Intel Core i5-8305G vs Intel Xeon E5-1630 v3 Comparison

The Intel Core i5-8305G and the Intel Xeon E5-1630 v3 are both 4-core, 8-thread processors, but they target profoundly different market segments: the former is a mobile part with integrated graphics, while the latter is a server/workstation chip. Benchmark data shows a clear, consistent performance advantage for the Xeon E5-1630 v3 across all tested workloads, though the margin is surprisingly narrow given their architectural and platform differences. The data shows the Xeon E5-1630 v3 winning all six head-to-head comparisons, with the Core i5-8305G failing to secure a single benchmark victory.

Head-to-Head Benchmarks

The Xeon E5-1630 v3 demonstrates a uniform lead across both Cinebench R15, R20, and R23 tests, with the deltaPct hovering near -9% for the Core i5-8305G in most cases. In Cinebench R15 multicore, the Xeon scores 635 against the i5-8305G’s 578, a 9% deficit for the mobile chip. The single-core R15 test tells a similar story: the Xeon posts 89, while the i5-8305G manages 81, again a -9% difference. This pattern persists in the newer Cinebench R20 suite, where the Xeon’s multicore score of 2647 eclipses the i5-8305G’s 2410 (-9%), and its single-core result of 373 beats 340 (-8.8%). The R23 results reinforce this trend, with the Xeon delivering 6303 multicore and 889 single-core, versus the i5-8305G’s 5739 and 810, respectively, both showing a -8.9% delta.

The consistency of these margins is notable. Across all six tests, the Xeon’s advantage ranges from -8.8% to -9%, indicating that the performance gap is largely driven by a fundamental clock-speed and architecture efficiency difference rather than workload-specific scaling. The i5-8305G’s base clock of 2.80 GHz is substantially lower than the Xeon’s 3.70 GHz, and while both boost to 3.80 GHz, the Xeon maintains a higher sustained frequency floor. In practical terms, the Xeon E5-1630 v3 is roughly 9% faster in every measured Cinebench scenario, which is a meaningful but not overwhelming lead. The i5-8305G does have a Geekbench multicore score of 3536 and a single-core score of 1150, but these cannot be directly compared to the Xeon, as the Xeon’s benchmark list lacks Geekbench results. This absence means the only comparable metrics are the Cinebench tests, where the Xeon is uniformly superior.

Where Each One Wins

The Xeon E5-1630 v3 wins every benchmark category in which they are directly compared, making it the clear choice for compute-heavy tasks that rely on sustained multi-threaded performance. Its Cinebench R15, R20, and R23 multicore victories—635 vs 578, 2647 vs 2410, and 6303 vs 5739—indicate a definitive advantage in rendering and other CPU-bound workloads. The single-core results (89 vs 81, 373 vs 340, 889 vs 810) also favor the Xeon, suggesting it is better suited for lightly-threaded applications like legacy software or gaming that depend on per-core throughput. Given its server/workstation market segment and 140 W TDP, the Xeon is designed for environments where power draw is less constrained, allowing it to sustain higher clocks.

The Core i5-8305G, however, has strengths that are not reflected in the Cinebench scores. Its integrated Radeon RX Vega M GL graphics provide a complete visual solution, eliminating the need for a discrete GPU, which is a critical advantage for compact mobile systems. The data shows the i5-8305G has an active production status, while the Xeon E5-1630 v3 is end-of-life, meaning the i5-8305G is still available for new designs. The i5-8305G also has a significantly lower TDP of 65 W, making it far more suitable for thermally constrained laptops, whereas the Xeon’s 140 W TDP requires robust workstation cooling. For a use case involving portable computing with moderate CPU loads and integrated graphics, the i5-8305G is the only viable option; for raw compute performance in a stationary workstation, the Xeon wins outright.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Core i5-8305G uses the Kaby Lake architecture (specifically Kaby Lake G) on a 14 nm process, while the Xeon E5-1630 v3 is based on the older Haswell architecture (Haswell-EP) on a 22 nm process. This process node difference gives the i5-8305G a density and power efficiency advantage in theory, but the Xeon compensates with a higher base clock and a larger, more robust platform. The Xeon E5-1630 v3 contains 2,600 million transistors on a 356 mm² die, whereas the i5-8305G’s transistor count and die size are not listed in the data, indicating the Xeon is a physically larger and more complex chip.

Cache configurations differ substantially, impacting memory hierarchy performance. The i5-8305G has a 6 MB shared L3 cache, while the Xeon E5-1630 v3 offers a significantly larger 10 MB shared L3 cache. Both have identical per-core L1 (64 KB per core) and L2 (256 KB per core) caches, so the Xeon’s advantage lies entirely in the last-level cache, which can improve performance in workloads with larger working sets. The Xeon also supports ECC memory, a critical feature for error-sensitive server and workstation tasks, while the i5-8305G does not. Memory bandwidth is another differentiator: the Xeon supports quad-channel DDR4 with a rated bandwidth of 68.3 GB/s, while the i5-8305G’s memory bus and bandwidth are not specified, implying a narrower, likely dual-channel implementation. The Xeon further provides PCIe Gen 3 with 40 lanes (CPU only), enabling high-bandwidth expansion, whereas the i5-8305G’s PCIe configuration is not listed.

Specification Differences

The most glaring specification difference is the socket and platform. The i5-8305G uses Intel BGA 2270, a soldered mobile socket, while the Xeon E5-1630 v3 uses Intel Socket 2011-3, a socketed desktop/workstation interface. This dictates that the i5-8305G is permanently attached to a motherboard, while the Xeon is replaceable. Base clocks diverge significantly: the i5-8305G runs at 2.80 GHz, while the Xeon E5-1630 v3 starts at 3.70 GHz; both share the same 3.80 GHz boost clock. The TDPs are dramatically different, with the i5-8305G rated at 65 W versus the Xeon’s 140 W. The i5-8305G includes integrated Radeon RX Vega M GL graphics, while the Xeon E5-1630 v3 has no integrated graphics, requiring a discrete GPU. Memory support is DDR4 for both, but the Xeon adds quad-channel support and ECC capability, while the i5-8305G does not list a memory bus width or ECC support. Their release dates are far apart: the i5-8305G was released on 2018-01-31, while the Xeon E5-1630 v3 was released on 2014-09-07. The production statuses also differ, with the i5-8305G listed as active and the Xeon as end-of-life. The Xeon has a part number (QFSVSR20L), while the i5-8305G does not list one. Neither processor has a launch MSRP or an unlocked multiplier.

FAQ

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

A: The Intel Xeon E5-1630 v3 is faster in all multi-threaded Cinebench tests. It scores 635 in R15 multicore versus the i5-8305G’s 578, 2647 in R20 multicore versus 2410, and 6303 in R23 multicore versus 5739, representing a consistent -9% deficit for the i5-8305G.

Q: Does the Core i5-8305G have any performance advantage over the Xeon?

A: Based on the available benchmark data, no. The i5-8305G wins zero of the six head-to-head comparisons. The Xeon E5-1630 v3 wins all six, including every single-core and multi-core Cinebench test.

Q: Can the Xeon E5-1630 v3 be used in a laptop?

A: No, not practically. The Xeon E5-1630 v3 uses Intel Socket 2011-3, has a 140 W TDP, and is in the server/workstation market segment. The Core i5-8305G uses Intel BGA 2270, a 65 W TDP, and is in the mobile market segment.

Q: What is the cache size difference between the two?

A: Both have 64 KB L1 and 256 KB L2 per core. The key difference is L3 cache: the Core i5-8305G has 6 MB shared, while the Xeon E5-1630 v3 has 10 MB shared.

Q: Which processor supports ECC memory?

A: The Intel Xeon E5-1630 v3 supports ECC memory, while the Intel Core i5-8305G does not. The Xeon also features quad-channel memory with 68.3 GB/s bandwidth, whereas the i5-8305G’s memory bus details are not specified.

Q: Are these processors from the same generation?

A: No. The Core i5-8305G is from the Kaby Lake generation, released on 2018-01-31, while the Xeon E5-1630 v3 is from the Haswell generation, released on 2014-09-07. The i5-8305G is built on a 14 nm process, and the Xeon uses a 22 nm process.