Intel Atom C5125 vs Intel Core i5-1145G7E Comparison

The Intel Core i5-1145G7E and Intel Atom C5125 are both 10 nm Intel processors, but they target different markets. The i5-1145G7E is a mobile chip with 4 cores and 8 threads, a base clock of 1.50 GHz, a boost clock of 4.10 GHz, and a 28 W TDP. The Atom C5125 is a server/workstation part with 8 cores and 8 threads, a base clock of 2.80 GHz, no boost clock, and a 50 W TDP. In the database's Cinebench tests, the i5-1145G7E wins all six benchmarks, with margins between 1.9% and 2.5%. Its average benchmark score is 2174 (47th percentile), while the Atom C5125 averages 2122 (46th percentile).

Head-to-Head Benchmarks

In Cinebench R15 multi-core, the i5-1145G7E scores 757 against the Atom's 739, a 2.4% lead. The single-core test shows 106 vs 104, a 1.9% advantage. Moving to Cinebench R20, the i5 leads 3156 to 3081 in multi-core (2.4%) and 445 to 434 in single-core (2.5%). In Cinebench R23, the i5 posts 7516 vs 7336 in multi-core (2.5%) and 1061 vs 1035 in single-core (2.5%). The i5-1145G7E is consistently ahead, but the gaps are narrow. The largest margin is 2.5% in three tests, and the smallest is 1.9% in R15 single-core. This suggests that the i5's architectural advantages, such as its boost clock and newer Willow Cove cores, outweigh the Atom's higher core count and base clock. The Atom's 8 cores do not translate into a multi-core win, as the i5's 4 cores with hyper-threading manage to outperform it in every multi-threaded test.

The average benchmark scores reinforce this picture. The i5-1145G7E's 2174 average is higher than the Atom's 2122, and the percentile ranks (47 vs 46) place both near the middle of the database, but the i5 holds a slight edge. The i5's nearest rival, the AMD Ryzen 5 3400GE, scores 2175 with a delta of 0%, while the Intel Core i7-1185GRE scores 2178 with a delta of -0.2%. The Atom C5125's nearest rival, the Intel Core i7-1160G7, scores 2124 with a delta of -0.1%, and the AMD Ryzen 5 7520C scores 2127 with a delta of -0.2%. These comparisons show that both CPUs sit in a tight performance band, but the i5 is marginally faster across the board.

Architecture Differences

The i5-1145G7E is built on the Tiger Lake architecture with Willow Cove cores, while the Atom C5125 uses the Parker Ridge platform with Tremont cores. Both are 10 nm parts, but the i5 has a die size of 144 mm², while the Atom's die size is not recorded. The i5 features 80 KB of L1 cache per core and 1.25 MB of L2 per core, plus 8 MB of shared L3. The Atom has 64 KB of L1 per core and 4.5 MB of L2 per module, with no L3 cache. The i5 supports DDR4 and LPDDR4X memory, while the Atom only supports DDR4. The Atom has a memory bandwidth of 46.9 GB/s, while the i5's bandwidth is not listed. The i5 includes integrated Iris Xe Graphics G7 80EU, while the Atom has no integrated graphics. The i5 does not support ECC memory, but the Atom does. The i5 provides PCIe Gen4 with 4 lanes, while the Atom provides PCIe Gen3 with 16 lanes. The i5 has a TDP of 28 W, the Atom 50 W. The i5 uses socket BGA 1449, the Atom BGA 2106. The i5 was released in September 2020, the Atom in June 2022. The i5 has a launch MSRP of $312, the Atom $335.

These differences explain the benchmark results. The i5's Willow Cove cores are designed for higher single-thread performance, and its boost clock of 4.10 GHz gives it a peak frequency advantage over the Atom's fixed 2.80 GHz. The Atom's Tremont cores are more power-efficient per area but lack the same per-core throughput. The absence of L3 cache on the Atom may also limit its ability to share data across cores, while the i5's 8 MB shared L3 helps in multi-threaded workloads. The i5's integrated graphics and lower TDP make it suitable for mobile systems, while the Atom's ECC support and 16 PCIe Gen3 lanes target server and workstation use cases.

FAQ

Q: Which processor has more cores?

A: The Intel Atom C5125 has 8 cores, while the Intel Core i5-1145G7E has 4 cores. Both have 8 threads, but the i5 uses hyper-threading (4 cores, 8 threads) while the Atom has 8 physical cores.

Q: Does the Atom C5125 support ECC memory?

A: Yes, the Atom C5125 supports ECC memory, while the i5-1145G7E does not.

Q: Which CPU has integrated graphics?

A: The i5-1145G7E includes Iris Xe Graphics G7 80EU. The Atom C5125 has no integrated graphics.

Q: What is the memory bandwidth of the Atom C5125?

A: The Atom C5125 has a memory bandwidth of 46.9 GB/s. The i5-1145G7E's memory bandwidth is not listed in the database.

Q: Which processor has a higher boost clock?

A: The i5-1145G7E has a boost clock of 4.10 GHz. The Atom C5125 has no boost clock; its base clock is 2.80 GHz.

Q: Which CPU is newer?

A: The Atom C5125 was released in June 2022, while the i5-1145G7E was released in September 2020.

Specification Differences

| Field | Intel Core i5-1145G7E | Intel Atom C5125 |

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

| Cores | 4 | 8 |

| Threads | 8 | 8 |

| Base Clock | 1.50 GHz | 2.80 GHz |

| Boost Clock | 4.10 GHz | None |

| TDP | 28 W | 50 W |

| Socket | Intel BGA 1449 | Intel BGA 2106 |

| Architecture | Tiger Lake | Parker Ridge |

| Codename | Tiger Lake-U | Parker Ridge |

| Generation | Core i5 (Willow Cove-U) | Atom (Tremont) |

| Die Size | 144 mm² | Not recorded |

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

| L2 Cache | 1.25 MB (per core) | 4.5 MB (per module) |

| L3 Cache | 8 MB (shared) | None |

| Memory Support | DDR4, LPDDR4X | DDR4 |

| Memory Bandwidth | Not recorded | 46.9 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 4, 4 Lanes | Gen 3, 16 Lanes |

| Integrated Graphics | Iris Xe Graphics G7 80EU | N/A |

| Market Segment | Mobile | Server/Workstation |

| Release Date | September 2020 | June 2022 |

| Launch MSRP | $312 | $335 |

| Part Number | SRK0Z | SRL40 |

Where Each One Wins

The i5-1145G7E wins all six Cinebench benchmarks, making it the stronger CPU for rendering and other multi-threaded workloads in this test suite. Its advantages include a boost clock of 4.10 GHz, integrated graphics, a lower TDP of 28 W, and a smaller die size of 144 mm². The Atom C5125, however, is designed for server and workstation environments, offering ECC memory support, 16 PCIe Gen3 lanes, a higher base clock of 2.80 GHz, and 8 physical cores. For mobile or client systems where power efficiency and graphics are important, the i5 is the clear choice. For server deployments that require ECC and more PCIe lanes, the Atom provides features the i5 lacks, even though it trails in Cinebench scores. The i5's higher boost clock and newer core architecture give it a performance edge in both single-threaded and multi-threaded tasks, while the Atom's strengths lie in its connectivity and reliability features rather than raw compute throughput.