Intel Core i3-10300 vs Intel Core i3-10305T Comparison

Both the Intel Core i3-10300 and the Intel Core i3-10305T are 4-core, 8-thread Comet Lake desktop processors built for the LGA 1200 socket. The data shows they are remarkably close in raw performance, yet the meaningful differences lie in their power characteristics and operating clocks. The 10300 is the standard, higher-frequency part, while the 10305T is a low-power variant designed for thermally constrained systems. This analysis breaks down the benchmark results, architectural nuances, and specification gaps to help determine which processor fits a specific build.

Head-to-Head Benchmarks

The benchmark results across Cinebench R15, R20, and R23 show a consistent, though narrow, victory for the Intel Core i3-10300 in every single test. The 10300 wins all six head-to-head comparisons, but the margins are extremely tight, rarely exceeding a single percentage point.

In multi-core workloads, the 10300’s advantage is a steady 0.6%. This translates to a score of 673 versus 669 in Cinebench R15, 2808 versus 2791 in R20, and 6687 versus 6647 in R23. A 0.6% delta is effectively negligible for real-world rendering tasks; both chips will take nearly the same amount of time to finish a multi-threaded render. The consistent delta suggests it is a direct result of the higher sustained clock speeds on the 10300, rather than any architectural efficiency gain.

The single-core results tell a similar story, but with slightly larger relative gaps. The 10300 leads by 1.1% in Cinebench R15 (95 vs 94) and by 0.8% in R20 (396 vs 393). In R23 single-core, the lead is again 0.6%, with scores of 944 and 938. For everyday tasks that rely on a single thread, like basic web browsing or office applications, this difference is imperceptible. The 10300 is technically faster, but the 10305T is close enough that a user would not notice a difference without a frame rate counter or a stopwatch on a long encode.

The average benchmark score for the 10300 is 1934, while the 10305T sits at 1922. This places both processors in the 43rd percentile of all CPUs, indicating they are firmly mid-range parts. The 10300’s closest rivals include the Intel Core i7-1180G7 and AMD Opteron 6348, both with a delta of 0.2%, and the Intel Core i7-7820HQ, which is 0.3% slower. The 10305T’s rival list includes the Intel Xeon E3-1231 v3 (-0.2%) and the AMD Ryzen 3 7320U (0.3% faster). These rival lists show that both chips are clustered in the same performance tier, competing with older high-end mobile parts and entry-level server chips.

Where Each One Wins

Based on the benchmark data, the Intel Core i3-10300 wins in every compute scenario measured. It is the faster chip for both multi-threaded and single-threaded workloads. The data shows a definitive, albeit small, performance advantage for the 10300 across all Cinebench versions.

The Intel Core i3-10305T, however, wins in a category not covered by Cinebench: power consumption. Its 35W TDP is significantly lower than the 10300’s 62W TDP. This is not a performance win, but a thermal and efficiency win. The 10305T is the better choice for small form factor (SFF) builds, silent PCs with low-profile coolers, or any system where heat dissipation and power draw are the primary constraints. It sacrifices a marginal amount of performance to fit into a much lower power envelope.

Therefore, the 10300 is the pick for a standard desktop build where performance is the sole priority. The 10305T is the pick for a compact or fanless-oriented build where the low power draw is more valuable than a 0.6% to 1.1% performance increase.

Architecture Differences

Both processors are built on Intel’s 14nm process node and share the same fundamental Comet Lake architecture. The core configuration is identical: 4 cores and 8 threads. Cache hierarchies are also the same, with 64 KB of L1 per core, 256 KB of L2 per core, and a shared 8 MB L3 cache.

The primary architectural difference is the codename. The 10300 is listed as "Comet Lake," while the 10305T is listed as "Comet Lake-R." This suggests a refresh of the original design, but the benchmark and cache data show no functional difference in the core architecture itself. The memory controller is also identical, supporting dual-channel DDR4 with a bandwidth of 42.7 GB/s. Both chips have 16 PCIe Gen 3 lanes and integrate a UHD Graphics 630 GPU.

The real difference is not in the architecture, but in the binning and power limits. The 10305T has a base clock of 3.00 GHz and a boost clock of 4.00 GHz, while the 10300 runs at 3.70 GHz base and 4.40 GHz boost. This 0.70 GHz gap in base clock and 0.40 GHz gap in boost clock is the direct cause of the performance scores. The 10305T is a lower-clocked, lower-voltage part designed to stay within its 35W TDP, while the 10300 uses its higher power budget to sustain higher frequencies.

FAQ

Q: Is the Intel Core i3-10300 significantly faster than the 10305T?

A: No. The 10300 wins all Cinebench R15, R20, and R23 tests, but the margins are between 0.6% and 1.1%. This is a minor performance lead, not a generational leap.

Q: Why does the 10305T have a lower clock speed?

A: The 10305T has a base clock of 3.00 GHz and a boost of 4.00 GHz, compared to the 10300’s 3.70 GHz and 4.40 GHz. This is to keep its TDP at 35W, which is much lower than the 10300’s 62W TDP.

Q: Do these CPUs have the same amount of cache?

A: Yes. Both have 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache.

Q: Can I use the same motherboard for both processors?

A: Yes. Both use the Intel Socket 1200 and have 16 PCIe Gen 3 lanes, so they are compatible with the same socket type.

Q: Which processor has better single-core performance?

A: The Intel Core i3-10300. In Cinebench R23 single-core, it scores 944 versus the 10305T’s 938, a 0.6% advantage. The lead is larger in R15 single-core at 1.1%.

Q: Is the 10305T a good choice for a high-performance gaming PC?

A: The data suggests both chips are similar, but the 10300 is faster. The 10305T’s advantage is its low 35W TDP, which is ideal for compact builds, but the 10300 offers higher clock speeds for maximum performance.

Specification Differences

The following table highlights only the fields where the two processors differ according to the fact pack.

| Specification | Intel Core i3-10300 | Intel Core i3-10305T |

| :--- | :--- | :--- |

| Base Clock | 3.70 GHz | 3.00 GHz |

| Boost Clock | 4.40 GHz | 4.00 GHz |

| TDP | 62 W | 35 W |

| Codename | Comet Lake | Comet Lake-R |

| Release Date | 2020-04-29 | 2021-03-15 |

| Launch MSRP | Not specified | $143 |

| Part Number | SRH3J | SRH3M |

| Avg Benchmark Score | 1934 | 1922 |

| Nearest Rival (Sample) | Intel Core i7-1180G7 (0.2%) | Intel Xeon E3-1231 v3 (-0.2%) |

All other specifications, including cores, threads, cache sizes, memory support, integrated graphics, socket, and process node, are identical.

The Verdict

The choice between these two processors is strictly a matter of power versus performance. The benchmark data is clear: the Intel Core i3-10300 is the faster CPU. It wins every single head-to-head benchmark, from multi-core rendering to single-core tasks. Its higher base and boost clocks deliver a tangible, if small, performance advantage across all Cinebench tests. For a standard desktop build where a 62W TDP is not a concern, the 10300 is the straightforward choice for maximum speed.

The Intel Core i3-10305T is for a different use case. Its 35W TDP is a defining feature that makes it suitable for systems where power draw and heat output are critical. In a small form factor case with limited airflow or a passive cooling solution, the 10305T is the superior option. The performance penalty is minimal, with an average score difference of only 12 points (1934 vs 1922), but the power savings are substantial. Users who prioritize a quiet, cool, and energy-efficient system over a marginal performance gain should select the 10305T. If the system allows for a standard cooler and has adequate ventilation, the 10300 is the better-performing part.