Intel Core i5-2300 vs Intel Core i7-5650U Comparison

Head-to-Head Benchmarks

The benchmark data paints a clear picture: the Intel Core i5-2300 wins every recorded head-to-head comparison. In Cinebench R15 multi-core, the i5-2300 scores 296 against the i7-5650U's 256, a 13.5% advantage. The gap widens slightly in Cinebench R20 multi-core, where the i5-2300 posts 1237 versus 1067, a 13.7% lead. Single-core results tell a similar story: Cinebench R20 single-core shows the i5-2300 at 174 and the i7-5650U at 150, a 13.8% difference. Cinebench R23 multi-core follows the trend with 2947 for the i5-2300 and 2542 for the i7-5650U, again a 13.7% margin. The most decisive gap appears in Cinebench R23 single-core, where the i5-2300's 416 beats the i7-5650U's 358 by 13.9%.

What is striking is the consistency of the delta. Across five different workloads, the i5-2300 holds a remarkably stable lead between 13.5% and 13.9%. This uniformity suggests the advantage is not workload-specific but reflects a fundamental throughput difference. The i7-5650U does not win a single head-to-head test, recording zero wins against five for the i5-2300.

Average benchmark scores align with this pattern. The i7-5650U averages 1027 across its benchmark suite, while the i5-2300 averages 1014. Despite the i5-2300 winning every direct comparison, its average score is actually slightly lower. This apparent contradiction stems from the different benchmark sets recorded for each chip: the i7-5650U includes Geekbench results, which the i5-2300 lacks. The Geekbench multi-core score of 1854 and single-core score of 960 for the i7-5650U pull its average upward.

Both processors sit at the 28th percentile versus all CPUs, meaning neither is a high-flying performer by modern standards. Their nearest rivals in the database are telling. The i7-5650U sits exactly level with the AMD Ryzen Embedded V1202B at 1027 average, within 0.1% of the Intel Core i3-4340, and within 0.2% of both the Intel Processor N150 and the Intel Xeon E5620. The i5-2300, meanwhile, lands within 0.2% of the Intel Xeon W5580 and the Intel Core i7-2675QM, within 0.3% of the Intel Core i3-4160, and within 0.5% of the Intel Core i3-7100H. The i5-2300's rival set includes a mobile quad-core from the same era, which reinforces the notion that its four physical cores carry real weight.

Architecture Differences

The fundamental architectural gap between these two chips is generational and physical. The i7-5650U is built on Broadwell, a 14 nm process node, while the i5-2300 uses Sandy Bridge on a 32 nm node. That is a full process generation apart, and the transistor counts reflect it: the i7-5650U packs 1,900 million transistors into a 133 mm² die, while the i5-2300 fits 1,160 million into a much larger 216 mm² die. The newer process allows the i7-5650U to be dramatically smaller and denser, but the i5-2300 compensates with a different core strategy.

Core counts diverge sharply. The i7-5650U has 2 physical cores and 4 threads thanks to Hyper-Threading. The i5-2300 has 4 physical cores and 4 threads, with no Hyper-Threading. This explains the multi-core benchmark results: the i5-2300's four full cores outmuscle the i7-5650U's two cores with two extra threads. In single-core work, the i5-2300 also wins, likely due to its higher base clock of 2.80 GHz against 2.20 GHz, though the i7-5650U boosts higher at 3.20 GHz versus 3.10 GHz.

Cache hierarchies differ in size. Both chips use 64 KB of L1 per core and 256 KB of L2 per core, but the shared L3 cache tells a different story: the i7-5650U has 4 MB shared, while the i5-2300 has 6 MB shared. The larger L3 on the i5-2300 may help its four cores feed data more effectively, though the benchmark deltas suggest the core count and clock speeds are the dominant factors.

Memory support is limited to DDR3 for both, and both use dual-channel buses. The i7-5650U lists a memory bandwidth of 29.9 GB/s, while the i5-2300's bandwidth is not recorded in the database. Neither supports ECC memory. PCIe capabilities differ: the i7-5650U offers Gen 2 with 12 lanes, while the i5-2300 offers Gen 3 with 16 lanes. That is a meaningful platform difference for expansion, though it matters more for desktop builds than the mobile-oriented i7-5650U.

Integrated graphics are another differentiator. The i7-5650U ships with Intel HD 6000, while the i5-2300 has Intel HD 2000. The database does not record performance numbers for either iGPU, but the generation gap suggests the Broadwell-era HD 6000 is the more capable graphics solution. The i7-5650U also targets a completely different market segment: mobile, with a 15 W TDP, versus the i5-2300's desktop segment at 95 W TDP. That 80 W difference in thermal design power is enormous and frames the entire comparison as one of efficiency and efficiency-class physics.

Sockets differ accordingly, with the i7-5650U using Intel BGA 1168 and the i7-5650U being soldered, while the i5-2300 uses the socketed Intel Socket 1155. The i7-5650U is a BGA part, not upgradeable, while the i5-2300 can be installed and replaced in a desktop board. Both are end-of-life production parts. The i7-5650U launched on 2015-02-28 with a launch MSRP of $426; the i5-2300 launched on 2011-01-08 with no recorded launch MSRP.

Where Each One Wins

The i5-2300 wins everywhere the benchmark suite measures. Multi-core rendering, single-core rendering, all of it. The recorded data shows no test where the i7-5650U pulls ahead. The i5-2300's 13.5% to 13.9% margins across Cinebench versions indicate a consistent throughput advantage in both lightly threaded and fully threaded workloads. For CPU-bound desktop tasks like rendering, transcoding, or compilation, the i5-2300 is the clear choice based on these numbers.

The i7-5650U's case rests on factors outside the Cinebench suite. It includes Geekbench results in its recorded benchmarks: 1854 multi-core and 960 single-core. The i5-2300 has no Geekbench scores in the database, so direct comparison on that workload is impossible. The i7-5650U also offers a dramatically lower TDP of 15 W versus 95 W, making it suitable for thin-and-light mobile systems where power draw and heat output are critical constraints. Its integrated graphics, Intel HD 6000, is a later-generation part and likely handles media tasks better than the i5-2300's Intel HD 2000, though no benchmark numbers confirm this.

The i7-5650U's 14 nm process and smaller die size (133 mm² versus 216 mm²) point to a far more power-efficient design. For workloads that are bursty or short-lived, such as light productivity or media playback, the i7-5650U may feel adequate while consuming a fraction of the power. But the database does not record battery life or power efficiency benchmarks, so this remains an inference from the TDP and process node data rather than a measured performance claim.

The i5-2300, conversely, is a desktop part with no mobility constraints. Its 95 W TDP and socketed design suggest it belongs in a system with a real cooler and a power supply. For sustained multi-threaded workloads, its four physical cores provide a steadier foundation than the i7-5650U's two cores with four threads. The i5-2300's PCIe Gen 3 support with 16 lanes also makes it more suitable for discrete GPUs and expansion cards, though again, no benchmark data directly measures this.

FAQ

Q: Which CPU is faster in multi-core Cinebench R23?

A: The Intel Core i5-2300 scores 2947 in Cinebench R23 multi-core, which is 13.7% ahead of the Intel Core i7-5650U's 2542.

Q: Does the i7-5650U win any head-to-head benchmark?

A: No. The recorded head-to-head tests show the i5-2300 winning all five comparisons, with the i7-5650U recording zero wins.

Q: How do the core counts compare?

A: The i7-5650U has 2 cores and 4 threads, while the i5-2300 has 4 cores and 4 threads. The i5-2300 has no Hyper-Threading, but its four physical cores provide the multi-core advantage.

Q: What is the TDP difference?

A: The i7-5650U has a 15 W TDP, while the i5-2300 has a 95 W TDP. This reflects the i7-5650U's mobile design versus the i5-2300's desktop design.

Q: Do both CPUs support ECC memory?

A: No. Both the i7-5650U and the i5-2300 do not support ECC memory.

Q: How do their average benchmark scores compare?

A: The i7-5650U averages 1027, while the i5-2300 averages 1014. The i7-5650U's average is slightly higher, but this includes Geekbench results that the i5-2300 does not have recorded.

Specification Differences

The two processors differ across nearly every major specification. The i7-5650U has 2 cores and 4 threads, while the i5-2300 has 4 cores and 4 threads. Base clocks differ: 2.20 GHz for the i7-5650U versus 2.80 GHz for the i5-2300. Boost clocks are closer, with the i7-5650U reaching 3.20 GHz and the i5-2300 reaching 3.10 GHz. TDP is the starkest difference: 15 W for the i7-5650U versus 95 W for the i5-2300. Sockets differ entirely: Intel BGA 1168 for the i7-5650U versus Intel Socket 1155 for the i5-2300.

The architecture and process nodes are generations apart. The i7-5650U uses Broadwell on a 14 nm node, while the i5-2300 uses Sandy Bridge on a 32 nm node. Transistor counts are 1,900 million versus 1,160 million, and die sizes are 133 mm² versus 216 mm². L3 cache is 4 MB shared on the i7-5650U versus 6 MB shared on the i5-2300. The i7-5650U records a memory bandwidth of 29.9 GB/s, while the i5-2300 has no recorded memory bandwidth. PCIe support differs: Gen 2 with 12 lanes for the i7-5650U versus Gen 3 with 16 lanes for the i5-2300.

Integrated graphics differ: Intel HD 6000 on the i7-5650U versus Intel HD 2000 on the i5-2300. Market segments are opposite: mobile for the i7-5650U versus desktop for the i5-2300. Release dates are years apart, with the i7-5650U launching on 2015-02-28 and the i5-2300 on 2011-01-08. The i7-5650U has a launch MSRP of $426, while the i5-2300 has no recorded MSRP. Both lack an unlocked multiplier, and both are end-of-life parts.

The Verdict

The data directs different buyers to different chips. Anyone building or upgrading a desktop system with CPU-heavy workloads in mind should choose the Intel Core i5-2300. It wins every recorded benchmark by a consistent 13.5% to 13.9% margin, offers four physical cores, a larger 6 MB L3 cache, and PCIe Gen 3 support with 16 lanes. Its 95 W TDP is a non-issue in a desktop chassis with adequate cooling.

The Intel Core i7-5650U makes sense in a completely different context. Its 15 W TDP, 14 nm process, and mobile BGA socket target thin-and-light laptops where power efficiency is paramount. The data shows it is slower in every tested CPU workload, but it also offers a newer integrated graphics solution in Intel HD 6000 and a much smaller physical footprint at 133 mm². For a mobile device prioritizing battery life and low heat output over raw throughput, the i7-5650U is the appropriate part.

The average benchmark scores are nearly identical, with the i7-5650U at 1027 and the i5-2300 at 1014, and both sit at the 28th percentile versus all CPUs. The practical takeaway is that these are two very different processors that happen to land near each other in overall standing. The i5-2300 is the faster chip, period. The i7-5650U is the more efficient chip, and that efficiency is its entire value proposition. Choose based on the platform, not the benchmark scores, because the benchmarks only tell half the story.