Intel Core i7-5557U vs Intel Xeon E5-2609 v3 Comparison

The Intel Core i7-5557U and the Intel Xeon E5-2609 v3 are both end-of-life server and mobile processors, yet they target fundamentally different workloads. The data shows a decisive split: the Xeon E5-2609 v3 wins every single head-to-head benchmark included in the database, taking 5 out of 5 tests, while the Core i7-5557U does not win a single one. The Xeon's average benchmark score of 1109 is nearly identical to the Core i7's 1110, with a delta of just 0.1%, but that statistical tie in aggregate hides a consistent performance gap in favor of the six-core server chip across all measured Cinebench tests. The Core i7-5557U, a 28-watt dual-core mobile part, cedes ground on raw compute but offers integrated graphics and a much lower power envelope, making the comparison less about outright speed and more about platform capability.

Where Each One Wins

The Intel Xeon E5-2609 v3 dominates every benchmark where the two are directly compared. In Cinebench R15 multicore, it scores 386 against the Core i7's 270, a 30.1% advantage. That lead holds steady across every other test: the Xeon posts 1611 in Cinebench R20 multicore versus 1126, and 3836 in Cinebench R23 multicore versus 2682, both again roughly 30.1% ahead. Even in single-core tests, where the Core i7's higher 3.10 GHz base clock and 3.40 GHz boost clock might suggest an edge, the Xeon wins: 227 to 158 in R20 single-core and 541 to 378 in R23 single-core, with deltas of 30.4% and 30.1% respectively. The Xeon's wins come from its six physical cores and 15 MB of shared L3 cache, which provide a substantial throughput advantage in rendering and compute-heavy tasks.

The Intel Core i7-5557U wins in categories not captured by the benchmark scores. It is a mobile part on the Intel BGA 1168 socket with a 28-watt TDP, compared to the Xeon's 85-watt TDP on Socket 2011-3. It includes integrated Intel Iris 6100 graphics, whereas the Xeon has no integrated graphics at all. The Core i7 also supports DDR3 memory in a dual-channel configuration, while the Xeon requires DDR4 in a quad-channel setup. For a compact, low-power system that needs GPU output without a discrete card, the Core i7 is the only option of the two. The Xeon, with its 40 PCIe Gen 3 lanes versus the Core i7's 12 Gen 2 lanes, is built for expansion and server workloads, not for standalone desktop use.

The Verdict

The data is unambiguous: the Intel Xeon E5-2609 v3 is the faster processor in every measured test. For any workload that relies on multicore rendering, the Xeon is the choice. Its Cinebench R23 multicore score of 3836 is 30.1% higher than the Core i7's 2682, and it maintains that advantage in R15 and R20 as well. The Xeon also wins single-core tests, which is notable given the Core i7's higher clock speeds. The Xeon's six cores, 15 MB of L3 cache, and 51.2 GB/s of memory bandwidth from quad-channel DDR4 make it a capable compute engine for rendering and server tasks.

The Intel Core i7-5557U is the pick for a different set of requirements. It is a 28-watt mobile chip with integrated Iris 6100 graphics, meaning it can run in a thin laptop or all-in-one without a discrete GPU. Its 2 cores and 4 threads are sufficient for lighter tasks, and its average benchmark score of 1110 places it in the 31st percentile of all CPUs, the same percentile as the Xeon. If power efficiency, integrated graphics, or mobility matter more than raw compute, the Core i7 is the only viable option. The Xeon, with its 85-watt TDP, no integrated graphics, and server socket, is not a drop-in replacement for a mobile platform. The verdict is simple: pick the Xeon for performance, pick the Core i7 for platform fit.

Head-to-Head Benchmarks

The largest gap between the two chips appears in single-core performance, where the Xeon's lead is 30.4% in Cinebench R20 single-core. The Xeon scores 227 while the Core i7 scores 158, a surprising result given the Core i7's 3.40 GHz boost clock and the Xeon's fixed 1900.00 MHz base clock with no boost capability. The Xeon's architectural efficiency in the Haswell-EP design overcomes the clock deficit. In multicore tests, the Xeon's advantage is consistently 30.1% across Cinebench R15, R20, and R23. The R15 results show 386 versus 270, R20 shows 1611 versus 1126, and R23 shows 3836 versus 2682. The Xeon's six cores versus the Core i7's two cores provide a clear throughput advantage that scales across all rendering workloads.

The Core i7-5557U does have a single benchmark win in its favor: the Geekbench multicore test, where it scores 2099, and the Geekbench single-core test, where it scores 1060. However, these tests are not present in the head-to-head comparison table, which only includes Cinebench variants. The Xeon's head-to-head record is 5 wins and 0 losses, with no test where the Core i7 comes out ahead. The closest the Core i7 gets is in average benchmark score, where the two chips are separated by 0.1%, but that aggregate metric masks the consistent Cinebench losses. The data shows a processor that is uniformly slower in rendering benchmarks, with no competitive edge in any measured Cinebench test.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core i7-5557U has an average benchmark score of 1110, while the Intel Xeon E5-2609 v3 has a score of 1109. The delta is 0.1% in favor of the Core i7, making them statistically equivalent on average.

Q: How many cores and threads does each processor have?

A: The Intel Core i7-5557U has 2 cores and 4 threads. The Intel Xeon E5-2609 v3 has 6 cores and 6 threads, with no hyper-threading support.

Q: Does either processor include integrated graphics?

A: Yes, the Intel Core i7-5557U includes integrated Intel Iris 6100 graphics. The Intel Xeon E5-2609 v3 has no integrated graphics, requiring a discrete GPU for display output.

Q: What is the largest performance gap in the head-to-head benchmarks?

A: The largest gap is in Cinebench R20 single-core, where the Intel Xeon E5-2609 v3 scores 227 against the Intel Core i7-5557U's 158, a 30.4% difference in favor of the Xeon.

Q: Which processor supports ECC memory?

A: The Intel Xeon E5-2609 v3 supports ECC memory, while the Intel Core i7-5557U does not.

Q: What is the TDP of each processor?

A: The Intel Core i7-5557U has a TDP of 28 watts. The Intel Xeon E5-2609 v3 has a TDP of 85 watts.

Architecture Differences

The two processors come from different Intel architectures and process nodes. The Intel Core i7-5557U is built on Broadwell-U, a 14 nm process with 1,900 million transistors on a 133 mm² die. It uses the Intel BGA 1168 socket and is classified as a mobile part. The Intel Xeon E5-2609 v3 is built on Haswell-EP, a 22 nm process with 2,600 million transistors on a 356 mm² die. It uses the Intel Socket 2011-3 and is a server/workstation part. The Xeon's larger die and transistor count reflect its additional cores and cache.

Cache configurations differ significantly. The Core i7-5557U has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 4 MB of shared L3 cache. The Xeon E5-2609 v3 also has 64 KB of L1 and 256 KB of L2 per core, but its L3 cache is 15 MB shared across six cores. That 11 MB difference in L3 cache is a major factor in the Xeon's multicore performance advantage.

Memory support is another key differentiator. The Core i7-5557U supports DDR3 in a dual-channel configuration, providing 29.9 GB/s of memory bandwidth. The Xeon E5-2609 v3 supports DDR4 in a quad-channel configuration, providing 51.2 GB/s of bandwidth. The Xeon also supports ECC memory, which the Core i7 does not. PCIe connectivity also differs: the Core i7 offers Gen 2 with 12 lanes, while the Xeon offers Gen 3 with 40 lanes. The Xeon's quad-channel memory and 40 PCIe lanes are designed for high-throughput server workloads, while the Core i7's dual-channel DDR3 and Gen 2 lanes are sufficient for mobile tasks. The Core i7's integrated Iris 6100 graphics and 28-watt TDP make it a self-contained mobile solution, whereas the Xeon's 85-watt TDP and lack of integrated graphics require a dedicated GPU and a server-class motherboard. The Xeon also has a higher base clock of 1900.00 MHz with no boost clock, while the Core i7 has a 3.10 GHz base and 3.40 GHz boost. The Xeon's launch MSRP is $306, and the Core i7's launch MSRP is $426.