PC Peripherals Help me in identifying actual frequency of this ram

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I got my pc assembled a year+ back. I had asked for a high frequency ram (Corsair brand as far as I remember) to be installed in the pc, as to the shopkeeper whose shop is far from my home (I dont remember the frequency of the ram I told him to install, but it was surely a high one - 1033Mhz+ or 1333 Mhz, as much as I remember). But I hadn't checked the components installed after getting the pc assembled.
Now, a year+ later, I used the software Speccy, from the makers of CCleaner. And it is showing the ram frequency to be very different and lower value (665 Mhz). So please guide me whether this ram is of slow frequency indeed and the shopkeeper cheated on me. AND WHETHER I SHOULD USE OR NOT USE THIS RAM IN MY NEW PC I AM GOING TO GET ASSEMBLED SOON. I dont intend to get the ram replaced from the shop as it is far away from my home, but want to ascertain its frequency and use in my soon to be assembled NEW PC.
In speccy, the ram is showing as - 8.00GB Dual-Channel DDR3 @ 665MHz (9-9-9-24). Please dont ask me to open my computer to check. Below is the screenshot from speccy.

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Motherboard of this old pc is Gigabyte B75M-D3H.


Can anyone confirm this, that the freq. of my bought rams is 1330 indeed, by looking into their own hardware specs of ram by downloading speccy from http://download.piriform.com/spsetup127.exe. (To show in their speccy as 665mhz or similar freq.). And should I use these rams IN MY NEW TO BE ASSEMBLED PC - a FAST pc I am about to build ? Cos this will save me cost of ram in my new pc - about Rs.6k.

Thanks.
 
Marcus Fenix said:
Dual Channel which will work out to 1333 MHz
Click to expand...
No, dual channel is completely different and has nothing to do with 'DDR' labelling.
Memory manufacturers do not take into account the channels at all when labelling, else they will have to account for triple channel and quad channel memory systems like in the Intel -E proc range.
 
Quoting from wiki:
http://en.wikipedia.org/wiki/DDR_SDRAM
http://en.wikipedia.org/wiki/DDR3_SDRAM
The interface uses double pumping (transferring data on both the rising and falling edges of the clock signal) to lower the clock frequency. One advantage of keeping the clock frequency down is that it reduces the signal integrity requirements on the circuit board connecting the memory to the controller. The name "double data rate" refers to the fact that a DDR SDRAM with a certain clock frequency achieves nearly twice the bandwidth of a SDR SDRAM running at the same clock frequency, due to this double pumping.

So, IO clock will be 666⅔ MHz for DDR3 1333Mhz.
 
The reason its called DDR is because of the tech used - Double Data Rate. Thus, the data exchanged happens twice per clock. Dual channel requires two memory controllers - each accesses the respective DRAM.
 
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