4GB (2x2GB) of DDR2 800 MHz RAM. Now one of the main reasons I am upgrading is because my computer is having constant errors and bluescreens which I have narrowed down to being the memory, also my motherboard seems set all memory to 1.936V, I have checked in the BIOS and I can only change the voltage from 1.90v-2.10v so I would prefer if the memory was 1.9v or higher. Lastly on my Motherboard link there is a list of supported memory but I'd feel much safer buying from a trusted and well known brand such as OCZ or Kingston, so if you have any recommendations I'll be happy to hear them. Oh and I'm in the UK.
Thanks for the reply, do you think they will have any issue running with the motherboard I have listed?, also my BIOS can only set 1.90v-2.10v DDR Voltage, will these run correctly since it says 1.8v on the site?