Ddr2 To Ddr3 Slot Converter

Slot
OK! I am a noob at this!
I am running XP Pro 32-bit. I want to replace the Video Card. Nothing great or expensive...just a decent one. It for a friend (senior, that is why XP). I just got him a Dell Vostro 200 slim, added a 1TB HD and installed all drivers and XP. Please let me know 3 things:
1. Does ddr2 or ddr3 matter on the video card..is one better to run on XP
2. 64-bit or 32-bit. I assume 64 will run on 32-bit XP
3. Any suggestions on the card or where to buy (PCI Express 2.0X16)
Thanks! Ynot
Ddr2 vs ddr3

Ddr2 Vs Ddr3 Speed

Ddr2 ram to ddr3 slot converter

Ddr2 Vs Ddr3 Pins

DDR2 vs DDR3 comparison. DDR3 stands for double-data-rate three and is a random access memory technology used for high speed storage of the working data of a computer or other digital electronic device. DDR3 is part of the SDRAM (synchronous dynamic random access memory) family of.