How to improve CPU performance? This problem is the top priority for the two x86 processor leaders, AMD and Intel. Upgrading the process, changing the architecture and increasing the frequency are all ways to improve the CPU performance. If there is a way to double the CPU performance in an instant, why wouldn't AMD and Intel take it out?
It's also wrong to say that AMD and Intel don't do Dual CPU. In fact, they have dual or even four CPUs in servers and workstations. After the introduction of epyc, amd generally prefers the idea of single channel and multi-core, but dual channels are also supported.
The reason why we can't do it is very simple. It's troublesome and not profitable. The market is very small. It's all money losing, and it can't get the support of AMD / Intel. To do it, we have to have a server level chipset.
Now, there are still some ways to play the dual CPU. One is to buy the dual CPU for workstations from these motherboards manufacturers. As long as you are willing to spend money, it is OK to use the consumer platform.
There is also foreign garbage. Many people use Xeon E5 processors as two-way processors. Of course, these processors are garbage CPUs in the era of x99 or even X58. But they are cheaper than foreign garbage. They can set up a set of cheap workstations in less than 1K. Some applications are still beautiful.