Intel Core i7-4940MX vs Intel Xeon E5-1630 v4 Comparison

The Intel Core i7-4940MX and the Intel Xeon E5-1630 v4 are both 4-core, 8-thread Intel parts, but they target completely different platforms and design philosophies. The data reveals a consistent performance advantage for the Xeon across every benchmark recorded, despite the Core i7 Extreme's mobile pedigree and higher launch MSRP. This analysis breaks down the head-to-head results, architectural differences, and what the numbers mean for potential use cases.

Head-to-Head Benchmarks

The benchmark results are remarkably one-sided. The Xeon E5-1630 v4 wins all six head-to-head tests, with the Core i7-4940MX trailing by nearly the same margin in every discipline. In Cinebench R15 multicore, the Xeon scores 651 against the Core i7's 580, a delta of -10.9% for the mobile chip. The single-core test tells a similar story: 91 versus 81, a -11% gap. This pattern holds across newer Cinebench versions, with R20 multicore showing 2714 versus 2418 (-10.9%) and R23 multicore showing 6464 versus 5759 (-10.9%). The single-core deltas remain pinned at -11% in R20 (383 vs 341) and -10.9% in R23 (912 vs 813).

The consistency of these deltas is striking. A -10.9% or -11% gap in every single test suggests the performance difference is not workload-specific but rather a fundamental throughput advantage. The Xeon's higher base clock (3.70 GHz vs 3.10 GHz) likely drives this, as both chips boost to the same 4.00 GHz. The Core i7 cannot compensate with its unlocked multiplier in these stock benchmark runs. Notably, the Core i7 has additional Geekbench scores (3869 multicore, 1227 singlecore) that the Xeon lacks, but in the tests where both are measured, the Xeon leads uniformly. The data shows no scenario where the Core i7 pulls ahead, making this a straightforward comparison in raw compute.

Architecture Differences

The two processors come from different Intel generations and manufacturing nodes. The Core i7-4940MX is built on Haswell at 22 nm, while the Xeon E5-1630 v4 uses Broadwell-EP at 14 nm. This node shrink explains part of the efficiency and clock behavior. The transistor counts diverge sharply: the Haswell chip packs 1,400 million transistors on a 177 mm² die, whereas the Broadwell-EP integrates 3,400 million transistors on a 246 mm² die. The Xeon's larger, denser design supports its higher base clock and larger cache.

Cache configurations differ as well. Both have 64 KB L1 and 256 KB L2 per core, but the shared L3 jumps from 8 MB on the Core i7 to 10 MB on the Xeon. That extra 2 MB of L3 can reduce memory latency for frequently accessed data, contributing to the Xeon's single-core edge. The memory subsystem is another major divergence. The Core i7 supports dual-channel DDR3 with 25.6 GB/s bandwidth, while the Xeon supports quad-channel DDR4 with 76.8 GB/s. Three times the memory bandwidth is a massive advantage for the Xeon in bandwidth-hungry workloads.

Feature sets also separate the two. The Xeon supports ECC memory, essential for error-checking in server environments, while the Core i7 does not. The Core i7 includes Intel HD 4600 integrated graphics; the Xeon has no iGPU. PCIe lane allocation differs significantly: the Xeon offers 40 lanes (Gen 3) versus the Core i7's 16 lanes. The Core i7 has an unlocked multiplier, allowing overclocking, while the Xeon is locked. Socket and market positioning also differ—the Core i7 uses Intel Socket G3 for mobile, while the Xeon uses Socket 2011-3 for desktop/workstation.

FAQ

Q: Which processor has a higher base clock speed?

A: The Intel Xeon E5-1630 v4 runs at 3.70 GHz base, compared to the Core i7-4940MX's 3.10 GHz. Both boost to 4.00 GHz, but the Xeon's higher idle-to-boost range gives it a consistent per-clock advantage.

Q: Do both chips support the same memory type?

A: No. The Core i7-4940MX uses dual-channel DDR3 with 25.6 GB/s bandwidth, while the Xeon E5-1630 v4 uses quad-channel DDR4 with 76.8 GB/s. The Xeon also supports ECC memory, which the Core i7 lacks.

Q: Is the Xeon E5-1630 v4 better in every benchmark recorded?

A: Yes. In all six head-to-head Cinebench tests (R15, R20, R23, both single and multicore), the Xeon wins with deltas ranging from -10.9% to -11% for the Core i7. The Core i7 has no benchmark wins in this comparison.

Q: Which processor has more cache?

A: The Xeon E5-1630 v4 has 10 MB of shared L3 cache, while the Core i7-4940MX has 8 MB. Both share the same 64 KB L1 and 256 KB L2 per-core structure.

Q: Can either processor be overclocked?

A: The Core i7-4940MX has an unlocked multiplier, enabling overclocking. The Xeon E5-1630 v4 has a locked multiplier, so it cannot be overclocked in the traditional sense. This is a notable advantage for the mobile chip, although the stock benchmark data does not reflect overclocked performance.

Q: What are the production statuses and release dates?

A: Both are end-of-life products. The Core i7-4940MX was released in January 2014, while the Xeon E5-1630 v4 came later in June 2016. The Xeon is the newer design by roughly two and a half years.

Specification Differences

The two processors differ in nearly every major specification category. The most obvious gap is TDP: the Core i7-4940MX draws 57 W, while the Xeon E5-1630 v4 draws 140 W. This reflects the mobile versus desktop/workstation positioning. The process node differs (22 nm vs 14 nm), as do transistor counts (1,400 million vs 3,400 million) and die sizes (177 mm² vs 246 mm²). Base clocks differ (3.10 vs 3.70 GHz), though boost clocks match at 4.00 GHz. L3 cache differs (8 MB vs 10 MB). Memory support diverges completely (DDR3 dual-channel vs DDR4 quad-channel, 25.6 vs 76.8 GB/s, no ECC vs ECC). PCIe lanes differ (16 vs 40). The Core i7 has integrated graphics (Intel HD 4600); the Xeon has none. Sockets differ (G3 vs 2011-3). The Core i7 has an unlocked multiplier; the Xeon is locked. Part numbers and release dates also differ, as do launch MSRPs—the Core i7 launched at $1096, the Xeon at $406.

The Verdict

The data points decisively to the Intel Xeon E5-1630 v4 for pure computational performance. It wins every benchmark by roughly 11%, offers triple the memory bandwidth, twice the PCIe lanes, ECC support, and newer architecture. The Core i7-4940MX's only advantages are a lower TDP (57 W vs 140 W), an unlocked multiplier, integrated graphics, and a much higher launch MSRP. For anyone building a system where raw compute matters, the Xeon is the clear choice. The Core i7's mobile positioning makes it a niche part for high-end laptops, but in a head-to-head comparison, it loses on every measured metric. The Xeon also achieves this with a lower launch MSRP, making the Core i7's premium hard to justify from a performance-per-dollar standpoint, though pricing discussions are beyond the scope of this data.

Where Each One Wins

Intel Xeon E5-1630 v4: This chip wins in every benchmark scenario recorded. It is the better choice for multi-threaded rendering (Cinebench R15/R20/R23 multicore), single-threaded responsiveness (all single-core tests), and any workload that benefits from the quad-channel DDR4 memory bandwidth (76.8 GB/s vs 25.6 GB/s). The 40 PCIe lanes make it suitable for systems with multiple GPUs or NVMe drives. ECC memory support makes it viable for error-sensitive compute tasks. The 10 MB L3 cache and 14 nm node give it a modern efficiency profile.

Intel Core i7-4940MX: The data shows no benchmark wins, but this chip has structural advantages. The 57 W TDP means it can fit in mobile or compact systems where the 140 W Xeon would be impractical. The unlocked multiplier allows overclocking, which could close the gap in the hands of a skilled user. The integrated Intel HD 4600 GPU eliminates the need for a discrete graphics card in basic display tasks. Its 16 PCIe lanes and dual-channel DDR3 suffice for mainstream mobile workloads. For a laptop user needing a quad-core Extreme Edition chip, this is the only option between the two, but the performance deficit of roughly 11% is a constant trade-off. The Xeon is the better desktop or workstation processor; the Core i7 is the better fit for a mobile platform, despite its benchmark disadvantage.