The complexity of the 4T cell is to make a resistor load high enough (in the range of giga-ohms) to minimize the current. However, this resistor must not be too high to guarantee good functionality. Despite its size advantage, the 4T cells have several limitations. These include the fact that each cell has current flowing in one resistor (i.e., the SRAM has a high standby current), the cell is sensitive to noise and soft error because the resistance is so high, and the cell is not as fast as the 6T cell.