Intel Core i5-2300 vs Intel Core i7-2675QM Comparison

The Intel Core i5-2300 and Intel Core i7-2675QM are both Sandy Bridge parts from 2011, but they target completely different platforms—one a desktop chip, the other a mobile chip. Despite the i5’s higher base clock, the benchmark data consistently favors the i7 across every tested workload. The i7-2675QM wins all five head-to-head comparisons, making it the clear performance leader in this matchup, albeit by a modest margin.

Head-to-Head Benchmarks

The i7-2675QM takes every single benchmark in the head-to-head comparison, with margins that are consistent and narrow. In Cinebench R15 multi-core, the i7 scores 314 against the i5-2300’s 296, a 5.7% advantage. That pattern repeats in Cinebench R20 multi-core, where the i7 posts 1309 versus 1237, a 5.5% lead. The story is identical in Cinebench R23 multi-core: the i7 reaches 3118 while the i5 manages 2947, again a 5.5% difference.

Single-core results tell the same tale. In Cinebench R20 single-core, the i7-2675QM scores 184 compared to the i5-2300’s 174, a 5.4% edge. Cinebench R23 single-core shows the i7 at 440 versus the i5’s 416, a 5.5% gap. The i5-2300 fails to secure a single win in any of the five head-to-head tests.

The average benchmark scores confirm the overall picture, though the gap narrows. The i5-2300 has an average benchmark score of 1014, while the i7-2675QM sits at 1012. The nearest rivals list shows the i5-2300 is 0.2% above the i7-2675QM in average score, while the i7 is 0.2% below the i5. That near-parity in aggregate benchmarks masks the i7’s consistent, if small, victories in every Cinebench test.

For context, both processors sit at the 28th percentile among all CPUs. The i5-2300’s nearest rivals include the Intel Xeon W5580 (0.2% ahead), the i7-2675QM itself (0.2% ahead), and the Intel Core i3-4160 (0.3% behind). The i7-2675QM’s rivals include the Xeon W5580 (tied), the i5-2300 (0.2% behind), and the Intel Core i3-7100H (0.3% ahead). These are tightly clustered parts, but the i7’s multi-threading advantage shows up consistently in threaded workloads.

Architecture Differences

Both processors share the same fundamental architecture: Sandy Bridge, built on Intel’s 32 nm process at Intel’s foundry. Both have identical transistor counts at 1,160 million and identical die sizes at 216 mm². The cache hierarchy is also the same: 64 KB of L1 per core, 256 KB of L2 per core, and 6 MB of shared L3 cache.

The core counts match at four physical cores, but the threading differs significantly. The i5-2300 has four threads total, meaning no Hyper-Threading. The i7-2675QM has eight threads, doubling the logical processor count. This is the single biggest architectural difference and explains why the i7 wins all multi-core benchmarks despite its lower base clock.

Clock speeds differ as well. The i5-2300 runs a base clock of 2.80 GHz and a boost clock of 3.10 GHz. The i7-2675QM starts at 2.20 GHz base but matches the i5’s 3.10 GHz boost. The i7’s lower base clock is offset by its additional threads, and both chips top out at the same boost frequency.

The integrated graphics differ: the i5-2300 uses Intel HD 2000, while the i7-2675QM has Intel HD 3000. Neither is a gaming powerhouse, but the i7’s graphics solution is a step up in Intel’s lineup. The i5-2300 also specifies PCIe Gen 3 with 16 lanes (CPU only), while the i7-2675QM’s PCIe information is not listed in the data.

Memory support shows a difference in specification detail. The i5-2300 supports DDR3 with dual-channel memory, while the i7-2675QM’s memory support field is not specified, though it does list dual-channel memory bus. Both lack ECC memory support. Neither processor has an unlocked multiplier, so overclocking is off the table for both.

Where Each One Wins

The i7-2675QM wins every benchmark in the comparison, so its strengths are clear. Multi-threaded workloads benefit most from its eight threads. Cinebench R15, R20, and R23 multi-core tests all show the i7 ahead by roughly 5.5%, which directly reflects the Hyper-Threading advantage. If a workload scales with thread count, the i7-2675QM is the better choice.

Single-core performance also favors the i7, despite its lower base clock. The i7’s 3.10 GHz boost clock matches the i5’s, and the i7 still manages a 5.4-5.5% lead in single-core Cinebench tests. This suggests the i7’s architecture or turbo behavior gives it a slight edge per clock, even without the threading benefit.

The i5-2300 has no benchmark wins to point to. Its higher base clock of 2.80 GHz does not translate into any tested performance advantage. The only area where the i5 might have a practical edge is platform-level: it uses Socket 1155, a desktop socket, while the i7 uses BGA 1224, which is soldered to a mobile board. That is a physical and upgrade-path difference, not a performance one.

For use cases, the i7-2675QM is the pick for any multi-threaded productivity task, whether rendering, video encoding, or compiling. The i5-2300’s desktop socket makes it suitable for a fixed desktop build, but the data shows no workload where it outperforms the i7.

Specification Differences

The two processors differ in several key specification fields. The most important is thread count: the i5-2300 has 4 threads, while the i7-2675QM has 8. Base clock differs, with the i5 at 2.80 GHz and the i7 at 2.20 GHz, though both boost to 3.10 GHz. The TDP is dramatically different: the i5-2300 draws 95 W, while the i7-2675QM uses only 45 W, reflecting its mobile nature.

The socket is a major divergence. The i5-2300 uses Intel Socket 1155, a desktop platform. The i7-2675QM uses Intel BGA 1224, a mobile socket that is not upgradeable. The market segment reflects this: the i5 is a Desktop part, while the i7 is Mobile.

Integrated graphics differ, with the i5-2300 featuring Intel HD 2000 and the i7-2675QM featuring Intel HD 3000. The i5-2300 lists PCIe Gen 3 with 16 lanes (CPU only), while the i7-2675QM has no PCIe information provided. Memory support is listed as DDR3 for the i5, while the i7’s memory support field is null, though both use dual-channel memory buses.

Release dates differ by about nine months. The i5-2300 launched on 2011-01-08, while the i7-2675QM launched on 2011-10-11. Both are end-of-life products. Part numbers are SR00D for the i5 and SR02S for the i7. Neither has a launch MSRP listed, and neither has an unlocked multiplier.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i7-2675QM wins all three multi-core Cinebench tests. It scores 314 in R15 versus 296, 1309 in R20 versus 1237, and 3118 in R23 versus 2947. The i7 leads by 5.5-5.7% in each case.

Q: Does the i5-2300 win any benchmark?

A: No. The head-to-head data shows the i7-2675QM winning all five comparisons. The i5-2300 has zero wins, while the i7 has five.

Q: Why does the i7-2675QM win despite a lower base clock?

A: The i7-2675QM has 8 threads versus the i5-2300’s 4 threads. Both processors boost to 3.10 GHz, but the i7’s additional threads provide a consistent advantage in threaded tests. The i7 also wins single-core tests, so its per-core performance is slightly better despite the lower base clock.

Q: Are the processors the same architecture?

A: Yes, both are Sandy Bridge parts on Intel’s 32 nm process. They share the same transistor count (1,160 million), die size (216 mm²), and cache configuration (64 KB L1 per core, 256 KB L2 per core, 6 MB shared L3).

Q: What is the TDP difference?

A: The i5-2300 has a 95 W TDP, while the i7-2675QM has a 45 W TDP. This reflects the i5’s desktop design versus the i7’s mobile design, despite the i7 having more threads.

Q: Can these processors be overclocked?

A: No. Both have locked multipliers, so neither supports overclocking.

The Verdict

The data is unambiguous: the Intel Core i7-2675QM is the faster processor in every tested benchmark. It wins all five head-to-head comparisons with margins between 5.4% and 5.7%. The i7’s eight threads give it a clear edge in multi-core workloads, and it even manages to beat the i5 in single-core tests despite a 0.60 GHz lower base clock.

The i5-2300’s only advantage is its higher base clock and desktop socket, but neither translates into a benchmark win. Its 95 W TDP is more than double the i7’s 45 W, yet it still loses in every test. The average benchmark scores are nearly identical—1014 for the i5 versus 1012 for the i7—but that aggregate hides the i7’s consistent superiority in the Cinebench suite.

Choose the i7-2675QM if you need the best performance in threaded applications and are building or upgrading a mobile platform. Choose the i5-2300 only if you require a desktop socket and accept a small but consistent performance deficit across the board. For raw compute capability, the i7-2675QM is the superior part.