Intel Processor U300 vs Intel Xeon E5-2620 v3 Comparison

The Intel Xeon E5-2620 v3 and the Intel Processor U300 occupy opposite ends of the computing spectrum, yet their benchmark records show a surprisingly close overall standing. The database places both processors at the 43rd percentile among all CPUs, with average benchmark scores of 1907 and 1881 respectively. That near-parity masks a stark split in workload behavior: the older server chip dominates in one multi-threaded test, while the newer mobile part wins every single-core test and one multi-core test. The data shows two very different designs that happen to land at similar average scores, but for entirely different reasons.

Head-to-Head Benchmarks

The most lopsided result in the recorded tests is the Cinebench R15 single-core run. The Intel Processor U300 scores 222 against the Xeon E5-2620 v3’s 93, a delta of 58.1 percent. That is not a marginal gap; it is a generational leap. The U300’s Raptor Lake architecture, with its high boost clock, simply overwhelms the Haswell-era Xeon in lightly threaded work. The R15 multi-core test also goes to the U300, scoring 781 versus 664, a 15 percent advantage. Despite having fewer cores and threads (5 cores, 6 threads versus 6 cores, 12 threads), the U300 still manages to outrun the Xeon in this older rendering benchmark.

The picture flips completely in Cinebench R23. The Xeon E5-2620 v3 posts a multi-core score of 6595, which is 34.5 percent ahead of the U300’s 4905. This is the largest win for either processor in any test. The Xeon’s extra threads and larger shared L3 cache (15 MB versus 8 MB) pay off when the workload scales across all available execution units. However, in R23 single-core, the U300 answers back with 1616 against the Xeon’s 931, a 42.4 percent margin. So the head-to-head record shows three wins for the U300 (R15 multi, R15 single, R23 single) and one win for the Xeon (R23 multi). The average benchmark score, however, tells a different story: the Xeon’s 1907 average edges out the U300’s 1881, reflecting that the Xeon’s R23 multi-core result carries more weight in the aggregate.

Where Each One Wins

The Intel Processor U300 is the clear choice for single-threaded performance. Its R15 single-core score of 222 is more than double the Xeon’s 93, and its R23 single-core score of 1616 is 73.6 percent higher. Any workload that relies on one or two fast cores, such as older games, basic office tasks, or lightly threaded productivity applications, will favor the U300. Its boost clock of 4.40 GHz, recorded in the database, is the driving factor. The U300 also wins the R15 multi-core test, suggesting it can handle modest parallel loads without issue, despite its smaller core count.

The Intel Xeon E5-2620 v3 wins the most demanding multi-threaded scenario in the dataset: Cinebench R23 multi-core. Its score of 6595 versus 4905 represents a 34.5 percent lead. This points to sustained all-core rendering, video encoding, or scientific computing where 12 threads and a 15 MB shared L3 cache provide an advantage. The Xeon also supports ECC memory and quad-channel DDR4 with a recorded memory bandwidth of 59.7 GB/s, which are server-oriented features that matter in reliability-focused environments. The U300 offers no ECC support and uses dual-channel memory with no bandwidth figure recorded.

Architecture Differences

The two processors come from entirely different eras and design philosophies. The Xeon E5-2620 v3 uses the Haswell-EP architecture on a 22 nm process node, with a die size of 356 mm² and 2,600 million transistors. It is built for the Intel Socket 2011-3 platform, a server/workstation socket with 40 PCIe Gen 3 lanes (CPU only). Its base clock is 2.40 GHz with a boost clock of 3.20 GHz, and it carries 6 cores and 12 threads. The cache layout is 64 KB L1 per core, 256 KB L2 per core, and 15 MB shared L3. Memory support is DDR4 in quad-channel configuration, with ECC enabled. The integrated graphics field is null, meaning it has no built-in GPU.

The Intel Processor U300 uses Raptor Lake-U architecture on a 10 nm process node, with no transistor or die size data recorded. It fits the Intel BGA 1744 socket, a mobile platform with 8 PCIe Gen 4 lanes (CPU only). Its base clock is listed as 1200.00 MHz (which is 1.20 GHz) with a boost clock of 4.40 GHz. It has 5 cores and 6 threads, a hybrid design typical of Raptor Lake, though the database does not break down performance versus efficiency cores. Cache is 80 KB L1 per core, 1.25 MB L2 per core, and 8 MB shared L3. Memory support covers both DDR4 and DDR5 in dual-channel mode, with no ECC. The U300 includes integrated graphics, specifically UHD Graphics 48EU, which the Xeon lacks entirely.

The process node difference is significant: 22 nm versus 10 nm. That alone explains much of the power and clock behavior. The Xeon’s TDP is 85 watts, while the U300’s is 15 watts. Despite the massive TDP gap, the U300 still wins most benchmarks, which speaks to the efficiency of the newer architecture. The Xeon’s release date is September 2014, and it is marked end-of-life. The U300’s release date is January 2023, and it is active. The Xeon’s launch MSRP is $417; the U300’s is $193. Neither processor has an unlocked multiplier.

FAQ

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

A: The Intel Processor U300 scores 1616 in Cinebench R23 single-core, while the Intel Xeon E5-2620 v3 scores 931. That is a 42.4 percent advantage for the U300.

Q: Why does the Xeon win the R23 multi-core test despite having fewer benchmark wins overall?

A: The Xeon E5-2620 v3 has 6 cores and 12 threads, compared to the U300’s 5 cores and 6 threads. In Cinebench R23 multi-core, the Xeon scores 6595 versus 4905, a 34.5 percent lead. The extra threads and larger 15 MB shared L3 cache allow it to sustain heavy parallel rendering workloads.

Q: Do both processors support ECC memory?

A: No. The Xeon E5-2620 v3 supports ECC memory with quad-channel DDR4. The Intel Processor U300 does not support ECC and uses dual-channel DDR4 or DDR5.

Q: What is the difference in power consumption?

A: The Xeon E5-2620 v3 has a TDP of 85 watts, while the Intel Processor U300 has a TDP of 15 watts. The U300 is a mobile-class part designed for low power, whereas the Xeon targets server and workstation sockets.

Q: Which processor has integrated graphics?

A: Only the Intel Processor U300 has integrated graphics, listed as UHD Graphics 48EU. The Xeon E5-2620 v3 has no integrated graphics in the database.

Q: How do their average benchmark scores compare?

A: The Xeon E5-2620 v3 has an average benchmark score of 1907, while the Intel Processor U300 has 1881. Both sit at the 43rd percentile among all CPUs, meaning they are statistically similar in aggregate performance.

The Verdict

The data points to a clear split by use case. Choose the Intel Xeon E5-2620 v3 for sustained multi-threaded server or workstation tasks, particularly those that scale beyond 6 threads. Its 34.5 percent lead in Cinebench R23 multi-core, combined with ECC memory support, quad-channel DDR4 bandwidth of 59.7 GB/s, and 40 PCIe Gen 3 lanes, makes it the only option here for memory-heavy, reliability-critical, or high-core-count workloads. The Xeon’s 15 MB shared L3 cache and 12 threads are assets that the U300 cannot match in heavily parallel rendering or computation.

Choose the Intel Processor U300 for everything else. It wins three of the four head-to-head benchmarks, including both single-core tests by margins of 58.1 percent and 42.4 percent. Its 4.40 GHz boost clock delivers responsiveness that the Xeon cannot approach. The U300 also brings integrated graphics, a 15 watt TDP, and PCIe Gen 4 support, which makes it far better suited to mobile or low-power systems. For typical desktop productivity, web browsing, office applications, and lightly threaded software, the U300 is the faster part by a wide margin. The Xeon is not a bad processor, but its era shows in every single-core result. The U300’s average score of 1881 is only 1.4 percent behind the Xeon’s 1907, yet it achieves that while consuming far less power and including a GPU. If the workload fits within 6 threads, the U300 is the better buy. If the workload demands 12 threads and ECC, the Xeon is the only viable choice.

Specification Differences

| Specification | Intel Xeon E5-2620 v3 | Intel Processor U300 |

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

| Cores | 6 | 5 |

| Threads | 12 | 6 |

| Base Clock | 2.40 GHz | 1200.00 MHz (1.20 GHz) |

| Boost Clock | 3.20 GHz | 4.40 GHz |

| TDP | 85 W | 15 W |

| Socket | Intel Socket 2011-3 | Intel BGA 1744 |

| Architecture | Haswell-EP | Raptor Lake-U |

| Process Node | 22 nm | 10 nm |

| Die Size | 356 mm² | Not recorded |

| Transistors | 2,600 million | Not recorded |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 256 KB (per core) | 1.25 MB (per core) |

| L3 Cache | 15 MB (shared) | 8 MB (shared) |

| Memory Support | DDR4 | DDR4, DDR5 |

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

| Memory Bandwidth | 59.7 GB/s | Not recorded |

| ECC Memory | Yes | No |

| PCIe | Gen 3, 40 Lanes (CPU only) | Gen 4, 8 Lanes (CPU only) |

| Integrated Graphics | None | UHD Graphics 48EU |

| Market Segment | Server/Workstation | Mobile |

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

| Release Date | September 2014 | January 2023 |

| Launch MSRP | $417 | $193 |

| Part Number | SR207 | SRMLU |