Intel Core i5-1155G7 vs Intel Xeon E5-2643 v3 Comparison

The Intel Xeon E5-2643 v3 and Intel Core i5-1155G7 represent two distinct endpoints in Intel’s product stack: a 2014 server/workstation processor built on the Haswell-EP architecture and a 2021 mobile chip based on Tiger Lake. Despite the seven-year gap, their average benchmark scores are remarkably close—the Xeon posts 2511, while the Core i5 posts 2496, a difference of just 0.6%. Both sit at the 49th percentile among all CPUs. The head-to-head data, however, shows a consistent pattern: the Xeon wins all six Cinebench tests, with margins ranging from 6.4% to 7.0%. This makes the comparison less about raw speed and more about architectural trade-offs, multi-threaded efficiency versus single-core agility, and platform-level capabilities that the benchmark scores alone do not capture.

Head-to-Head Benchmarks

The Xeon E5-2643 v3 wins every single benchmark in the head-to-head comparison, but the margins are narrow and uniform. In Cinebench R15 multi-core, the Xeon scores 875 against the Core i5’s 822, a 6.4% lead. Single-core R15 shows a similar story: 123 versus 115, a 7.0% advantage for the Xeon. Moving to Cinebench R20, the Xeon’s multi-core score of 3646 beats the Core i5’s 3425 by 6.5%, while single-core R20 sees the Xeon at 514 against 483, another 6.4% gap. In Cinebench R23, the pattern holds: multi-core scores are 8682 for the Xeon and 8155 for the Core i5, a 6.5% lead, and single-core scores are 1225 versus 1151, also 6.4% ahead.

What stands out is the consistency of the delta. Across six tests, the Xeon’s advantage never drops below 6.4% or rises above 7.0%. This suggests the performance difference is systemic rather than workload-specific. The Xeon’s higher base clock of 3.40 GHz compared to the Core i5’s 2.50 GHz contributes, but the Core i5’s boost clock of 4.50 GHz is substantially higher than the Xeon’s 3.70 GHz. The fact that the Xeon still wins single-core tests—where boost clocks typically matter most—indicates that the older architecture’s per-core efficiency at its maximum frequency is not the deciding factor. Instead, the Xeon’s 6 cores and 12 threads versus the Core i5’s 4 cores and 8 threads likely provide a structural advantage that carries through all Cinebench versions, which are known to scale with core counts.

In terms of the wider competitive field, the Xeon’s nearest rivals include the Intel Xeon E-2144G with an average score of 2514 (0.1% ahead) and the Intel Xeon E5-2630 v3 at 2507 (0.2% behind). The Core i5-1155G7 itself is listed as a rival to the Xeon with a 0.6% delta. For the Core i5, its nearest rival is the Intel Core i5-9500T at 2493 (0.1% ahead), followed by the Xeon E5-2630 v3 at 2507 (0.4% ahead) and the Xeon E5-2643 v3 at 2511 (0.6% behind). These numbers place both processors in a tight cluster where no single score dominates, yet the head-to-head tests show the Xeon with a clear, repeatable edge.

Where Each One Wins

The Xeon E5-2643 v3 wins every head-to-head benchmark, so the win-split is straightforward: it wins 6 out of 6 tests. The Core i5-1155G7 wins zero. But this does not mean the Core i5 is without merit—it simply excels in areas the Cinebench suite does not measure. The Core i5’s integrated graphics, Iris Xe-LP Graphics G7 80EU, is a feature the Xeon lacks entirely, as the server chip has no integrated graphics. For systems that need display output without a discrete GPU, the Core i5 is the only option of the two.

The Core i5 also carries a much lower thermal design power at 28 watts versus the Xeon’s 135 watts. This makes the Core i5 suitable for thin-and-light mobile devices, whereas the Xeon requires a substantial cooling solution and power delivery infrastructure typical of a server or workstation motherboard. The data shows the Xeon’s memory bandwidth is 68.3 GB/s with quad-channel DDR4 support, while the Core i5’s memory bandwidth is not listed—but it uses dual-channel DDR4 or LPDDR4X, which inherently limits bandwidth compared to a quad-channel design. For memory-intensive server workloads, the Xeon’s platform advantages are clear.

The Core i5’s higher boost clock of 4.50 GHz suggests it can handle short, bursty single-threaded tasks well, even though the Cinebench single-core results show it trailing. Its 10 nm process node versus the Xeon’s 22 nm node means it achieves its performance at a fraction of the power. The Xeon, by contrast, is end-of-life, while the Core i5 is active in production. For a user building a new system today, the Core i5’s availability and modern platform support are practical advantages, even if its Cinebench scores are lower.

Architecture Differences

The architectural gap between these two processors is substantial. The Xeon E5-2643 v3 uses the Haswell-EP architecture on a 22 nm process, with a die size of 356 mm² and 2,600 million transistors. It has 6 cores and 12 threads, with 64 KB of L1 cache per core, 256 KB of L2 per core, and a shared 20 MB L3 cache. The Core i5-1155G7 uses the Tiger Lake architecture (specifically Willow Cove-U) on a 10 nm process, with a die size of 144 mm². It has 4 cores and 8 threads, with 80 KB of L1 per core, 1.25 MB of L2 per core, and a shared 8 MB L3 cache. The transistor count for the Core i5 is not listed, but the smaller die and newer node suggest a higher density.

Memory support differs significantly. The Xeon supports DDR4 with a quad-channel memory bus and a listed bandwidth of 68.3 GB/s, along with ECC memory support. The Core i5 supports DDR4 and LPDDR4X with a dual-channel bus, no ECC support, and no listed bandwidth figure. The Xeon’s PCIe implementation is Gen 3 with 40 lanes (CPU only), while the Core i5 offers Gen 4 with 16 lanes (CPU only). The Xeon’s socket is Intel Socket 2011-3, designed for server and workstation motherboards, while the Core i5 uses Intel BGA 1449, a soldered mobile package.

The Xeon’s release date is September 2014, with a launch MSRP of $1552. The Core i5’s release date is May 2021, with a launch MSRP of $309. Neither processor has an unlocked multiplier. The Xeon’s market segment is server/workstation, while the Core i5 is mobile. The Xeon is end-of-life, while the Core i5 is active. These are not just different chips—they are different product categories that happen to align closely in average benchmark scores.

FAQ

Q: Which processor has a higher single-core score in Cinebench R23?

A: The Intel Xeon E5-2643 v3 scores 1225 in Cinebench R23 single-core, which is 6.4% higher than the Intel Core i5-1155G7’s 1151.

Q: Does the Core i5-1155G7 support ECC memory?

A: No. The Core i5-1155G7 does not support ECC memory, while the Xeon E5-2643 v3 does support ECC memory.

Q: What is the difference in multi-core performance between the two in Cinebench R20?

A: The Xeon E5-2643 v3 scores 3646 in Cinebench R20 multi-core, while the Core i5-1155G7 scores 3425. The Xeon leads by 6.5%.

Q: Which processor has a higher boost clock?

A: The Core i5-1155G7 has a boost clock of 4.50 GHz, which is higher than the Xeon E5-2643 v3’s boost clock of 3.70 GHz.

Q: How do their average benchmark scores compare?

A: The Xeon E5-2643 v3 has an average benchmark score of 2511, while the Core i5-1155G7 has an average score of 2496. The Xeon is 0.6% ahead.

Q: Does the Xeon E5-2643 v3 have integrated graphics?

A: No. The Xeon E5-2643 v3 has no integrated graphics. The Core i5-1155G7 includes Iris Xe-LP Graphics G7 80EU.

The Verdict

The data is unambiguous: the Intel Xeon E5-2643 v3 outperforms the Intel Core i5-1155G7 in every Cinebench test, with margins between 6.4% and 7.0%. It wins 6 out of 6 head-to-head benchmarks, and its average score of 2511 places it 0.6% above the Core i5’s 2496. For any user whose priority is raw multi-threaded or single-threaded rendering performance as measured by Cinebench, the Xeon is the correct choice. Its 6 cores and 12 threads, combined with a 20 MB L3 cache and quad-channel memory bandwidth of 68.3 GB/s, provide a structural advantage that the Core i5’s higher boost clock cannot overcome.

The Core i5-1155G7, however, is not without a case. Its 28-watt TDP versus the Xeon’s 135 watts makes it suitable for mobile systems where power and thermal limits are binding constraints. It includes integrated graphics, which the Xeon lacks entirely. Its 10 nm process node and active production status mean it is a current product, while the Xeon is end-of-life. The Core i5 also supports PCIe Gen 4, which is a newer standard than the Xeon’s Gen 3. For a modern laptop, the Core i5 is the only viable option of the two.

The decision comes down to platform. If the workload is a server or workstation with adequate cooling and power, the Xeon’s benchmark dominance makes it the clear winner. If the system is a mobile device requiring low power and integrated graphics, the Core i5 wins by default. The numbers show a 6.4% to 7.0% performance gap in favor of the Xeon, but the architectural differences—process node, TDP, memory channels, and graphics—create a separation that benchmark scores alone do not resolve. Both processors are at the 49th percentile, and their average scores are within 0.6% of each other. The Xeon is the faster chip; the Core i5 is the more modern and efficient one.