Intel Core i3-6300 vs Intel Xeon X5570 Comparison

The Intel Core i3-6300 and the Intel Xeon X5570 represent two very different eras and philosophies of Intel silicon: a modest dual-core desktop part from the 14 nm Skylake generation facing a quad-core server processor built on a 45 nm Nehalem-derived design codenamed Gainestown. The recorded data shows a clean sweep for the newer chip across every head-to-head benchmark in the database, with margins clustered tightly around 20 percent. Both parts sit at the 26th percentile versus all CPUs in the database, and their average benchmark scores are nearly identical, 978 for the i3-6300 versus 967 for the X5570, which makes this pairing an instructive case of how aggregate scores can mask per-test differences.

Head-to-Head Benchmarks

Every recorded head-to-head test goes to the Core i3-6300, and the margins are remarkably consistent. In Cinebench R15 multi-core the i3-6300 scores 340 against 283 for the X5570, a 20.1 percent lead. Cinebench R20 multi-core tells the same story: 1419 versus 1180, a 20.3 percent gap. The R23 multi-core result extends the pattern, 3380 against 2810, again 20.3 percent in favor of the Skylake part.

The single-core results are the most analytically interesting. The i3-6300 posts 200 in R20 single-core and 477 in R23 single-core, beating the X5570's 166 and 396 by 20.5 percent in both tests. That the single-core and multi-core gaps are nearly identical is notable: the Xeon's doubled core count (4 cores, 8 threads versus 2 cores, 4 threads) buys it essentially nothing against the newer architecture. A 3.80 GHz base clock with no boost tier, sustained across the i3's two cores, plus the per-clock efficiency of Skylake, more than offsets the Xeon's advantage in physical cores. The Xeon's maximum turbo of 3.33 GHz is not enough to close the per-thread deficit, and the aggregate data confirms it: 5 wins for the i3-6300, 0 for the X5570.

The Verdict

The data makes this a straightforward call for general compute. Anyone choosing between these two parts for rendering, desktop workloads, or any threaded application recorded in the database should pick the Core i3-6300: it wins every measured test by roughly 20 percent. It also does so with a much lower thermal envelope, 51 W TDP against 95 W for the Xeon, which matters for cooling requirements and platform efficiency even though it is not reflected directly in the benchmark scores.

The Xeon X5570 retains two arguments from the spec sheet. First, it supports ECC memory, which the i3-6300 does not, a meaningful consideration for workstation or server roles where memory integrity is required. Second, it offers triple-channel DDR3 with 32.0 GB/s of memory bandwidth, essentially matching the i3's dual-channel DDR4 at 34.1 GB/s despite being a far older memory standard. It also carries an 8 MB shared L3 cache, double the i3's 4 MB. However, its socket 1366 platform is end-of-life, and its launch MSRP of $1386 positioned it as a premium part, while the i3-6300 remains listed as active in Intel Socket 1151. On raw performance data alone, the i3-6300 is the correct pick.

Architecture Differences

The generational gap between these parts is wide. The Core i3-6300 is a Skylake design on Intel's 14 nm process, with 1,400 million transistors on a 150 mm² die. The Xeon X5570 is a Gainestown implementation of the Nehalem architecture on 45 nm, with 731 million transistors spread across a larger 263 mm² die. The transistor density advantage of the newer node is clear from these figures.

Core and cache configurations diverge sharply. The i3-6300 pairs 2 cores with 4 threads, 64 KB of L1 per core, 256 KB of L2 per core, and 4 MB of shared L3. The X5570 runs 4 cores with 8 threads, identical per-core L1 and L2 sizes, but a doubled 8 MB shared L3. Memory support also differs: the i3 takes DDR4 in dual-channel at 34.1 GB/s, while the Xeon takes DDR3 in triple-channel at 32.0 GB/s with ECC support. On interconnect, the i3 offers PCIe Gen 3 with 16 CPU lanes versus the Xeon's PCIe Gen 2. The i3 also integrates Intel HD 530 graphics; the X5570 has no integrated GPU at all, requiring discrete graphics. Neither part has an unlocked multiplier, so neither offers official overclocking headroom. Release dates frame the comparison: the X5570 launched in 2009 as a server/workstation part, the i3-6300 in 2015 as a desktop part.

FAQ

Q: Does the Xeon X5570's extra core count help it win any benchmark?

A: No. Despite having 4 cores and 8 threads versus the i3-6300's 2 cores and 4 threads, the X5570 loses every head-to-head test by roughly 20 percent, including all multi-core runs.

Q: How close are these two in overall database ranking?**

A: Very close. Both sit in the 26th percentile versus all CPUs, with average benchmark scores of 978 for the i3-6300 and 967 for the X5570, a difference of about 1 percent that hides the i3's clean sweep of direct comparisons.

Q: Which CPUs are the nearest rivals of each part?**

A: The i3-6300's nearest rivals are the Intel Core i5-5257U (976 average, 0.2 percent delta), the Intel Core i3-4150T and i3-4130 (both 975, 0.3 percent), and the AMD Athlon X4 840 (975, 0.3 percent). The X5570's closest peers are the AMD Ryzen 7 3700U (968), Intel Celeron N5100 (966), Intel Core i5-2400S (968), and AMD PRO A8-9600 (971).

Q: Which chip supports ECC memory?**

A: Only the Xeon X5570. The Core i3-6300 does not support ECC, which is the main workstation-relevant feature the Xeon retains.

Q: How do power draw and platform status compare?**

A: The i3-6300 has a 51 W TDP and an active production status on Socket 1151. The X5570 has a 95 W TDP and is end-of-life on Socket 1366.

Q: Do both chips have integrated graphics?**

A: No. The i3-6300 includes Intel HD 530 graphics; the X5570 has no integrated GPU and requires a discrete graphics card.

Where Each One Wins

The Core i3-6300 wins every measured performance scenario: Cinebench R15 multi-core (340 to 283), R20 multi-core (1419 to 1180), R20 single-core (200 to 166), R23 multi-core (3380 to 2810), and R23 single-core (477 to 396). Workloads that favor fast individual threads, such as lightly threaded desktop applications, fall firmly in its column given its consistent 20.5 percent single-core lead. Modern platform features, PCIe Gen 3 with 16 CPU lanes, DDR4 support, integrated HD 530 graphics, and a lower 51 W thermal envelope, all reinforce its position as the practical choice from this dataset.

The Xeon X5570's wins are structural rather than measured. It is the only option of the two with ECC memory support, the only one with an 8 MB shared L3 cache, and it delivers triple-channel bandwidth of 32.0 GB/s on DDR3, nearly matching the i3's newer DDR4 platform. Its 4 cores and 8 threads also give it the larger logical footprint, even though the recorded benchmarks show that advantage does not translate into wins. For memory-integrity-sensitive roles on legacy Socket 1366 infrastructure, the X5570 remains the relevant part; for everything else the database measures, the i3-6300 is decisively ahead.