Intel Core i7-5550U vs Intel Xeon E5530 Comparison

Head-to-Head Benchmarks

The benchmark data presents a remarkably consistent picture: the Intel Core i7-5550U wins every single recorded head-to-head test, yet the margins are razor-thin. Across five Cinebench workloads, the mobile Broadwell part edges out the older server-class Xeon E5530 by margins between 1.5% and 1.7%. The largest gap appears in Cinebench R15 multicore, where the i7-5550U scores 238 against 234 for the Xeon, a 1.7% advantage. Every other test, from R20 multicore (992 vs 977) to R23 single-core (333 vs 328), shows the same pattern: a 1.5% lead for the i7-5550U.

What makes these results striking is the hardware behind them. The i7-5550U accomplishes these wins with only 2 cores and 4 threads, while the Xeon E5530 fields 4 cores and 8 threads. The Xeon's multicore disadvantage is not a collapse, it is a narrow loss. In R15 multicore, the Xeon trails by just 4 points. In R23 multicore, the gap is 35 points. These are not generational stomps; they are the product of architectural efficiency overcoming a raw core-count deficit.

The single-core tests tell a similar story. The i7-5550U posts 139 in R20 single-core and 333 in R23 single-core, versus 137 and 328 for the Xeon. The 1.5% delta in both cases suggests that the newer Broadwell microarchitecture delivers a modest but consistent per-thread advantage over the older Nehalem design. The data does not show a dramatic leap forward, rather a steady, incremental improvement across every measured workload.

The average benchmark scores in the database echo this closeness. The i7-5550U holds an average score of 813, while the Xeon E5530 averages 801. The i7-5550U sits at the 22nd percentile of all CPUs, the Xeon at the 21st. Both processors occupy nearly the same performance tier, despite being separated by roughly six years in release timing and targeting entirely different market segments.

Architecture Differences

The architectural gap between these two chips is substantial, even if the benchmark scores are not. The i7-5550U is built on the Broadwell architecture, specifically Broadwell-U, using a 14 nm process node. The Xeon E5530 uses the older Nehalem architecture, codenamed Gainestown, on a 45 nm process. This process shrink is significant: the i7-5550U packs 1,900 million transistors into a 133 mm² die, while the Xeon E5530 fits 731 million transistors into a much larger 263 mm² die. The newer node allows the mobile chip to deliver comparable performance at a fraction of the power envelope.

Power consumption is where the architectures diverge most sharply. The i7-5550U carries a TDP of 15 watts, while the Xeon E5530 draws 80 watts. The mobile chip achieves its benchmark parity while consuming less than one-fifth the power of the server part. This efficiency comes from the newer process node, the lower clock speeds, and the fundamentally different design goals: the i7-5550U is a mobile part built for battery life, the Xeon E5530 is a server/workstation chip built for sustained throughput.

Cache hierarchies also tell different stories. Both chips share the same L1 (64 KB per core) and L2 (256 KB per core) configurations, but the L3 cache differs: the i7-5550U has 4 MB shared, while the Xeon E5530 doubles that to 8 MB shared. The larger cache on the Xeon likely helps it compensate for the older architecture, though the data shows it is not enough to overcome the i7-5550U's per-core efficiency.

Memory subsystems differ as well. The i7-5550U supports dual-channel DDR3 with a memory bandwidth of 29.9 GB/s. The Xeon E5530 uses triple-channel DDR3, but its measured bandwidth is lower at 25.6 GB/s. The i7-5550U also includes integrated graphics (Intel HD 6000), while the Xeon has no integrated GPU at all, reflecting its server-oriented design where a discrete graphics solution is expected.

PCIe support also varies. The i7-5550U provides Gen 2 with 12 lanes (CPU only), while the Xeon E5530 lists simply Gen 2 without a lane count in the database. The Xeon supports ECC memory, the i7-5550U does not. This is a critical differentiator for reliability-focused workloads.

Where Each One Wins

The benchmark data shows the i7-5550U winning all five recorded tests, but the real-world implications require more nuance. The i7-5550U wins in every Cinebench workload, which suggests it has a slight edge in both single-threaded and multi-threaded rendering tasks. The margins are small enough, 1.5% to 1.7%, that they would be imperceptible in daily use, but they are consistent across all measured scenarios.

The i7-5550U's advantages extend beyond raw compute. Its 15 watt TDP makes it suitable for thin-and-light laptops, where the Xeon's 80 watt TDP would be impractical. The integrated Intel HD 6000 graphics mean the i7-5550U can handle display output without a discrete GPU, something the Xeon cannot do at all. For mobile workloads, the i7-5550U is clearly the appropriate choice.

The Xeon E5530 wins in areas not captured by the Cinebench suite. Its 4 cores and 8 threads provide more parallel throughput capacity, even if the measured benchmarks show it slightly behind. The 8 MB L3 cache and triple-channel memory support suggest it was designed for server workloads with larger working sets. The ECC memory support is a decisive advantage for applications requiring data integrity, such as financial calculations or scientific computing. The Xeon's socket 1366 platform also supports multiple CPU configurations in a way that the i7-5550U's BGA 1168 socket cannot, though the database does not record specific multi-socket benchmarks.

The production status for both is end-of-life, so neither is a current purchase recommendation. But for legacy systems, the choice depends on the use case: the i7-5550U for mobile efficiency and integrated graphics, the Xeon for server reliability and ECC support.

Specification Differences

The two processors differ across nearly every fundamental specification, reflecting their divergent design targets.

Cores and threads: The i7-5550U has 2 cores and 4 threads. The Xeon E5530 has 4 cores and 8 threads.

Clock speeds: The i7-5550U runs at a base of 2000 MHz and boosts to 3.0 GHz. The Xeon E5530 runs at 2400 MHz base and boosts to 2.67 GHz.

TDP: The i7-5550U consumes 15 watts. The Xeon E5530 consumes 80 watts.

Socket: The i7-5550U uses Intel BGA 1168. The Xeon E5530 uses Intel Socket 1366.

Process node: The i7-5550U is built on 14 nm. The Xeon E5530 uses 45 nm.

Transistors and die size: The i7-5550U has 1,900 million transistors on a 133 mm² die. The Xeon E5530 has 731 million transistors on a 263 mm² die.

L3 cache: The i7-5550U has 4 MB shared. The Xeon E5530 has 8 MB shared.

Memory: Both support DDR3, but the i7-5550U uses dual-channel with 29.9 GB/s bandwidth. The Xeon E5530 uses triple-channel with 25.6 GB/s bandwidth.

ECC: The i7-5550U does not support ECC memory. The Xeon E5530 does.

Integrated graphics: The i7-5550U includes Intel HD 6000. The Xeon E5530 has none.

Market segment: The i7-5550U targets mobile. The Xeon E5530 targets server/workstation.

Release dates: The i7-5550U was released on 2015-02-28. The Xeon E5530 was released on 2009-03-29.

Part numbers: The i7-5550U is SR26A. The Xeon E5530 is SLBF7.

Both processors have locked multipliers and are end-of-life. The i7-5550U has a launch MSRP of $426. The Xeon E5530 has a launch MSRP of $530.

FAQ

Q: Which processor has more cores?

A: The Xeon E5530 has 4 cores and 8 threads, while the i7-5550U has 2 cores and 4 threads.

Q: Which processor wins the benchmark suite?

A: The i7-5550U wins all five recorded Cinebench tests. The margins range from 1.5% to 1.7% across R15, R20, and R23 workloads.

Q: Can the Xeon E5530 use ECC memory?

A: Yes, the Xeon E5530 supports ECC memory. The i7-5550U does not support ECC.

Q: Which processor has integrated graphics?

A: The i7-5550U includes Intel HD 6000 graphics. The Xeon E5530 has no integrated graphics.

Q: What is the TDP difference?

A: The i7-5550U has a TDP of 15 watts. The Xeon E5530 has a TDP of 80 watts.

Q: Which processor has more L3 cache?

A: The Xeon E5530 has 8 MB shared L3 cache. The i7-5550U has 4 MB shared L3 cache.

Q: Are both processors still in production?

A: No, both are marked as end-of-life in the database.

The Verdict

The data presents a clear if narrow winner: the Intel Core i7-5550U outperforms the Intel Xeon E5530 in every recorded benchmark, with margins of 1.5% to 1.7%. The i7-5550U achieves this with half the cores, a third of the L3 cache, and a TDP that is 65 watts lower. This confirms the efficiency gains from the 14 nm Broadwell architecture versus the 45 nm Nehalem design.

For mobile users, the i7-5550U is the obvious choice. Its integrated graphics, low power draw, and dual-channel memory are tailored to laptops. The benchmark wins, however small, reinforce this recommendation.

For server or workstation users, the Xeon E5530 retains specific advantages that the benchmark data does not capture. ECC memory support is essential for data integrity in critical workloads. The triple-channel memory bus and larger L3 cache may benefit certain server applications, even if Cinebench does not show it. The 4 cores and 8 threads provide more parallel capacity for heavily threaded server tasks, even if the measured tests show it slightly behind.

The 22nd and 21st percentile rankings for the i7-5550U and Xeon E5530, respectively, show both are low-to-mid performers by modern standards. Neither is a compelling current purchase, but for legacy platforms, the choice comes down to use case: the i7-5550U for mobile efficiency and general-purpose computing, the Xeon E5530 for server reliability and ECC requirements. The benchmark data says the i7-5550U is faster. The specification data says the Xeon serves a different purpose. Both statements are true.