CPU Comparison

The Intel Core i5-3550S and the Intel Xeon E5630 are both quad-core processors from Intel, but they target very different segments: the former is a desktop Ivy Bridge chip, while the latter is a server/workstation Westmere-EP part. Despite the Xeon’s additional threads and larger cache, the benchmark data shows a decisive performance advantage for the i5-3550S across every tested workload. Both processors sit at the 31st percentile of all CPUs, and their average benchmark scores are nearly identical (1118 for the i5, 1110 for the Xeon), but the head-to-head results reveal a consistent pattern of dominance.

Head-to-Head Benchmarks

The Intel Core i5-3550S wins all five head-to-head benchmark comparisons against the Intel Xeon E5630. The largest margin comes in the Cinebench R15 multicore test, where the i5-3550S scores 383 against the Xeon’s 324, a delta of 18.2 percent. This is mirrored in the Cinebench R20 multicore test, with the i5-3550S posting 1599 versus 1354, an 18.1 percent advantage. The single-core results tell a similar story: in Cinebench R20 single-core, the i5-3550S achieves 225 versus 191, a 17.8 percent lead. The Cinebench R23 tests show an identical 18 percent delta in both multicore and single-core, with the i5-3550S scoring 3808 and 537 respectively, against the Xeon’s 3226 and 455.

These margins are substantial, especially considering the Xeon’s specification advantage in thread count. The Xeon E5630 supports 8 threads via Hyper-Threading, while the i5-3550S is limited to 4 threads. Yet the i5-3550S still manages to beat the Xeon by roughly 18 percent in every multicore benchmark. This indicates that the i5-3550S’s higher clock speeds and newer architecture more than compensate for the Xeon’s additional logical processors. The single-core deltas are particularly telling; the i5-3550S’s 3.70 GHz boost clock versus the Xeon’s 2.80 GHz boost clock translates directly into a 17.8 to 18 percent advantage, showing that per-core performance is the decisive factor.

The consistency of the 18 percent margin across all five tests is remarkable. It suggests that the performance gap is not workload-specific but rather a fundamental architectural and clock-speed difference. The Xeon E5630, despite its server pedigree and 12 MB of shared L3 cache, cannot overcome the i5-3550S’s superior IPC and clock frequency. For users looking at raw compute throughput in Cinebench, the i5-3550S is the clear winner, and the data shows no scenario in these benchmarks where the Xeon pulls ahead.

Where Each One Wins

Given that the Intel Core i5-3550S wins 5 out of 5 head-to-head benchmarks, the use-case split is heavily skewed toward the i5. The i5-3550S wins in all Cinebench R15, R20, and R23 tests, covering both single-core and multicore workloads. This makes it the better choice for any application that relies on CPU rendering, 3D modeling, or video encoding, where Cinebench scores are a reliable proxy. Its 3.70 GHz boost clock and 3.00 GHz base clock provide a significant frequency advantage over the Xeon’s 2.80 GHz boost and 2.53 GHz base clocks.

The Xeon E5630 does have some theoretical advantages that the benchmarks do not capture. It supports ECC memory, a feature absent on the i5-3550S, which is critical for server environments where data integrity is paramount. It also uses a triple-channel memory bus, compared to the i5’s dual-channel, which could improve memory bandwidth in certain server workloads. However, the benchmark data does not include any memory-intensive tests, so these advantages remain unquantified. The Xeon’s 12 MB shared L3 cache is double the i5’s 6 MB, which could benefit workloads with large working sets, but again, this does not translate into a win in any of the tested Cinebench scenarios.

For general desktop use, the i5-3550S is the better performer, and it also includes integrated graphics (Intel HD 2500), which the Xeon lacks entirely. This makes the i5-3550S a more versatile option for a standalone desktop system without a discrete GPU. The Xeon, on the other hand, is positioned for server or workstation builds where ECC memory and multi-socket configurations (implied by its Socket 1366 and Westmere-EP architecture) are more important than raw single-threaded speed.

Architecture Differences

The architectural gap between these two processors is substantial, with a four-year difference in release date. The Intel Core i5-3550S launched on April 28, 2012, while the Intel Xeon E5630 launched on March 15, 2010. The i5-3550S is built on Intel’s 22 nm process node, whereas the Xeon E5630 uses the older 32 nm node. This process advantage allows the i5-3550S to pack 1,400 million transistors into a 160 mm² die, compared to the Xeon’s 1,170 million transistors on a larger 239 mm² die.

The i5-3550S uses the Ivy Bridge architecture with a Core i5 (Ivy Bridge) generation label, while the Xeon E5630 is based on the Westmere architecture, specifically the Westmere-EP codename. The i5-3550S has 4 cores and 4 threads, while the Xeon E5630 has 4 cores but 8 threads thanks to Hyper-Threading. The Xeon’s base clock is 2.53 GHz with a boost of 2.80 GHz, while the i5-3550S runs at 3.00 GHz base and 3.70 GHz boost. The i5’s boost clock is a full 0.90 GHz higher than the Xeon’s, which explains its dominant single-core performance.

Cache configurations also differ significantly. Both have 64 KB L1 and 256 KB L2 per core, but the L3 cache differs: the i5-3550S has 6 MB shared, while the Xeon E5630 has 12 MB shared. The Xeon also supports ECC memory and uses a triple-channel memory bus, compared to the i5-3550S’s dual-channel bus. Both support DDR3 memory, but the Xeon’s triple-channel configuration provides a wider memory path. The i5-3550S uses PCIe Gen 3 with 16 lanes (CPU only), while the Xeon uses the older PCIe Gen 2. The i5-3550S also includes integrated graphics (Intel HD 2500), a feature entirely absent on the Xeon. The Xeon has a higher TDP of 80 watts versus the i5’s 65 watts, and it is marked as end-of-life, while the i5’s production status is not specified.

The Verdict

The data is unambiguous: the Intel Core i5-3550S is the faster processor in every benchmark category tested. It beats the Intel Xeon E5630 by roughly 18 percent in all Cinebench R15, R20, and R23 tests, both single-core and multicore. For anyone building a system where CPU rendering or general desktop performance is the priority, the i5-3550S is the superior choice. Its higher clock speeds, newer 22 nm Ivy Bridge architecture, and lower 65 watt TDP make it more efficient and faster than the older, higher-TDP Xeon.

The Xeon E5630’s only advantages are its 8 threads, 12 MB L3 cache, ECC memory support, and triple-channel memory bus. These features are relevant for server or workstation applications that require error-correcting memory and high memory bandwidth, but they do not translate into performance wins in the Cinebench tests. The Xeon’s end-of-life status and older 32 nm process further disadvantage it in terms of both performance and efficiency.

The i5-3550S also has the benefit of integrated graphics, making it a drop-in solution for a desktop without a discrete GPU. The Xeon requires a separate graphics card, adding cost and complexity to a build. Given that the i5-3550S wins 5 out of 5 benchmarks and offers a lower TDP, the verdict is straightforward: the i5-3550S is the better all-around processor. The Xeon E5630 should only be considered for niche server workloads that specifically require ECC memory and triple-channel memory support, where its benchmark deficit may be acceptable in exchange for those platform features.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core i5-3550S has a boost clock of 3.70 GHz, while the Intel Xeon E5630 has a boost clock of 2.80 GHz.

Q: How much faster is the i5-3550S in Cinebench R23 multicore?

A: The i5-3550S scores 3808 in Cinebench R23 multicore, which is 18 percent higher than the Xeon E5630’s score of 3226.

Q: Does the Xeon E5630 support ECC memory?

A: Yes, the Intel Xeon E5630 supports ECC memory, while the Intel Core i5-3550S does not.

Q: What are the thread counts for each processor?

A: The Intel Core i5-3550S has 4 cores and 4 threads, while the Intel Xeon E5630 has 4 cores and 8 threads.

Q: Which processor includes integrated graphics?

A: The Intel Core i5-3550S includes Intel HD 2500 integrated graphics, while the Intel Xeon E5630 has no integrated graphics.

Q: What is the TDP difference between the two?

A: The Intel Core i5-3550S has a TDP of 65 watts, while the Intel Xeon E5630 has a TDP of 80 watts.