The products by DFI Company are affordable equipment but their quality is not excellent. The outdated models of motherboards by this company have no opportunities for overclocking and optimization but latest motherboards have already had some useful functions, for example, an opportunity to regulate frequencies of AGP and PCI-buses separately. Modern BIOS enable regulating frequencies of system, AGP- and PCI-buses, voltages, delays and other important parameters for good overclocking.
The main feature of motherboards by DFI is a reader of smart- and flash-cards.
Motherboards by Elitegroup are of low cost and have a good quality but they are not designed for overclocking. Good models of these motherboards have parameters that allow regulating the frequency of a system bus or processor multiplying ratio.