Memory Clock Speed Question

I've been looking at different manufacturers versions of the Geforce GTS 450 1GB GDDR5 card, all not overclocked.
Now the Nvidia reference card is stated to have a memory speed of 1804 Mhz. On the other hand, many of the cards i've looked at are stated to have a memory speed of 3608 Mhz. And since i am torn between the Manli and the Inno3D versions (1804 Mhz and 3608 Mhz respectively), i want to know if this indeed a difference between those cards, or merely a different advertising scheme (especially since the 3608 value is the exact double of the 1804 value, and also, since they seem to have the same memory bandwidth of 57.7 GB/s with the same memory width of 128-bit).

So am i right in assuming that there is no actual difference between the 1804 Mhz and the 3608 Mhz cards??
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More about memory clock speed question
  1. You're correct - the speeds are identical, with only a different method of measuring them.
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