Intel Core i7-3612QM vs Intel Xeon D-1518 Comparison

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i7-3612QM wins all six head-to-head benchmark comparisons. In Cinebench R23 multi-core, it scores 3944 versus the Xeon D-1518's 3877, a 1.7% advantage. The margin is consistent across all tests, ranging from 1.6% to 1.8% in the i7's favor.

Q: How do the two compare in single-core performance?

A: The Core i7-3612QM also edges ahead in single-core tests. In Cinebench R23 single-core, it scores 556 against the Xeon D-1518's 547, representing a 1.6% lead. The R15 single-core test shows the same pattern: 55 versus 54, a 1.8% difference.

Q: Do both processors have the same core and thread configuration?

A: Yes. Both the Intel Xeon D-1518 and the Intel Core i7-3612QM feature 4 cores and 8 threads. This is a direct 4-core, 8-thread matchup, making the benchmark differences purely architectural and clock-related.

Q: What is the average benchmark score for each CPU?

A: The Core i7-3612QM has an average benchmark score of 1129, while the Xeon D-1518 sits at 1121. This places the i7 0.7% ahead on average, and both land in the 32nd percentile among all CPUs.

Q: Which processor supports ECC memory?

A: Only the Intel Xeon D-1518 supports ECC memory. The Core i7-3612QM does not. This is a significant differentiator for server or workstation use where data integrity matters.

Q: What are the release dates for these two chips?

A: The Core i7-3612QM was released on 2012-04-28, while the Xeon D-1518 launched on 2015-03-08. The Xeon arrives roughly three years later, yet it still trails the older mobile chip in every benchmark measured.

Architecture Differences

The Intel Xeon D-1518 is built on the Broadwell architecture using a 14 nm process node, while the Core i7-3612QM uses the older Ivy Bridge architecture on a 22 nm node. This gives the Xeon a distinct manufacturing advantage—smaller transistors typically mean better power efficiency and density. The Xeon packs 3,200 million transistors on a 246 mm² die, whereas the i7 has just 1,400 million transistors on a 160 mm² die. That is more than double the transistor count for the Xeon, reflecting the newer process and additional server-oriented features.

Cache layouts differ substantially. The Xeon D-1518 provides 1.5 MB of L3 cache per core, which for a 4-core part totals 6 MB, matching the i7's shared 6 MB L3 cache. However, the distribution is different—per-core versus shared. The i7-3612QM also has a boost clock of 3.10 GHz, while the Xeon D-1518 lists no boost clock at all, only a 2.20 GHz base. The i7's base is 2.10 GHz, so it relies on Turbo Boost to pull ahead.

Memory support diverges sharply. The Xeon D-1518 supports both DDR3 and DDR4 memory in dual-channel configuration, with ECC capability. The i7-3612QM has no listed memory support details but lacks ECC entirely. The Xeon also brings PCIe Gen 3 with 24 lanes (CPU only), while the i7 lists no PCIe information. The Xeon targets the server/workstation segment, whereas the i7 is a mobile part with integrated Intel HD 4000 graphics. The i7 uses Socket G2 (988B), while the Xeon uses Intel BGA 1667, meaning they are not socket-compatible.

Head-to-Head Benchmarks

The benchmark results are remarkably consistent—the Core i7-3612QM wins every single test, but by margins that are almost negligible. In Cinebench R15 multi-core, the i7 scores 397 against the Xeon's 390, a 1.8% lead. The R15 single-core test shows the same 1.8% gap: 55 versus 54. These are tight numbers, suggesting the two chips are nearly identical in real-world throughput.

Moving to Cinebench R20, the pattern holds. Multi-core results show the i7 at 1656 and the Xeon at 1628, a 1.7% difference. Single-core R20 has the i7 at 233 and the Xeon at 229, again 1.7% apart. The consistency across different Cinebench versions indicates this is a stable, repeatable performance gap rather than a test artifact.

Cinebench R23 continues the trend. Multi-core scores are 3944 for the i7 and 3877 for the Xeon, a 1.7% edge. Single-core R23 shows 556 versus 547, a 1.6% difference. The narrowing of the gap from R15 to R23 suggests the newer benchmarks may slightly favor the Xeon's architecture, but the i7 still maintains its lead.

The Core i7-3612QM also has Geekbench results in its favor: 1691 multi-core and 501 single-core. The Xeon D-1518 has no Geekbench scores listed, so a direct comparison there is impossible. Still, the available data paints a clear picture—the i7 wins 6 out of 6 head-to-head tests, albeit by margins under 2%.

What is striking is how close these processors are despite the architectural differences. The Xeon's newer 14 nm process and higher transistor count do not translate into a performance advantage in these CPU-bound tests. The i7's boost clock up to 3.10 GHz likely compensates for its older architecture, delivering just enough extra frequency to edge out the Xeon in every workload.

The Verdict

The data points to a straightforward conclusion: the Intel Core i7-3612QM is the faster processor in every benchmark measured, but only by a hair. With a 1.6% to 1.8% lead across all six Cinebench tests, the performance difference is real but practically imperceptible in daily use. The i7's average benchmark score of 1129 versus the Xeon's 1121 confirms this narrow margin.

However, the choice is not purely about speed. The Xeon D-1518 brings server-grade features that the i7 lacks: ECC memory support, DDR4 compatibility, and a 24-lane PCIe Gen 3 interface. The Xeon is also marked as "Active" in production status, while the i7's status is not listed. For a workstation or server workload where data integrity and memory reliability are paramount, the Xeon's feature set justifies its slight performance deficit.

The i7-3612QM, on the other hand, is a mobile processor with integrated graphics, targeting laptops and compact systems. It has no ECC support and no PCIe lane information provided. Its advantage is purely computational, making it the better choice for raw processing power in a mobile form factor.

The verdict hinges on use case. If the priority is maximum CPU throughput and the platform supports Socket G2, the i7 wins. If the priority is a server environment requiring ECC memory and modern memory types, the Xeon D-1518 is the appropriate pick, accepting a sub-2% performance penalty. Both chips sit at the 32nd percentile among all CPUs, placing them in the same performance tier overall.

Specification Differences

The two processors differ in nearly every major specification category. The Xeon D-1518 uses a 14 nm process node versus the i7's 22 nm, and its transistor count is 3,200 million compared to 1,400 million. Die size also differs: 246 mm² for the Xeon versus 160 mm² for the i7.

Base clock speeds are close—2.20 GHz for the Xeon and 2.10 GHz for the i7—but the i7 adds a 3.10 GHz boost clock, which the Xeon lacks entirely. Both have 4 cores and 8 threads, and both are locked (multiplier unlocked: false). TDP is identical at 35 watts.

Cache configuration differs: the Xeon has 1.5 MB of L3 per core, while the i7 has 6 MB shared. L1 and L2 caches are the same at 64 KB and 256 KB per core, respectively.

Memory support is a major split. The Xeon supports DDR3 and DDR4 with ECC, while the i7 has no listed memory support and no ECC. Memory bus is dual-channel for both. The Xeon has PCIe Gen 3 with 24 lanes, while the i7 lists no PCIe information.

Integrated graphics are present only on the i7 (Intel HD 4000); the Xeon has none. Sockets differ: Intel BGA 1667 for the Xeon, Intel Socket G2 (988B) for the i7. Market segments are server/workstation versus mobile. The Xeon was released on 2015-03-08 with a $193 launch MSRP; the i7 was released on 2012-04-28 with no listed MSRP.

Where Each One Wins

The Intel Core i7-3612QM wins in pure computational performance. It takes all six head-to-head benchmark victories, including multi-core and single-core tests across Cinebench R15, R20, and R23. Its Geekbench scores of 1691 multi-core and 501 single-core further demonstrate its processing strength. The i7 also offers integrated graphics, which could be a deciding factor for systems that need display output without a discrete GPU.

The Intel Xeon D-1518 wins in the server and workstation feature set. It supports ECC memory, which is critical for error correction in data-intensive workloads. It handles both DDR3 and DDR4 memory, providing flexibility in system design. Its 24 PCIe Gen 3 lanes offer more expansion capability for storage controllers, network cards, or accelerators. The Xeon is also the newer release by roughly three years, and it remains in active production status.

The use-case split is clear. Mobile and general-purpose computing favors the i7-3612QM due to its higher benchmark scores and integrated graphics. Server environments, especially those requiring ECC and modern memory, favor the Xeon D-1518 despite its slight performance deficit. For workloads that are purely CPU-bound and do not require server features, the i7 is the better performer. For reliability-focused tasks where data integrity matters more than a 1.7% speed difference, the Xeon is the logical choice.