No, you need a minimum of 512mb ram. And since you have that small amount of ram, I am assuming that your processor and GPU will be out of date and unable to run COD 4.
DDR2 RAM is slightly smaller and has square chips. DDR1 RAM has rectangular chips.
DDR1 RAM typically has 184 pins and a notch located closer to the center. DDR2 RAM has 240 pins and a notch positioned more towards one side. You can also look at the labeling on the RAM module itself to identify whether it is DDR1 or DDR2.
There is no difference, except that your computer will be using two ram slots, instead of just one.
The difference between DDR1 ram and DDR2 ram, is the advancement in technology. When you upgrade to DDR2, you are doubling the amount of flow information that can take place.
single
Ram is memory. That means you have 67MB of ram left for you to use out of your 256MB of memory.
256mb system (XDR) and 256mb video (GDDR3)
that depends on wether the ram is DDR1, DDR2 OR DDR3 RAM
DDR by a long shot
No
ddr1 and ddr2
open it up a look.