Is there a big difference between i5 and i7?

What is the difference between i5 processor and i7 processor? From the naming point of view, i7 can be regarded as a high-end version of i5. i7 has 4 more threads than i5, and the main frequency is generally higher, so in terms of performance, i7 is much better than i5. Therefore, many netizens directly believe that the performance of i7 is better than that of i5, and the performance gap is large.

However, although most i7 performance is worse than i5, this is mainly for products of the same generation, and it cannot be absolutely considered that i5 performance is not as good as i7. (Recommended learning: PHP video tutorial)

Among CPUs of the same generation, there is no problem with i7>i5, and i7 is generally much better than i5. This is true. However, among different generations of CPUs, there are variables in the difference between i5 and i7. For example, the performance of Intel's seventh-generation i5-7600K is equivalent to that of the fourth-generation i7-4770, and its performance is better than that of many Intel's third-generation ivy bridge i7. Therefore, when comparing the differences between i5 and i7, you also need to specify whether the products are of the same generation, specific CPU models, etc.

Regarding whether there is a big difference between i5 and i7, you need to check whether they are of the same generation. Among products of the same generation, i7 performance is better than i5, but for products of different generations, you also need to look at the specific models.

The difference between processor i5 and i7

1. Hyper-threading. The i5 does not have hyper-threading technology, but the i7 does. As for the principles and efficiency of hyper-threading, please refer to Wikipedia.

2. Level 2 cache/level 3 cache size. Due to its higher-end positioning, i7 usually has larger L2 cache and L3 cache.

3. Bus speed. There is no such thing as FSB now, but there is still a similar QPI/DMI bus. The bus speed is higher and can support higher frequency memory by default, which increases throughput and improves performance.

4. Number of PCI-E channels. Since most of the modules of the Southbridge have been integrated into the CPU before, the PCI-E channel is actually provided by the CPU. I5 generally provides 24 PCI-E lanes, which can provide PCI-E x16 for graphics cards, while reserving another 8 lanes to support sound cards, network cards, and other PCI-E bus devices. The i7 has more than 36 PCI-E lanes (X58 36, X79 40), providing better support for dual graphics card interconnection and more PCI-E bus devices

5, the number of memory channels. This difference only exists when comparing the X series chipsets with other series chipsets. X58 provides three-channel memory controller, and P5x provides dual-channel. X79 is quad-channel, while H, Z, and P series chipsets offer dual-channel.

6. More cores. This difference only exists in the comparison between the X series chipset and other series chipsets. X58/X79 can support up to 6 cores and 12 threads CPU, but there are only four types of CPUs of this type: i7 980x/i7 990x/i7 3960x/i7 3970x. Other chipsets only support up to 4 cores and 8 threads.

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