2 memory be a recognition of

My computer is 2 512 memory composed of dual-channel, before all perfectly good system to identify 1G memory, the recent slow sense, to see a system to identify only 512 of the memory.Who help me analyze the reasons for ah, this And the recently re-system related to it? Thank you.

Memory loose, re-plug you just fine.And the re – Systems do not make any difference!
Memory may be too long to remove loose or dirty
Eraser with memory metal should be inserted emphasis on the edge of the can does not matter, just boot time before the operating system on your computer You have to start testing the hardware.All external hardware detection and trouble-free End before entering the operating system you.Before you can do so now.You computer hardware compatibility is no problem.May be loose or a golden finger Oxidation of the reasons for it, pull down the rubber under the Sassafras Zaicha Goldfinger, should not the problem.Loosening the memory to memory ..pull down, rub a rub, and then just plug in Latin America ..