Intel Core i7-3632QM vs Intel Xeon E3-1235L v5 Comparison

The Intel Xeon E3-1235L v5 and Intel Core i7-3632QM are two four-core processors from different eras and market segments, yet they land in nearly the same performance bracket. The Xeon E3-1235L v5, a 14 nm Skylake server/workstation part, and the i7-3632QM, a 22 nm Ivy Bridge mobile chip, both hold a 34th percentile ranking among all CPUs. Their average benchmark scores are remarkably close: 1232 for the Xeon versus 1219 for the i7. Benchmark results indicate that the Xeon wins every single head-to-head Cinebench test, but the margins are consistently narrow, ranging from 5.3% to 5.9%. This makes the choice between them less about raw performance and more about platform features, power envelope, and intended workload.

Where Each One Wins

The data paints a clear picture: the Intel Xeon E3-1235L v5 wins in every benchmark category where both processors were tested. Across the six Cinebench tests—R15, R20, and R23 in both single-core and multi-core variants—the Xeon holds a decisive, if modest, edge. The largest advantage comes in Cinebench R20 single-core, where the Xeon scores 252 against the i7's 238, a 5.9% lead. The smallest gap is in R15 single-core, with the Xeon at 60 and the i7 at 57, a 5.3% difference. This consistent win pattern suggests the Xeon's newer Skylake architecture provides a measurable IPC advantage over the older Ivy Bridge design.

The Intel Core i7-3632QM, however, has one area where it is not directly compared but holds a structural advantage: thread count. The i7 features 8 threads thanks to Hyper-Threading, while the Xeon is limited to 4 threads. This means that in workloads not covered by the Cinebench suite—such as heavily threaded productivity tasks that scale beyond four threads—the i7 could potentially close the gap or even pull ahead, despite its lower per-core performance. The benchmark data does not include such tests, so this remains a qualitative observation based on the thread count disparity.

The i7 also benefits from a higher base clock of 2.20 GHz and a boost clock of 3.20 GHz, compared to the Xeon's 2.00 GHz base and 3.00 GHz boost. Yet the Xeon still wins all Cinebench tests, underscoring that architectural efficiency trumps raw clock speed in these workloads. For single-threaded responsiveness, the Xeon is the clear choice; for multi-threaded throughput on a strict power budget, the i7's extra threads could make it competitive, though the measured data does not confirm this.

Architecture Differences

The architectural gap between these two processors is substantial, reflecting their different release timelines and target markets. The Intel Xeon E3-1235L v5 is built on a 14 nm process node, codenamed Skylake-DT, and was released in October 2015. It uses the Intel Socket 1151 platform and is designated for the Server/Workstation market segment. The Intel Core i7-3632QM, in contrast, is fabricated on a 22 nm node, uses the older Ivy Bridge architecture, and was released exactly three years earlier in October 2012. It employs the Intel Socket G2 (988B) and is classified as a Mobile processor.

The transistor counts and die sizes reflect these process differences. The Xeon packs 1,750 million transistors into a 122 mm² die, while the i7 contains 1,480 million transistors on a larger 160 mm² die. This denser integration on the Xeon contributes to its power efficiency. The Xeon has a TDP of just 25 watts, compared to the i7's 35 watts—a 40% lower power envelope for the Xeon, yet it still delivers higher benchmark scores.

Cache configurations also differ. Both processors have 64 KB of L1 cache per core and 256 KB of L2 cache per core. However, the Xeon features 8 MB of shared L3 cache, while the i7 has only 6 MB. This 2 MB difference in L3 cache likely contributes to the Xeon's performance advantage in memory-sensitive workloads. The Xeon also supports both DDR3 and DDR4 memory with a dual-channel bus and a memory bandwidth of 34.1 GB/s, while the i7's memory support and bandwidth are not listed in the data. ECC memory is supported on the Xeon but not on the i7, a key feature for server reliability.

Integrated graphics differ as well: the Xeon includes HD Graphics P530, while the i7 has Intel HD 4000. The Xeon's PCIe configuration is listed as Gen 3 with 16 lanes (CPU only), whereas the i7's PCIe details are not provided. Neither processor has an unlocked multiplier, so overclocking is not an option for either.

Head-to-Head Benchmarks

The head-to-head benchmark results show a uniform pattern of Xeon superiority, with all six Cinebench tests favoring the Intel Xeon E3-1235L v5. In Cinebench R15 multi-core, the Xeon scores 429 against the i7's 406, a 5.7% advantage. The single-core R15 test shows a similar story: 60 versus 57, a 5.3% lead. Moving to Cinebench R20, the Xeon extends its multi-core lead to 1789 versus 1693, again a 5.7% margin, and its single-core lead to 252 versus 238, a 5.9% gap—the largest of any test.

In Cinebench R23, the most demanding test in the suite, the Xeon scores 4261 in multi-core compared to the i7's 4033, maintaining the consistent 5.7% advantage. The single-core R23 result is 601 versus 569, a 5.6% lead. The i7 also has two Geekbench scores listed—2142 multi-core and 613 single-core—but the Xeon has no Geekbench results in the data, so no direct comparison is possible for those tests.

The average benchmark score tells a similar story. The Xeon's average is 1232, while the i7's is 1219. When placed against their nearest rivals, the Xeon is essentially tied with the Intel Core i3-8109U (deltaPct -0.2%) and Pentium Gold G6600 (deltaPct -0.2%), and slightly ahead of the Core i5-2500 (deltaPct 1%). The i7, meanwhile, is nearly identical to the Core i5-2500 (deltaPct -0.1%) and slightly ahead of the Pentium Silver N6005 (deltaPct 0.1%). Both processors sit in the same performance neighborhood, within 1% of each other's closest competitors.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core i7-3632QM has a higher boost clock of 3.20 GHz, compared to the Intel Xeon E3-1235L v5's 3.00 GHz. Despite this clock advantage, the Xeon wins all shared benchmark tests.

Q: Does the Xeon support ECC memory?

A: Yes, the Intel Xeon E3-1235L v5 supports ECC memory, which is a key feature for server and workstation reliability. The Intel Core i7-3632QM does not support ECC memory.

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

A: The Intel Xeon E3-1235L v5 has a TDP of 25 watts, while the Intel Core i7-3632QM has a TDP of 35 watts. The Xeon consumes 40% less power while delivering higher performance in every shared benchmark.

Q: How much L3 cache does each processor have?

A: The Intel Xeon E3-1235L v5 has 8 MB of shared L3 cache, while the Intel Core i7-3632QM has 6 MB of shared L3 cache. This 2 MB difference may contribute to the Xeon's performance edge.

Q: Which processor has more threads?

A: The Intel Core i7-3632QM has 8 threads, while the Intel Xeon E3-1235L v5 has only 4 threads. The i7's Hyper-Threading support gives it a potential advantage in workloads that can utilize more than four threads.

Q: What is the largest benchmark margin between the two?

A: The largest margin is in Cinebench R20 single-core, where the Intel Xeon E3-1235L v5 scores 252 versus the i7's 238, a 5.9% advantage. The smallest margin is in Cinebench R15 single-core, at 5.3%.

The Verdict

The benchmark data is unambiguous: the Intel Xeon E3-1235L v5 is the faster processor in every test where both were measured. It wins all six Cinebench benchmarks with margins between 5.3% and 5.9%, and it does so while consuming 10 watts less power (25W versus 35W). The Xeon's 8 MB of L3 cache, 14 nm process, and newer Skylake architecture give it a clear performance-per-watt advantage over the older Ivy Bridge i7. For anyone building a system where the Xeon's Socket 1151 platform is viable, and where ECC memory support matters, the Xeon is the superior choice.

However, the Intel Core i7-3632QM retains relevance in one specific scenario: workloads that can leverage its 8 threads. The Xeon's 4 threads might bottleneck in heavily parallel tasks that the Cinebench suite does not capture. The i7's higher base and boost clocks (2.20 GHz and 3.20 GHz versus 2.00 GHz and 3.00 GHz) also suggest it could feel snappier in lightly threaded, clock-sensitive applications, though the measured single-core scores contradict this expectation. The i7's mobile socket (Socket G2) also means it targets laptops and compact systems, while the Xeon is a server/workstation part for Socket 1151 desktops.

In summary, the Xeon wins on raw performance, power efficiency, cache size, memory flexibility (DDR3 and DDR4), and ECC support. The i7 wins on thread count and higher clock speeds, but those advantages do not translate into benchmark victories in the data provided. The choice depends on platform requirements: if you need ECC and lower power, take the Xeon; if you have a mobile platform and can utilize extra threads, the i7 remains a viable option, but it will trail the Xeon in every measured benchmark. Both processors sit at the 34th percentile overall, making them comparable mid-range parts, but the Xeon is the stronger performer of the two.