Intel Core i5-5675C vs Intel Xeon E5-2637 v3 Comparison

The Intel Xeon E5-2637 v3 and the Intel Core i5-5675C are both four-core Intel parts that land in the same performance percentile, yet they are built for entirely different jobs. The Xeon sweeps every benchmark in this comparison, posting scores roughly 25% higher across the board, while the Core i5 counters with a lower power envelope, an unlocked multiplier, and integrated graphics. This is not a contest of raw speed—the Xeon wins that decisively—but a choice between a workstation-oriented processor with server features and a desktop chip designed for flexibility and efficiency.

Where Each One Wins

The Intel Xeon E5-2637 v3 wins every single benchmark in this head-to-head comparison, taking all six tests with a consistent margin of about 25%. Its dominance is uniform across both multi-core and single-core workloads, which makes it the clear choice for any task that prioritizes computational throughput. In Cinebench R23 multi-core, the Xeon scores 6130 versus the Core i5’s 4912, and in single-core it posts 865 against 693. This consistency suggests the Xeon’s advantage is architectural and fundamental, not tied to a specific workload type.

The Core i5-5675C, despite losing every benchmark, wins in areas that do not appear in the scoring table. It carries a 65 W TDP versus the Xeon’s 135 W, making it far more suitable for compact or low-power desktop builds. It also includes Iris Pro Graphics 6200, which means it can output to a display without a discrete graphics card—something the Xeon cannot do. The unlocked multiplier on the Core i5 is another practical win, as it allows users to adjust clock speeds beyond the stock 3.60 GHz boost, whereas the Xeon is locked at its factory settings. For a user who values efficiency, integrated visuals, and overclocking headroom, the Core i5 is the only one that offers those features.

Architecture Differences

The two processors come from different Intel microarchitectures and target different sockets. The Xeon E5-2637 v3 uses the Haswell-EP architecture on a 22 nm process, while the Core i5-5675C uses Broadwell on a 14 nm node. The die size reflects this generational shift: the Xeon measures 356 mm² with 2,600 million transistors, whereas the Core i5 is much smaller at 182 mm². The smaller process node gives the Core i5 a transistor density advantage, but the Xeon’s larger die accommodates a substantially larger cache.

Cache configuration is a major differentiator. The Xeon has 15 MB of shared L3 cache, while the Core i5 has only 4 MB. Both share the same 64 KB L1 and 256 KB L2 per core, but the Xeon’s nearly fourfold L3 advantage likely contributes to its benchmark lead, especially in multi-threaded rendering tasks where working sets exceed the smaller cache. Memory support also diverges sharply: the Xeon uses DDR4 on a quad-channel bus with 68.3 GB/s of bandwidth, while the Core i5 uses DDR3 on a dual-channel bus with 25.6 GB/s. This is a 2.7x bandwidth gap that heavily favors the server part.

Other architectural differences include the Xeon’s support for ECC memory, which the Core i5 lacks, and PCIe lane counts. The Xeon provides 40 PCIe Gen 3 lanes from the CPU, while the Core i5 offers 16. The Xeon also targets the server/workstation market segment with an LGA 2011-3 socket, whereas the Core i5 is a desktop part on LGA 1150. Thread count differs as well: the Xeon has 8 threads via Hyper-Threading, while the Core i5 has 4 threads without it. Clock speeds favor the Xeon, with a 3.50 GHz base and 3.70 GHz boost versus the Core i5’s 3.10 GHz base and 3.60 GHz boost.

Head-to-Head Benchmarks

The benchmark data is unambiguous: the Xeon E5-2637 v3 wins all six tests, with deltas ranging from 24.6% to 26.1%. The smallest margin is in Cinebench R15 multi-core, where the Xeon scores 617 against the Core i5’s 495, a 24.6% lead. The largest margin is in Cinebench R15 single-core, where the Xeon’s 87 beats the Core i5’s 69 by 26.1%. These two tests bracket the range, but the other four sit nearly identically around 24.7–24.8%.

In Cinebench R20 multi-core, the Xeon posts 2574 versus 2063, a 24.8% advantage. Single-core in R20 shows 363 against 291, a 24.7% lead. The R23 results mirror this pattern exactly: multi-core is 6130 to 4912 (24.8%), and single-core is 865 to 693 (24.8%). The uniformity of these margins is notable—it suggests that the Xeon’s advantage is not workload-specific but rather a consistent performance multiplier across rendering and single-threaded tasks.

The Core i5’s Geekbench scores, which appear only in its own benchmark list, are 4159 multi-core and 1388 single-core. The Xeon has no Geekbench entry in the FACT PACK, so a direct comparison there is unavailable. However, the Cinebench results alone show that the Xeon outperforms the Core i5 by roughly a quarter in every measured metric, making the performance hierarchy clear.

FAQ

Q: Which processor has more threads?

A: The Intel Xeon E5-2637 v3 has 8 threads, while the Intel Core i5-5675C has 4 threads. Both have 4 cores, but the Xeon enables Hyper-Threading.

Q: Does the Core i5-5675C support ECC memory?

A: No, the Core i5-5675C does not support ECC memory. The Xeon E5-2637 v3 does support ECC memory, which is a common requirement for server and workstation reliability.

Q: What is the performance difference in Cinebench R23 multi-core?

A: The Xeon E5-2637 v3 scores 6130, while the Core i5-5675C scores 4912. This gives the Xeon a 24.8% lead in that test.

Q: Can the Core i5-5675C run without a discrete graphics card?

A: Yes, the Core i5-5675C includes integrated Iris Pro Graphics 6200, so it can output video without a separate GPU. The Xeon E5-2637 v3 has no integrated graphics.

Q: Which processor has a higher boost clock?

A: The Xeon E5-2637 v3 has a boost clock of 3.70 GHz, which is higher than the Core i5-5675C’s 3.60 GHz boost. The Xeon also has a higher base clock at 3.50 GHz versus 3.10 GHz.

Q: What is the memory bandwidth difference?

A: The Xeon E5-2637 v3 provides 68.3 GB/s with quad-channel DDR4, while the Core i5-5675C provides 25.6 GB/s with dual-channel DDR3. That is a 2.7x gap in favor of the Xeon.

Specification Differences

The two CPUs differ in nearly every major specification category. The Xeon E5-2637 v3 uses the Haswell-EP architecture on a 22 nm process with a 356 mm² die containing 2,600 million transistors. The Core i5-5675C uses Broadwell on a 14 nm process with a 182 mm² die, and transistor count is not listed. Cache sizes diverge dramatically: the Xeon has 15 MB of shared L3, while the Core i5 has 4 MB. L1 and L2 are identical per core at 64 KB and 256 KB, respectively.

Memory support is a major split. The Xeon runs DDR4 on a quad-channel bus with 68.3 GB/s bandwidth, while the Core i5 runs DDR3 on a dual-channel bus with 25.6 GB/s. ECC memory is supported on the Xeon but not on the Core i5. PCIe lanes differ, with the Xeon providing 40 Gen 3 lanes versus the Core i5’s 16. The Xeon has no integrated graphics, while the Core i5 includes Iris Pro Graphics 6200.

Clock speeds favor the Xeon: 3.50 GHz base and 3.70 GHz boost versus 3.10 GHz base and 3.60 GHz boost. The Xeon has 8 threads to the Core i5’s 4. The Xeon’s TDP is 135 W, while the Core i5’s is 65 W. The Xeon is locked, while the Core i5 has an unlocked multiplier. Sockets differ: LGA 2011-3 for the Xeon and LGA 1150 for the Core i5. The Xeon is marked as end-of-life, while the Core i5 is marked as active. Release dates differ by about eight months, with the Xeon arriving in September 2014 and the Core i5 in May 2015.

The Verdict

The data directs the Xeon E5-2637 v3 to anyone who needs maximum compute performance in a four-core form factor. It wins every benchmark by nearly 25%, has 8 threads, 15 MB of L3 cache, quad-channel DDR4, and ECC support. These features make it appropriate for server or workstation environments where rendering, simulation, or data integrity are priorities. The 135 W TDP and lack of integrated graphics are non-issues in systems that already have a discrete GPU and robust cooling.

The Core i5-5675C is the pick for desktop builders who prioritize efficiency and flexibility over raw score. Its 65 W TDP allows for smaller, quieter systems, and the integrated Iris Pro Graphics 6200 removes the need for a separate GPU in basic configurations. The unlocked multiplier gives overclocking headroom beyond the 3.60 GHz boost, which partially compensates for its lower stock clocks. The 4 MB L3 and dual-channel DDR3 are limiting factors, but for everyday desktop workloads or a compact build, the Core i5 offers a usable feature set at a significantly lower launch MSRP.

Both processors sit at the 41st percentile among all CPUs, and their average benchmark scores are very close—1773 for the Xeon and 1759 for the Core i5. That near-parity in aggregate stats makes the benchmark sweep surprising, but the head-to-head results are consistent. The Xeon is the performance king; the Core i5 is the efficiency and feature play. Choose the Xeon for compute, the Core i5 for a flexible desktop.