I hawe wierd think I just upgrade my MB with 8 gb ram in dual chanel buth after check in cpu-z at ram speed its shows 533 mhz rate I think its wrong !! or I am wrong ? Wuld be nice if somone explain me that !!
the motherboard supports ddr3 1333 hen overclocking it, so go into bios and find the option to force it from 1066 to 1333, if you don't find it, it will keep running like it is now until you replace this old pc
Actually, it's the DDR (stands for Double Data Rate) part, not the dual channel, that makes it read/write twice per clock cycle. I made the same mistake in the past.
So your RAM is being accessed 1066 million times per second with the clock running at 533MHz. That's probably as fast as your motherboard can handle but you didn't say what the motherboard is so it's impossible to say. The 1333 is the maximum speed that the DRAM modules will handle but it could be limited by the mobo. You might check in the BIOS to see if you can change the setting.
Each DRAM module in the system has a 64-bit wide data bus. The dual channel part (only if you are running 2 modules, e.g. 2X4GB in your case) makes it appear to the CPU as if the data bus is 128 bits wide so it can read/write twice as much data on each cycle.
the motherboard supports ddr3 1333 hen overclocking it, so go into bios and find the option to force it from 1066 to 1333, if you don't find it, it will keep running like it is now until you replace this old pc