LM4f232H5QD + sdram

I need to save and retrieve large amounts of data quickly from some memory.  tried with sd card / SD/HC by more initial tests at 80 MHz (ROM_SysCtlClockSet (SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ) I'll just get 1byte by US. 1byte/us I need rescue bytes faster than it, perhaps less than half the time. in the analysis of the driver to access the SD set_max_speed in mmc-ek-lm432h5qd.c realized that the maximum speed is set to Sd of 12.5MHz? it is possible to increase this speed. If i can't get necessarily speed with the SD,  texas would have some development kit with built-in SDRAM? with minimum speed> = 80MHz and support of the USB driver USB_Bulk implemented?

There are two things that might help you. I have no idea if the speed will be fast enough and whether they are generally workable in your situation.

SPI based SDRAM/

http://www.ipsilog.com/content/index.php?id=17&no_cache=1&tx_ttnews[tt_news]=5&tx_ttnews[backPid]=3

SPI Mode -- Serial Ferro-Magnetic (40MHz)

http://www.ramtron.com/products/nonvolatile-memory/serial-product.aspx?id=100

Again, not sure what your development skills are and if you can put together a circuit board. Maybe TI has an equivalent product -- I looked and could not find. (So much for seek and ye shall find...)

Let me know if either works out.

PS: I should mention that I do have an interest due to large volumes of data I would like to store  -- typically even Ethernet feed to a PC is over run by the micro controller.