Have you made the BIOS settings, memory, you just standard MEM test drive away, tried with another memory with 4 slats mother run? Here a mother, a memory, perhaps a second.... A good memory is not it SAMSUNG DDR-II DIMM 2Gb <PC2-6400>, this is not possible to decide correctly in two ways, or the method of scientific poke, either separately by the two bars test drive, and display all the contacts on the memory slots in order

I think this Patriot forgery Kingston ... yes and the manufacturer recommends the use of such memory modules PSD22G800K PSD22G800KH, the rest of this enthusiasm that led to such a, sorry for the expression.

But why then this memory will boot in the shop where I got it? And where you can download test?

Just really do not understand, you are writing about the two bars on giga, and you have 4 giga.... and plainly did not understand what....

Ok. One plank 2 gigabyte Patriot PC2-6400 CL5 and two bars, one each gigabyte Patriot PC2-6400 CL5 PSD22G8002. All modules at once put a PC does not boot only picture of my motherboard.

Insert a bar at 2 gigabyte and one bar on one gigabyte, everything is loaded.