Core i7-4558U vs Core 2 Quad Q9400 specs and performance
Our benchmark analysis concludes that the Core i7-4558U performs better than the Core 2 Quad Q9400. 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 i7-4558U. Indeed, the Core 2 Quad Q9400 has 4 cores compared to 2 cores found in the Core i7-4558U. But they both have the same number of threads. With our hardware info, we find that the Core i7-4558U has a slightly higher clock speed than the Core 2 Quad Q9400. A Core i7-4558U 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.
Modern CPUs generally have more logical cores than physical cores, this means that each core is split into multiple virtual cores, improving efficiency for parallel workloads. Indeed, the Core i7-4558U has more threads than cores. Each physical core is split into multiple threads.
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