Intel Core i3-1125G4 vs Intel Xeon E5-2630L v3 Comparison

The Intel Core i3-1125G4 and Intel Xeon E5-2630L v3 occupy opposite ends of the computing spectrum: a 15-watt mobile processor built for ultraportables versus a 55-watt server/workstation chip designed for sustained multi-threaded loads. Despite the generational gap, the benchmark data reveals that the older Xeon holds a consistent, narrow edge across every measured Cinebench test. However, the specific architecture goals, memory features, and platform ecosystems of each processor determine where they are best deployed, and those differences are more pronounced than the raw score deltas suggest.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-2630L v3 offers 8 cores and 16 threads, while the Intel Core i3-1125G4 provides 4 cores and 8 threads. This gives the Xeon a 2x advantage in both core count and thread count.

Q: How do their single-core benchmark scores compare?

A: In Cinebench R23 single-core, the Xeon scores 1176 versus the Core i3's 1109, a 5.7% difference in favor of the Xeon. The gap is similar in R20 single-core, with the Xeon at 493 and the Core i3 at 465 (a 5.7% delta).

Q: Which processor supports ECC memory?

A: The Intel Xeon E5-2630L v3 supports ECC memory, while the Intel Core i3-1125G4 does not. This makes the Xeon the appropriate choice for error-correcting memory environments typical of servers and workstations.

Q: What are the memory channel configurations?

A: The Xeon E5-2630L v3 uses a quad-channel memory bus, whereas the Core i3-1125G4 uses a dual-channel bus. The Xeon also has a published memory bandwidth of 59.7 GB/s, a figure not listed for the Core i3.

Q: What are the process nodes and release dates?

A: The Core i3-1125G4 is built on Intel's 10 nm process, part of the Tiger Lake-U generation, and was released on 2021-03-30. The Xeon E5-2630L v3 uses Intel's 22 nm process (Haswell-EP) and was released on 2014-09-07.

Q: How do their average benchmark scores compare to their nearest rivals?

A: The Core i3-1125G4 has an average benchmark score of 2451, sitting between the Intel Core i5-8600 (2454, delta -0.1%) and the Intel Xeon D-1541 (2447, delta +0.1%). The Xeon E5-2630L v3 averages 2409, placing it just below the AMD Ryzen 3 PRO 4450U (2413, delta -0.1%) and above the Intel Core i5-1038NG7 (2398, delta +0.5%).

Where Each One Wins

The benchmark results show a clear, if narrow, sweep: the Intel Xeon E5-2630L v3 wins all six head-to-head Cinebench comparisons. The largest margin is in single-core tests, where it leads by 5.9% in Cinebench R15 single-core (118 vs 111) and by 5.7% in both R20 and R23 single-core. In multi-core tests, the Xeon consistently leads by 5.6% across R15, R20, and R23, with scores of 839 vs 792, 3498 vs 3301, and 8330 vs 7860, respectively.

That said, the Core i3-1125G4 is not without its own domain. Its 15-watt TDP and integrated Iris Xe-LP Graphics G4 make it a far more appropriate fit for thin-and-light mobile systems where power draw and space are critical constraints. The data does not include power consumption benchmarks, but the platform specifications alone indicate that the Core i3 is designed for efficiency-first environments, not raw throughput.

The Xeon's strengths are architectural and platform-based. With 20 MB of shared L3 cache, quad-channel DDR4 memory support, and 40 PCIe Gen 3 lanes, it is built for memory-bandwidth-sensitive server workloads and multi-device expansion. The Core i3, with 8 MB of shared L3 cache, dual-channel memory, and 16 PCIe Gen 4 lanes, cannot match that breadth of I/O or memory scalability. For a database server or virtualization host that needs ECC memory and high core density, the Xeon is the clear choice; for a portable consumer laptop, the Core i3's lower power envelope and integrated graphics make it the only practical option.

Architecture Differences

The architectural split between these two processors is a study in contrasting design philosophies. The Core i3-1125G4 uses the Tiger Lake-U architecture, built on Intel's 10 nm node with a die size of 144 mm². It is a monolithic design with 4 cores based on the Willow Cove microarchitecture. The Xeon E5-2630L v3, by contrast, is based on the Haswell-EP architecture on a 22 nm process, with a significantly larger die at 356 mm² and 2,600 million transistors. This older, larger node is less power-efficient, but the Xeon compensates by providing 8 cores and 16 threads within the same physical package.

Cache topology is another major divergence. The Core i3 has 80 KB of L1 cache per core and 1.25 MB of L2 per core, while the Xeon has 64 KB L1 per core and 256 KB L2 per core. The Xeon's L3 cache is 20 MB shared, versus 8 MB shared on the Core i3. This means the Xeon has more than double the last-level cache, which is critical for workloads with large working sets that must be kept close to the cores.

Integrated graphics also separate the two. The Core i3 includes Iris Xe-LP Graphics G4, whereas the Xeon has no integrated graphics at all, requiring a discrete GPU for any display output. This is consistent with the Xeon's server/workstation market segment, where headless operation or dedicated accelerators are the norm. The Core i3's memory support includes both DDR4 and LPDDR4X, while the Xeon only supports DDR4. The Xeon's memory bandwidth is rated at 59.7 GB/s, a specification not provided for the Core i3.

Specification Differences

The two processors diverge across nearly every core specification. The Core i3-1125G4 has a base clock of 2000.00 MHz and a boost clock of 3.70 GHz, while the Xeon E5-2630L v3 has a base clock of 1800.00 MHz and a boost clock of 2.90 GHz. The Core i3 is therefore 200 MHz faster at base and 800 MHz faster at boost, yet it still loses all single-core benchmark tests, indicating that the Xeon's older Haswell architecture delivers higher instructions-per-clock in these specific Cinebench workloads.

Thermal design power is a major differentiator: the Core i3 is rated at 15 watts, while the Xeon is rated at 55 watts. This is a 3.7x difference in thermal envelope, which directly explains the Xeon's ability to house 8 cores and 20 MB of L3 cache. The socket types are incompatible, with the Core i3 using Intel BGA 1449 and the Xeon using Intel Socket 2011-3.

PCIe capabilities also differ. The Core i3 supports PCIe Gen 4 with 16 lanes (CPU only), while the Xeon supports PCIe Gen 3 with 40 lanes (CPU only). This means the Xeon offers more expansion lanes, but they run on an older standard. The Core i3's launch MSRP is $281; the Xeon's launch MSRP is $612. Both processors are end-of-life and have locked multipliers.

Head-to-Head Benchmarks

The benchmark data is unambiguous: the Xeon E5-2630L v3 wins every one of the six tested workloads. The smallest margin is in Cinebench R15 single-core, where the Xeon scores 118 against the Core i3's 111, a 5.9% advantage. The largest margins are also in single-core tests, with the Xeon ahead by 5.7% in both R20 (493 vs 465) and R23 (1176 vs 1109).

The multi-core results are equally consistent. In Cinebench R15 multi-core, the Xeon scores 839 versus 792 for the Core i3, a 5.6% lead. The same 5.6% delta appears in R20 multi-core (3498 vs 3301) and R23 multi-core (8330 vs 7860). This uniformity across all three Cinebench versions suggests that the performance gap is stable across different rendering workloads, rather than being sensitive to specific test conditions.

The overall benchmark averages tell a similar story. The Core i3-1125G4 has an average benchmark score of 2451, while the Xeon E5-2630L v3 averages 2409. Despite the Xeon winning every head-to-head test, its average is actually lower than the Core i3's, because the Xeon's suite includes only Cinebench results, whereas the Core i3 also has Geekbench multi-core (4509) and single-core (1461) scores that raise its average. The Core i3's nearest rival by average score is the Intel Core i5-8600 at 2454 (delta -0.1%), while the Xeon's nearest rival is the AMD Ryzen 3 PRO 4450U at 2413 (delta -0.1%).

The practical interpretation is that the Xeon's advantage is real but modest—roughly 5-6% across the board. The Core i3's higher clocks and newer process do not overcome the Xeon's additional cores, larger cache, and more robust memory subsystem in these rendering benchmarks. Yet the Core i3's Geekbench scores, which are not available for the Xeon, show it achieving 4509 multi-core and 1461 single-core, indicating that outside Cinebench, its performance profile may differ. The data available, however, shows the Xeon as the consistent winner in every directly comparable test.