Intel Core i3-10305 vs Intel Core i5-1145G7E Comparison

Head-to-Head Benchmarks

The benchmark data is unambiguous: the Intel Core i3-10305 wins every single head-to-head test against the Intel Core i5-1145G7E. Across all six recorded Cinebench workloads, the desktop part holds a consistent advantage between 4.1% and 4.7%. This is not a case of one chip excelling in one scenario and the other in another; the i3-10305 simply outruns its mobile rival everywhere.

The largest margin comes in Cinebench R15 single-core, where the i3-10305 scores 111 against 106, a 4.7% lead. The smallest margin appears in both Cinebench R15 multicore and Cinebench R23 single-core, each with a 4.1% delta. The other three tests, Cinebench R20 multicore, R20 single-core, and R23 multicore, all land at 4.2% or 4.3% in favor of the i3-10305. That consistency is notable: the advantage is not concentrated in one type of workload, it spans both single-threaded and fully threaded rendering.

Looking at absolute scores, the i3-10305 posts 788 in Cinebench R15 multicore versus 757 for the i5-1145G7E. In Cinebench R20 multicore, the gap is 3287 to 3156. In Cinebench R23 multicore, the i3-10305 reaches 7828 while the i5-1145G7E manages 7516. Single-core results follow the same pattern: 464 to 445 in R20 and 1105 to 1061 in R23. The i3-10305 takes all six recorded wins.

Average benchmark scores reinforce the picture. The i3-10305 carries an average score of 2264, which places it at the 47th percentile of all CPUs in the database. The i5-1145G7E averages 2174, also at the 47th percentile. That shared percentile ranking might suggest equivalence, but the raw numbers show the i3-10305 holds a roughly 4% edge in every direct comparison. The nearest rivals for the i3-10305 include the Intel Core i7-1068NG7 at 2259 (0.2% behind), the Intel Core i5-9400 at 2254 (0.4% behind), the Intel Core i7-10710U at 2248 (0.7% behind), and the AMD Ryzen 5 PRO 1500 at 2246 (0.8% behind). The i5-1145G7E sits near the AMD Ryzen 5 3400GE at 2175, the Intel Core i7-1185GRE at 2178, the Intel Core i5-7640X at 2167, and the Intel Core i7-5950HQ at 2158.

The data shows a clean sweep. The i3-10305 wins six benchmarks, the i5-1145G7E wins none. The deltas are modest, all under 5%, but they are uniform. No workload category flips the result.

FAQ

Q: Which processor wins more benchmarks in the database?

A: The Intel Core i3-10305 wins all six recorded head-to-head benchmark comparisons. The Intel Core i5-1145G7E does not win any of the six.

Q: What is the largest performance gap between the two?

A: The largest gap is in Cinebench R15 single-core, where the i3-10305 leads by 4.7% (111 versus 106). The smallest gaps are 4.1%, recorded in both Cinebench R15 multicore and Cinebench R23 single-core.

Q: How do their average benchmark scores compare?

A: The i3-10305 has an average benchmark score of 2264, while the i5-1145G7E has an average score of 2174. Both processors sit at the 47th percentile of all CPUs in the database.

Q: Are both processors still in active production?

A: Yes, both the Intel Core i3-10305 and the Intel Core i5-1145G7E have an active production status in the database.

Q: Do both processors support ECC memory?

A: No. Neither processor supports ECC memory. Both are listed with ECC memory support set to false.

Q: What is the launch MSRP of the i5-1145G7E?

A: The launch MSRP of the Intel Core i5-1145G7E is $312. No launch MSRP is recorded for the i3-10305 in the database.

The Verdict

The benchmark data points to a straightforward conclusion. The Intel Core i3-10305 is the faster processor in every recorded test. It wins all six head-to-head comparisons, with deltas ranging from 4.1% to 4.7%. Its average benchmark score of 2264 exceeds the i5-1145G7E's 2174 by a meaningful margin. Anyone choosing strictly on raw Cinebench performance should select the i3-10305.

The i5-1145G7E is not without its own case, but that case does not rest on benchmark wins. It posts lower scores across the board. Its best result relative to the i3-10305 is a 4.1% deficit in two tests, and its worst is a 4.7% deficit in Cinebench R15 single-core. The data does not show any scenario where the i5-1145G7E pulls ahead.

The i3-10305 also benefits from a higher boost clock of 4.50 GHz compared to 4.10 GHz for the i5-1145G7E. The base clock difference is enormous on paper, 3.80 GHz versus 1500.00 MHz, though the mobile chip's base clock reflects its power-constrained design. The i3-10305 runs at a 65 W TDP, while the i5-1145G7E runs at 28 W. That power difference explains much of the performance gap.

The verdict depends on context. For desktop users with access to a standard ATX platform, the i3-10305 is the clear pick. It delivers higher scores in every benchmark and does so with a more conventional socket. For users needing a mobile processor, the i5-1145G7E is the only option of the two that fits a BGA 1449 board. But the data does not suggest any performance reason to choose it over the i3-10305.

Specification Differences

The two processors differ in several key specifications. The i3-10305 uses the Intel Socket 1200, while the i5-1145G7E uses Intel BGA 1449. The i3-10305 has a base clock of 3.80 GHz and a boost clock of 4.50 GHz; the i5-1145G7E has a base clock of 1500.00 MHz and a boost clock of 4.10 GHz. The thermal design power is 65 W for the i3-10305 and 28 W for the i5-1145G7E.

The process nodes differ: the i3-10305 is built on 14 nm, the i5-1145G7E on 10 nm. The i5-1145G7E has a recorded die size of 144 mm², while the i3-10305 has no die size recorded in the database. Cache configurations also differ. The i3-10305 has 64 KB of L1 cache per core and 256 KB of L2 cache per core. The i5-1145G7E has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core. Both share 8 MB of L3 cache.

Memory support differs as well. The i3-10305 supports DDR4 memory only. The i5-1145G7E supports both DDR4 and LPDDR4X. Both use dual-channel memory buses, but the i3-10305 has a recorded memory bandwidth of 42.7 GB/s while the i5-1145G7E has no bandwidth figure recorded. PCIe support also differs: the i3-10305 has Gen 3 with 16 CPU lanes, while the i5-1145G7E has Gen 4 with 4 CPU lanes.

Integrated graphics are different. The i3-10305 uses UHD Graphics 630, while the i5-1145G7E uses Iris Xe Graphics G7 80EU. The market segments differ: the i3-10305 is a desktop part, the i5-1145G7E is a mobile part. Release dates differ, with the i3-10305 releasing on 2021-03-15 and the i5-1145G7E on 2020-09-01. The i5-1145G7E has a recorded launch MSRP of $312, while no MSRP is recorded for the i3-10305. Neither processor is multiplier unlocked.

Architecture Differences

The architecture gap is substantial. The i3-10305 belongs to Intel's Comet Lake generation, specifically Comet Lake-R, built on a 14 nm process. The i5-1145G7E belongs to the Tiger Lake generation, specifically Tiger Lake-U with Willow Cove cores, built on a 10 nm process. The newer 10 nm node gives the i5-1145G7E a smaller process geometry, though the die size of 144 mm² is recorded only for the i5-1145G7E.

Both processors have 4 cores and 8 threads. Core counts are identical. The cache hierarchy, however, reflects the architectural differences. The i5-1145G7E has larger per-core L1 and L2 caches: 80 KB and 1.25 MB per core, respectively, versus 64 KB and 256 KB per core for the i3-10305. The L3 cache is the same at 8 MB shared. The newer architecture gives the i5-1145G7E more cache per core, but the benchmark results show that does not translate into a performance win.

The memory controllers differ. The i3-10305 supports only DDR4, while the i5-1145G7E supports DDR4 and LPDDR4X. The i3-10305 has a recorded memory bandwidth of 42.7 GB/s, the i5-1145G7E has none recorded. PCIe support is another architectural split: the i3-10305 provides Gen 3 with 16 CPU lanes, the i5-1145G7E provides Gen 4 with 4 CPU lanes.

The integrated graphics represent a major architectural divergence. The i3-10305 pairs its Comet Lake compute cores with UHD Graphics 630. The i5-1145G7E integrates Iris Xe Graphics G7 80EU, a much more capable GPU solution in terms of execution units. The database does not include graphics benchmarks for either chip, so the performance impact of these iGPU differences cannot be quantified here. The fact remains that the i5-1145G7E is the only one of the two with a Gen 4 PCIe interface, but it is limited to 4 lanes.

The TDP difference is also architectural in nature. The i3-10305 is a desktop part with a 65 W TDP, the i5-1145G7E is a mobile part with a 28 W TDP. The lower power envelope of the i5-1145G7E, combined with its much lower base clock of 1500.00 MHz, explains why the newer 10 nm architecture cannot overtake the older, higher-clocked desktop chip in Cinebench tests.

Where Each One Wins

The i3-10305 wins in every benchmark category recorded. That includes single-core and multi-core workloads across Cinebench R15, R20, and R23. The largest single-core margin is 4.7% in R15, and the largest multi-core margin is 4.2% in R20. For users prioritizing raw CPU rendering performance, the i3-10305 is the definitive choice.

The i5-1145G7E does not win any recorded benchmark. Its strengths lie outside the measured Cinebench suite. It has a lower TDP of 28 W versus 65 W, making it the more power-efficient part for thermally constrained environments. It supports LPDDR4X memory in addition to DDR4, which is relevant for compact mobile designs. Its integrated Iris Xe Graphics G7 80EU is a newer, more capable iGPU than the UHD Graphics 630 in the i3-10305, though the database records no graphics benchmarks to quantify this.

The i5-1145G7E also offers Gen 4 PCIe with 4 lanes, while the i3-10305 offers Gen 3 with 16 lanes. The i5-1145G7E's larger per-core L2 cache (1.25 MB versus 256 KB) and larger per-core L1 cache (80 KB versus 64 KB) reflect its newer architecture. The i3-10305 counters with a higher boost clock (4.50 GHz versus 4.10 GHz) and a higher base clock (3.80 GHz versus 1500.00 MHz).

For a desktop user with access to a Socket 1200 motherboard, the i3-10305 is the pick. It wins all six benchmarks and carries a higher average score. For a mobile system integrator needing a low-power BGA 1449 processor, the i5-1145G7E is the only viable option of the two, but the data shows it loses every measured performance comparison. The choice is clear: the i3-10305 is the faster processor, and the i5-1145G7E is the more power-efficient, mobile-oriented part.