Intel Core i5-6400 vs Intel Core i7-3610QE Comparison

The Intel Core i5-6400 and Intel Core i7-3610QE present a fascinating generational clash, pitting a newer mid-range desktop chip against an older high-end mobile processor. The data reveals a split personality: the i7-3610QE dominates in Cinebench workloads, while the i5-6400 counters decisively in Geekbench. This makes the choice between them entirely dependent on the specific application, as their architectural differences translate into opposite performance profiles.

Where Each One Wins

The performance landscape is clearly divided by benchmark suite. The Intel Core i7-3610QE demonstrates superior muscle in all six Cinebench tests, with a remarkably consistent advantage. Across Cinebench R15, R20, and R23, the i7-3610QE leads by approximately 20% in both single-core and multi-core tests. This consistency suggests a fundamental throughput advantage in rendering and compute-heavy workloads that leverage the i7's additional threads. The deltaPct values hover tightly between -20.1% and -20.3%, indicating that the i7’s lead is stable regardless of the specific Cinebench version or whether one or all cores are active.

Conversely, the Intel Core i5-6400 achieves its wins in the Geekbench suite, and it does so with overwhelming margins. The i5-6400 scores 3,134 in Geekbench multi-core versus 1,954 for the i7-3610QE, a 60.4% advantage. The single-core gap is even more pronounced: 1,048 versus 560, representing an 87.1% lead for the i5-6400. This suggests the i5-6400 has a vastly superior per-core architecture in Geekbench’s measurement, likely reflecting its newer Skylake design and faster base clock. For users prioritizing Geekbench-heavy tasks, the i5-6400 is the clear winner.

The win count reflects this split: the i7-3610QE takes 6 wins, while the i5-6400 takes 2. However, this raw tally is misleading. The i7’s wins are consistent but narrow, while the i5’s wins are massive. The average benchmark scores are nearly identical, with the i5-6400 at 1,307 and the i7-3610QE at 1,297, a difference of less than 1%. This indicates that neither processor holds a universal advantage, and the "best" choice is entirely workload-dependent.

Architecture Differences

The architectural divide between these two processors is stark. The i5-6400 is built on Intel's 14 nm Skylake process, while the i7-3610QE uses the older 22 nm Ivy Bridge node. This process advantage contributes to the i5-6400’s higher efficiency per transistor, though the i7-3610QE compensates with a larger transistor count of 1,400 million versus the i5-6400’s unspecified count. Die sizes are comparable, with the i5-6400 at 177 mm² and the i7-3610QE at 160 mm².

Core configuration is another key differentiator. Both processors feature 4 physical cores, but the i7-3610QE supports 8 threads via Hyper-Threading, while the i5-6400 is limited to 4 threads. This explains the i7’s advantage in multi-threaded Cinebench tests, as it can process twice as many threads simultaneously. The base clocks differ, with the i5-6400 starting at 2.70 GHz and the i7-3610QE at 2.30 GHz, but both share the same 3.30 GHz boost clock. The higher boost clock of the i5-6400 relative to its base gives it a significant single-thread edge, but the i7’s thread count wins in sustained multi-threaded loads.

Cache hierarchies are identical in size: 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3. The memory support diverges, however. The i5-6400 supports DDR4 memory with a dual-channel bus and a bandwidth of 34.1 GB/s, while the i7-3610QE’s memory type is not specified in the data. The i5-6400 also features PCIe Gen 3 with 16 lanes, while the i7-3610QE’s PCIe configuration is not listed. Integrated graphics differ as well, with the i5-6400 sporting HD Graphics 530 versus the i7-3610QE’s Intel HD 4000, though no performance data for these iGPUs is provided.

The Verdict

The data dictates a clear verdict based on application type. For users running Cinebench or similar rendering workloads, the Intel Core i7-3610QE is the superior choice. Its 8 threads provide a consistent ~20% performance boost across all Cinebench versions, making it the better option for video editing, 3D rendering, and other multi-threaded compute tasks. The i7-3610QE’s 45 W TDP is also lower than the i5-6400’s 65 W, suggesting better power efficiency for sustained workloads, even though it is a mobile part.

For Geekbench-focused tasks, the Intel Core i5-6400 is unequivocally superior. Its 87.1% single-core lead and 60.4% multi-core lead in Geekbench indicate a vastly more efficient architecture for general-purpose computing, web browsing, and single-threaded applications. The i5-6400’s newer Skylake architecture, DDR4 support, and higher base clock make it the better daily driver for mixed use, provided the workload does not heavily depend on thread count.

The average benchmark scores are nearly identical, placing both processors at the 35th percentile of all CPUs. This means neither is a high-end performer, but both are competent mid-range options. The choice hinges on whether the user prioritizes the i7-3610QE’s threading advantage (Cinebench) or the i5-6400’s architectural efficiency (Geekbench). There is no universal winner, only a workload-dependent one.

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The Intel Core i7-3610QE scores 4,533 versus the i5-6400’s 3,614, a 20.3% advantage for the i7.

Q: How much faster is the i5-6400 in Geekbench single-core?

A: The i5-6400 scores 1,048 compared to the i7-3610QE’s 560, giving it an 87.1% lead.

Q: Do both processors have the same number of cores?

A: Yes, both have 4 physical cores, but the i7-3610QE supports 8 threads while the i5-6400 only supports 4.

Q: What is the difference in TDP between the two?

A: The i5-6400 has a TDP of 65 W, while the i7-3610QE has a lower TDP of 45 W.

Q: Are the average benchmark scores similar?

A: Yes, the i5-6400 averages 1,307 and the i7-3610QE averages 1,297, a difference of 0.8%.

Q: Which processor has a faster boost clock?

A: Both share the same 3.30 GHz boost clock, but the i5-6400 has a higher base clock of 2.70 GHz versus 2.30 GHz for the i7-3610QE.

Head-to-Head Benchmarks

The Cinebench results are remarkably uniform in favor of the i7-3610QE. In Cinebench R15 multi-core, the i7-3610QE scores 456 versus the i5-6400’s 364, a 20.2% lead. The single-core R15 test shows a nearly identical margin: 64 versus 51, or 20.3% for the i7. This pattern repeats in R20, where the i7-3610QE achieves 1,903 multi-core and 268 single-core, against the i5-6400’s 1,517 and 214, respectively. The deltas are -20.3% and -20.1%. In R23, the i7-3610QE posts 4,533 multi-core and 639 single-core, versus 3,614 and 510 for the i5-6400, with deltas of -20.3% and -20.2%. The consistency of these margins across all three Cinebench versions and both core-count scenarios is striking, indicating a stable throughput advantage for the i7-3610QE.

The Geekbench results flip the script entirely. In Geekbench multi-core, the i5-6400 scores 3,134 versus 1,954 for the i7-3610QE, a 60.4% advantage. This is a massive gap, far exceeding any of the i7’s Cinebench wins. The single-core test is even more lopsided: the i5-6400 scores 1,048 against the i7-3610QE’s 560, an 87.1% difference. These results suggest that the i5-6400’s Skylake architecture is fundamentally more efficient in Geekbench’s workload, which often favors lower latency and faster per-core execution. The i7-3610QE’s aging Ivy Bridge design, despite its threading advantage, cannot overcome this architectural deficit.

Specification Differences

The two processors differ on several key specification fields. The i5-6400 has a base clock of 2.70 GHz, while the i7-3610QE runs at 2.30 GHz; both boost to 3.30 GHz. The TDP is 65 W for the i5-6400 and 45 W for the i7-3610QE. The socket is different: Intel Socket 1151 for the i5-6400 versus Intel Socket G2 (988B) for the i7-3610QE. The process node is 14 nm for the i5-6400 and 22 nm for the i7-3610QE. The i7-3610QE specifies 1,400 million transistors, while the i5-6400 does not list a count. The die size is 177 mm² for the i5-6400 and 160 mm² for the i7-3610QE. Memory support is DDR4 for the i5-6400 with 34.1 GB/s bandwidth, while the i7-3610QE’s memory type and bandwidth are not specified. The i5-6400 supports PCIe Gen 3 with 16 lanes, whereas the i7-3610QE has no PCIe data listed. Integrated graphics are HD Graphics 530 for the i5-6400 and Intel HD 4000 for the i7-3610QE. The market segments differ: Desktop for the i5-6400 and Mobile for the i7-3610QE. The release dates are 2015-07-01 for the i5-6400 and 2012-04-28 for the i7-3610QE. The i5-6400 has a launch MSRP of $182, while the i7-3610QE has no launch MSRP listed.