Intel Core i7-1180G7 vs Intel Xeon E3-1535M v5 Comparison

The Intel Xeon E3-1535M v5 and the Intel Core i7-1180G7 are both 4-core, 8-thread processors, but they represent dramatically different design philosophies and eras. The Xeon is a 45-watt workstation part from the Skylake generation, while the i7 is a 9-watt ultra-mobile part from Tiger Lake. Despite a six-year gap in release dates and a five-fold difference in thermal design power, the benchmark data shows a remarkably tight competition, with the older Xeon edging out a narrow victory across every single test.

Where Each One Wins

The data presents an unusual situation: the Intel Xeon E3-1535M v5 wins all six head-to-head benchmark comparisons, but by margins so small they are nearly negligible. The largest victory is a 1.1% lead in Cinebench R15 single-core, while the other five tests show leads of only 0.7% to 0.8%. This means there is no meaningful use-case split where one processor decisively dominates the other. The Xeon’s wins are consistent but marginal, suggesting it holds a slight edge in both single-threaded and multi-threaded workloads.

The Core i7-1180G7, despite losing every comparison, is not a clear loser in practical terms. Its scores are within a single percentage point of the Xeon across all tests, which places it in the same performance tier. The i7 accomplishes this with a 9-watt TDP compared to the Xeon’s 45 watts, implying that for battery-constrained and thermally limited mobile designs, the i7 delivers equivalent performance at a fraction of the power budget. The Xeon, on the other hand, offers this performance with the reliability and platform features expected of a workstation part. The real differentiation is not in benchmark victories but in platform characteristics: the Xeon supports ECC memory, while the i7 does not, and the i7 features a more modern PCIe Gen 4 interface, while the Xeon is limited to Gen 3.

Architecture Differences

The architectural divide between these two processors is substantial. The Xeon E3-1535M v5 is built on Intel’s 14 nm Skylake-H architecture, featuring a die size of 122 mm² and containing 2,300 million transistors. The i7-1180G7 uses the newer 10 nm Tiger Lake-U architecture with Willow Cove cores, and its die size is 144 mm²; notably, the Fact Pack does not list a transistor count for the i7. The Xeon’s cache hierarchy is smaller per core, with 64 KB of L1 and 256 KB of L2 per core, plus a shared 8 MB L3 cache. The i7 has a larger per-core footprint: 80 KB of L1 and a substantial 1.25 MB of L2 per core, along with a shared 12 MB L3 cache.

Memory support differs significantly. The Xeon supports both DDR3 and DDR4 memory in a dual-channel configuration, with a memory bandwidth of 34.1 GB/s. The i7 is restricted to LPDDR4X, also dual-channel, but achieves the same 34.1 GB/s bandwidth figure. The Xeon includes ECC memory support, a critical feature for data integrity in server and workstation environments, while the i7 lacks this capability. The integrated graphics also differ: the Xeon has the older HD Graphics P530, while the i7 features the Iris Xe-LP Graphics G7 with 96 execution units, which is a far more capable integrated solution. The i7’s PCIe implementation is newer (Gen 4) but provides only 4 lanes from the CPU, whereas the Xeon offers 16 lanes of PCIe Gen 3. The Xeon uses the Intel BGA 1440 socket, while the i7 uses the newer Intel BGA 1598.

Head-to-Head Benchmarks

The benchmark results are notable for their consistency. In Cinebench R15 multicore, the Xeon scores 677 against the i7’s 672, a 0.7% lead. In single-core, the Xeon scores 95 versus 94, a 1.1% lead, which is the largest delta in the entire comparison. Moving to Cinebench R20, the Xeon again leads in multicore with 2824 against 2802 (0.8% delta) and in single-core with 398 against 395 (0.8% delta). The pattern holds in Cinebench R23, where the Xeon posts 6726 in multicore versus 6672 (0.8% delta) and 949 in single-core versus 942 (0.7% delta).

These numbers tell a clear story: the Xeon’s advantage is real but extremely narrow. A 0.7-1.1% difference is within run-to-run variance for many benchmark suites, meaning that in real-world applications, users would be hard-pressed to notice any difference. The i7’s much higher boost clock of 4.60 GHz compared to the Xeon’s 3.70 GHz helps it close the gap against the older architecture, but the Xeon’s higher base clock of 2.90 GHz versus the i7’s 1.30 GHz suggests it maintains a more consistent performance level under sustained loads. The i7’s architectural advantages—larger caches and a newer process node—are evidently enough to nearly nullify the Xeon’s lead, but not quite enough to overtake it.

Specification Differences

The two processors differ in almost every key specification except for core count, thread count, and memory bandwidth. The TDP is the most dramatic difference: the Xeon is rated at 45 watts, while the i7 sips power at just 9 watts. The base clocks are also starkly different, with the Xeon at 2.90 GHz and the i7 at a much lower 1.30 GHz, though the i7’s boost clock of 4.60 GHz exceeds the Xeon’s 3.70 GHz. The process nodes differ, with the Xeon on 14 nm and the i7 on 10 nm. The die sizes are 122 mm² for the Xeon and 144 mm² for the i7, while transistor counts are listed only for the Xeon at 2,300 million. Cache configurations differ in both per-core and shared amounts. Memory support diverges, with the Xeon accepting DDR3 and DDR4 while the i7 is limited to LPDDR4X. ECC memory is supported only on the Xeon. The PCIe versions and lane counts differ (Gen 3 with 16 lanes versus Gen 4 with 4 lanes). The integrated graphics are different models. The sockets are different, and the release dates are over five years apart, with the Xeon launching in 2015 and the i7 in 2021. The launch MSRP for the Xeon is $623, while the i7 lists at $426.

FAQ

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

A: The Xeon E3-1535M v5 wins all three multi-core Cinebench tests, scoring 677, 2824, and 6726 in R15, R20, and R23 respectively. The i7-1180G7 trails by margins of 0.7-0.8% in each test.

Q: How does the single-core performance compare?

A: The Xeon leads in all three single-core tests as well, with scores of 95, 398, and 949 in R15, R20, and R23. The i7 scores 94, 395, and 942, with the Xeon’s largest margin being 1.1% in R15.

Q: Does the i7-1180G7 support ECC memory?

A: No. The Fact Pack lists ECC memory support as true for the Xeon E3-1535M v5 and false for the Core i7-1180G7.

Q: What are the TDP ratings for these two chips?

A: The Xeon E3-1535M v5 is rated at 45 watts, while the Core i7-1180G7 is rated at 9 watts. This is a five-fold difference in thermal design power.

Q: Which processor has a higher boost clock?

A: The Core i7-1180G7 has a significantly higher boost clock of 4.60 GHz, compared to the Xeon’s 3.70 GHz. However, the Xeon has a much higher base clock of 2.90 GHz versus the i7’s 1.30 GHz.

Q: How do their average benchmark scores compare to other CPUs?

A: The Xeon has an average benchmark score of 1945 and sits in the 44th percentile of all CPUs. The i7 has an average score of 1930 and sits in the 43rd percentile. The Xeon’s nearest rival is the Xeon E3-1230 v5 with a 0.1% difference, while the i7’s nearest rival is the AMD Opteron 6348 with a 0.0% difference.

The Verdict

The data paints a picture of two processors that are functionally equivalent in raw compute performance but radically different in platform suitability. The Xeon E3-1535M v5 is the nominal benchmark winner, taking all six head-to-head comparisons with margins between 0.7% and 1.1%. For users who require ECC memory support, a 16-lane PCIe Gen 3 connection, or the reliability connotations of a server/workstation chip, the Xeon is the clear choice from a feature standpoint. Its higher base clock of 2.90 GHz also suggests more stable sustained performance, and its 45-watt TDP indicates it is designed for systems with active cooling.

The Core i7-1180G7, despite losing every benchmark, delivers essentially the same performance at a 9-watt TDP. This is a remarkable efficiency achievement. The i7 is the obvious pick for ultrathin and fanless designs where power consumption and heat dissipation are the primary constraints. Its Iris Xe-LP Graphics G7 with 96 execution units is a far superior integrated GPU, making it more suitable for light graphics work or media consumption without a discrete card. The i7’s support for PCIe Gen 4, even with fewer lanes, offers newer connectivity options. The choice is not about which chip is faster—the data shows they are effectively tied—but about which platform features matter more. The Xeon wins on ECC and lane count; the i7 wins on power efficiency, graphics, and a newer memory type in LPDDR4X.