 34th percentile of all processors in the database, indicating they occupy a similar tier overall, but the i7-3610QM consistently outperforms within that tier.

Where Each One Wins

The Intel Core i7-3610QM wins every recorded benchmark, so its strengths are straightforward. It dominates in single-core performance, taking 5.1% leads in Cinebench R15 single-core and 4.4% leads in R20 and R23 single-core. This makes it the better choice for applications that rely on per-thread speed, such as older software, lightly threaded games, and everyday desktop tasks. It also wins multi-core tests by 4.4% to 4.5%, meaning even heavily threaded workloads like video encoding or 3D rendering run faster on the mobile chip. The 45 W TDP makes it far more power-efficient than the Xeon's 80 W, and the integrated HD 4000 graphics remove the need for a separate GPU in basic systems. The PCIe Gen 3 support with 16 CPU lanes offers newer connectivity compared to the Xeon's PCIe Gen 2.

The Intel Xeon E5645 has no benchmark wins, but its specification sheet reveals where it holds practical advantages. The six-core, twelve-thread configuration provides more parallel resources for workloads that scale with core count, even though the recorded Cinebench results do not show an advantage. The 12 MB of shared L3 cache doubles the i7-3610QM's 6 MB, potentially benefiting data-heavy server workloads that are not represented in these benchmarks. ECC memory support is a definitive feature for mission-critical systems where data integrity is paramount. The triple-channel memory bus offers a wider path to memory, though no bandwidth figure is recorded. The server and workstation market segment implies a platform designed for sustained operation and reliability, even at a higher 80 W TDP.

For a user, the choice is clear: the i7-3610QM is the faster processor in every measured test, and its lower power draw and integrated graphics make it more versatile. The Xeon E5645 is only preferable when the platform specifically requires ECC memory or a six-core server CPU, and even then, the performance data shows it will be slower in the recorded Cinebench workloads.