View Full Version : mmc n compact flash

11-26-2004, 05:00 PM
actually,wat's the different between mmc n compact flash?
i mean the quality,speed n price......not the size

11-26-2004, 07:36 PM
Well they are unrelated except that they are both flash memory. CF is a good old standard that has been around for a while. MMC is a mostly dead end media that has been replaced by SD (Secure Digital). SD and MMC are the same size. SD cards came later and added an extra pair of contacts and digital rights management capability. SD cards are also much faster than MMC. You will have a very hard time finding MMC cards these days as aI think most companies stopped making them at about 32MB when SD was announced as a replacement.

SD and CF cards are generally pretty close in price. Performance is a different story and cannot be compared directly. The two formats are very different in design. CF cards all have their controller circuitry built into the card. SD, and most other media, require that the device have the controller circuits. This tends to mean that there is less difference in a deivec with different brands of SD cards than there would be with different brands of CF cards (assuming that you have a device that accepts both).