usually you don't need to set any jumper settings in ddr or sdr. but if you wanna over-clock your motherboard(and it doesnt have voltage settings in its BIOS interface) you can set it by jumpers. you'll need its manufacturer's manual though. if you don't have that then atleast name of the manufacturer and motherboard's model number to look it up over the internet. crank up the ram voltage step by step.
and if you're talking about clock frequency then you might be using a PC older than a P3. P3s don't run ddr. and in sdr they have 100 and/or 133 mhz clock speed. you'll need to know which ram you've got than cross reference that on your motherboard's maunal.
any how i need more information for a proper answer.
No.
In order to upgrade SDRAM with DDR, you will need to replace your motherboard. DDR uses a different slot than SDRAM, so if your motherboard is using SDRAM currently, you will most likely have to replace your motherboard in order to make your system support DDR.
The term DDR SDRAM refers to the phrase "double data rate synchronous dynamic random access memory". DDR SDRAM is simply a faster version of SDRAM in which data travels at a double rate. If your computer specs say that it uses DDR SDRAM it can take DDR SDRAM, but not SDRAM. DDR is 184 pins and has a notch in the bottom near the center and you will be unable to put DDR in an SDRAM mother board and also unable to put SDRAM in a DDR motherboard. Recently a new type of RAM has been introduced to market called DDR2. DDR2 is its own type and will not fit into a DDR motherboard. Hope this helps. Peace.
DDR or SDRAM
DDR SDRAM uses 184 pins.
No, We Can't.
It is difficult unless the motherboard supports DDR slots.
No you cannot the ECS P4VXASD2 supports the following:Two 184-pin 2.5V DDR SDRAM (DDR266/DDR200) Maximum: 2GB DDR or SDRAM (Buffered) / 1GB DDR or SDRAM (Unbuffered)
No.
no,you need a new motherboard!
No. SDRAM and DDR SDRAM are not compatible with each other.
No. SDRAM has two notches and DDR SDRAM has only one so besides all the electrical incompatibilities it won't physically fit.