CPU Comparison

The Intel Core i3-6300 and Intel Core i3-4150T are both dual-core, four-thread desktop processors, but the benchmark data shows a decisive performance gap. The i3-6300 wins all five head-to-head comparisons, with margins ranging from 39.3% to 39.9% across Cinebench tests. This is not a close contest; the i3-6300 is categorically faster in every measured workload, making it the clear choice for users prioritizing raw compute performance. The i3-4150T, with its lower 35W TDP, is a power-efficient alternative, but it sacrifices significant performance to achieve that efficiency.

Head-to-Head Benchmarks

The performance differential is consistent and substantial across all tested workloads. In Cinebench R15 multi-core, the i3-6300 scores 340 against the i3-4150T's 244, a 39.3% advantage. This pattern repeats in Cinebench R20 multi-core, where the i3-6300 posts 1419 versus 1018, a 39.4% lead. The single-core results follow the same trend: the i3-6300 achieves 200 in Cinebench R20 single-core, compared to 143 for the i3-4150T, a 39.9% difference. These margins are nearly identical across all tests, indicating a fundamental architectural and clock-speed advantage rather than workload-specific strengths.

The newest Cinebench R23 tests confirm the trend. In multi-core, the i3-6300 scores 3380 against 2425 for the i3-4150T, a 39.4% advantage. Single-core R23 performance shows the i3-6300 at 477 versus 342, a 39.5% lead. The consistency of these numbers, hovering just under 40%, suggests the i3-4150T is effectively running at a significant clock-speed disadvantage that scales evenly across both single-threaded and multi-threaded tasks. The i3-6300's base clock of 3.80 GHz versus the i3-4150T's 2.90 GHz explains much of this gap, as both processors have identical core and thread counts.

Notably, the i3-4150T does not appear in the i3-6300's head-to-head results for Cinebench R15 single-core or Geekbench tests, as the i3-6300 lacks those specific benchmark entries. However, the available data is unambiguous: the i3-6300 wins every comparison by roughly 39-40%. The i3-4150T has zero wins across the five head-to-head tests. The average benchmark scores reflect this closeness in overall standing, 978 for the i3-6300 and 975 for the i3-4150T, but the head-to-head deltas reveal a far larger gap in actual application performance.

FAQ

Q: Which processor has a higher base clock speed?

A: The Intel Core i3-6300 has a base clock of 3.80 GHz, while the Intel Core i3-4150T operates at 2.90 GHz. Neither processor supports boost clocks, so these are the maximum sustained frequencies.

Q: How much faster is the i3-6300 in multi-core workloads?

A: The i3-6300 leads by 39.3% in Cinebench R15 multi-core (340 vs 244) and by 39.4% in both Cinebench R20 multi-core (1419 vs 1018) and Cinebench R23 multi-core (3380 vs 2425).

Q: What are the thermal design power differences?

A: The i3-6300 has a TDP of 51W, while the i3-4150T is rated at 35W. The i3-4150T is designed for lower power consumption, which typically results in lower heat output and potentially smaller cooling requirements.

Q: Do these processors support the same memory type?

A: No. The i3-6300 supports DDR4 memory with dual-channel architecture and a memory bandwidth of 34.1 GB/s. The i3-4150T supports DDR3 memory with dual-channel architecture, but its memory bandwidth is not specified in the data.

Q: What are the integrated graphics solutions?

A: The i3-6300 features Intel HD 530 graphics, while the i3-4150T features Intel HD 4400 graphics. Both are integrated solutions, but the HD 530 is the newer generation.

Q: Which processor has more L3 cache?

A: The i3-6300 has 4 MB of shared L3 cache, while the i3-4150T has 3 MB of shared L3 cache. Both have identical L1 cache at 64 KB per core and L2 cache at 256 KB per core.

Architecture Differences

The two processors represent different Intel architectures and process nodes. The i3-6300 is built on the Skylake architecture using a 14 nm process node, while the i3-4150T uses the older Haswell architecture on a 22 nm process node. This generational leap is significant: the smaller 14 nm node allows for higher clock speeds at lower power draw, though the i3-6300 actually has a higher TDP at 51W compared to the i3-4150T's 35W.

Despite the architectural differences, both processors have identical core counts (2) and thread counts (4), and both are built by Intel with the same transistor count of 1,400 million. The die size differs, with the i3-6300 at 150 mm² and the i3-4150T at 177 mm². The smaller die size on the newer process node is a typical result of manufacturing improvements. The cache hierarchies also differ: the i3-6300 offers 4 MB of shared L3 cache versus 3 MB on the i3-4150T, while L1 and L2 caches are identical at 64 KB and 256 KB per core, respectively.

The socket and platform support differ substantially. The i3-6300 uses Intel Socket 1151, while the i3-4150T uses Intel Socket 1150. This means they are not interchangeable in motherboards. The i3-6300 also supports PCIe Gen 3 with 16 lanes (CPU only), whereas the i3-4150T lists PCIe Gen 3 without specifying lane count. The release dates reflect the generational gap: the i3-6300 launched in August 2015, while the i3-4150T launched over a year earlier in April 2014. The i3-6300 is listed as active in production, while the production status of the i3-4150T is not specified.

Specification Differences

The most critical specification difference is the base clock: 3.80 GHz for the i3-6300 versus 2.90 GHz for the i3-4150T. This 0.9 GHz difference directly drives the performance gap observed in benchmarks. The TDP also differs significantly: 51W for the i3-6300 versus 35W for the i3-4150T. The i3-4150T's "T" suffix typically indicates a low-power variant, which explains its reduced power envelope despite the older architecture.

The process node and die size represent another key difference: 14 nm and 150 mm² for the i3-6300, versus 22 nm and 177 mm² for the i3-4150T. Memory support diverges as well, the i3-6300 uses DDR4 with a specified bandwidth of 34.1 GB/s, while the i3-4150T uses DDR3 with no bandwidth specified. The L3 cache differs, with 4 MB on the i3-6300 and 3 MB on the i3-4150T. The integrated graphics also differ: Intel HD 530 on the i3-6300 versus Intel HD 4400 on the i3-4150T.

Socket compatibility is a major differentiator: Socket 1151 for the i3-6300 versus Socket 1150 for the i3-4150T. The PCIe specification is identical (Gen 3), but the i3-6300 explicitly lists 16 lanes (CPU only). The release date differs by roughly 16 months, with the i3-4150T launching first. Neither processor has an unlocked multiplier, and neither has a listed launch MSRP. The part number for the i3-6300 is SR2HA, while no part number is provided for the i3-4150T.

Where Each One Wins

The i3-6300 wins every benchmark category, making it the unambiguous performance leader. Its advantages are most pronounced in single-core workloads, where it leads by 39.9% in Cinebench R20 single-core (200 vs 143) and by 39.5% in Cinebench R23 single-core (477 vs 342). These single-core wins are critical for applications that rely heavily on per-thread performance, such as older games or lightly-threaded productivity apps. The multi-core results are nearly identical in margin, with leads of 39.3-39.4% across Cinebench R15, R20, and R23 multi-core tests.

The i3-4150T does not win any direct benchmark comparison, but its 35W TDP represents its key advantage. For systems where power consumption and heat output are primary concerns, such as small form factor builds or always-on systems, the i3-4150T's lower TDP allows for simpler cooling solutions and lower electricity draw. Its older Haswell architecture and Socket 1150 compatibility may also be relevant for users upgrading existing platforms without replacing their motherboard. However, the benchmark data shows no performance scenario where the i3-4150T comes out ahead.

The i3-6300's newer architecture and higher clock speed make it the better choice for any performance-focused workload. The 4 MB L3 cache versus 3 MB provides a small additional advantage in data-heavy tasks. The DDR4 memory support with 34.1 GB/s bandwidth also offers a modern memory ecosystem, though the i3-4150T's DDR3 support with unspecified bandwidth may be sufficient for older systems. The i3-6300's HD 530 graphics are also a newer generation than the i3-4150T's HD 4400, potentially offering better integrated graphics performance.

The Verdict

The data is unequivocal: the Intel Core i3-6300 is the superior processor in every benchmarked metric. With a 39.3-39.9% performance advantage across all Cinebench tests, the i3-6300 delivers roughly 40% more compute performance than the i3-4150T. This gap is consistent across single-core and multi-core workloads, indicating a broad, architectural superiority rather than a niche advantage. The higher 3.80 GHz base clock, newer 14 nm Skylake architecture, larger 4 MB L3 cache, and DDR4 memory support all contribute to this result.

Users should choose the i3-6300 if they prioritize raw performance, modern platform features, or future-proofing. It offers a 39.4% lead in Cinebench R23 multi-core (3380 vs 2425) and a 39.5% lead in single-core (477 vs 342), making it suitable for demanding applications that benefit from both multi-threading and strong per-core performance. The Socket 1151 platform and DDR4 memory support provide a more contemporary foundation for system builds.

The i3-4150T is only preferable in scenarios where its 35W TDP is a critical constraint, such as ultra-compact or passively-cooled systems. Its 51W TDP advantage over the i3-6300 means lower heat output and potentially quieter operation. However, this comes at the cost of a 39.3% multi-core performance deficit in Cinebench R15 (244 vs 340) and a 39.9% single-core deficit in Cinebench R20 (143 vs 200). For most users, the i3-6300's performance gains will outweigh the i3-4150T's power efficiency. The i3-4150T's only other advantage is legacy Socket 1150 compatibility, which is irrelevant for new builds. The verdict is simple: choose the i3-6300 for performance, or the i3-4150T only if power efficiency is the absolute priority.