miniSD 80X......er......80X what?

[Rayder]

I have a Transcend 2gig miniSD card stated as being 80X. What is "X"? 80 times what? What speed is 1X?

I've always wondered what they base the "X" factor on.......

Anyone know?

 

[larvi]

It's the same as the x in CD drives, i.e. 150kb/s so 80x would be 12mb/s

 

[Rayder]

Alrighty, thanks. That clears that up.

 

[Costello]

Correct me if I'm wrong but originally on CDs, the X means when you have a like a 80 minutes CD and you burn in 2x, then the time it'll take to burn will be 80/2 (= 40 minutes). It doesn't make much sense for other media though...

 

[larvi]

Lets see 80min x 60s x 150KB/s / 1024KB = 703MB which is about right for an 80min CD. Actually 1X probably corresponds with how fast a drive would need to spin to play back a music CD in real time, which would be the same for burning in real time.

 

[Icarus]

Correct me if I'm wrong but originally on CDs, the X means when you have a like a 80 minutes CD and you burn in 2x, then the time it'll take to burn will be 80/2 (= 40 minutes). It doesn't make much sense for other media though...

That's just writing speed, you can burn any movie with a filesize of 700 mbs and smaller with any speed you want(talking about divx). Slower speed you use for writing, it's easier for the player to read it. Writing speed doesn't have anything to the with their storage. They're always 700 mbs or 80 mins(I actually don't know how they determine that 80 mins though, doesn't it depend on the quality?)..

At least that's what I know