Intel Core i5-6500T vs Intel Core i7-3615QE Comparison

The Intel Core i7-3615QE and Intel Core i5-6500T represent two distinct design philosophies: one is a mobile quad-core with hyper-threading from the Ivy Bridge era, the other is a low-power desktop quad-core from the Skylake generation. Despite the newer architecture of the i5-6500T, the benchmark data consistently shows the older i7-3615QE pulling ahead in every recorded Cinebench test, making this a compelling case study in how core count and threading can outweigh process node advantages.

FAQ

Q: Which processor has more threads?

A: The Intel Core i7-3615QE has 8 threads thanks to hyper-threading, while the Intel Core i5-6500T has 4 threads, as it lacks that feature.

Q: How do their average benchmark scores compare?

A: The i7-3615QE has an average benchmark score of 1381, while the i5-6500T scores 1362. Both processors sit at the 36th percentile compared to all CPUs in the database.

Q: What is the biggest performance gap between them?

A: The largest recorded gap is 17.9% in favor of the i7-3615QE, seen in both the Cinebench R15 multicore and Cinebench R20 singlecore tests.

Q: Do both processors support ECC memory?

A: No, neither the Intel Core i7-3615QE nor the Intel Core i5-6500T supports ECC memory; both have this feature marked as false.

Q: What are the power consumption ratings for each chip?

A: The Intel Core i7-3615QE has a TDP of 45 watts, while the Intel Core i5-6500T has a lower TDP of 35 watts.

Q: Which processor has a smaller manufacturing process?

A: The Intel Core i5-6500T uses a 14 nm process node, while the Intel Core i7-3615QE uses a larger 22 nm process node.

Architecture Differences

The fundamental architectural split between these two chips comes down to generation and design intent. The Intel Core i7-3615QE is built on the Ivy Bridge architecture using a 22 nm manufacturing process, fabricated by Intel with 1,400 million transistors on a 160 mm² die. It is a mobile processor (market segment: Mobile) designed for laptops and compact systems, using the Intel BGA 1023 socket. Its core configuration is 4 physical cores with 8 threads, enabled through hyper-threading, which allows it to process more simultaneous workloads than its physical core count suggests.

In contrast, the Intel Core i5-6500T uses the newer Skylake architecture on a 14 nm process node, also fabricated by Intel, with a smaller die size of 122 mm². Its market segment is Desktop, and it uses the Intel Socket 1151. The i5-6500T is a straight 4-core, 4-thread part with no hyper-threading, meaning each core handles exactly one thread. The i5-6500T also carries a more modern integrated graphics solution (HD Graphics 530) compared to the i7-3615QE's Intel HD 4000.

Memory support is another clear differentiator. The i5-6500T explicitly supports both DDR3 and DDR4 memory with a memory bandwidth of 34.1 GB/s, while the i7-3615QE's memory support field is not recorded in the database. The i5-6500T also lists PCIe Gen 3 with 16 lanes (CPU only), whereas the i7-3615QE has no PCIe information listed. Cache layouts are identical: both have 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3 cache. However, the i7-3615QE's base clock of 2.30 GHz and boost clock of 3.30 GHz compare to the i5-6500T's base clock of 2.50 GHz and boost clock of 3.10 GHz.

Head-to-Head Benchmarks

The recorded data shows a clean sweep for the Intel Core i7-3615QE across all six Cinebench tests. The margin is remarkably consistent, hovering around 17.8% to 17.9% in most tests. In Cinebench R15 multicore, the i7-3615QE scores 481 versus the i5-6500T's 408, a 17.9% advantage. The singlecore test shows a similar story: 67 versus 57, a 17.5% edge for the older chip.

Moving to Cinebench R20, the pattern holds. The multicore test yields 2005 for the i7-3615QE against 1702 for the i5-6500T, a 17.8% delta. The singlecore result is 283 versus 240, again 17.9% in favor of the i7-3615QE. Cinebench R23 continues the trend: multicore scores are 4774 versus 4054, and singlecore scores are 674 versus 572, both showing a 17.8% advantage.

The i5-6500T does have additional Geekbench scores in the database, but those are not part of the head-to-head comparison. The consistency of the Cinebench results is notable: regardless of the rendering workload or whether it is single-threaded or multi-threaded, the i7-3615QE maintains roughly the same percentage lead. This suggests the i7's hyper-threading advantage is not the sole reason for its win, as it also wins singlecore tests where thread count should not matter. The higher boost clock of 3.30 GHz versus 3.10 GHz likely contributes to the singlecore victories.

Specification Differences

The two processors differ in several key specification fields. The most significant difference is thread count: the i7-3615QE has 8 threads while the i5-6500T has 4. This is paired with a difference in boost clock, as the i7-3615QE boosts to 3.30 GHz while the i5-6500T boosts to 3.10 GHz. The base clock is actually higher on the i5-6500T at 2.50 GHz, compared to 2.30 GHz on the i7-3615QE.

Power and physical specifications also diverge. The i7-3615QE has a TDP of 45 watts and uses the Intel BGA 1023 socket, while the i5-6500T has a TDP of 35 watts and uses the Intel Socket 1151. The manufacturing process differs: 22 nm for the i7-3615QE versus 14 nm for the i5-6500T. The die size is 160 mm² for the i7-3615QE and 122 mm² for the i5-6500T, with transistor counts only recorded for the i7-3615QE (1,400 million).

Memory and expansion capabilities show differences too. The i5-6500T supports DDR3 and DDR4 memory with a recorded memory bandwidth of 34.1 GB/s, while the i7-3615QE has no memory support or bandwidth data listed. The i5-6500T also has PCIe Gen 3 with 16 lanes (CPU only), a feature not listed for the i7-3615QE. Integrated graphics differ: Intel HD 4000 on the i7-3615QE versus HD Graphics 530 on the i5-6500T. The i5-6500T is marked as end-of-life production status, while the i7-3615QE's status is not recorded. Release dates show the i7-3615QE launched in 2012-04-28, while the i5-6500T launched later on 2015-07-01.

Where Each One Wins

Given the head-to-head data, the Intel Core i7-3615QE wins in every benchmark category recorded. It is the clear choice for multi-threaded rendering workloads, as demonstrated by its 17.9% lead in Cinebench R15 multicore and 17.8% leads in both R20 and R23 multicore tests. Content creators, video editors, or anyone running heavily parallelized applications would see tangible benefits from the i7-3615QE's 8 threads.

The i7-3615QE also wins in singlecore performance, which is more surprising given the newer architecture of the i5-6500T. With leads of 17.5% in R15 singlecore and 17.8-17.9% in R20 and R23 singlecore, the i7-3615QE's higher boost clock appears to compensate fully for the i5-6500T's architectural improvements. This makes the i7-3615QE suitable for tasks that rely on per-core speed, such as older games or lightly threaded applications.

The Intel Core i5-6500T, despite losing all head-to-head tests, still has its own strengths based on the specification data. Its lower TDP of 35 watts versus 45 watts makes it more power-efficient, which is a meaningful attribute for compact desktop builds or systems where thermal output is a concern. Its support for DDR4 memory and PCIe Gen 3 with 16 lanes also positions it as a more modern platform for building a system with current memory and expansion standards, even if the CPU itself is slower in pure compute benchmarks.

The Verdict

The benchmark data is unambiguous: the Intel Core i7-3615QE outperforms the Intel Core i5-6500T in every recorded Cinebench test, with margins consistently around 17.8%. Anyone prioritizing raw compute performance should select the i7-3615QE, especially for multi-threaded workloads where its 8 threads provide a clear structural advantage over the i5-6500T's 4 threads. The i7-3615QE also wins singlecore tests, making it the better choice for mixed workloads.

However, the Intel Core i5-6500T should not be dismissed entirely. Its lower TDP of 35 watts makes it more suitable for power-constrained or low-noise builds where energy consumption is a priority over maximum performance. The i5-6500T also offers modern platform features like DDR4 memory support and PCIe Gen 3 with 16 lanes, which the i7-3615QE does not list. For users building a new desktop system with these features in mind, the i5-6500T provides a contemporary foundation, even though it loses on compute scores. The data suggests a trade-off: the i7-3615QE for maximum benchmark performance, the i5-6500T for a more efficient, modern platform.