Intel Core i3-4330 vs Intel Core i7-5650U Comparison

The benchmark data is unambiguous: the Intel Core i3-4330 defeats the Intel Core i7-5650U in every single head-to-head test, with a consistent performance advantage that hovers around 14%. While the i7-5650U carries a higher-tier brand name and a more modern manufacturing process, the i3-4330's higher base clock and desktop-oriented design translate into superior raw compute power across all measured workloads. The i7-5650U does not win a single benchmark in this comparison, making the i3-4330 the clear performance leader despite its older architecture.

Head-to-Head Benchmarks

The i3-4330 wins all five head-to-head comparisons, with margins that are remarkably consistent across different Cinebench versions. In Cinebench R15 multi-core, the i3-4330 scores 298 against the i7-5650U's 256, a delta of -14.1% for the i7-5650U. This pattern repeats in Cinebench R20 multi-core, where the i3-4330 posts 1245 versus 1067, a 14.3% deficit for the mobile chip. The single-core results tell the same story: in Cinebench R20 single-core, the i3-4330 achieves 175 while the i7-5650U manages only 150, again a 14.3% gap.

The most recent benchmark in the set, Cinebench R23, confirms the trend with the largest margin. The i3-4330 scores 2966 in multi-core and 418 in single-core, while the i7-5650U trails at 2542 and 358 respectively, representing a 14.3% and 14.4% deficit. This consistency across all five tests is notable—it suggests the performance difference is structural rather than workload-specific. The i3-4330's advantage stems from its 3.50 GHz base clock, which is substantially higher than the i7-5650U's 2.20 GHz base clock, and the i7-5650U's boost clock of 3.20 GHz still falls short of the i3's constant operating frequency.

The average benchmark scores reinforce this picture. The i7-5650U has an average benchmark score of 1027, while the i3-4330 sits at 1020. These figures are nearly identical, placing both processors in the 28th percentile of all CPUs. The i7-5650U's nearest rivals include the AMD Ryzen Embedded V1202B at 1027 (0% delta) and the Intel Core i3-4340 at 1026 (0.1% delta), while the i3-4330's closest competitors are the Intel Pentium Gold G5600 at 1022 (-0.2% delta) and the Intel Core i3-4160 at 1017 (0.3% delta). The i7-5650U's slightly higher average score is driven by its Geekbench results—1854 multi-core and 960 single-core—which are not part of the head-to-head comparison set.

FAQ

Q: Which processor wins the most benchmarks?

A: The Intel Core i3-4330 wins all five head-to-head benchmarks. The i7-5650U records zero wins, with the i3-4330 taking Cinebench R15 multi-core, R20 multi-core, R20 single-core, R23 multi-core, and R23 single-core.

Q: How large is the performance gap between the two CPUs?

A: The i3-4330 leads by approximately 14% across all tests. The deltas range from -14.1% in Cinebench R15 multi-core to -14.4% in Cinebench R23 single-core, with most tests showing a -14.3% difference.

Q: Do both processors have the same core and thread counts?

A: Yes, both the i7-5650U and the i3-4330 feature 2 cores and 4 threads. They also share identical L1 cache (64 KB per core), L2 cache (256 KB per core), and L3 cache (4 MB shared).

Q: What are the clock speed differences?

A: The i3-4330 has a base clock of 3.50 GHz with no boost clock listed. The i7-5650U has a base clock of 2.20 GHz and a boost clock of 3.20 GHz, which is still lower than the i3's fixed operating speed.

Q: How do their average benchmark scores compare?

A: The i7-5650U has an average benchmark score of 1027, while the i3-4330 averages 1020. Both CPUs sit at the 28th percentile of all CPUs, making them statistically equivalent in overall average performance.

Q: Which processor has a higher TDP?

A: The i3-4330 has a TDP of 54 watts, while the i7-5650U consumes only 15 watts. This reflects their different market segments—desktop versus mobile.

Where Each One Wins

The i3-4330 wins in every compute-intensive benchmark category. Its victories span both multi-core and single-core workloads, covering Cinebench R15, R20, and R23. This makes it the appropriate choice for users prioritizing raw CPU throughput in rendering, encoding, or other heavily threaded tasks, as well as for lightly threaded applications that benefit from high single-core performance. The i3's 3.50 GHz base clock is the decisive factor, delivering consistent performance without relying on turbo boost behavior.

The i7-5650U, despite losing all head-to-head tests, has its own advantages outside raw benchmark scores. Its 15-watt TDP is dramatically lower than the i3's 54 watts, making it suitable for thermally constrained mobile environments. The i7-5650U also includes integrated Intel HD 6000 graphics, while the i3-4330 comes with Intel HD 4600, and the i7 supports PCIe Gen 2 with 12 lanes versus the i3's Gen 3 without lane details. For users who need a low-power processor for a laptop or compact system, the i7-5650U's efficiency profile is a legitimate draw, even if its benchmark scores are lower.

Neither processor wins on price—the i7-5650U has a launch MSRP of $426, while the i3-4330 has no listed launch MSRP. The i7-5650U's higher price combined with lower performance makes it difficult to recommend on a purely computational basis, but its mobile design and integrated graphics may justify the cost in specific form-factor-constrained builds.

Specification Differences

The two processors differ in several key specifications. The i7-5650U uses an Intel BGA 1168 socket, while the i3-4330 uses Intel Socket 1150. Their base clocks are significantly different: 2.20 GHz for the i7 versus 3.50 GHz for the i3. The i7-5650U has a boost clock of 3.20 GHz, whereas the i3-4330 has no boost clock listed. TDP also diverges sharply, with the i7 at 15 watts and the i3 at 54 watts.

Integrated graphics differ: the i7-5650U features Intel HD 6000, while the i3-4330 uses Intel HD 4600. PCIe support also varies—the i7 offers Gen 2 with 12 lanes (CPU only), while the i3 provides Gen 3 with no lane count specified. Memory bandwidth is listed only for the i7-5650U at 29.9 GB/s, with no figure given for the i3-4330. The i7-5650U has a launch MSRP of $426; the i3-4330 has none. Release dates also differ, with the i7 launching in 2015 and the i3 in 2013, though the i7 is marked as end-of-life while the i3's production status is not specified.

Architecture Differences

The i7-5650U is built on Intel's Broadwell architecture, specifically the Broadwell-U codename, using a 14 nm process node with 1,900 million transistors on a 133 mm² die. The i3-4330 uses the older Haswell architecture with a 22 nm process node, containing 1,400 million transistors on a larger 177 mm² die. This makes the i7-5650U the more advanced design in terms of manufacturing efficiency, with a smaller process node and higher transistor density.

Both processors share the same core and thread configuration (2 cores, 4 threads) and identical cache hierarchies: 64 KB L1 per core, 256 KB L2 per core, and 4 MB shared L3. Memory support is also the same—DDR3 with dual-channel bus—though memory bandwidth is only documented for the i7 at 29.9 GB/s. Neither processor supports ECC memory, and both have locked multipliers. The i7-5650U represents a newer generation (Core i7 Broadwell-U) compared to the i3-4330's Core i3 Haswell, but the architectural advancement does not translate into a performance win in the benchmark suite.

The Verdict

The data points to one clear conclusion: choose the Intel Core i3-4330 if raw performance is the priority. It wins every benchmark by a consistent margin of roughly 14%, and its 3.50 GHz base clock provides a stable, high-frequency baseline that the i7-5650U cannot match even at its maximum boost. The i3-4330 is the better processor for desktop users running Cinebench-style workloads, whether multi-threaded rendering or single-threaded tasks, and its older Haswell architecture does not hold it back in any measured test.

The Intel Core i7-5650U should be selected only when its mobile characteristics are essential. Its 15-watt TDP is a fraction of the i3's 54 watts, making it viable for ultra-portable designs where power consumption and heat dissipation are critical constraints. Its more advanced 14 nm Broadwell process and higher transistor count (1,900 million versus 1,400 million) also point to better efficiency per watt, even if that efficiency does not translate into higher benchmark scores. The i7-5650U's Intel HD 6000 graphics is a newer iGPU compared to the i3's HD 4600, which may matter in systems without discrete graphics.

For anyone building a desktop system with standard cooling and power budgets, the i3-4330 is the obvious choice—it delivers superior performance in every test and does so with a smaller die (133 mm² for the i7 versus 177 mm² for the i3, though the i3's larger die is paired with lower transistor count). The i7-5650U's only functional advantages are its mobility-oriented specifications and lower power draw, which are irrelevant for stationary desktop use. The verdict is decisive: five wins for the i3-4330, zero for the i7-5650U, and a performance gap that remains consistent across every benchmark generation.