1) How much Ram Memory do you have installed? If I have the spec's right, your motherboard's maximum amount of Ram Memory is 2GB.
(PC2-5300 would be best, but the amount is what matters, not the 'speed')
2) What is the Maximum Wattage for your Power Supply?
Takes power for each hardware component in the computer.
Motherboard, Processor, Ram Memory, Harddrive, Optical Drive/s, Graphics Card, etc.
When purchasing a graphics card, this is one of the minimum system requirements you need to know.
Spec's I looked up indicate a 300 Watt power supply.
This is the problem. That, and power supply's Acer uses are low quality.
If you had at least a 400 Watt power supply, you could use this,http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=41125&Sku=E145-0550
Slap that game around, and make it bark.http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3276573&CatId=1483
You could also run this if you had the above Power Supply,http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2048679&Sku=M452-7770
No. It does not matter if you are using DDR2 Sdram ram memory, and the graphics card has GDDR5 graphics memory.
A graphics card runs independent of the system resources.
(Processor and Ram Memory ]
For additional questions please post in a Comment.