You have to establish what memory modules your computer motherboard supports in terms of physical size, speed and memory capacity. These work perfectly provided their specification matches that which your motherboard supports. They allowed me to expand my computer's memory to its maximum size of 4 gb.
its ddr2...were on skylake ddr4 at time of writing..yeah its for older motherboards..not particularly quick..1 gb stick on its own would be laughable..a pair is minimum..2gb when 8 or 16 is the norm..but 2gigs will run windows7 almost maxed out much of the time..windows experience index rates it the slowest part of my pc not far behind my AMD dual core processor..but the pair are taking whats demanded of them and stable..so ive gotta give them 4 stars..ive got older pc's than this..and newer..specs