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OESF Portables Forum > General Forums > General Discussion
systemparadox
I'm sure this would be very useful for everyone...
Could someone with a bit more knowledge in this area give us a comparison of flash memory please?
I'm thinking of: CF, SD, MMC, possibly others for reference (SM? miniSD? CF-Microdrive? RS-MMC?), and their ultra high speed variants.

Also, what speeds are the Zaurii capable of (and any differences)?

Thanks
Simon
systemparadox
It seems that there is more info on this forum than I could originally find...

Excellent CF/SD/CFMicrodrive benchmark tests by kopsis
CF vs SD
Regular SD vs High Speed/Ultra SD

The general consensus is:
- CF should always be faster than SD.
- CF microdrives are a bit slower than solid state CF, but not by much.
- All SD runs in MMC mode (serial), so normal SD is still slower than it should be.
- Ultra SD usually makes very little difference (though some people have noticed significant changes- see next point).
- Differences in speed are usually due to the overall quality of the card.
- The speed drops when the processor is under load.
- SD speed drops dramatically when the processor is under load.
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