No
No, the slots for DDR2 RAM is different from the DDR RAM. You cannot use DDR RAM with DDR2 slot.
No! They will not even fit into the socket unless its the correct one.
The answer is no you cannot switch from ddr to ddr2 since they are notched differently and will not fit,best is to check your motherboard manufacter to see the amount of ram and type your board supports,You will have to pull the cover off and see stamped on the board the name{manufacter] and model number then go to their site to get the specs,or you could use some trusted online software
The difference between the memory of the DDR2 RAM and the DDR3 RAM are the capacity that they can hold the DDR3 RAM is more powerful than the DDR2 RAM.
No DDR and DDR2 Slots are differant on Motherboard so cant replace each another
DDR2 RAM is slightly smaller and has square chips. DDR1 RAM has rectangular chips.
The DDR2 533 RAM is in fact compatible with an iMac. It is very advisable to upgrade an iMac with a DDR2 533 RAM as iMacs are really not known for their RAM.
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.
There are both the same thing, ddr2 ram, is faster that ddr1 ram but ddr3 ram is more modern and faster
Your motherboard might be able to 'clock back' the DDR400 to DDR333. This means that the DDR400 ram will reduce it's clock speed to DDR333 to be compatible. Not all motherboards support this though.
The Acer Aspire 3620 Notebook computer can use DDR2 PC2-4200 (DDR2-533) or DDR2 PC2-5300 (DDR2-667) which are 200-pin SODIMM modules. The Acer Aspire 3620 has two memory slots and each slot supports up to 1 Gigabyte of RAM for a total of 2 Gigabytes. This system uses unbuffered, Non-ECC, 1.8 Volt RAM.
no...you can't