Intel Core i3-7300 vs Intel Xeon E5-2603 v3 Comparison

Head-to-Head Benchmarks

The benchmark data presents a surprisingly one-sided picture. Across every recorded Cinebench test, the Intel Core i3-7300 outperforms the Intel Xeon E5-2603 v3, despite the Xeon having three times the physical cores. The head-to-head results show the i3-7300 winning all five benchmark comparisons, with wins ranging from 20.1% to 20.6% depending on the workload.

In Cinebench R15 multicore, the i3-7300 scores 388 against the Xeon's 323, a 20.1% advantage. The R20 multicore test shows a similar pattern: 1619 for the i3-7300 versus 1346 for the Xeon, a 20.3% margin. Moving to Cinebench R23 multicore, the i3-7300 records 3856 while the Xeon manages 3207, a 20.2% lead. The single-core results are equally decisive. In R20 single-core, the i3-7300 posts 228 against 189, a 20.6% advantage, and in R23 single-core, the gap is 20.4% with scores of 544 and 452 respectively.

What makes this interesting is the core count disparity. The Xeon E5-2603 v3 packs six cores, yet it cannot overcome the i3-7300's two cores in any threaded workload. The data suggests that raw core count does not automatically translate into performance superiority. The i3-7300's higher clock speed appears to be the dominant factor, as its base clock of 4.00 GHz far exceeds the Xeon's 1600.00 MHz base clock.

The average benchmark scores reinforce this trend. The i3-7300 has an average benchmark score of 1115, while the Xeon E5-2603 v3 sits at 1103. This places both processors in the 31st percentile among all CPUs in the database, indicating they occupy a similar overall performance tier despite their architectural differences.

Where Each One Wins

The i3-7300 wins in every benchmark category recorded. This includes both single-threaded and multi-threaded workloads, which is notable given the Xeon's six-core configuration. The i3-7300's wins are remarkably consistent, hovering around the 20% mark across all tests. This consistency suggests a systematic advantage rather than workload-specific strengths.

The Xeon E5-2603 v3 does not win any of the head-to-head benchmark comparisons. Its strengths lie elsewhere, in features not captured by Cinebench scores. The Xeon supports ECC memory, a feature entirely absent from the i3-7300. It also offers quad-channel memory support with a theoretical bandwidth of 51.2 GB/s, compared to the i3-7300's dual-channel 38.4 GB/s. These capabilities matter for server and workstation environments where data integrity and memory throughput are critical.

The i3-7300, by contrast, includes integrated graphics with Intel HD 630, which the Xeon lacks entirely. This makes the i3-7300 more suitable for systems without a discrete GPU. The i3-7300 also has a lower TDP of 51 watts versus the Xeon's 85 watts, indicating lower power draw under load.

Architecture Differences

The two processors come from different Intel generations and manufacturing processes. The i3-7300 uses Kaby Lake architecture built on a 14 nm process, while the Xeon E5-2603 v3 uses Haswell-EP architecture on a 22 nm process. This process node difference partially explains the i3-7300's efficiency and clock speed advantages.

The core configurations diverge significantly. The i3-7300 has 2 cores and 4 threads, enabling simultaneous multithreading. The Xeon E5-2603 v3 has 6 cores and 6 threads, with no hyper-threading support. Despite having triple the cores, the Xeon's lower clock speed limits its throughput in the tested workloads.

Cache configurations also differ substantially. Both processors have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The shared L3 cache, however, tells a different story: the i3-7300 has 4 MB shared, while the Xeon offers 15 MB shared. This larger cache pool could benefit the Xeon in certain server workloads, though the benchmark data does not reflect this advantage.

The Xeon's transistor count is listed at 2,600 million with a die size of 356 mm², reflecting its more complex server-oriented design. The i3-7300 does not have transistor or die size data recorded. The Xeon also supports a broader PCIe configuration with 40 lanes (Gen 3), compared to the i3-7300's 16 lanes. Both support DDR4 memory, but the Xeon's quad-channel interface gives it a memory bandwidth advantage.

FAQ

Q: Why does the Core i3-7300 beat the Xeon E5-2603 v3 in multicore tests despite having fewer cores?

A: The i3-7300's base clock of 4.00 GHz is substantially higher than the Xeon's 1600.00 MHz. This clock advantage more than compensates for the Xeon's additional four physical cores in the recorded Cinebench workloads.

Q: Does the Xeon E5-2603 v3 have any performance advantage over the i3-7300?

A: According to the head-to-head data, no. The Xeon loses all five benchmark comparisons by margins between 20.1% and 20.6%. Its advantages are in features like ECC memory support and quad-channel memory bandwidth, not raw benchmark scores.

Q: Which processor has better memory support?

A: The Xeon E5-2603 v3 supports quad-channel DDR4 with a theoretical bandwidth of 51.2 GB/s, while the i3-7300 uses dual-channel DDR4 at 38.4 GB/s. The Xeon also supports ECC memory, which the i3-7300 does not.

Q: Are both processors in the same performance percentile?

A: Yes, both are in the 31st percentile among all CPUs in the database. Their average benchmark scores are very close: 1115 for the i3-7300 and 1103 for the Xeon.

Q: Does the Xeon have integrated graphics?

A: No, the Xeon E5-2603 v3 has no integrated graphics. The i3-7300 includes Intel HD 630 graphics, making it a self-contained solution for systems without discrete GPUs.

Q: What is the production status of each processor?

A: The i3-7300 is listed as active, while the Xeon E5-2603 v3 is end-of-life. The Xeon was released in 2014, while the i3-7300 came in 2017.

The Verdict

The data points to a clear winner for general performance: the Intel Core i3-7300. It outperforms the Xeon E5-2603 v3 by roughly 20% across all recorded Cinebench tests, both single-core and multi-core. Its higher clock speed, newer architecture, and lower TDP make it the more capable processor for the workloads represented in these benchmarks.

The Xeon E5-2603 v3's case rests on features outside the benchmark suite. ECC memory support, quad-channel memory bandwidth, and a larger 15 MB L3 cache make it suited for server and workstation roles where data reliability and memory throughput matter more than raw Cinebench scores. Its 40 PCIe lanes also provide more expansion capability than the i3-7300's 16 lanes.

Users building a desktop system with integrated graphics needs should choose the i3-7300. Its Intel HD 630 GPU eliminates the need for a separate graphics card. Those running memory-intensive server applications requiring ECC should consider the Xeon, despite its lower benchmark scores. The i3-7300's 4.00 GHz base clock and 51 watt TDP make it a compelling choice for everyday computing, while the Xeon's six cores and 85 watt TDP serve a different, more specialized purpose.

Specification Differences

| Specification | Intel Core i3-7300 | Intel Xeon E5-2603 v3 |

|----------------|---------------------|------------------------|

| Cores | 2 | 6 |

| Threads | 4 | 6 |

| Base Clock | 4.00 GHz | 1600.00 MHz |

| TDP | 51 W | 85 W |

| Socket | Intel Socket 1151 | Intel Socket 2011-3 |

| Architecture | Kaby Lake | Haswell |

| Process Node | 14 nm | 22 nm |

| L3 Cache | 4 MB (shared) | 15 MB (shared) |

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 38.4 GB/s | 51.2 GB/s |

| ECC Memory | No | Yes |

| PCIe Lanes | 16 (Gen 3) | 40 (Gen 3) |

| Integrated Graphics | Intel HD 630 | None |

| Market Segment | Desktop | Server/Workstation |

| Production Status | Active | End-of-life |

| Release Date | 2017-01-02 | 2014-09-07 |

| Launch MSRP | None | $213 |

| Part Number | SR359 | SR20A |

| Transistors | Not recorded | 2,600 million |

| Die Size | Not recorded | 356 mm² |