I am using a PC for 5 years. My PC configaration is 80 GB HDD(PATA), 1 GB( 512 X 2 ) Memory (333MHZ, DDR). 2.4 GHZ Processor. 865 Biostar Motherboard.(At first I had 845 Mercury Motherboard). The problem is that At first I had 512 RAM. Before a month i had bought another 512 Mb Stick. to speed up my PC. But it worst my money. my computer is slowing down now. Every Time it hangs for some minute. after some time it is processing. In Short term i can say that 1gb Speed is less than 512Mb Ram speed in my PC. What is The Solution of the problem.