A number of wrong notions about good computer use are on the internet. Which are true and which are false?

Let us find out.

Extending USB cables is bad

It’s often said that USB cables should not be extended. And there is something to it, at least when it comes to USB 3.0 connections, according to computer magazine C’t
Anyone connecting to a hard drive via an extension cable should expect a heavy decrease in transmission speed. It may also happen that devices are not recognised. USB 3.0 cables can be recognised by the fact that the plastic part of the square plug is coloured blue.

Turning off WiFi and Bluetooth saves battery

There’s also some truth in the belief that turning off WiFi and Bluetooth will save a notebook’s battery.

But in reality the gain is only a few minutes. In particular for devices with low battery capacity, it’ll have hardly any noticeable effect.

More processor cores mean better performance

It certainly sounds better, but does having double the processor cores really mean better performance? The answer is sometimes yes, sometimes no. More cores are better only when you’re comparing the same processor generation and type of a manufacturer.

If you compare different products, designs and manufacturers, a quad-core processor can actually be faster than an eight-core one.

More memory means less efficiency

There’s also a widespread belief that more memory in a computer leads to higher power consumption. In reality this is only the case under very high loads.

In normal operation or idle state, modern computers can switch into a power-saving mode so there is hardly any difference in energy consumption.

More memory makes my computer faster

Another memory myth is also only partially true, namely, that more memory automatically leads to better performance. This is only true if a system with too little memory has had a memory upgrade.