Intel Core i7-2960XM vs Intel Core i7-3635QM Comparison

The benchmark data shows two mobile quad-core processors from Intel that are remarkably close in overall performance, yet they achieve their results through very different architectures and design philosophies. The Intel Core i7-3635QM, based on the newer 22nm Ivy Bridge process, wins six of the eight head-to-head comparisons, while the older Intel Core i7-2960XM, a 32nm Sandy Bridge Extreme part with a higher clock speed and larger cache, counters with two decisive wins in the Geekbench suite. The average benchmark scores are nearly identical at 1170 and 1169, respectively, placing both in the 33rd percentile of all CPUs.

The Verdict

The data presents a clear split decision. The Intel Core i7-3635QM is the superior choice for sustained multi-threaded rendering workloads, as it edges out its rival in every Cinebench test, from the R15 multicore score of 408 against 401 (a 1.7% lead) to the R23 multicore score of 4057 against 3988 (also a 1.7% lead). Its consistent single-core Cinebench wins, such as 572 versus 563 in R23, also indicate a slight architectural efficiency advantage in that specific rendering engine.

However, the Intel Core i7-2960XM is the pick for general system responsiveness and legacy software, as shown by its commanding Geekbench victories. It scores 1851 versus 1790 in Geekbench multicore (a 3.3% lead) and 581 versus 532 in single-core (a massive 8.4% lead). The 2960XM also appeals to users who require an unlocked multiplier for overclocking, a feature the 3635QM lacks. The 3635QM is the more efficient and modern option, with a 45W TDP versus the 55W TDP of the 2960XM, and it integrates the newer Intel HD 4000 graphics. For users prioritizing the latest rendering benchmarks and lower power draw, choose the 3635QM. For those who value the legacy Geekbench performance and overclocking capability, the 2960XM is the data-supported pick, despite its older architecture.

Architecture Differences

The two processors represent distinct generations of Intel's mobile lineup. The i7-3635QM is built on the 22nm process node, while the i7-2960XM uses the older 32nm node. This difference is reflected in the transistor counts: the 3635QM packs 1,480 million transistors into a 160 mm² die, whereas the 2960XM has 1,160 million transistors on a larger 216 mm² die. The newer process allows the 3635QM to achieve its performance with a lower 45W TDP, compared to the 55W TDP of the 2960XM.

The cache hierarchies also differ. While both have 64 KB of L1 and 256 KB of L2 cache per core, the 2960XM boasts a larger 8 MB shared L3 cache, compared to the 6 MB shared L3 cache on the 3635QM. The 2960XM is part of the Core i7 Extreme family with a Sandy Bridge architecture, whereas the 3635QM is a standard Core i7 with the Ivy Bridge architecture. Furthermore, the 2960XM features an unlocked multiplier, allowing for overclocking, a capability not present on the locked 3635QM. The 2960XM also lists support for DDR3 memory and a memory bandwidth of 25.6 GB/s, while the 3635QM's memory support is not specified in the data. The integrated graphics differ as well, with the 3635QM featuring Intel HD 4000 and the 2960XM featuring the older Intel HD 3000.

FAQ

Q: Which processor has a higher base clock speed?

A: The Intel Core i7-2960XM has a base clock of 2.70 GHz, which is higher than the 2.40 GHz base clock of the Intel Core i7-3635QM.

Q: What is the difference in their average benchmark scores?

A: The difference is minimal. The Intel Core i7-3635QM has an average benchmark score of 1170, while the Intel Core i7-2960XM has an average score of 1169, a delta of just 0.1%.

Q: Does the Intel Core i7-2960XM support overclocking?

A: Yes, the multiplier is unlocked on the Intel Core i7-2960XM, which permits overclocking. The multiplier on the Intel Core i7-3635QM is not unlocked.

Q: Which CPU has a larger L3 cache?

A: The Intel Core i7-2960XM has a larger 8 MB (shared) L3 cache, compared to the 6 MB (shared) L3 cache found on the Intel Core i7-3635QM.

Q: In which benchmark does the Intel Core i7-2960XM have its biggest win?

A: The largest victory for the i7-2960XM is in the Geekbench single-core test, where it scores 581 versus the 532 of the i7-3635QM, representing an 8.4% advantage.

Q: What is the launch MSRP of the Intel Core i7-2960XM?

A: The launch MSRP of the Intel Core i7-2960XM is $1096.

Specification Differences

The following specifications differ between the two processors:

• Base Clock: 2.40 GHz (i7-3635QM) vs 2.70 GHz (i7-2960XM)
• Boost Clock: 3.40 GHz (i7-3635QM) vs 3.70 GHz (i7-2960XM)
• TDP: 45W (i7-3635QM) vs 55W (i7-2960XM)
• Socket: Intel BGA 1224 (i7-3635QM) vs Intel Socket G2 (988B) (i7-2960XM)
• Architecture: Ivy Bridge (i7-3635QM) vs Sandy Bridge (i7-2960XM)
• Process Node: 22 nm (i7-3635QM) vs 32 nm (i7-2960XM)
• Transistors: 1,480 million (i7-3635QM) vs 1,160 million (i7-2960XM)
• Die Size: 160 mm² (i7-3635QM) vs 216 mm² (i7-2960XM)
• L3 Cache: 6 MB (shared) (i7-3635QM) vs 8 MB (shared) (i7-2960XM)
• Integrated Graphics: Intel HD 4000 (i7-3635QM) vs Intel HD 3000 (i7-2960XM)
• Multiplier Unlocked: No (i7-3635QM) vs Yes (i7-2960XM)
• Memory Bandwidth: Not specified (i7-3635QM) vs 25.6 GB/s (i7-2960XM)
• PCIe: Not specified (i7-3635QM) vs Gen 2, 16 Lanes (CPU only) (i7-2960XM)
• Production Status: Not specified (i7-3635QM) vs End-of-life (i7-2960XM)
• Release Date: 2012-08-31 (i7-3635QM) vs 2011-09-03 (i7-2960XM)

Head-to-Head Benchmarks

The head-to-head results paint a nuanced picture. The i7-3635QM is the victor in all six Cinebench tests, demonstrating a consistent, if modest, advantage. In Cinebench R15 multicore, it scores 408 against 401, a 1.7% lead. This pattern repeats in R20 multicore with a score of 1703 versus 1674 (1.7%) and in R23 multicore with 4057 versus 3988 (1.7%). The single-core Cinebench tests show the same trend, with the 3635QM winning R15 by 1.8% (57 to 56), R20 by 1.7% (240 to 236), and R23 by 1.6% (572 to 563). This suggests that the newer Ivy Bridge architecture is slightly more efficient at executing the Cinebench workload, despite the 2960XM having higher clock speeds and more L3 cache.

The story flips entirely in the Geekbench suite. Here, the i7-2960XM takes a decisive lead. In Geekbench multicore, it scores 1851 versus 1790, a 3.3% advantage for the older chip. The single-core Geekbench test is even more lopsided, with the 2960XM winning 581 to 532, an 8.4% margin. This is a significant swing. The data indicates that the 2960XM's higher clock speeds and larger cache are more beneficial in this particular benchmark, or that the Geekbench test is less optimized for the Ivy Bridge architecture. The result is a split: the 3635QM wins 6 benchmarks, while the 2960XM wins 2.

Where Each One Wins

The Intel Core i7-3635QM wins in: all Cinebench rendering benchmarks, including R15, R20, and R23, in both single-core and multi-core tests. It is the faster chip for these specific rendering workloads, with margins consistently around 1.7%. It also holds advantages in power efficiency, with a 45W TDP compared to 55W, and features a more modern integrated graphics solution with the Intel HD 4000. The 3635QM is the logical choice for users whose primary applications are similar to the Cinebench rendering engine.

The Intel Core i7-2960XM wins in: both Geekbench tests, particularly the single-core test where it leads by a substantial 8.4%. It also offers a larger 8MB L3 cache, higher base and boost clocks (2.70 GHz and 3.70 GHz), and an unlocked multiplier for overclocking enthusiasts. It is the better choice for users who prioritize the types of workloads reflected in Geekbench scores, such as general system responsiveness and legacy application performance, and who value the ability to push the chip beyond its stock settings.