Intel Core i7-3540M vs Intel Xeon X5550 Comparison

The Verdict

The recorded data paints a surprisingly close picture between these two Intel processors, despite their vastly different origins. The Intel Core i7-3540M, a 2013 mobile chip, and the Intel Xeon X5550, a 2009 server/workstation part, land within 2.2% of each other across every head-to-head benchmark in the database. The Xeon X5550 wins all five recorded tests, but its margins are razor-thin, ranging from 1.9% to 2.2%. For a user deciding between these two, the choice hinges less on raw performance and more on platform characteristics: the i7-3540M offers a modern 22 nm process, integrated graphics, and a low 35 W TDP, while the X5550 brings four physical cores, eight threads, ECC memory support, and a triple-channel memory bus. The data suggests the Xeon is marginally faster in every measured workload, but the Core i7 is not far behind, making the decision a matter of socket compatibility and feature requirements rather than benchmark dominance.

Architecture Differences

The architectural gap between these two processors is substantial. The Intel Core i7-3540M is built on the Ivy Bridge architecture using a 22 nm process node, with a die size of 118 mm². The Intel Xeon X5550 uses the older Nehalem architecture, specifically the Gainestown codename, fabricated on a 45 nm process with a much larger 263 mm² die and 731 million transistors. This generational leap explains why a dual-core mobile part can keep pace with a quad-core server chip: the newer process node allows for higher efficiency and better per-clock performance.

The core configurations differ sharply. The i7-3540M has 2 cores and 4 threads, while the X5550 doubles that with 4 cores and 8 threads. Cache layouts also diverge: both share 64 KB L1 and 256 KB L2 per core, but the L3 cache is 4 MB shared on the i7-3540M versus 8 MB shared on the X5550. Memory support differs as well: both accept DDR3, but the i7-3540M uses a dual-channel memory bus, while the X5550 employs a triple-channel configuration. The X5550 also supports ECC memory, a feature absent from the i7-3540M. Integrated graphics are present on the mobile chip (Intel HD 4000) but absent on the Xeon. The X5550 includes PCIe Gen 2 support, while the database lists no PCIe specification for the i7-3540M. Clock speeds favor the newer part: the i7-3540M runs at 3.00 GHz base and 3.70 GHz boost, versus 2.67 GHz base and 3.07 GHz boost for the X5550. The TDP difference is stark: 35 W for the mobile chip versus 95 W for the server chip. The i7-3540M targets the mobile segment with an Intel Socket G2 (988B), while the X5550 is a server/workstation part on Intel Socket 1366 and is marked as end-of-life.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon X5550 has 4 cores and 8 threads, while the Intel Core i7-3540M has only 2 cores and 4 threads.

Q: Does the Core i7-3540M have integrated graphics?

A: Yes, the i7-3540M includes Intel HD 4000 integrated graphics. The Xeon X5550 has no integrated graphics listed in the database.

Q: Which chip supports ECC memory?

A: The Intel Xeon X5550 supports ECC memory. The Core i7-3540M does not list ECC support.

Q: How much L3 cache does each processor have?

A: The Core i7-3540M has 4 MB shared L3 cache, while the Xeon X5550 has 8 MB shared L3 cache.

Q: What is the release date difference?

A: The Xeon X5550 was released on 2009-03-29, while the Core i7-3540M was released on 2013-01-07, a gap of roughly four years.

Q: Which processor has a higher boost clock?

A: The Core i7-3540M has a 3.70 GHz boost clock, significantly higher than the Xeon X5550's 3.07 GHz boost clock.

Specification Differences

The two processors differ across nearly every specification field in the database. The Core i7-3540M offers 2 cores and 4 threads, while the Xeon X5550 provides 4 cores and 8 threads. Base clocks are 3.00 GHz for the i7-3540M and 2.67 GHz for the X5550; boost clocks are 3.70 GHz versus 3.07 GHz. TDP is a major differentiator: 35 W for the mobile chip versus 95 W for the server chip. The process node is 22 nm for the i7-3540M and 45 nm for the X5550, with die sizes of 118 mm² and 263 mm² respectively. The X5550 lists 731 million transistors, while the i7-3540M has no transistor count recorded. L3 cache is 4 MB shared on the i7-3540M versus 8 MB shared on the X5550. Memory bus width differs: dual-channel for the i7-3540M, triple-channel for the X5550. ECC memory support is true on the X5550 and false on the i7-3540M. The i7-3540M has integrated graphics (Intel HD 4000); the X5550 has none. Socket types are entirely different: Intel Socket G2 (988B) for the mobile part, Intel Socket 1366 for the server part. The market segments are Mobile versus Server/Workstation. The X5550 is marked end-of-life, while the i7-3540M has no production status listed. Release dates are 2013-01-07 for the i7-3540M and 2009-03-29 for the X5550. Part numbers are SR0X6 for the i7-3540M and SLBF5 for the X5550. Both processors have locked multipliers.

Head-to-Head Benchmarks

The head-to-head data shows a consistent, if narrow, victory for the Intel Xeon X5550 across all five benchmark tests. In Cinebench R15 multi-core, the X5550 scores 259 against 254 for the i7-3540M, a 1.9% difference. Cinebench R20 multi-core shows 1083 versus 1060, a 2.1% gap. The single-core tests follow the same pattern: Cinebench R20 single-core gives 152 for the X5550 and 149 for the i7-3540M, a 2% margin, while Cinebench R23 single-core yields 364 versus 356, a 2.2% difference. Cinebench R23 multi-core rounds out the set with 2580 against 2525, another 2.1% margin. The Xeon wins all five tests, but the largest delta is just 2.2%, meaning the i7-3540M is never more than a small percentage behind.

Looking at the broader benchmark context, the two chips occupy similar positions in the overall database. The i7-3540M has an average benchmark score of 867 with a percentile rank of 23, while the X5550 averages 888 with a percentile of 24. The nearest rivals for the i7-3540M include the Intel Xeon X3460 at 866 (0.1% higher), the Intel Core i5-3470T at 863 (0.4% higher), the Intel Atom C5315 at 871 (0.5% lower), and the AMD Athlon PRO 3045B at 872 (0.6% lower). The X5550's nearest rivals include the Intel Core i3-6100 at 888 (0% difference), the Intel Pentium G4560T at 887 (0.1% lower), the AMD PRO A8-8650B at 887 (0.2% lower), and the Intel Core i7-860 at 886 (0.2% lower). These rival comparisons reinforce the finding that both chips sit in the same performance tier, with the X5550 holding a slight edge.

Where Each One Wins

The Intel Xeon X5550 wins every recorded benchmark, making it the clear performance leader in the database, albeit by a slim margin. Its advantages are most visible in multi-threaded workloads where its 4 cores and 8 threads should logically outperform the 2-core, 4-thread i7-3540M. Yet the data shows the X5550 only manages a 1.9% to 2.1% lead in multi-core tests, suggesting the i7-3540M's higher clock speeds and newer architecture compensate for its core deficit. The X5550 also wins single-core tests by 2% to 2.2%, which is notable because the i7-3540M has a 0.63 GHz higher boost clock. This indicates the older Nehalem architecture still delivers competitive single-thread performance despite its age.

The Core i7-3540M wins in areas not captured by the benchmark scores. Its 35 W TDP versus 95 W makes it far more suitable for compact or mobile systems where power consumption and heat dissipation matter. The integrated Intel HD 4000 graphics eliminate the need for a separate GPU in basic display tasks, a feature the X5550 lacks entirely. The newer 22 nm process and smaller 118 mm² die suggest better manufacturing efficiency. The i7-3540M also uses a dual-channel memory bus, which is simpler and lower-power than the X5550's triple-channel setup, though the latter offers potentially higher memory bandwidth for server workloads.

For use cases, the data points to the X5550 for anyone building or upgrading a system on Intel Socket 1366 who needs ECC memory support and eight threads for parallel processing. The i7-3540M suits mobile platforms or compact builds on Intel Socket G2 where integrated graphics and low power draw are priorities. The X5550's end-of-life status and server market segment suggest it belongs in legacy workstation deployments, while the i7-3540M's 2013 release and mobile positioning make it a candidate for older laptop upgrades. Given that the X5550 leads by only around 2% in every test, neither chip offers a compelling raw performance advantage; the decision should rest on platform compatibility, power requirements, and the need for ECC or integrated graphics.