If the psu is:
P4 Ready
Intel P4 Recommended
AMD Recommended
the 2x2 connector is included. Most of the time, the psu also has a weird 1x6? (not sure) connector.
I know it sounds weird, but you better get a good brand psu. No-brand ones like these don't supply (most of the time) the right voltages on rails (12V rail gets 11.5V - 12.5V). Expensive brand ones keep hovering between 11.9V - 12.1V
Also, cheap psu's like Q-TEC and such cannot handle power-hungry hardware like radeon 9600+ / geforce 5700+. They say the psu is capable of delivering 500W for 20$... yeah right.
If you need a cheap solution, just take cheap one (non-silver).