Core i3-8145U vs Core 2 Quad Q9400 comparison
In our benchmarks, the Core i3-8145U beats the Core 2 Quad Q9400 in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core 2 Quad Q9400 in all gaming tests too.
In terms of the number of cores of each of these CPUs, the Core 2 Quad Q9400 has significantly more cores than the Core i3-8145U. Indeed, the Core 2 Quad Q9400 has 4 cores compared to 2 cores found in the Core i3-8145U. But they both have the same number of threads. Our comparison shows that the Core 2 Quad Q9400 has a slightly higher clock speed compared to the Core i3-8145U. A Core i3-8145U CPU outputs less heat than a Core 2 Quad Q9400 CPU because of its significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The cache sizes of these CPUs are different. Indeed, the Core 2 Quad Q9400 has significantly more L2 cache than the Core i3-8145U
Most CPUs have more threads than cores. This technology, colloquially called hyperthreading, improves performance by splitting a core into multiple virtual ones. This provides more efficient utilisation of a core. Indeed, the Core i3-8145U has more threads than cores. Each physical core is split into multiple threads.
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