是一个8g内存条好还是两个4g好(内存条两根8g和一根16g哪个好)

The price of two 4G cables is about the same as a single 8G cable, but in terms of theoretical performance, dual channels are stronger than single channels, so there is no reason not to use them. Dual channel 4G. But for the mid-to-high-end i5 and i7 series U, you can decide based on your actual needs. If you consider future upgrades, a single 8G is worth considering. When the capacity is guaranteed, an 8G single has greater upgrade potential. Nowadays, the requirements for memory capacity are getting higher and higher, and two-channel 8G is the choice for mid-to-high-end users.

It is recommended to use two 4g 4g memory, which is the mainstream technology now. It is mature and stable
8g technology is not very stable yet

When we install a memory module in a laptop, is it better to install two 4G modules or one 8G module? Woolen cloth? This is a problem that many novices who assemble laptops will encounter. Today I will tell you in detail! First of all, if the 4GB memory stick and the 8GB memory stick are of the same brand and have the same frequency, a single 4GB memory stick should not have ddr4 now, so the frequency of the ddr3 memory stick is 1333, 1600, 1800.
Theoretically, two 4gb memory sticks can form dual channels, which means the memory sticks can transmit data faster and process faster. This is only theoretical, but in actual applications, today’s notebooks , unless it costs less than 3,000 yuan, like some low-end notebooks from HP, they will use integrated graphics cards, such as hd630. In this configuration, two 4gb memory sticks will run faster than a single 8gb memory stick. It's faster, but it's not a decisive factor. If the notebook has an independent graphics card, then there is not much difference in processing speed between two 4GB memory sticks and an 8GB memory stick.
Because if there is an integrated graphics card, when the integrated graphics card has insufficient video memory, physical memory will be dynamically allocated. In this case, dual-root memory is indeed faster than single-root memory.
If you are not planning to upgrade your computer in the future, then install two 4G memory sticks. But I personally don't recommend this, because the performance of 8g of memory is just adequate for today's computers. The price of memory is still falling. If you think the price is relatively expensive now, you can wait for a while before upgrading. For now, you only need to insert an 8g memory stick. When the price becomes cheaper, insert another one. 8g of memory sticks are combined into 16g of memory, so the performance will be greatly improved.
Dual-channel will definitely be better than single-channel, but the performance improvement of two 4G memory sticks and one 8G memory stick is very limited. Because the total capacity is not enough.
So I suggest you buy an 8g memory stick first, and then upgrade to an 8g memory stick when you have the opportunity.