Intel Core i7-3632QM vs Intel Xeon D-1520 Comparison

The Verdict

The benchmark data is unambiguous: the Intel Xeon D-1520 wins every single head-to-head test against the Intel Core i7-3632QM, taking all six Cinebench comparisons. The Xeon’s lead is consistent and narrow, ranging from 3.4% to 3.6% across both single-core and multi-core workloads. If you are choosing strictly on performance, the Xeon D-1520 is the pick, though the margin is small enough that other platform factors will likely decide the real-world choice.

The Core i7-3632QM is the mobile part here, built for laptops with a 35W TDP and integrated graphics. The Xeon D-1520 is a server/embedded processor with a 45W TDP, ECC memory support, and no integrated graphics. The data suggests the Xeon is the stronger compute engine, but the i7-3632QM carries its own advantages for portable systems. The Xeon D-1520 is for anyone building a low-power server or workstation who needs ECC and can live without integrated graphics. The i7-3632QM is for a mobile system where the 35W TDP and Intel HD 4000 matter more than a few percentage points of Cinebench score.

Both parts sit at the 34th percentile of all CPUs, and their average benchmark scores are nearly identical: 1219 for the i7-3632QM versus 1209 for the Xeon D-1520. The Xeon’s win in the head-to-head is real but modest, so the decision comes down to platform fit rather than raw dominance.

Architecture Differences

The two processors come from different architectural generations and serve different market segments. The Core i7-3632QM is an Ivy Bridge mobile chip, fabricated on Intel’s 22 nm process with 1,480 million transistors on a 160 mm² die. The Xeon D-1520 is a Broadwell part for servers and workstations, built on the 14 nm node with 3,200 million transistors and a larger 246 mm² die. The process shrink gives the Xeon a denser, more modern design, which helps explain its slightly higher performance despite a higher TDP.

Both chips have 4 cores and 8 threads, and both run at a 2.20 GHz base clock. The Core i7-3632QM boosts to 3.20 GHz, while the Xeon D-1520 tops out at 2.60 GHz. The i7’s higher boost clock does not translate into benchmark wins, suggesting the Xeon’s architectural efficiency compensates for the lower frequency.

Cache layouts differ meaningfully. The i7-3632QM has 6 MB of shared L3 cache, while the Xeon D-1520 provides 1.5 MB of L3 per core, totaling 6 MB as well, but organized per-core rather than shared. Both share the same per-core L1 and L2 cache sizes at 64 KB and 256 KB respectively. The Xeon adds ECC memory support and a memory list that includes both DDR3 and DDR4, whereas the i7-3632QM has no ECC support and no explicit memory support field in the data. The Xeon also exposes 24 PCIe Gen 3 lanes from the CPU, while the i7’s PCIe configuration is not listed.

The i7-3632QM includes Intel HD 4000 integrated graphics; the Xeon D-1520 has none. The Xeon is marked as Active in production status, while the i7 has no production status listed. The Xeon has a launch MSRP of $199; the i7 has no listed launch price.

FAQ

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

A: The Xeon D-1520 wins all three multi-core Cinebench tests. It scores 421 versus 406 in R15, 1755 versus 1693 in R20, and 4179 versus 4033 in R23. The margin is 3.5% to 3.6% in each case.

Q: Does the Core i7-3632QM win any benchmark?

A: No. The head-to-head data shows the Xeon D-1520 winning all six tests, with the i7-3632QM recording zero wins.

Q: Can the Xeon D-1520 use ECC memory?

A: Yes, the Xeon D-1520 supports ECC memory and lists DDR3 and DDR4 as supported memory types. The Core i7-3632QM does not support ECC.

Q: Which processor has integrated graphics?

A: Only the Core i7-3632QM has integrated graphics, specifically Intel HD 4000. The Xeon D-1520 has no integrated graphics listed.

Q: How do their average benchmark scores compare?

A: The Core i7-3632QM has an average benchmark score of 1219, while the Xeon D-1520 scores 1209. The i7-3632QM is 0.1% ahead of the Intel Core i5-2500, and the Xeon D-1520 is exactly even with the Intel Core i3-8121U.

Q: Are the clock speeds different?

A: Both run at a 2.20 GHz base clock. The Core i7-3632QM boosts to 3.20 GHz, while the Xeon D-1520 boosts to 2.60 GHz.

Specification Differences

The two processors differ in several key specification fields. The Core i7-3632QM uses the Intel Socket G2 (988B), while the Xeon D-1520 uses Intel BGA 1667. The i7 is from the Ivy Bridge architecture and the Core i7 generation, while the Xeon is Broadwell and part of the Xeon D (Broadwell-DE) generation. The process node is 22 nm for the i7 and 14 nm for the Xeon. Transistor count jumps from 1,480 million on the i7 to 3,200 million on the Xeon, and die size grows from 160 mm² to 246 mm².

L3 cache is organized differently: the i7 has 6 MB shared, the Xeon has 1.5 MB per core. Memory support is only listed for the Xeon, which accepts DDR3 and DDR4. ECC memory is supported on the Xeon only. PCIe is listed only for the Xeon, with Gen 3 and 24 lanes from the CPU. The i7 has Intel HD 4000 integrated graphics; the Xeon has none. Market segment is Mobile for the i7 and Server/Workstation for the Xeon. The Xeon has a production status of Active and a part number SR29B. The Xeon has a launch MSRP of $199; the i7 has none listed. Release dates are 2012-10-18 for the i7 and 2015-03-08 for the Xeon.

Head-to-Head Benchmarks

The Xeon D-1520 sweeps the entire Cinebench suite. In R15 multi-core, the Xeon scores 421 against the i7-3632QM’s 406, a 3.6% advantage. Single-core R15 is closer: 59 versus 57, a 3.4% lead. The R20 multi-core test shows 1755 versus 1693, again a 3.5% gap, and R20 single-core is 247 versus 238, a 3.6% difference. The R23 results follow the same pattern: 4179 versus 4033 in multi-core (3.5%) and 590 versus 569 in single-core (3.6%).

The consistency is notable. Every single test, whether single-threaded or multi-threaded, lands within a 3.4% to 3.6% range. That suggests the Xeon’s advantage is not workload-specific but a general architectural edge. The i7-3632QM’s higher boost clock of 3.20 GHz versus 2.60 GHz is not enough to overcome the Xeon’s newer 14 nm design.

Looking at the broader benchmark context, the i7-3632QM also has Geekbench scores of 2142 multi-core and 613 single-core, which are not part of the head-to-head comparison but add color to its profile. The Xeon D-1520 has no Geekbench scores listed.

Where Each One Wins

The Xeon D-1520 wins everywhere in the benchmark data, so the use-case split is about platform features rather than performance categories. The Xeon is the choice for a server or workstation build where ECC memory is required and the system will run 24/7. Its 45W TDP is higher than the i7-3632QM’s 35W, but for a stationary system that is less of a concern. The Xeon’s support for DDR3 and DDR4 gives memory flexibility, and its 24 PCIe Gen 3 lanes provide room for expansion cards. The lack of integrated graphics is a non-issue in a system with a discrete GPU.

The Core i7-3632QM is the mobile pick. Its 35W TDP is lower, which matters for laptop cooling and battery life. The integrated Intel HD 4000 means the CPU can drive a display without a separate graphics card. The i7’s higher boost clock of 3.20 GHz does not produce benchmark wins, but in light, short-burst tasks the extra frequency headroom could feel responsive even if Cinebench does not reflect it. The i7-3632QM is also the older part, released in 2012 versus the Xeon’s 2015 debut, so it is likely found in existing laptops rather than new builds.

For a pure compute comparison, the Xeon D-1520 is the stronger chip by a small but consistent margin. For a mobile system, the i7-3632QM has the features that matter: lower power draw, integrated graphics, and a socket designed for laptops. The data does not suggest the i7 is a better performer, but it does suggest the i7 is a better fit for portable machines where the Xeon’s server-oriented feature set is irrelevant.